Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
f2c6203f MB |
2 | // |
3 | // core.c -- Voltage/Current Regulator framework. | |
4 | // | |
5 | // Copyright 2007, 2008 Wolfson Microelectronics PLC. | |
6 | // Copyright 2008 SlimLogic Ltd. | |
7 | // | |
8 | // Author: Liam Girdwood <lrg@slimlogic.co.uk> | |
414c70cb LG |
9 | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/init.h> | |
1130e5b3 | 12 | #include <linux/debugfs.h> |
414c70cb | 13 | #include <linux/device.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
f21e0e81 | 15 | #include <linux/async.h> |
414c70cb LG |
16 | #include <linux/err.h> |
17 | #include <linux/mutex.h> | |
18 | #include <linux/suspend.h> | |
31aae2be | 19 | #include <linux/delay.h> |
778b28b4 | 20 | #include <linux/gpio/consumer.h> |
69511a45 | 21 | #include <linux/of.h> |
65b19ce6 | 22 | #include <linux/regmap.h> |
69511a45 | 23 | #include <linux/regulator/of_regulator.h> |
414c70cb | 24 | #include <linux/regulator/consumer.h> |
d8ca7d18 | 25 | #include <linux/regulator/coupler.h> |
414c70cb LG |
26 | #include <linux/regulator/driver.h> |
27 | #include <linux/regulator/machine.h> | |
65602c32 | 28 | #include <linux/module.h> |
414c70cb | 29 | |
02fa3ec0 MB |
30 | #define CREATE_TRACE_POINTS |
31 | #include <trace/events/regulator.h> | |
32 | ||
34abbd68 | 33 | #include "dummy.h" |
0cdfcc0f | 34 | #include "internal.h" |
34abbd68 | 35 | |
f8702f9e DO |
36 | static DEFINE_WW_CLASS(regulator_ww_class); |
37 | static DEFINE_MUTEX(regulator_nesting_mutex); | |
414c70cb | 38 | static DEFINE_MUTEX(regulator_list_mutex); |
414c70cb | 39 | static LIST_HEAD(regulator_map_list); |
f19b00da | 40 | static LIST_HEAD(regulator_ena_gpio_list); |
a06ccd9c | 41 | static LIST_HEAD(regulator_supply_alias_list); |
d8ca7d18 | 42 | static LIST_HEAD(regulator_coupler_list); |
21cf891a | 43 | static bool has_full_constraints; |
414c70cb | 44 | |
1130e5b3 | 45 | static struct dentry *debugfs_root; |
1130e5b3 | 46 | |
8dc5390d | 47 | /* |
414c70cb LG |
48 | * struct regulator_map |
49 | * | |
50 | * Used to provide symbolic supply names to devices. | |
51 | */ | |
52 | struct regulator_map { | |
53 | struct list_head list; | |
40f9244f | 54 | const char *dev_name; /* The dev_name() for the consumer */ |
414c70cb | 55 | const char *supply; |
a5766f11 | 56 | struct regulator_dev *regulator; |
414c70cb LG |
57 | }; |
58 | ||
f19b00da KM |
59 | /* |
60 | * struct regulator_enable_gpio | |
61 | * | |
62 | * Management for shared enable GPIO pin | |
63 | */ | |
64 | struct regulator_enable_gpio { | |
65 | struct list_head list; | |
778b28b4 | 66 | struct gpio_desc *gpiod; |
f19b00da KM |
67 | u32 enable_count; /* a number of enabled shared GPIO */ |
68 | u32 request_count; /* a number of requested shared GPIO */ | |
f19b00da KM |
69 | }; |
70 | ||
a06ccd9c CK |
71 | /* |
72 | * struct regulator_supply_alias | |
73 | * | |
74 | * Used to map lookups for a supply onto an alternative device. | |
75 | */ | |
76 | struct regulator_supply_alias { | |
77 | struct list_head list; | |
78 | struct device *src_dev; | |
79 | const char *src_supply; | |
80 | struct device *alias_dev; | |
81 | const char *alias_supply; | |
82 | }; | |
83 | ||
414c70cb | 84 | static int _regulator_is_enabled(struct regulator_dev *rdev); |
5451781d | 85 | static int _regulator_disable(struct regulator *regulator); |
0f2d636e | 86 | static int _regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags); |
414c70cb LG |
87 | static int _regulator_get_current_limit(struct regulator_dev *rdev); |
88 | static unsigned int _regulator_get_mode(struct regulator_dev *rdev); | |
7179569a | 89 | static int _notifier_call_chain(struct regulator_dev *rdev, |
414c70cb | 90 | unsigned long event, void *data); |
75790251 MB |
91 | static int _regulator_do_set_voltage(struct regulator_dev *rdev, |
92 | int min_uV, int max_uV); | |
c054c6c7 MP |
93 | static int regulator_balance_voltage(struct regulator_dev *rdev, |
94 | suspend_state_t state); | |
3801b86a MB |
95 | static struct regulator *create_regulator(struct regulator_dev *rdev, |
96 | struct device *dev, | |
97 | const char *supply_name); | |
e1794aa4 | 98 | static void destroy_regulator(struct regulator *regulator); |
36a1f1b6 | 99 | static void _regulator_put(struct regulator *regulator); |
414c70cb | 100 | |
d22b85a1 | 101 | const char *rdev_get_name(struct regulator_dev *rdev) |
1083c393 MB |
102 | { |
103 | if (rdev->constraints && rdev->constraints->name) | |
104 | return rdev->constraints->name; | |
105 | else if (rdev->desc->name) | |
106 | return rdev->desc->name; | |
107 | else | |
108 | return ""; | |
109 | } | |
157d2230 | 110 | EXPORT_SYMBOL_GPL(rdev_get_name); |
1083c393 | 111 | |
87b28417 MB |
112 | static bool have_full_constraints(void) |
113 | { | |
75bc9641 | 114 | return has_full_constraints || of_have_populated_dt(); |
87b28417 MB |
115 | } |
116 | ||
8a34e979 WP |
117 | static bool regulator_ops_is_valid(struct regulator_dev *rdev, int ops) |
118 | { | |
119 | if (!rdev->constraints) { | |
120 | rdev_err(rdev, "no constraints\n"); | |
121 | return false; | |
122 | } | |
123 | ||
124 | if (rdev->constraints->valid_ops_mask & ops) | |
125 | return true; | |
126 | ||
127 | return false; | |
128 | } | |
129 | ||
66cf9a7e MP |
130 | /** |
131 | * regulator_lock_nested - lock a single regulator | |
132 | * @rdev: regulator source | |
f8702f9e | 133 | * @ww_ctx: w/w mutex acquire context |
66cf9a7e MP |
134 | * |
135 | * This function can be called many times by one task on | |
136 | * a single regulator and its mutex will be locked only | |
137 | * once. If a task, which is calling this function is other | |
138 | * than the one, which initially locked the mutex, it will | |
139 | * wait on mutex. | |
140 | */ | |
f8702f9e DO |
141 | static inline int regulator_lock_nested(struct regulator_dev *rdev, |
142 | struct ww_acquire_ctx *ww_ctx) | |
66cf9a7e | 143 | { |
f8702f9e DO |
144 | bool lock = false; |
145 | int ret = 0; | |
146 | ||
147 | mutex_lock(®ulator_nesting_mutex); | |
148 | ||
12235da8 | 149 | if (!ww_mutex_trylock(&rdev->mutex, ww_ctx)) { |
f8702f9e | 150 | if (rdev->mutex_owner == current) |
66cf9a7e | 151 | rdev->ref_cnt++; |
f8702f9e DO |
152 | else |
153 | lock = true; | |
154 | ||
155 | if (lock) { | |
156 | mutex_unlock(®ulator_nesting_mutex); | |
157 | ret = ww_mutex_lock(&rdev->mutex, ww_ctx); | |
158 | mutex_lock(®ulator_nesting_mutex); | |
66cf9a7e | 159 | } |
f8702f9e DO |
160 | } else { |
161 | lock = true; | |
66cf9a7e MP |
162 | } |
163 | ||
f8702f9e DO |
164 | if (lock && ret != -EDEADLK) { |
165 | rdev->ref_cnt++; | |
166 | rdev->mutex_owner = current; | |
167 | } | |
168 | ||
169 | mutex_unlock(®ulator_nesting_mutex); | |
170 | ||
171 | return ret; | |
66cf9a7e MP |
172 | } |
173 | ||
f8702f9e DO |
174 | /** |
175 | * regulator_lock - lock a single regulator | |
176 | * @rdev: regulator source | |
177 | * | |
178 | * This function can be called many times by one task on | |
179 | * a single regulator and its mutex will be locked only | |
180 | * once. If a task, which is calling this function is other | |
181 | * than the one, which initially locked the mutex, it will | |
182 | * wait on mutex. | |
183 | */ | |
4c9db393 | 184 | static void regulator_lock(struct regulator_dev *rdev) |
66cf9a7e | 185 | { |
f8702f9e | 186 | regulator_lock_nested(rdev, NULL); |
66cf9a7e MP |
187 | } |
188 | ||
189 | /** | |
190 | * regulator_unlock - unlock a single regulator | |
191 | * @rdev: regulator_source | |
192 | * | |
193 | * This function unlocks the mutex when the | |
194 | * reference counter reaches 0. | |
195 | */ | |
4c9db393 | 196 | static void regulator_unlock(struct regulator_dev *rdev) |
66cf9a7e | 197 | { |
f8702f9e | 198 | mutex_lock(®ulator_nesting_mutex); |
66cf9a7e | 199 | |
f8702f9e DO |
200 | if (--rdev->ref_cnt == 0) { |
201 | rdev->mutex_owner = NULL; | |
202 | ww_mutex_unlock(&rdev->mutex); | |
66cf9a7e | 203 | } |
f8702f9e DO |
204 | |
205 | WARN_ON_ONCE(rdev->ref_cnt < 0); | |
206 | ||
207 | mutex_unlock(®ulator_nesting_mutex); | |
66cf9a7e MP |
208 | } |
209 | ||
089e2cc2 | 210 | static bool regulator_supply_is_couple(struct regulator_dev *rdev) |
66cf9a7e | 211 | { |
089e2cc2 DO |
212 | struct regulator_dev *c_rdev; |
213 | int i; | |
214 | ||
215 | for (i = 1; i < rdev->coupling_desc.n_coupled; i++) { | |
216 | c_rdev = rdev->coupling_desc.coupled_rdevs[i]; | |
66cf9a7e | 217 | |
089e2cc2 DO |
218 | if (rdev->supply->rdev == c_rdev) |
219 | return true; | |
220 | } | |
221 | ||
222 | return false; | |
223 | } | |
224 | ||
f8702f9e DO |
225 | static void regulator_unlock_recursive(struct regulator_dev *rdev, |
226 | unsigned int n_coupled) | |
9f01cd4a | 227 | { |
0a7416f9 DO |
228 | struct regulator_dev *c_rdev, *supply_rdev; |
229 | int i, supply_n_coupled; | |
9f01cd4a | 230 | |
f8702f9e DO |
231 | for (i = n_coupled; i > 0; i--) { |
232 | c_rdev = rdev->coupling_desc.coupled_rdevs[i - 1]; | |
9243a195 MP |
233 | |
234 | if (!c_rdev) | |
235 | continue; | |
236 | ||
0a7416f9 DO |
237 | if (c_rdev->supply && !regulator_supply_is_couple(c_rdev)) { |
238 | supply_rdev = c_rdev->supply->rdev; | |
239 | supply_n_coupled = supply_rdev->coupling_desc.n_coupled; | |
240 | ||
241 | regulator_unlock_recursive(supply_rdev, | |
242 | supply_n_coupled); | |
243 | } | |
9243a195 | 244 | |
f8702f9e DO |
245 | regulator_unlock(c_rdev); |
246 | } | |
9f01cd4a SH |
247 | } |
248 | ||
f8702f9e DO |
249 | static int regulator_lock_recursive(struct regulator_dev *rdev, |
250 | struct regulator_dev **new_contended_rdev, | |
251 | struct regulator_dev **old_contended_rdev, | |
252 | struct ww_acquire_ctx *ww_ctx) | |
9f01cd4a | 253 | { |
9243a195 | 254 | struct regulator_dev *c_rdev; |
f8702f9e | 255 | int i, err; |
9f01cd4a | 256 | |
9243a195 MP |
257 | for (i = 0; i < rdev->coupling_desc.n_coupled; i++) { |
258 | c_rdev = rdev->coupling_desc.coupled_rdevs[i]; | |
456e7cdf | 259 | |
9243a195 MP |
260 | if (!c_rdev) |
261 | continue; | |
9f01cd4a | 262 | |
f8702f9e DO |
263 | if (c_rdev != *old_contended_rdev) { |
264 | err = regulator_lock_nested(c_rdev, ww_ctx); | |
265 | if (err) { | |
266 | if (err == -EDEADLK) { | |
267 | *new_contended_rdev = c_rdev; | |
268 | goto err_unlock; | |
269 | } | |
9243a195 | 270 | |
f8702f9e DO |
271 | /* shouldn't happen */ |
272 | WARN_ON_ONCE(err != -EALREADY); | |
273 | } | |
274 | } else { | |
275 | *old_contended_rdev = NULL; | |
276 | } | |
277 | ||
089e2cc2 | 278 | if (c_rdev->supply && !regulator_supply_is_couple(c_rdev)) { |
f8702f9e DO |
279 | err = regulator_lock_recursive(c_rdev->supply->rdev, |
280 | new_contended_rdev, | |
281 | old_contended_rdev, | |
282 | ww_ctx); | |
283 | if (err) { | |
284 | regulator_unlock(c_rdev); | |
285 | goto err_unlock; | |
286 | } | |
66cf9a7e MP |
287 | } |
288 | } | |
f8702f9e DO |
289 | |
290 | return 0; | |
291 | ||
292 | err_unlock: | |
293 | regulator_unlock_recursive(rdev, i); | |
294 | ||
295 | return err; | |
66cf9a7e MP |
296 | } |
297 | ||
38de19fa | 298 | /** |
f8702f9e DO |
299 | * regulator_unlock_dependent - unlock regulator's suppliers and coupled |
300 | * regulators | |
301 | * @rdev: regulator source | |
302 | * @ww_ctx: w/w mutex acquire context | |
303 | * | |
48f1b4ef | 304 | * Unlock all regulators related with rdev by coupling or supplying. |
38de19fa | 305 | */ |
f8702f9e DO |
306 | static void regulator_unlock_dependent(struct regulator_dev *rdev, |
307 | struct ww_acquire_ctx *ww_ctx) | |
9f01cd4a | 308 | { |
f8702f9e DO |
309 | regulator_unlock_recursive(rdev, rdev->coupling_desc.n_coupled); |
310 | ww_acquire_fini(ww_ctx); | |
9f01cd4a SH |
311 | } |
312 | ||
313 | /** | |
9243a195 MP |
314 | * regulator_lock_dependent - lock regulator's suppliers and coupled regulators |
315 | * @rdev: regulator source | |
f8702f9e | 316 | * @ww_ctx: w/w mutex acquire context |
9243a195 MP |
317 | * |
318 | * This function as a wrapper on regulator_lock_recursive(), which locks | |
48f1b4ef | 319 | * all regulators related with rdev by coupling or supplying. |
9f01cd4a | 320 | */ |
f8702f9e DO |
321 | static void regulator_lock_dependent(struct regulator_dev *rdev, |
322 | struct ww_acquire_ctx *ww_ctx) | |
9f01cd4a | 323 | { |
f8702f9e DO |
324 | struct regulator_dev *new_contended_rdev = NULL; |
325 | struct regulator_dev *old_contended_rdev = NULL; | |
326 | int err; | |
9f01cd4a | 327 | |
f8702f9e | 328 | mutex_lock(®ulator_list_mutex); |
456e7cdf | 329 | |
f8702f9e | 330 | ww_acquire_init(ww_ctx, ®ulator_ww_class); |
9f01cd4a | 331 | |
f8702f9e DO |
332 | do { |
333 | if (new_contended_rdev) { | |
334 | ww_mutex_lock_slow(&new_contended_rdev->mutex, ww_ctx); | |
335 | old_contended_rdev = new_contended_rdev; | |
336 | old_contended_rdev->ref_cnt++; | |
337 | } | |
338 | ||
339 | err = regulator_lock_recursive(rdev, | |
340 | &new_contended_rdev, | |
341 | &old_contended_rdev, | |
342 | ww_ctx); | |
343 | ||
344 | if (old_contended_rdev) | |
345 | regulator_unlock(old_contended_rdev); | |
346 | ||
347 | } while (err == -EDEADLK); | |
348 | ||
349 | ww_acquire_done(ww_ctx); | |
350 | ||
351 | mutex_unlock(®ulator_list_mutex); | |
9f01cd4a SH |
352 | } |
353 | ||
fe06051d | 354 | /** |
355 | * of_get_child_regulator - get a child regulator device node | |
356 | * based on supply name | |
357 | * @parent: Parent device node | |
358 | * @prop_name: Combination regulator supply name and "-supply" | |
359 | * | |
360 | * Traverse all child nodes. | |
361 | * Extract the child regulator device node corresponding to the supply name. | |
362 | * returns the device node corresponding to the regulator if found, else | |
363 | * returns NULL. | |
364 | */ | |
365 | static struct device_node *of_get_child_regulator(struct device_node *parent, | |
366 | const char *prop_name) | |
367 | { | |
368 | struct device_node *regnode = NULL; | |
369 | struct device_node *child = NULL; | |
370 | ||
371 | for_each_child_of_node(parent, child) { | |
372 | regnode = of_parse_phandle(child, prop_name, 0); | |
373 | ||
374 | if (!regnode) { | |
375 | regnode = of_get_child_regulator(child, prop_name); | |
81eeb0a3 ND |
376 | if (regnode) |
377 | goto err_node_put; | |
fe06051d | 378 | } else { |
81eeb0a3 | 379 | goto err_node_put; |
fe06051d | 380 | } |
381 | } | |
382 | return NULL; | |
81eeb0a3 ND |
383 | |
384 | err_node_put: | |
385 | of_node_put(child); | |
386 | return regnode; | |
fe06051d | 387 | } |
388 | ||
69511a45 RN |
389 | /** |
390 | * of_get_regulator - get a regulator device node based on supply name | |
391 | * @dev: Device pointer for the consumer (of regulator) device | |
392 | * @supply: regulator supply name | |
393 | * | |
394 | * Extract the regulator device node corresponding to the supply name. | |
167d41dc | 395 | * returns the device node corresponding to the regulator if found, else |
69511a45 RN |
396 | * returns NULL. |
397 | */ | |
398 | static struct device_node *of_get_regulator(struct device *dev, const char *supply) | |
399 | { | |
400 | struct device_node *regnode = NULL; | |
e9bb4a06 | 401 | char prop_name[64]; /* 64 is max size of property name */ |
69511a45 RN |
402 | |
403 | dev_dbg(dev, "Looking up %s-supply from device tree\n", supply); | |
404 | ||
e9bb4a06 | 405 | snprintf(prop_name, 64, "%s-supply", supply); |
69511a45 RN |
406 | regnode = of_parse_phandle(dev->of_node, prop_name, 0); |
407 | ||
408 | if (!regnode) { | |
fe06051d | 409 | regnode = of_get_child_regulator(dev->of_node, prop_name); |
410 | if (regnode) | |
411 | return regnode; | |
412 | ||
7799167b RH |
413 | dev_dbg(dev, "Looking up %s property in node %pOF failed\n", |
414 | prop_name, dev->of_node); | |
69511a45 RN |
415 | return NULL; |
416 | } | |
417 | return regnode; | |
418 | } | |
419 | ||
414c70cb | 420 | /* Platform voltage constraint check */ |
d22b85a1 DO |
421 | int regulator_check_voltage(struct regulator_dev *rdev, |
422 | int *min_uV, int *max_uV) | |
414c70cb LG |
423 | { |
424 | BUG_ON(*min_uV > *max_uV); | |
425 | ||
8a34e979 | 426 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) { |
7ebcf26c | 427 | rdev_err(rdev, "voltage operation not allowed\n"); |
414c70cb LG |
428 | return -EPERM; |
429 | } | |
430 | ||
431 | if (*max_uV > rdev->constraints->max_uV) | |
432 | *max_uV = rdev->constraints->max_uV; | |
433 | if (*min_uV < rdev->constraints->min_uV) | |
434 | *min_uV = rdev->constraints->min_uV; | |
435 | ||
89f425ed MB |
436 | if (*min_uV > *max_uV) { |
437 | rdev_err(rdev, "unsupportable voltage range: %d-%duV\n", | |
54abd335 | 438 | *min_uV, *max_uV); |
414c70cb | 439 | return -EINVAL; |
89f425ed | 440 | } |
414c70cb LG |
441 | |
442 | return 0; | |
443 | } | |
444 | ||
f7efad10 CZ |
445 | /* return 0 if the state is valid */ |
446 | static int regulator_check_states(suspend_state_t state) | |
447 | { | |
448 | return (state > PM_SUSPEND_MAX || state == PM_SUSPEND_TO_IDLE); | |
449 | } | |
450 | ||
05fda3b1 TP |
451 | /* Make sure we select a voltage that suits the needs of all |
452 | * regulator consumers | |
453 | */ | |
d22b85a1 DO |
454 | int regulator_check_consumers(struct regulator_dev *rdev, |
455 | int *min_uV, int *max_uV, | |
456 | suspend_state_t state) | |
05fda3b1 TP |
457 | { |
458 | struct regulator *regulator; | |
c360a6df | 459 | struct regulator_voltage *voltage; |
05fda3b1 TP |
460 | |
461 | list_for_each_entry(regulator, &rdev->consumer_list, list) { | |
c360a6df | 462 | voltage = ®ulator->voltage[state]; |
4aa922c0 MB |
463 | /* |
464 | * Assume consumers that didn't say anything are OK | |
465 | * with anything in the constraint range. | |
466 | */ | |
c360a6df | 467 | if (!voltage->min_uV && !voltage->max_uV) |
4aa922c0 MB |
468 | continue; |
469 | ||
c360a6df CZ |
470 | if (*max_uV > voltage->max_uV) |
471 | *max_uV = voltage->max_uV; | |
472 | if (*min_uV < voltage->min_uV) | |
473 | *min_uV = voltage->min_uV; | |
05fda3b1 TP |
474 | } |
475 | ||
dd8004af | 476 | if (*min_uV > *max_uV) { |
9c7b4e8a RD |
477 | rdev_err(rdev, "Restricting voltage, %u-%uuV\n", |
478 | *min_uV, *max_uV); | |
05fda3b1 | 479 | return -EINVAL; |
dd8004af | 480 | } |
05fda3b1 TP |
481 | |
482 | return 0; | |
483 | } | |
484 | ||
414c70cb LG |
485 | /* current constraint check */ |
486 | static int regulator_check_current_limit(struct regulator_dev *rdev, | |
487 | int *min_uA, int *max_uA) | |
488 | { | |
489 | BUG_ON(*min_uA > *max_uA); | |
490 | ||
8a34e979 | 491 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_CURRENT)) { |
7ebcf26c | 492 | rdev_err(rdev, "current operation not allowed\n"); |
414c70cb LG |
493 | return -EPERM; |
494 | } | |
495 | ||
496 | if (*max_uA > rdev->constraints->max_uA) | |
497 | *max_uA = rdev->constraints->max_uA; | |
498 | if (*min_uA < rdev->constraints->min_uA) | |
499 | *min_uA = rdev->constraints->min_uA; | |
500 | ||
89f425ed MB |
501 | if (*min_uA > *max_uA) { |
502 | rdev_err(rdev, "unsupportable current range: %d-%duA\n", | |
54abd335 | 503 | *min_uA, *max_uA); |
414c70cb | 504 | return -EINVAL; |
89f425ed | 505 | } |
414c70cb LG |
506 | |
507 | return 0; | |
508 | } | |
509 | ||
510 | /* operating mode constraint check */ | |
109c75af CK |
511 | static int regulator_mode_constrain(struct regulator_dev *rdev, |
512 | unsigned int *mode) | |
414c70cb | 513 | { |
2c608234 | 514 | switch (*mode) { |
e573520b DB |
515 | case REGULATOR_MODE_FAST: |
516 | case REGULATOR_MODE_NORMAL: | |
517 | case REGULATOR_MODE_IDLE: | |
518 | case REGULATOR_MODE_STANDBY: | |
519 | break; | |
520 | default: | |
89f425ed | 521 | rdev_err(rdev, "invalid mode %x specified\n", *mode); |
e573520b DB |
522 | return -EINVAL; |
523 | } | |
524 | ||
8a34e979 | 525 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_MODE)) { |
7ebcf26c | 526 | rdev_err(rdev, "mode operation not allowed\n"); |
414c70cb LG |
527 | return -EPERM; |
528 | } | |
2c608234 MB |
529 | |
530 | /* The modes are bitmasks, the most power hungry modes having | |
531 | * the lowest values. If the requested mode isn't supported | |
69b8821e SK |
532 | * try higher modes. |
533 | */ | |
2c608234 MB |
534 | while (*mode) { |
535 | if (rdev->constraints->valid_modes_mask & *mode) | |
536 | return 0; | |
537 | *mode /= 2; | |
414c70cb | 538 | } |
2c608234 MB |
539 | |
540 | return -EINVAL; | |
414c70cb LG |
541 | } |
542 | ||
f7efad10 CZ |
543 | static inline struct regulator_state * |
544 | regulator_get_suspend_state(struct regulator_dev *rdev, suspend_state_t state) | |
545 | { | |
546 | if (rdev->constraints == NULL) | |
547 | return NULL; | |
548 | ||
549 | switch (state) { | |
550 | case PM_SUSPEND_STANDBY: | |
551 | return &rdev->constraints->state_standby; | |
552 | case PM_SUSPEND_MEM: | |
553 | return &rdev->constraints->state_mem; | |
554 | case PM_SUSPEND_MAX: | |
555 | return &rdev->constraints->state_disk; | |
556 | default: | |
557 | return NULL; | |
558 | } | |
559 | } | |
560 | ||
0955f5be SB |
561 | static const struct regulator_state * |
562 | regulator_get_suspend_state_check(struct regulator_dev *rdev, suspend_state_t state) | |
563 | { | |
564 | const struct regulator_state *rstate; | |
565 | ||
566 | rstate = regulator_get_suspend_state(rdev, state); | |
567 | if (rstate == NULL) | |
568 | return NULL; | |
569 | ||
570 | /* If we have no suspend mode configuration don't set anything; | |
571 | * only warn if the driver implements set_suspend_voltage or | |
572 | * set_suspend_mode callback. | |
573 | */ | |
574 | if (rstate->enabled != ENABLE_IN_SUSPEND && | |
575 | rstate->enabled != DISABLE_IN_SUSPEND) { | |
576 | if (rdev->desc->ops->set_suspend_voltage || | |
577 | rdev->desc->ops->set_suspend_mode) | |
578 | rdev_warn(rdev, "No configuration\n"); | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | return rstate; | |
583 | } | |
584 | ||
a277a262 Y |
585 | static ssize_t microvolts_show(struct device *dev, |
586 | struct device_attribute *attr, char *buf) | |
414c70cb | 587 | { |
a5766f11 | 588 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
c82f27df | 589 | int uV; |
414c70cb | 590 | |
66cf9a7e | 591 | regulator_lock(rdev); |
c82f27df | 592 | uV = regulator_get_voltage_rdev(rdev); |
66cf9a7e | 593 | regulator_unlock(rdev); |
414c70cb | 594 | |
c82f27df NS |
595 | if (uV < 0) |
596 | return uV; | |
597 | return sprintf(buf, "%d\n", uV); | |
414c70cb | 598 | } |
a277a262 | 599 | static DEVICE_ATTR_RO(microvolts); |
414c70cb | 600 | |
a277a262 Y |
601 | static ssize_t microamps_show(struct device *dev, |
602 | struct device_attribute *attr, char *buf) | |
414c70cb | 603 | { |
a5766f11 | 604 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
605 | |
606 | return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); | |
607 | } | |
a277a262 | 608 | static DEVICE_ATTR_RO(microamps); |
414c70cb | 609 | |
587cea27 GKH |
610 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, |
611 | char *buf) | |
bc558a60 MB |
612 | { |
613 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
bc558a60 | 614 | |
1083c393 | 615 | return sprintf(buf, "%s\n", rdev_get_name(rdev)); |
bc558a60 | 616 | } |
587cea27 | 617 | static DEVICE_ATTR_RO(name); |
bc558a60 | 618 | |
01de19d0 | 619 | static const char *regulator_opmode_to_str(int mode) |
414c70cb | 620 | { |
414c70cb LG |
621 | switch (mode) { |
622 | case REGULATOR_MODE_FAST: | |
01de19d0 | 623 | return "fast"; |
414c70cb | 624 | case REGULATOR_MODE_NORMAL: |
01de19d0 | 625 | return "normal"; |
414c70cb | 626 | case REGULATOR_MODE_IDLE: |
01de19d0 | 627 | return "idle"; |
414c70cb | 628 | case REGULATOR_MODE_STANDBY: |
01de19d0 | 629 | return "standby"; |
414c70cb | 630 | } |
01de19d0 DA |
631 | return "unknown"; |
632 | } | |
633 | ||
634 | static ssize_t regulator_print_opmode(char *buf, int mode) | |
635 | { | |
636 | return sprintf(buf, "%s\n", regulator_opmode_to_str(mode)); | |
414c70cb LG |
637 | } |
638 | ||
a277a262 Y |
639 | static ssize_t opmode_show(struct device *dev, |
640 | struct device_attribute *attr, char *buf) | |
414c70cb | 641 | { |
a5766f11 | 642 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 643 | |
4fca9545 DB |
644 | return regulator_print_opmode(buf, _regulator_get_mode(rdev)); |
645 | } | |
a277a262 | 646 | static DEVICE_ATTR_RO(opmode); |
4fca9545 DB |
647 | |
648 | static ssize_t regulator_print_state(char *buf, int state) | |
649 | { | |
414c70cb LG |
650 | if (state > 0) |
651 | return sprintf(buf, "enabled\n"); | |
652 | else if (state == 0) | |
653 | return sprintf(buf, "disabled\n"); | |
654 | else | |
655 | return sprintf(buf, "unknown\n"); | |
656 | } | |
657 | ||
a277a262 Y |
658 | static ssize_t state_show(struct device *dev, |
659 | struct device_attribute *attr, char *buf) | |
4fca9545 DB |
660 | { |
661 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
9332546f MB |
662 | ssize_t ret; |
663 | ||
66cf9a7e | 664 | regulator_lock(rdev); |
9332546f | 665 | ret = regulator_print_state(buf, _regulator_is_enabled(rdev)); |
66cf9a7e | 666 | regulator_unlock(rdev); |
4fca9545 | 667 | |
9332546f | 668 | return ret; |
4fca9545 | 669 | } |
a277a262 | 670 | static DEVICE_ATTR_RO(state); |
4fca9545 | 671 | |
a277a262 Y |
672 | static ssize_t status_show(struct device *dev, |
673 | struct device_attribute *attr, char *buf) | |
853116a1 DB |
674 | { |
675 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
676 | int status; | |
677 | char *label; | |
678 | ||
679 | status = rdev->desc->ops->get_status(rdev); | |
680 | if (status < 0) | |
681 | return status; | |
682 | ||
683 | switch (status) { | |
684 | case REGULATOR_STATUS_OFF: | |
685 | label = "off"; | |
686 | break; | |
687 | case REGULATOR_STATUS_ON: | |
688 | label = "on"; | |
689 | break; | |
690 | case REGULATOR_STATUS_ERROR: | |
691 | label = "error"; | |
692 | break; | |
693 | case REGULATOR_STATUS_FAST: | |
694 | label = "fast"; | |
695 | break; | |
696 | case REGULATOR_STATUS_NORMAL: | |
697 | label = "normal"; | |
698 | break; | |
699 | case REGULATOR_STATUS_IDLE: | |
700 | label = "idle"; | |
701 | break; | |
702 | case REGULATOR_STATUS_STANDBY: | |
703 | label = "standby"; | |
704 | break; | |
f59c8f9f MB |
705 | case REGULATOR_STATUS_BYPASS: |
706 | label = "bypass"; | |
707 | break; | |
1beaf762 KG |
708 | case REGULATOR_STATUS_UNDEFINED: |
709 | label = "undefined"; | |
710 | break; | |
853116a1 DB |
711 | default: |
712 | return -ERANGE; | |
713 | } | |
714 | ||
715 | return sprintf(buf, "%s\n", label); | |
716 | } | |
a277a262 | 717 | static DEVICE_ATTR_RO(status); |
853116a1 | 718 | |
a277a262 Y |
719 | static ssize_t min_microamps_show(struct device *dev, |
720 | struct device_attribute *attr, char *buf) | |
414c70cb | 721 | { |
a5766f11 | 722 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
723 | |
724 | if (!rdev->constraints) | |
725 | return sprintf(buf, "constraint not defined\n"); | |
726 | ||
727 | return sprintf(buf, "%d\n", rdev->constraints->min_uA); | |
728 | } | |
a277a262 | 729 | static DEVICE_ATTR_RO(min_microamps); |
414c70cb | 730 | |
a277a262 Y |
731 | static ssize_t max_microamps_show(struct device *dev, |
732 | struct device_attribute *attr, char *buf) | |
414c70cb | 733 | { |
a5766f11 | 734 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
735 | |
736 | if (!rdev->constraints) | |
737 | return sprintf(buf, "constraint not defined\n"); | |
738 | ||
739 | return sprintf(buf, "%d\n", rdev->constraints->max_uA); | |
740 | } | |
a277a262 | 741 | static DEVICE_ATTR_RO(max_microamps); |
414c70cb | 742 | |
a277a262 Y |
743 | static ssize_t min_microvolts_show(struct device *dev, |
744 | struct device_attribute *attr, char *buf) | |
414c70cb | 745 | { |
a5766f11 | 746 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
747 | |
748 | if (!rdev->constraints) | |
749 | return sprintf(buf, "constraint not defined\n"); | |
750 | ||
751 | return sprintf(buf, "%d\n", rdev->constraints->min_uV); | |
752 | } | |
a277a262 | 753 | static DEVICE_ATTR_RO(min_microvolts); |
414c70cb | 754 | |
a277a262 Y |
755 | static ssize_t max_microvolts_show(struct device *dev, |
756 | struct device_attribute *attr, char *buf) | |
414c70cb | 757 | { |
a5766f11 | 758 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
759 | |
760 | if (!rdev->constraints) | |
761 | return sprintf(buf, "constraint not defined\n"); | |
762 | ||
763 | return sprintf(buf, "%d\n", rdev->constraints->max_uV); | |
764 | } | |
a277a262 | 765 | static DEVICE_ATTR_RO(max_microvolts); |
414c70cb | 766 | |
a277a262 Y |
767 | static ssize_t requested_microamps_show(struct device *dev, |
768 | struct device_attribute *attr, char *buf) | |
414c70cb | 769 | { |
a5766f11 | 770 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
771 | struct regulator *regulator; |
772 | int uA = 0; | |
773 | ||
66cf9a7e | 774 | regulator_lock(rdev); |
5451781d DA |
775 | list_for_each_entry(regulator, &rdev->consumer_list, list) { |
776 | if (regulator->enable_count) | |
777 | uA += regulator->uA_load; | |
778 | } | |
66cf9a7e | 779 | regulator_unlock(rdev); |
414c70cb LG |
780 | return sprintf(buf, "%d\n", uA); |
781 | } | |
a277a262 | 782 | static DEVICE_ATTR_RO(requested_microamps); |
414c70cb | 783 | |
587cea27 GKH |
784 | static ssize_t num_users_show(struct device *dev, struct device_attribute *attr, |
785 | char *buf) | |
414c70cb | 786 | { |
a5766f11 | 787 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
788 | return sprintf(buf, "%d\n", rdev->use_count); |
789 | } | |
587cea27 | 790 | static DEVICE_ATTR_RO(num_users); |
414c70cb | 791 | |
587cea27 GKH |
792 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
793 | char *buf) | |
414c70cb | 794 | { |
a5766f11 | 795 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
796 | |
797 | switch (rdev->desc->type) { | |
798 | case REGULATOR_VOLTAGE: | |
799 | return sprintf(buf, "voltage\n"); | |
800 | case REGULATOR_CURRENT: | |
801 | return sprintf(buf, "current\n"); | |
802 | } | |
803 | return sprintf(buf, "unknown\n"); | |
804 | } | |
587cea27 | 805 | static DEVICE_ATTR_RO(type); |
414c70cb | 806 | |
a277a262 Y |
807 | static ssize_t suspend_mem_microvolts_show(struct device *dev, |
808 | struct device_attribute *attr, char *buf) | |
414c70cb | 809 | { |
a5766f11 | 810 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 811 | |
414c70cb LG |
812 | return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); |
813 | } | |
a277a262 | 814 | static DEVICE_ATTR_RO(suspend_mem_microvolts); |
414c70cb | 815 | |
a277a262 Y |
816 | static ssize_t suspend_disk_microvolts_show(struct device *dev, |
817 | struct device_attribute *attr, char *buf) | |
414c70cb | 818 | { |
a5766f11 | 819 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 820 | |
414c70cb LG |
821 | return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); |
822 | } | |
a277a262 | 823 | static DEVICE_ATTR_RO(suspend_disk_microvolts); |
414c70cb | 824 | |
a277a262 Y |
825 | static ssize_t suspend_standby_microvolts_show(struct device *dev, |
826 | struct device_attribute *attr, char *buf) | |
414c70cb | 827 | { |
a5766f11 | 828 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 829 | |
414c70cb LG |
830 | return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); |
831 | } | |
a277a262 | 832 | static DEVICE_ATTR_RO(suspend_standby_microvolts); |
414c70cb | 833 | |
a277a262 Y |
834 | static ssize_t suspend_mem_mode_show(struct device *dev, |
835 | struct device_attribute *attr, char *buf) | |
414c70cb | 836 | { |
a5766f11 | 837 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 838 | |
4fca9545 DB |
839 | return regulator_print_opmode(buf, |
840 | rdev->constraints->state_mem.mode); | |
414c70cb | 841 | } |
a277a262 | 842 | static DEVICE_ATTR_RO(suspend_mem_mode); |
414c70cb | 843 | |
a277a262 Y |
844 | static ssize_t suspend_disk_mode_show(struct device *dev, |
845 | struct device_attribute *attr, char *buf) | |
414c70cb | 846 | { |
a5766f11 | 847 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 848 | |
4fca9545 DB |
849 | return regulator_print_opmode(buf, |
850 | rdev->constraints->state_disk.mode); | |
414c70cb | 851 | } |
a277a262 | 852 | static DEVICE_ATTR_RO(suspend_disk_mode); |
414c70cb | 853 | |
a277a262 Y |
854 | static ssize_t suspend_standby_mode_show(struct device *dev, |
855 | struct device_attribute *attr, char *buf) | |
414c70cb | 856 | { |
a5766f11 | 857 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 858 | |
4fca9545 DB |
859 | return regulator_print_opmode(buf, |
860 | rdev->constraints->state_standby.mode); | |
414c70cb | 861 | } |
a277a262 | 862 | static DEVICE_ATTR_RO(suspend_standby_mode); |
414c70cb | 863 | |
a277a262 Y |
864 | static ssize_t suspend_mem_state_show(struct device *dev, |
865 | struct device_attribute *attr, char *buf) | |
414c70cb | 866 | { |
a5766f11 | 867 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 868 | |
4fca9545 DB |
869 | return regulator_print_state(buf, |
870 | rdev->constraints->state_mem.enabled); | |
414c70cb | 871 | } |
a277a262 | 872 | static DEVICE_ATTR_RO(suspend_mem_state); |
414c70cb | 873 | |
a277a262 Y |
874 | static ssize_t suspend_disk_state_show(struct device *dev, |
875 | struct device_attribute *attr, char *buf) | |
414c70cb | 876 | { |
a5766f11 | 877 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 878 | |
4fca9545 DB |
879 | return regulator_print_state(buf, |
880 | rdev->constraints->state_disk.enabled); | |
414c70cb | 881 | } |
a277a262 | 882 | static DEVICE_ATTR_RO(suspend_disk_state); |
414c70cb | 883 | |
a277a262 Y |
884 | static ssize_t suspend_standby_state_show(struct device *dev, |
885 | struct device_attribute *attr, char *buf) | |
414c70cb | 886 | { |
a5766f11 | 887 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 888 | |
4fca9545 DB |
889 | return regulator_print_state(buf, |
890 | rdev->constraints->state_standby.enabled); | |
414c70cb | 891 | } |
a277a262 | 892 | static DEVICE_ATTR_RO(suspend_standby_state); |
7ad68e2f | 893 | |
a277a262 Y |
894 | static ssize_t bypass_show(struct device *dev, |
895 | struct device_attribute *attr, char *buf) | |
f59c8f9f MB |
896 | { |
897 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
898 | const char *report; | |
899 | bool bypass; | |
900 | int ret; | |
901 | ||
902 | ret = rdev->desc->ops->get_bypass(rdev, &bypass); | |
903 | ||
904 | if (ret != 0) | |
905 | report = "unknown"; | |
906 | else if (bypass) | |
907 | report = "enabled"; | |
908 | else | |
909 | report = "disabled"; | |
910 | ||
911 | return sprintf(buf, "%s\n", report); | |
912 | } | |
a277a262 | 913 | static DEVICE_ATTR_RO(bypass); |
bc558a60 | 914 | |
0f2d636e ZW |
915 | #define REGULATOR_ERROR_ATTR(name, bit) \ |
916 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ | |
917 | char *buf) \ | |
918 | { \ | |
919 | int ret; \ | |
920 | unsigned int flags; \ | |
921 | struct regulator_dev *rdev = dev_get_drvdata(dev); \ | |
922 | ret = _regulator_get_error_flags(rdev, &flags); \ | |
923 | if (ret) \ | |
924 | return ret; \ | |
925 | return sysfs_emit(buf, "%d\n", !!(flags & (bit))); \ | |
926 | } \ | |
927 | static DEVICE_ATTR_RO(name) | |
928 | ||
929 | REGULATOR_ERROR_ATTR(under_voltage, REGULATOR_ERROR_UNDER_VOLTAGE); | |
930 | REGULATOR_ERROR_ATTR(over_current, REGULATOR_ERROR_OVER_CURRENT); | |
931 | REGULATOR_ERROR_ATTR(regulation_out, REGULATOR_ERROR_REGULATION_OUT); | |
932 | REGULATOR_ERROR_ATTR(fail, REGULATOR_ERROR_FAIL); | |
933 | REGULATOR_ERROR_ATTR(over_temp, REGULATOR_ERROR_OVER_TEMP); | |
934 | REGULATOR_ERROR_ATTR(under_voltage_warn, REGULATOR_ERROR_UNDER_VOLTAGE_WARN); | |
935 | REGULATOR_ERROR_ATTR(over_current_warn, REGULATOR_ERROR_OVER_CURRENT_WARN); | |
936 | REGULATOR_ERROR_ATTR(over_voltage_warn, REGULATOR_ERROR_OVER_VOLTAGE_WARN); | |
937 | REGULATOR_ERROR_ATTR(over_temp_warn, REGULATOR_ERROR_OVER_TEMP_WARN); | |
938 | ||
414c70cb | 939 | /* Calculate the new optimum regulator operating mode based on the new total |
69b8821e SK |
940 | * consumer load. All locks held by caller |
941 | */ | |
8460ef38 | 942 | static int drms_uA_update(struct regulator_dev *rdev) |
414c70cb LG |
943 | { |
944 | struct regulator *sibling; | |
945 | int current_uA = 0, output_uV, input_uV, err; | |
946 | unsigned int mode; | |
947 | ||
8460ef38 BA |
948 | /* |
949 | * first check to see if we can set modes at all, otherwise just | |
950 | * tell the consumer everything is OK. | |
951 | */ | |
74a569ee MG |
952 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS)) { |
953 | rdev_dbg(rdev, "DRMS operation not allowed\n"); | |
8460ef38 | 954 | return 0; |
74a569ee | 955 | } |
8460ef38 | 956 | |
8f4490e0 BA |
957 | if (!rdev->desc->ops->get_optimum_mode && |
958 | !rdev->desc->ops->set_load) | |
8460ef38 BA |
959 | return 0; |
960 | ||
8f4490e0 BA |
961 | if (!rdev->desc->ops->set_mode && |
962 | !rdev->desc->ops->set_load) | |
8460ef38 | 963 | return -EINVAL; |
414c70cb | 964 | |
414c70cb | 965 | /* calc total requested load */ |
5451781d DA |
966 | list_for_each_entry(sibling, &rdev->consumer_list, list) { |
967 | if (sibling->enable_count) | |
968 | current_uA += sibling->uA_load; | |
969 | } | |
414c70cb | 970 | |
22a10bca SB |
971 | current_uA += rdev->constraints->system_load; |
972 | ||
8f4490e0 BA |
973 | if (rdev->desc->ops->set_load) { |
974 | /* set the optimum mode for our new total regulator load */ | |
975 | err = rdev->desc->ops->set_load(rdev, current_uA); | |
976 | if (err < 0) | |
61aab5ad MM |
977 | rdev_err(rdev, "failed to set load %d: %pe\n", |
978 | current_uA, ERR_PTR(err)); | |
8f4490e0 | 979 | } else { |
57919f4a DA |
980 | /* |
981 | * Unfortunately in some cases the constraints->valid_ops has | |
982 | * REGULATOR_CHANGE_DRMS but there are no valid modes listed. | |
983 | * That's not really legit but we won't consider it a fatal | |
984 | * error here. We'll treat it as if REGULATOR_CHANGE_DRMS | |
985 | * wasn't set. | |
986 | */ | |
987 | if (!rdev->constraints->valid_modes_mask) { | |
988 | rdev_dbg(rdev, "Can change modes; but no valid mode\n"); | |
989 | return 0; | |
990 | } | |
991 | ||
57776617 | 992 | /* get output voltage */ |
d22b85a1 | 993 | output_uV = regulator_get_voltage_rdev(rdev); |
55841199 DA |
994 | |
995 | /* | |
996 | * Don't return an error; if regulator driver cares about | |
997 | * output_uV then it's up to the driver to validate. | |
998 | */ | |
999 | if (output_uV <= 0) | |
1000 | rdev_dbg(rdev, "invalid output voltage found\n"); | |
57776617 JP |
1001 | |
1002 | /* get input voltage */ | |
1003 | input_uV = 0; | |
1004 | if (rdev->supply) | |
1005 | input_uV = regulator_get_voltage(rdev->supply); | |
1006 | if (input_uV <= 0) | |
1007 | input_uV = rdev->constraints->input_uV; | |
55841199 DA |
1008 | |
1009 | /* | |
1010 | * Don't return an error; if regulator driver cares about | |
1011 | * input_uV then it's up to the driver to validate. | |
1012 | */ | |
1013 | if (input_uV <= 0) | |
1014 | rdev_dbg(rdev, "invalid input voltage found\n"); | |
57776617 | 1015 | |
8f4490e0 BA |
1016 | /* now get the optimum mode for our new total regulator load */ |
1017 | mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, | |
1018 | output_uV, current_uA); | |
1019 | ||
1020 | /* check the new mode is allowed */ | |
1021 | err = regulator_mode_constrain(rdev, &mode); | |
1022 | if (err < 0) { | |
61aab5ad MM |
1023 | rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV: %pe\n", |
1024 | current_uA, input_uV, output_uV, ERR_PTR(err)); | |
8f4490e0 BA |
1025 | return err; |
1026 | } | |
414c70cb | 1027 | |
8f4490e0 BA |
1028 | err = rdev->desc->ops->set_mode(rdev, mode); |
1029 | if (err < 0) | |
61aab5ad MM |
1030 | rdev_err(rdev, "failed to set optimum mode %x: %pe\n", |
1031 | mode, ERR_PTR(err)); | |
8460ef38 BA |
1032 | } |
1033 | ||
8460ef38 | 1034 | return err; |
414c70cb LG |
1035 | } |
1036 | ||
0955f5be SB |
1037 | static int __suspend_set_state(struct regulator_dev *rdev, |
1038 | const struct regulator_state *rstate) | |
414c70cb LG |
1039 | { |
1040 | int ret = 0; | |
638f85c5 | 1041 | |
72069f99 CZ |
1042 | if (rstate->enabled == ENABLE_IN_SUSPEND && |
1043 | rdev->desc->ops->set_suspend_enable) | |
414c70cb | 1044 | ret = rdev->desc->ops->set_suspend_enable(rdev); |
72069f99 CZ |
1045 | else if (rstate->enabled == DISABLE_IN_SUSPEND && |
1046 | rdev->desc->ops->set_suspend_disable) | |
414c70cb | 1047 | ret = rdev->desc->ops->set_suspend_disable(rdev); |
8ac0e95d AL |
1048 | else /* OK if set_suspend_enable or set_suspend_disable is NULL */ |
1049 | ret = 0; | |
1050 | ||
414c70cb | 1051 | if (ret < 0) { |
61aab5ad | 1052 | rdev_err(rdev, "failed to enabled/disable: %pe\n", ERR_PTR(ret)); |
414c70cb LG |
1053 | return ret; |
1054 | } | |
1055 | ||
1056 | if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { | |
1057 | ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); | |
1058 | if (ret < 0) { | |
61aab5ad | 1059 | rdev_err(rdev, "failed to set voltage: %pe\n", ERR_PTR(ret)); |
414c70cb LG |
1060 | return ret; |
1061 | } | |
1062 | } | |
1063 | ||
1064 | if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { | |
1065 | ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); | |
1066 | if (ret < 0) { | |
61aab5ad | 1067 | rdev_err(rdev, "failed to set mode: %pe\n", ERR_PTR(ret)); |
414c70cb LG |
1068 | return ret; |
1069 | } | |
1070 | } | |
414c70cb | 1071 | |
f7efad10 | 1072 | return ret; |
414c70cb LG |
1073 | } |
1074 | ||
0955f5be SB |
1075 | static int suspend_set_initial_state(struct regulator_dev *rdev) |
1076 | { | |
1077 | const struct regulator_state *rstate; | |
1078 | ||
1079 | rstate = regulator_get_suspend_state_check(rdev, | |
1080 | rdev->constraints->initial_state); | |
1081 | if (!rstate) | |
1082 | return 0; | |
1083 | ||
1084 | return __suspend_set_state(rdev, rstate); | |
1085 | } | |
1086 | ||
c845f21a GU |
1087 | #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) |
1088 | static void print_constraints_debug(struct regulator_dev *rdev) | |
414c70cb LG |
1089 | { |
1090 | struct regulation_constraints *constraints = rdev->constraints; | |
a7068e39 | 1091 | char buf[160] = ""; |
5751a99f | 1092 | size_t len = sizeof(buf) - 1; |
8f031b48 MB |
1093 | int count = 0; |
1094 | int ret; | |
414c70cb | 1095 | |
8f031b48 | 1096 | if (constraints->min_uV && constraints->max_uV) { |
414c70cb | 1097 | if (constraints->min_uV == constraints->max_uV) |
5751a99f SW |
1098 | count += scnprintf(buf + count, len - count, "%d mV ", |
1099 | constraints->min_uV / 1000); | |
414c70cb | 1100 | else |
5751a99f SW |
1101 | count += scnprintf(buf + count, len - count, |
1102 | "%d <--> %d mV ", | |
1103 | constraints->min_uV / 1000, | |
1104 | constraints->max_uV / 1000); | |
8f031b48 MB |
1105 | } |
1106 | ||
1107 | if (!constraints->min_uV || | |
1108 | constraints->min_uV != constraints->max_uV) { | |
d22b85a1 | 1109 | ret = regulator_get_voltage_rdev(rdev); |
8f031b48 | 1110 | if (ret > 0) |
5751a99f SW |
1111 | count += scnprintf(buf + count, len - count, |
1112 | "at %d mV ", ret / 1000); | |
8f031b48 MB |
1113 | } |
1114 | ||
bf5892a8 | 1115 | if (constraints->uV_offset) |
5751a99f SW |
1116 | count += scnprintf(buf + count, len - count, "%dmV offset ", |
1117 | constraints->uV_offset / 1000); | |
bf5892a8 | 1118 | |
8f031b48 | 1119 | if (constraints->min_uA && constraints->max_uA) { |
414c70cb | 1120 | if (constraints->min_uA == constraints->max_uA) |
5751a99f SW |
1121 | count += scnprintf(buf + count, len - count, "%d mA ", |
1122 | constraints->min_uA / 1000); | |
414c70cb | 1123 | else |
5751a99f SW |
1124 | count += scnprintf(buf + count, len - count, |
1125 | "%d <--> %d mA ", | |
1126 | constraints->min_uA / 1000, | |
1127 | constraints->max_uA / 1000); | |
8f031b48 MB |
1128 | } |
1129 | ||
1130 | if (!constraints->min_uA || | |
1131 | constraints->min_uA != constraints->max_uA) { | |
1132 | ret = _regulator_get_current_limit(rdev); | |
1133 | if (ret > 0) | |
5751a99f SW |
1134 | count += scnprintf(buf + count, len - count, |
1135 | "at %d mA ", ret / 1000); | |
414c70cb | 1136 | } |
8f031b48 | 1137 | |
414c70cb | 1138 | if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) |
5751a99f | 1139 | count += scnprintf(buf + count, len - count, "fast "); |
414c70cb | 1140 | if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) |
5751a99f | 1141 | count += scnprintf(buf + count, len - count, "normal "); |
414c70cb | 1142 | if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) |
5751a99f | 1143 | count += scnprintf(buf + count, len - count, "idle "); |
414c70cb | 1144 | if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) |
99ad5f6e | 1145 | count += scnprintf(buf + count, len - count, "standby "); |
414c70cb | 1146 | |
215b8b05 | 1147 | if (!count) |
99ad5f6e MM |
1148 | count = scnprintf(buf, len, "no parameters"); |
1149 | else | |
1150 | --count; | |
1151 | ||
1152 | count += scnprintf(buf + count, len - count, ", %s", | |
1153 | _regulator_is_enabled(rdev) ? "enabled" : "disabled"); | |
215b8b05 | 1154 | |
194dbaef | 1155 | rdev_dbg(rdev, "%s\n", buf); |
c845f21a GU |
1156 | } |
1157 | #else /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */ | |
1158 | static inline void print_constraints_debug(struct regulator_dev *rdev) {} | |
1159 | #endif /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */ | |
1160 | ||
1161 | static void print_constraints(struct regulator_dev *rdev) | |
1162 | { | |
1163 | struct regulation_constraints *constraints = rdev->constraints; | |
1164 | ||
1165 | print_constraints_debug(rdev); | |
4a682922 MB |
1166 | |
1167 | if ((constraints->min_uV != constraints->max_uV) && | |
8a34e979 | 1168 | !regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) |
4a682922 MB |
1169 | rdev_warn(rdev, |
1170 | "Voltage range but no REGULATOR_CHANGE_VOLTAGE\n"); | |
414c70cb LG |
1171 | } |
1172 | ||
e79055d6 | 1173 | static int machine_constraints_voltage(struct regulator_dev *rdev, |
1083c393 | 1174 | struct regulation_constraints *constraints) |
a5766f11 | 1175 | { |
272e2315 | 1176 | const struct regulator_ops *ops = rdev->desc->ops; |
af5866c9 MB |
1177 | int ret; |
1178 | ||
1179 | /* do we need to apply the constraint voltage */ | |
1180 | if (rdev->constraints->apply_uV && | |
fa93fd4e MB |
1181 | rdev->constraints->min_uV && rdev->constraints->max_uV) { |
1182 | int target_min, target_max; | |
d22b85a1 | 1183 | int current_uV = regulator_get_voltage_rdev(rdev); |
84b3a7c9 DA |
1184 | |
1185 | if (current_uV == -ENOTRECOVERABLE) { | |
48f1b4ef | 1186 | /* This regulator can't be read and must be initialized */ |
84b3a7c9 DA |
1187 | rdev_info(rdev, "Setting %d-%duV\n", |
1188 | rdev->constraints->min_uV, | |
1189 | rdev->constraints->max_uV); | |
1190 | _regulator_do_set_voltage(rdev, | |
1191 | rdev->constraints->min_uV, | |
1192 | rdev->constraints->max_uV); | |
d22b85a1 | 1193 | current_uV = regulator_get_voltage_rdev(rdev); |
84b3a7c9 DA |
1194 | } |
1195 | ||
064d5cd1 | 1196 | if (current_uV < 0) { |
adea2831 BN |
1197 | if (current_uV != -EPROBE_DEFER) |
1198 | rdev_err(rdev, | |
1199 | "failed to get the current voltage: %pe\n", | |
1200 | ERR_PTR(current_uV)); | |
064d5cd1 AB |
1201 | return current_uV; |
1202 | } | |
fa93fd4e MB |
1203 | |
1204 | /* | |
1205 | * If we're below the minimum voltage move up to the | |
1206 | * minimum voltage, if we're above the maximum voltage | |
1207 | * then move down to the maximum. | |
1208 | */ | |
1209 | target_min = current_uV; | |
1210 | target_max = current_uV; | |
1211 | ||
1212 | if (current_uV < rdev->constraints->min_uV) { | |
1213 | target_min = rdev->constraints->min_uV; | |
1214 | target_max = rdev->constraints->min_uV; | |
1215 | } | |
1216 | ||
1217 | if (current_uV > rdev->constraints->max_uV) { | |
1218 | target_min = rdev->constraints->max_uV; | |
1219 | target_max = rdev->constraints->max_uV; | |
1220 | } | |
1221 | ||
1222 | if (target_min != current_uV || target_max != current_uV) { | |
45a91e8f MB |
1223 | rdev_info(rdev, "Bringing %duV into %d-%duV\n", |
1224 | current_uV, target_min, target_max); | |
064d5cd1 | 1225 | ret = _regulator_do_set_voltage( |
fa93fd4e | 1226 | rdev, target_min, target_max); |
064d5cd1 AB |
1227 | if (ret < 0) { |
1228 | rdev_err(rdev, | |
61aab5ad MM |
1229 | "failed to apply %d-%duV constraint: %pe\n", |
1230 | target_min, target_max, ERR_PTR(ret)); | |
064d5cd1 AB |
1231 | return ret; |
1232 | } | |
75790251 | 1233 | } |
af5866c9 | 1234 | } |
e06f5b4f | 1235 | |
4367cfdc DB |
1236 | /* constrain machine-level voltage specs to fit |
1237 | * the actual range supported by this regulator. | |
1238 | */ | |
1239 | if (ops->list_voltage && rdev->desc->n_voltages) { | |
1240 | int count = rdev->desc->n_voltages; | |
1241 | int i; | |
1242 | int min_uV = INT_MAX; | |
1243 | int max_uV = INT_MIN; | |
1244 | int cmin = constraints->min_uV; | |
1245 | int cmax = constraints->max_uV; | |
1246 | ||
3e590918 | 1247 | /* it's safe to autoconfigure fixed-voltage supplies |
69b8821e SK |
1248 | * and the constraints are used by list_voltage. |
1249 | */ | |
4367cfdc | 1250 | if (count == 1 && !cmin) { |
3e590918 | 1251 | cmin = 1; |
4367cfdc | 1252 | cmax = INT_MAX; |
3e590918 MB |
1253 | constraints->min_uV = cmin; |
1254 | constraints->max_uV = cmax; | |
4367cfdc DB |
1255 | } |
1256 | ||
3e2b9abd MB |
1257 | /* voltage constraints are optional */ |
1258 | if ((cmin == 0) && (cmax == 0)) | |
e79055d6 | 1259 | return 0; |
3e2b9abd | 1260 | |
4367cfdc | 1261 | /* else require explicit machine-level constraints */ |
3e2b9abd | 1262 | if (cmin <= 0 || cmax <= 0 || cmax < cmin) { |
5da84fd9 | 1263 | rdev_err(rdev, "invalid voltage constraints\n"); |
e79055d6 | 1264 | return -EINVAL; |
4367cfdc DB |
1265 | } |
1266 | ||
6d30fc51 CM |
1267 | /* no need to loop voltages if range is continuous */ |
1268 | if (rdev->desc->continuous_voltage_range) | |
1269 | return 0; | |
1270 | ||
4367cfdc DB |
1271 | /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ |
1272 | for (i = 0; i < count; i++) { | |
1273 | int value; | |
1274 | ||
1275 | value = ops->list_voltage(rdev, i); | |
1276 | if (value <= 0) | |
1277 | continue; | |
1278 | ||
1279 | /* maybe adjust [min_uV..max_uV] */ | |
1280 | if (value >= cmin && value < min_uV) | |
1281 | min_uV = value; | |
1282 | if (value <= cmax && value > max_uV) | |
1283 | max_uV = value; | |
1284 | } | |
1285 | ||
1286 | /* final: [min_uV..max_uV] valid iff constraints valid */ | |
1287 | if (max_uV < min_uV) { | |
fff15bef MB |
1288 | rdev_err(rdev, |
1289 | "unsupportable voltage constraints %u-%uuV\n", | |
1290 | min_uV, max_uV); | |
e79055d6 | 1291 | return -EINVAL; |
4367cfdc DB |
1292 | } |
1293 | ||
1294 | /* use regulator's subset of machine constraints */ | |
1295 | if (constraints->min_uV < min_uV) { | |
5da84fd9 JP |
1296 | rdev_dbg(rdev, "override min_uV, %d -> %d\n", |
1297 | constraints->min_uV, min_uV); | |
4367cfdc DB |
1298 | constraints->min_uV = min_uV; |
1299 | } | |
1300 | if (constraints->max_uV > max_uV) { | |
5da84fd9 JP |
1301 | rdev_dbg(rdev, "override max_uV, %d -> %d\n", |
1302 | constraints->max_uV, max_uV); | |
4367cfdc DB |
1303 | constraints->max_uV = max_uV; |
1304 | } | |
1305 | } | |
1306 | ||
e79055d6 MB |
1307 | return 0; |
1308 | } | |
1309 | ||
f8c1700d LD |
1310 | static int machine_constraints_current(struct regulator_dev *rdev, |
1311 | struct regulation_constraints *constraints) | |
1312 | { | |
272e2315 | 1313 | const struct regulator_ops *ops = rdev->desc->ops; |
f8c1700d LD |
1314 | int ret; |
1315 | ||
1316 | if (!constraints->min_uA && !constraints->max_uA) | |
1317 | return 0; | |
1318 | ||
1319 | if (constraints->min_uA > constraints->max_uA) { | |
1320 | rdev_err(rdev, "Invalid current constraints\n"); | |
1321 | return -EINVAL; | |
1322 | } | |
1323 | ||
1324 | if (!ops->set_current_limit || !ops->get_current_limit) { | |
1325 | rdev_warn(rdev, "Operation of current configuration missing\n"); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | /* Set regulator current in constraints range */ | |
1330 | ret = ops->set_current_limit(rdev, constraints->min_uA, | |
1331 | constraints->max_uA); | |
1332 | if (ret < 0) { | |
1333 | rdev_err(rdev, "Failed to set current constraint, %d\n", ret); | |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
30c21971 MP |
1340 | static int _regulator_do_enable(struct regulator_dev *rdev); |
1341 | ||
89a6a5e5 MV |
1342 | static int notif_set_limit(struct regulator_dev *rdev, |
1343 | int (*set)(struct regulator_dev *, int, int, bool), | |
1344 | int limit, int severity) | |
1345 | { | |
1346 | bool enable; | |
1347 | ||
1348 | if (limit == REGULATOR_NOTIF_LIMIT_DISABLE) { | |
1349 | enable = false; | |
1350 | limit = 0; | |
1351 | } else { | |
1352 | enable = true; | |
1353 | } | |
1354 | ||
1355 | if (limit == REGULATOR_NOTIF_LIMIT_ENABLE) | |
1356 | limit = 0; | |
1357 | ||
1358 | return set(rdev, limit, severity, enable); | |
1359 | } | |
1360 | ||
1361 | static int handle_notify_limits(struct regulator_dev *rdev, | |
1362 | int (*set)(struct regulator_dev *, int, int, bool), | |
1363 | struct notification_limit *limits) | |
1364 | { | |
1365 | int ret = 0; | |
1366 | ||
1367 | if (!set) | |
1368 | return -EOPNOTSUPP; | |
1369 | ||
1370 | if (limits->prot) | |
1371 | ret = notif_set_limit(rdev, set, limits->prot, | |
1372 | REGULATOR_SEVERITY_PROT); | |
1373 | if (ret) | |
1374 | return ret; | |
1375 | ||
1376 | if (limits->err) | |
1377 | ret = notif_set_limit(rdev, set, limits->err, | |
1378 | REGULATOR_SEVERITY_ERR); | |
1379 | if (ret) | |
1380 | return ret; | |
1381 | ||
1382 | if (limits->warn) | |
1383 | ret = notif_set_limit(rdev, set, limits->warn, | |
1384 | REGULATOR_SEVERITY_WARN); | |
1385 | ||
1386 | return ret; | |
1387 | } | |
e79055d6 MB |
1388 | /** |
1389 | * set_machine_constraints - sets regulator constraints | |
1390 | * @rdev: regulator source | |
e79055d6 MB |
1391 | * |
1392 | * Allows platform initialisation code to define and constrain | |
1393 | * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: | |
1394 | * Constraints *must* be set by platform code in order for some | |
1395 | * regulator operations to proceed i.e. set_voltage, set_current_limit, | |
1396 | * set_mode. | |
1397 | */ | |
57a6ad48 | 1398 | static int set_machine_constraints(struct regulator_dev *rdev) |
e79055d6 MB |
1399 | { |
1400 | int ret = 0; | |
272e2315 | 1401 | const struct regulator_ops *ops = rdev->desc->ops; |
e79055d6 | 1402 | |
f8c12fe3 | 1403 | ret = machine_constraints_voltage(rdev, rdev->constraints); |
e79055d6 | 1404 | if (ret != 0) |
6333ef46 | 1405 | return ret; |
e79055d6 | 1406 | |
f8c1700d | 1407 | ret = machine_constraints_current(rdev, rdev->constraints); |
e79055d6 | 1408 | if (ret != 0) |
6333ef46 | 1409 | return ret; |
e79055d6 | 1410 | |
36e4f839 SB |
1411 | if (rdev->constraints->ilim_uA && ops->set_input_current_limit) { |
1412 | ret = ops->set_input_current_limit(rdev, | |
1413 | rdev->constraints->ilim_uA); | |
1414 | if (ret < 0) { | |
61aab5ad | 1415 | rdev_err(rdev, "failed to set input limit: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1416 | return ret; |
36e4f839 SB |
1417 | } |
1418 | } | |
1419 | ||
a5766f11 | 1420 | /* do we need to setup our suspend state */ |
9a8f5e07 | 1421 | if (rdev->constraints->initial_state) { |
0955f5be | 1422 | ret = suspend_set_initial_state(rdev); |
e06f5b4f | 1423 | if (ret < 0) { |
61aab5ad | 1424 | rdev_err(rdev, "failed to set suspend state: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1425 | return ret; |
e06f5b4f MB |
1426 | } |
1427 | } | |
a5766f11 | 1428 | |
9a8f5e07 | 1429 | if (rdev->constraints->initial_mode) { |
a308466c | 1430 | if (!ops->set_mode) { |
5da84fd9 | 1431 | rdev_err(rdev, "no set_mode operation\n"); |
6333ef46 | 1432 | return -EINVAL; |
a308466c MB |
1433 | } |
1434 | ||
f8c12fe3 | 1435 | ret = ops->set_mode(rdev, rdev->constraints->initial_mode); |
a308466c | 1436 | if (ret < 0) { |
61aab5ad | 1437 | rdev_err(rdev, "failed to set initial mode: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1438 | return ret; |
a308466c | 1439 | } |
fa94e48e DA |
1440 | } else if (rdev->constraints->system_load) { |
1441 | /* | |
1442 | * We'll only apply the initial system load if an | |
1443 | * initial mode wasn't specified. | |
1444 | */ | |
1445 | drms_uA_update(rdev); | |
a308466c MB |
1446 | } |
1447 | ||
1653ccf4 YSB |
1448 | if ((rdev->constraints->ramp_delay || rdev->constraints->ramp_disable) |
1449 | && ops->set_ramp_delay) { | |
6f0b2c69 YSB |
1450 | ret = ops->set_ramp_delay(rdev, rdev->constraints->ramp_delay); |
1451 | if (ret < 0) { | |
61aab5ad | 1452 | rdev_err(rdev, "failed to set ramp_delay: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1453 | return ret; |
6f0b2c69 YSB |
1454 | } |
1455 | } | |
1456 | ||
23c779b9 SB |
1457 | if (rdev->constraints->pull_down && ops->set_pull_down) { |
1458 | ret = ops->set_pull_down(rdev); | |
1459 | if (ret < 0) { | |
61aab5ad | 1460 | rdev_err(rdev, "failed to set pull down: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1461 | return ret; |
23c779b9 SB |
1462 | } |
1463 | } | |
1464 | ||
57f66b78 SB |
1465 | if (rdev->constraints->soft_start && ops->set_soft_start) { |
1466 | ret = ops->set_soft_start(rdev); | |
1467 | if (ret < 0) { | |
61aab5ad | 1468 | rdev_err(rdev, "failed to set soft start: %pe\n", ERR_PTR(ret)); |
6333ef46 | 1469 | return ret; |
57f66b78 SB |
1470 | } |
1471 | } | |
1472 | ||
89a6a5e5 MV |
1473 | /* |
1474 | * Existing logic does not warn if over_current_protection is given as | |
1475 | * a constraint but driver does not support that. I think we should | |
1476 | * warn about this type of issues as it is possible someone changes | |
1477 | * PMIC on board to another type - and the another PMIC's driver does | |
1478 | * not support setting protection. Board composer may happily believe | |
1479 | * the DT limits are respected - especially if the new PMIC HW also | |
1480 | * supports protection but the driver does not. I won't change the logic | |
1481 | * without hearing more experienced opinion on this though. | |
1482 | * | |
1483 | * If warning is seen as a good idea then we can merge handling the | |
1484 | * over-curret protection and detection and get rid of this special | |
1485 | * handling. | |
1486 | */ | |
3a003bae SB |
1487 | if (rdev->constraints->over_current_protection |
1488 | && ops->set_over_current_protection) { | |
89a6a5e5 MV |
1489 | int lim = rdev->constraints->over_curr_limits.prot; |
1490 | ||
1491 | ret = ops->set_over_current_protection(rdev, lim, | |
1492 | REGULATOR_SEVERITY_PROT, | |
1493 | true); | |
3a003bae | 1494 | if (ret < 0) { |
61aab5ad MM |
1495 | rdev_err(rdev, "failed to set over current protection: %pe\n", |
1496 | ERR_PTR(ret)); | |
6333ef46 | 1497 | return ret; |
3a003bae SB |
1498 | } |
1499 | } | |
1500 | ||
89a6a5e5 MV |
1501 | if (rdev->constraints->over_current_detection) |
1502 | ret = handle_notify_limits(rdev, | |
1503 | ops->set_over_current_protection, | |
1504 | &rdev->constraints->over_curr_limits); | |
1505 | if (ret) { | |
1506 | if (ret != -EOPNOTSUPP) { | |
1507 | rdev_err(rdev, "failed to set over current limits: %pe\n", | |
1508 | ERR_PTR(ret)); | |
1509 | return ret; | |
1510 | } | |
1511 | rdev_warn(rdev, | |
1512 | "IC does not support requested over-current limits\n"); | |
1513 | } | |
1514 | ||
1515 | if (rdev->constraints->over_voltage_detection) | |
1516 | ret = handle_notify_limits(rdev, | |
1517 | ops->set_over_voltage_protection, | |
1518 | &rdev->constraints->over_voltage_limits); | |
1519 | if (ret) { | |
1520 | if (ret != -EOPNOTSUPP) { | |
1521 | rdev_err(rdev, "failed to set over voltage limits %pe\n", | |
1522 | ERR_PTR(ret)); | |
1523 | return ret; | |
1524 | } | |
1525 | rdev_warn(rdev, | |
1526 | "IC does not support requested over voltage limits\n"); | |
1527 | } | |
1528 | ||
1529 | if (rdev->constraints->under_voltage_detection) | |
1530 | ret = handle_notify_limits(rdev, | |
1531 | ops->set_under_voltage_protection, | |
1532 | &rdev->constraints->under_voltage_limits); | |
1533 | if (ret) { | |
1534 | if (ret != -EOPNOTSUPP) { | |
1535 | rdev_err(rdev, "failed to set under voltage limits %pe\n", | |
1536 | ERR_PTR(ret)); | |
1537 | return ret; | |
1538 | } | |
1539 | rdev_warn(rdev, | |
1540 | "IC does not support requested under voltage limits\n"); | |
1541 | } | |
1542 | ||
1543 | if (rdev->constraints->over_temp_detection) | |
1544 | ret = handle_notify_limits(rdev, | |
1545 | ops->set_thermal_protection, | |
1546 | &rdev->constraints->temp_limits); | |
1547 | if (ret) { | |
1548 | if (ret != -EOPNOTSUPP) { | |
1549 | rdev_err(rdev, "failed to set temperature limits %pe\n", | |
1550 | ERR_PTR(ret)); | |
1551 | return ret; | |
1552 | } | |
1553 | rdev_warn(rdev, | |
1554 | "IC does not support requested temperature limits\n"); | |
1555 | } | |
1556 | ||
670666b9 LD |
1557 | if (rdev->constraints->active_discharge && ops->set_active_discharge) { |
1558 | bool ad_state = (rdev->constraints->active_discharge == | |
1559 | REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false; | |
1560 | ||
1561 | ret = ops->set_active_discharge(rdev, ad_state); | |
1562 | if (ret < 0) { | |
61aab5ad | 1563 | rdev_err(rdev, "failed to set active discharge: %pe\n", ERR_PTR(ret)); |
670666b9 LD |
1564 | return ret; |
1565 | } | |
1566 | } | |
1567 | ||
261f0631 MB |
1568 | /* |
1569 | * If there is no mechanism for controlling the regulator then | |
1570 | * flag it as always_on so we don't end up duplicating checks | |
1571 | * for this so much. Note that we could control the state of | |
1572 | * a supply to control the output on a regulator that has no | |
1573 | * direct control. | |
1574 | */ | |
1575 | if (!rdev->ena_pin && !ops->enable) { | |
1576 | if (rdev->supply_name && !rdev->supply) | |
1577 | return -EPROBE_DEFER; | |
1578 | ||
1579 | if (rdev->supply) | |
1580 | rdev->constraints->always_on = | |
1581 | rdev->supply->rdev->constraints->always_on; | |
1582 | else | |
1583 | rdev->constraints->always_on = true; | |
1584 | } | |
1585 | ||
218320fe CK |
1586 | if (rdev->desc->off_on_delay) |
1587 | rdev->last_off = ktime_get(); | |
1588 | ||
2bb16663 OS |
1589 | /* If the constraints say the regulator should be on at this point |
1590 | * and we have control then make sure it is enabled. | |
1591 | */ | |
1592 | if (rdev->constraints->always_on || rdev->constraints->boot_on) { | |
98e48cd9 DB |
1593 | /* If we want to enable this regulator, make sure that we know |
1594 | * the supplying regulator. | |
1595 | */ | |
1596 | if (rdev->supply_name && !rdev->supply) | |
1597 | return -EPROBE_DEFER; | |
1598 | ||
05f224ca DA |
1599 | if (rdev->supply) { |
1600 | ret = regulator_enable(rdev->supply); | |
1601 | if (ret < 0) { | |
1602 | _regulator_put(rdev->supply); | |
1603 | rdev->supply = NULL; | |
1604 | return ret; | |
1605 | } | |
1606 | } | |
1607 | ||
2bb16663 OS |
1608 | ret = _regulator_do_enable(rdev); |
1609 | if (ret < 0 && ret != -EINVAL) { | |
61aab5ad | 1610 | rdev_err(rdev, "failed to enable: %pe\n", ERR_PTR(ret)); |
2bb16663 OS |
1611 | return ret; |
1612 | } | |
089b3f61 PP |
1613 | |
1614 | if (rdev->constraints->always_on) | |
1615 | rdev->use_count++; | |
2bb16663 OS |
1616 | } |
1617 | ||
a5766f11 | 1618 | print_constraints(rdev); |
1a6958e7 | 1619 | return 0; |
a5766f11 LG |
1620 | } |
1621 | ||
1622 | /** | |
1623 | * set_supply - set regulator supply regulator | |
69279fb9 MB |
1624 | * @rdev: regulator name |
1625 | * @supply_rdev: supply regulator name | |
a5766f11 LG |
1626 | * |
1627 | * Called by platform initialisation code to set the supply regulator for this | |
1628 | * regulator. This ensures that a regulators supply will also be enabled by the | |
1629 | * core if it's child is enabled. | |
1630 | */ | |
1631 | static int set_supply(struct regulator_dev *rdev, | |
3801b86a | 1632 | struct regulator_dev *supply_rdev) |
a5766f11 LG |
1633 | { |
1634 | int err; | |
1635 | ||
35d11469 | 1636 | rdev_dbg(rdev, "supplied by %s\n", rdev_get_name(supply_rdev)); |
3801b86a | 1637 | |
e2c09ae7 JMC |
1638 | if (!try_module_get(supply_rdev->owner)) |
1639 | return -ENODEV; | |
1640 | ||
3801b86a | 1641 | rdev->supply = create_regulator(supply_rdev, &rdev->dev, "SUPPLY"); |
32c78de8 AL |
1642 | if (rdev->supply == NULL) { |
1643 | err = -ENOMEM; | |
3801b86a | 1644 | return err; |
a5766f11 | 1645 | } |
57ad526a | 1646 | supply_rdev->open_count++; |
3801b86a MB |
1647 | |
1648 | return 0; | |
a5766f11 LG |
1649 | } |
1650 | ||
1651 | /** | |
06c63f93 | 1652 | * set_consumer_device_supply - Bind a regulator to a symbolic supply |
69279fb9 | 1653 | * @rdev: regulator source |
40f9244f | 1654 | * @consumer_dev_name: dev_name() string for device supply applies to |
69279fb9 | 1655 | * @supply: symbolic name for supply |
a5766f11 LG |
1656 | * |
1657 | * Allows platform initialisation code to map physical regulator | |
1658 | * sources to symbolic names for supplies for use by devices. Devices | |
1659 | * should use these symbolic names to request regulators, avoiding the | |
1660 | * need to provide board-specific regulator names as platform data. | |
1661 | */ | |
1662 | static int set_consumer_device_supply(struct regulator_dev *rdev, | |
737f360d MB |
1663 | const char *consumer_dev_name, |
1664 | const char *supply) | |
a5766f11 | 1665 | { |
5c065401 | 1666 | struct regulator_map *node, *new_node; |
9ed2099e | 1667 | int has_dev; |
a5766f11 LG |
1668 | |
1669 | if (supply == NULL) | |
1670 | return -EINVAL; | |
1671 | ||
9ed2099e MB |
1672 | if (consumer_dev_name != NULL) |
1673 | has_dev = 1; | |
1674 | else | |
1675 | has_dev = 0; | |
1676 | ||
5c065401 MM |
1677 | new_node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); |
1678 | if (new_node == NULL) | |
1679 | return -ENOMEM; | |
1680 | ||
1681 | new_node->regulator = rdev; | |
1682 | new_node->supply = supply; | |
1683 | ||
1684 | if (has_dev) { | |
1685 | new_node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); | |
1686 | if (new_node->dev_name == NULL) { | |
1687 | kfree(new_node); | |
1688 | return -ENOMEM; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | mutex_lock(®ulator_list_mutex); | |
6001e13c | 1693 | list_for_each_entry(node, ®ulator_map_list, list) { |
23b5cc2a JN |
1694 | if (node->dev_name && consumer_dev_name) { |
1695 | if (strcmp(node->dev_name, consumer_dev_name) != 0) | |
1696 | continue; | |
1697 | } else if (node->dev_name || consumer_dev_name) { | |
6001e13c | 1698 | continue; |
23b5cc2a JN |
1699 | } |
1700 | ||
6001e13c DB |
1701 | if (strcmp(node->supply, supply) != 0) |
1702 | continue; | |
1703 | ||
737f360d MB |
1704 | pr_debug("%s: %s/%s is '%s' supply; fail %s/%s\n", |
1705 | consumer_dev_name, | |
1706 | dev_name(&node->regulator->dev), | |
1707 | node->regulator->desc->name, | |
1708 | supply, | |
1709 | dev_name(&rdev->dev), rdev_get_name(rdev)); | |
5c065401 | 1710 | goto fail; |
6001e13c DB |
1711 | } |
1712 | ||
5c065401 MM |
1713 | list_add(&new_node->list, ®ulator_map_list); |
1714 | mutex_unlock(®ulator_list_mutex); | |
40f9244f | 1715 | |
a5766f11 | 1716 | return 0; |
5c065401 MM |
1717 | |
1718 | fail: | |
1719 | mutex_unlock(®ulator_list_mutex); | |
1720 | kfree(new_node->dev_name); | |
1721 | kfree(new_node); | |
1722 | return -EBUSY; | |
a5766f11 LG |
1723 | } |
1724 | ||
0f1d747b MR |
1725 | static void unset_regulator_supplies(struct regulator_dev *rdev) |
1726 | { | |
1727 | struct regulator_map *node, *n; | |
1728 | ||
1729 | list_for_each_entry_safe(node, n, ®ulator_map_list, list) { | |
1730 | if (rdev == node->regulator) { | |
1731 | list_del(&node->list); | |
40f9244f | 1732 | kfree(node->dev_name); |
0f1d747b | 1733 | kfree(node); |
0f1d747b MR |
1734 | } |
1735 | } | |
1736 | } | |
1737 | ||
2d80a91b RF |
1738 | #ifdef CONFIG_DEBUG_FS |
1739 | static ssize_t constraint_flags_read_file(struct file *file, | |
1740 | char __user *user_buf, | |
1741 | size_t count, loff_t *ppos) | |
1742 | { | |
1743 | const struct regulator *regulator = file->private_data; | |
1744 | const struct regulation_constraints *c = regulator->rdev->constraints; | |
1745 | char *buf; | |
1746 | ssize_t ret; | |
1747 | ||
1748 | if (!c) | |
1749 | return 0; | |
1750 | ||
1751 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
1752 | if (!buf) | |
1753 | return -ENOMEM; | |
1754 | ||
1755 | ret = snprintf(buf, PAGE_SIZE, | |
1756 | "always_on: %u\n" | |
1757 | "boot_on: %u\n" | |
1758 | "apply_uV: %u\n" | |
1759 | "ramp_disable: %u\n" | |
1760 | "soft_start: %u\n" | |
1761 | "pull_down: %u\n" | |
1762 | "over_current_protection: %u\n", | |
1763 | c->always_on, | |
1764 | c->boot_on, | |
1765 | c->apply_uV, | |
1766 | c->ramp_disable, | |
1767 | c->soft_start, | |
1768 | c->pull_down, | |
1769 | c->over_current_protection); | |
1770 | ||
1771 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); | |
1772 | kfree(buf); | |
1773 | ||
1774 | return ret; | |
1775 | } | |
1776 | ||
1777 | #endif | |
1778 | ||
1779 | static const struct file_operations constraint_flags_fops = { | |
1780 | #ifdef CONFIG_DEBUG_FS | |
1781 | .open = simple_open, | |
1782 | .read = constraint_flags_read_file, | |
1783 | .llseek = default_llseek, | |
1784 | #endif | |
1785 | }; | |
1786 | ||
f5726ae3 | 1787 | #define REG_STR_SIZE 64 |
414c70cb LG |
1788 | |
1789 | static struct regulator *create_regulator(struct regulator_dev *rdev, | |
1790 | struct device *dev, | |
1791 | const char *supply_name) | |
1792 | { | |
1793 | struct regulator *regulator; | |
dbe954d8 | 1794 | int err = 0; |
87fe29b6 MM |
1795 | |
1796 | if (dev) { | |
1797 | char buf[REG_STR_SIZE]; | |
1798 | int size; | |
1799 | ||
1800 | size = snprintf(buf, REG_STR_SIZE, "%s-%s", | |
1801 | dev->kobj.name, supply_name); | |
1802 | if (size >= REG_STR_SIZE) | |
1803 | return NULL; | |
1804 | ||
1805 | supply_name = kstrdup(buf, GFP_KERNEL); | |
1806 | if (supply_name == NULL) | |
1807 | return NULL; | |
1808 | } else { | |
1809 | supply_name = kstrdup_const(supply_name, GFP_KERNEL); | |
1810 | if (supply_name == NULL) | |
1811 | return NULL; | |
1812 | } | |
414c70cb LG |
1813 | |
1814 | regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); | |
87fe29b6 MM |
1815 | if (regulator == NULL) { |
1816 | kfree(supply_name); | |
414c70cb | 1817 | return NULL; |
87fe29b6 | 1818 | } |
414c70cb | 1819 | |
414c70cb | 1820 | regulator->rdev = rdev; |
87fe29b6 MM |
1821 | regulator->supply_name = supply_name; |
1822 | ||
1823 | regulator_lock(rdev); | |
414c70cb | 1824 | list_add(®ulator->list, &rdev->consumer_list); |
87fe29b6 | 1825 | regulator_unlock(rdev); |
414c70cb LG |
1826 | |
1827 | if (dev) { | |
e2c98eaf SG |
1828 | regulator->dev = dev; |
1829 | ||
222cc7b1 | 1830 | /* Add a link to the device sysfs entry */ |
ff268b56 | 1831 | err = sysfs_create_link_nowarn(&rdev->dev.kobj, &dev->kobj, |
87fe29b6 | 1832 | supply_name); |
414c70cb | 1833 | if (err) { |
61aab5ad MM |
1834 | rdev_dbg(rdev, "could not add device link %s: %pe\n", |
1835 | dev->kobj.name, ERR_PTR(err)); | |
222cc7b1 | 1836 | /* non-fatal */ |
414c70cb | 1837 | } |
5de70519 MB |
1838 | } |
1839 | ||
dbe954d8 HG |
1840 | if (err != -EEXIST) |
1841 | regulator->debugfs = debugfs_create_dir(supply_name, rdev->debugfs); | |
24751434 | 1842 | if (!regulator->debugfs) { |
ad3a942b | 1843 | rdev_dbg(rdev, "Failed to create debugfs directory\n"); |
5de70519 MB |
1844 | } else { |
1845 | debugfs_create_u32("uA_load", 0444, regulator->debugfs, | |
1846 | ®ulator->uA_load); | |
1847 | debugfs_create_u32("min_uV", 0444, regulator->debugfs, | |
c360a6df | 1848 | ®ulator->voltage[PM_SUSPEND_ON].min_uV); |
5de70519 | 1849 | debugfs_create_u32("max_uV", 0444, regulator->debugfs, |
c360a6df | 1850 | ®ulator->voltage[PM_SUSPEND_ON].max_uV); |
2d80a91b RF |
1851 | debugfs_create_file("constraint_flags", 0444, |
1852 | regulator->debugfs, regulator, | |
1853 | &constraint_flags_fops); | |
414c70cb | 1854 | } |
5de70519 | 1855 | |
6492bc1b MB |
1856 | /* |
1857 | * Check now if the regulator is an always on regulator - if | |
1858 | * it is then we don't need to do nearly so much work for | |
1859 | * enable/disable calls. | |
1860 | */ | |
8a34e979 | 1861 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS) && |
6492bc1b MB |
1862 | _regulator_is_enabled(rdev)) |
1863 | regulator->always_on = true; | |
1864 | ||
414c70cb | 1865 | return regulator; |
414c70cb LG |
1866 | } |
1867 | ||
31aae2be MB |
1868 | static int _regulator_get_enable_time(struct regulator_dev *rdev) |
1869 | { | |
00c877c6 LD |
1870 | if (rdev->constraints && rdev->constraints->enable_time) |
1871 | return rdev->constraints->enable_time; | |
68ce3a44 AL |
1872 | if (rdev->desc->ops->enable_time) |
1873 | return rdev->desc->ops->enable_time(rdev); | |
1874 | return rdev->desc->enable_time; | |
31aae2be MB |
1875 | } |
1876 | ||
a06ccd9c CK |
1877 | static struct regulator_supply_alias *regulator_find_supply_alias( |
1878 | struct device *dev, const char *supply) | |
1879 | { | |
1880 | struct regulator_supply_alias *map; | |
1881 | ||
1882 | list_for_each_entry(map, ®ulator_supply_alias_list, list) | |
1883 | if (map->src_dev == dev && strcmp(map->src_supply, supply) == 0) | |
1884 | return map; | |
1885 | ||
1886 | return NULL; | |
1887 | } | |
1888 | ||
1889 | static void regulator_supply_alias(struct device **dev, const char **supply) | |
1890 | { | |
1891 | struct regulator_supply_alias *map; | |
1892 | ||
1893 | map = regulator_find_supply_alias(*dev, *supply); | |
1894 | if (map) { | |
1895 | dev_dbg(*dev, "Mapping supply %s to %s,%s\n", | |
1896 | *supply, map->alias_supply, | |
1897 | dev_name(map->alias_dev)); | |
1898 | *dev = map->alias_dev; | |
1899 | *supply = map->alias_supply; | |
1900 | } | |
1901 | } | |
1902 | ||
85f3b431 TV |
1903 | static int regulator_match(struct device *dev, const void *data) |
1904 | { | |
1905 | struct regulator_dev *r = dev_to_rdev(dev); | |
1906 | ||
1907 | return strcmp(rdev_get_name(r), data) == 0; | |
1908 | } | |
1909 | ||
1910 | static struct regulator_dev *regulator_lookup_by_name(const char *name) | |
1911 | { | |
1912 | struct device *dev; | |
1913 | ||
1914 | dev = class_find_device(®ulator_class, NULL, name, regulator_match); | |
1915 | ||
1916 | return dev ? dev_to_rdev(dev) : NULL; | |
1917 | } | |
1918 | ||
1919 | /** | |
1920 | * regulator_dev_lookup - lookup a regulator device. | |
1921 | * @dev: device for regulator "consumer". | |
1922 | * @supply: Supply name or regulator ID. | |
85f3b431 TV |
1923 | * |
1924 | * If successful, returns a struct regulator_dev that corresponds to the name | |
163478da DT |
1925 | * @supply and with the embedded struct device refcount incremented by one. |
1926 | * The refcount must be dropped by calling put_device(). | |
1927 | * On failure one of the following ERR-PTR-encoded values is returned: | |
1928 | * -ENODEV if lookup fails permanently, -EPROBE_DEFER if lookup could succeed | |
1929 | * in the future. | |
85f3b431 | 1930 | */ |
69511a45 | 1931 | static struct regulator_dev *regulator_dev_lookup(struct device *dev, |
163478da | 1932 | const char *supply) |
69511a45 | 1933 | { |
06217197 | 1934 | struct regulator_dev *r = NULL; |
69511a45 | 1935 | struct device_node *node; |
576ca436 MB |
1936 | struct regulator_map *map; |
1937 | const char *devname = NULL; | |
69511a45 | 1938 | |
a06ccd9c CK |
1939 | regulator_supply_alias(&dev, &supply); |
1940 | ||
69511a45 RN |
1941 | /* first do a dt based lookup */ |
1942 | if (dev && dev->of_node) { | |
1943 | node = of_get_regulator(dev, supply); | |
6d191a5f | 1944 | if (node) { |
85f3b431 TV |
1945 | r = of_find_regulator_by_node(node); |
1946 | if (r) | |
1947 | return r; | |
163478da | 1948 | |
6d191a5f | 1949 | /* |
163478da DT |
1950 | * We have a node, but there is no device. |
1951 | * assume it has not registered yet. | |
6d191a5f | 1952 | */ |
163478da | 1953 | return ERR_PTR(-EPROBE_DEFER); |
6d191a5f | 1954 | } |
69511a45 RN |
1955 | } |
1956 | ||
1957 | /* if not found, try doing it non-dt way */ | |
576ca436 MB |
1958 | if (dev) |
1959 | devname = dev_name(dev); | |
1960 | ||
85f3b431 | 1961 | mutex_lock(®ulator_list_mutex); |
576ca436 MB |
1962 | list_for_each_entry(map, ®ulator_map_list, list) { |
1963 | /* If the mapping has a device set up it must match */ | |
1964 | if (map->dev_name && | |
1965 | (!devname || strcmp(map->dev_name, devname))) | |
1966 | continue; | |
1967 | ||
85f3b431 TV |
1968 | if (strcmp(map->supply, supply) == 0 && |
1969 | get_device(&map->regulator->dev)) { | |
163478da DT |
1970 | r = map->regulator; |
1971 | break; | |
85f3b431 | 1972 | } |
576ca436 | 1973 | } |
85f3b431 | 1974 | mutex_unlock(®ulator_list_mutex); |
576ca436 | 1975 | |
06217197 CK |
1976 | if (r) |
1977 | return r; | |
1978 | ||
1979 | r = regulator_lookup_by_name(supply); | |
163478da DT |
1980 | if (r) |
1981 | return r; | |
1982 | ||
1983 | return ERR_PTR(-ENODEV); | |
69511a45 RN |
1984 | } |
1985 | ||
6261b06d BA |
1986 | static int regulator_resolve_supply(struct regulator_dev *rdev) |
1987 | { | |
1988 | struct regulator_dev *r; | |
1989 | struct device *dev = rdev->dev.parent; | |
eaa7995c | 1990 | int ret = 0; |
6261b06d | 1991 | |
48f1b4ef | 1992 | /* No supply to resolve? */ |
6261b06d BA |
1993 | if (!rdev->supply_name) |
1994 | return 0; | |
1995 | ||
eaa7995c | 1996 | /* Supply already resolved? (fast-path without locking contention) */ |
6261b06d BA |
1997 | if (rdev->supply) |
1998 | return 0; | |
1999 | ||
163478da DT |
2000 | r = regulator_dev_lookup(dev, rdev->supply_name); |
2001 | if (IS_ERR(r)) { | |
2002 | ret = PTR_ERR(r); | |
2003 | ||
06423121 MB |
2004 | /* Did the lookup explicitly defer for us? */ |
2005 | if (ret == -EPROBE_DEFER) | |
eaa7995c | 2006 | goto out; |
06423121 | 2007 | |
9f7e25ed MB |
2008 | if (have_full_constraints()) { |
2009 | r = dummy_regulator_rdev; | |
85f3b431 | 2010 | get_device(&r->dev); |
9f7e25ed MB |
2011 | } else { |
2012 | dev_err(dev, "Failed to resolve %s-supply for %s\n", | |
2013 | rdev->supply_name, rdev->desc->name); | |
eaa7995c DC |
2014 | ret = -EPROBE_DEFER; |
2015 | goto out; | |
9f7e25ed | 2016 | } |
6261b06d BA |
2017 | } |
2018 | ||
4b639e25 MM |
2019 | if (r == rdev) { |
2020 | dev_err(dev, "Supply for %s (%s) resolved to itself\n", | |
2021 | rdev->desc->name, rdev->supply_name); | |
eaa7995c DC |
2022 | if (!have_full_constraints()) { |
2023 | ret = -EINVAL; | |
2024 | goto out; | |
2025 | } | |
f5c042b2 MM |
2026 | r = dummy_regulator_rdev; |
2027 | get_device(&r->dev); | |
4b639e25 MM |
2028 | } |
2029 | ||
66d228a2 JH |
2030 | /* |
2031 | * If the supply's parent device is not the same as the | |
2032 | * regulator's parent device, then ensure the parent device | |
2033 | * is bound before we resolve the supply, in case the parent | |
2034 | * device get probe deferred and unregisters the supply. | |
2035 | */ | |
2036 | if (r->dev.parent && r->dev.parent != rdev->dev.parent) { | |
2037 | if (!device_is_bound(r->dev.parent)) { | |
2038 | put_device(&r->dev); | |
eaa7995c DC |
2039 | ret = -EPROBE_DEFER; |
2040 | goto out; | |
66d228a2 JH |
2041 | } |
2042 | } | |
2043 | ||
6261b06d BA |
2044 | /* Recursively resolve the supply of the supply */ |
2045 | ret = regulator_resolve_supply(r); | |
85f3b431 TV |
2046 | if (ret < 0) { |
2047 | put_device(&r->dev); | |
eaa7995c | 2048 | goto out; |
85f3b431 | 2049 | } |
6261b06d | 2050 | |
14a71d50 MB |
2051 | /* |
2052 | * Recheck rdev->supply with rdev->mutex lock held to avoid a race | |
2053 | * between rdev->supply null check and setting rdev->supply in | |
2054 | * set_supply() from concurrent tasks. | |
2055 | */ | |
2056 | regulator_lock(rdev); | |
2057 | ||
2058 | /* Supply just resolved by a concurrent task? */ | |
2059 | if (rdev->supply) { | |
2060 | regulator_unlock(rdev); | |
2061 | put_device(&r->dev); | |
2062 | goto out; | |
2063 | } | |
2064 | ||
6261b06d | 2065 | ret = set_supply(rdev, r); |
85f3b431 | 2066 | if (ret < 0) { |
14a71d50 | 2067 | regulator_unlock(rdev); |
85f3b431 | 2068 | put_device(&r->dev); |
eaa7995c | 2069 | goto out; |
85f3b431 | 2070 | } |
6261b06d | 2071 | |
14a71d50 MB |
2072 | regulator_unlock(rdev); |
2073 | ||
05f224ca DA |
2074 | /* |
2075 | * In set_machine_constraints() we may have turned this regulator on | |
2076 | * but we couldn't propagate to the supply if it hadn't been resolved | |
2077 | * yet. Do it now. | |
2078 | */ | |
2079 | if (rdev->use_count) { | |
6261b06d | 2080 | ret = regulator_enable(rdev->supply); |
36a1f1b6 | 2081 | if (ret < 0) { |
9f8df6ad | 2082 | _regulator_put(rdev->supply); |
8e5356a7 | 2083 | rdev->supply = NULL; |
eaa7995c | 2084 | goto out; |
36a1f1b6 | 2085 | } |
6261b06d BA |
2086 | } |
2087 | ||
eaa7995c | 2088 | out: |
eaa7995c | 2089 | return ret; |
6261b06d BA |
2090 | } |
2091 | ||
5ffbd136 | 2092 | /* Internal regulator request function */ |
a8bd42a9 DT |
2093 | struct regulator *_regulator_get(struct device *dev, const char *id, |
2094 | enum regulator_get_type get_type) | |
414c70cb LG |
2095 | { |
2096 | struct regulator_dev *rdev; | |
7d245afa | 2097 | struct regulator *regulator; |
b59b6544 | 2098 | struct device_link *link; |
317b5684 | 2099 | int ret; |
414c70cb | 2100 | |
a8bd42a9 DT |
2101 | if (get_type >= MAX_GET_TYPE) { |
2102 | dev_err(dev, "invalid type %d in %s\n", get_type, __func__); | |
2103 | return ERR_PTR(-EINVAL); | |
2104 | } | |
2105 | ||
414c70cb | 2106 | if (id == NULL) { |
5da84fd9 | 2107 | pr_err("get() with no identifier\n"); |
043c998f | 2108 | return ERR_PTR(-EINVAL); |
414c70cb LG |
2109 | } |
2110 | ||
163478da | 2111 | rdev = regulator_dev_lookup(dev, id); |
a4d7641f DT |
2112 | if (IS_ERR(rdev)) { |
2113 | ret = PTR_ERR(rdev); | |
1e4b545c | 2114 | |
a4d7641f DT |
2115 | /* |
2116 | * If regulator_dev_lookup() fails with error other | |
2117 | * than -ENODEV our job here is done, we simply return it. | |
2118 | */ | |
2119 | if (ret != -ENODEV) | |
2120 | return ERR_PTR(ret); | |
34abbd68 | 2121 | |
a4d7641f DT |
2122 | if (!have_full_constraints()) { |
2123 | dev_warn(dev, | |
2124 | "incomplete constraints, dummy supplies not allowed\n"); | |
2125 | return ERR_PTR(-ENODEV); | |
2126 | } | |
4ddfebd3 | 2127 | |
a4d7641f DT |
2128 | switch (get_type) { |
2129 | case NORMAL_GET: | |
2130 | /* | |
2131 | * Assume that a regulator is physically present and | |
2132 | * enabled, even if it isn't hooked up, and just | |
2133 | * provide a dummy. | |
2134 | */ | |
6e5505cf | 2135 | dev_warn(dev, "supply %s not found, using dummy regulator\n", id); |
a4d7641f DT |
2136 | rdev = dummy_regulator_rdev; |
2137 | get_device(&rdev->dev); | |
2138 | break; | |
34abbd68 | 2139 | |
a4d7641f DT |
2140 | case EXCLUSIVE_GET: |
2141 | dev_warn(dev, | |
2142 | "dummy supplies not allowed for exclusive requests\n"); | |
df561f66 | 2143 | fallthrough; |
34abbd68 | 2144 | |
a4d7641f DT |
2145 | default: |
2146 | return ERR_PTR(-ENODEV); | |
2147 | } | |
34abbd68 | 2148 | } |
34abbd68 | 2149 | |
5ffbd136 MB |
2150 | if (rdev->exclusive) { |
2151 | regulator = ERR_PTR(-EPERM); | |
85f3b431 TV |
2152 | put_device(&rdev->dev); |
2153 | return regulator; | |
5ffbd136 MB |
2154 | } |
2155 | ||
a8bd42a9 | 2156 | if (get_type == EXCLUSIVE_GET && rdev->open_count) { |
5ffbd136 | 2157 | regulator = ERR_PTR(-EBUSY); |
85f3b431 TV |
2158 | put_device(&rdev->dev); |
2159 | return regulator; | |
5ffbd136 MB |
2160 | } |
2161 | ||
79d6f049 DO |
2162 | mutex_lock(®ulator_list_mutex); |
2163 | ret = (rdev->coupling_desc.n_resolved != rdev->coupling_desc.n_coupled); | |
2164 | mutex_unlock(®ulator_list_mutex); | |
2165 | ||
2166 | if (ret != 0) { | |
2167 | regulator = ERR_PTR(-EPROBE_DEFER); | |
2168 | put_device(&rdev->dev); | |
2169 | return regulator; | |
2170 | } | |
2171 | ||
6261b06d BA |
2172 | ret = regulator_resolve_supply(rdev); |
2173 | if (ret < 0) { | |
2174 | regulator = ERR_PTR(ret); | |
85f3b431 TV |
2175 | put_device(&rdev->dev); |
2176 | return regulator; | |
6261b06d BA |
2177 | } |
2178 | ||
85f3b431 | 2179 | if (!try_module_get(rdev->owner)) { |
7d245afa | 2180 | regulator = ERR_PTR(-EPROBE_DEFER); |
85f3b431 TV |
2181 | put_device(&rdev->dev); |
2182 | return regulator; | |
2183 | } | |
a5766f11 | 2184 | |
414c70cb LG |
2185 | regulator = create_regulator(rdev, dev, id); |
2186 | if (regulator == NULL) { | |
2187 | regulator = ERR_PTR(-ENOMEM); | |
2188 | module_put(rdev->owner); | |
4affd79a | 2189 | put_device(&rdev->dev); |
85f3b431 | 2190 | return regulator; |
414c70cb LG |
2191 | } |
2192 | ||
5ffbd136 | 2193 | rdev->open_count++; |
a8bd42a9 | 2194 | if (get_type == EXCLUSIVE_GET) { |
5ffbd136 MB |
2195 | rdev->exclusive = 1; |
2196 | ||
2197 | ret = _regulator_is_enabled(rdev); | |
c3e3ca05 | 2198 | if (ret > 0) { |
5ffbd136 | 2199 | rdev->use_count = 1; |
c3e3ca05 ZW |
2200 | regulator->enable_count = 1; |
2201 | } else { | |
5ffbd136 | 2202 | rdev->use_count = 0; |
c3e3ca05 ZW |
2203 | regulator->enable_count = 0; |
2204 | } | |
5ffbd136 MB |
2205 | } |
2206 | ||
b59b6544 SK |
2207 | link = device_link_add(dev, &rdev->dev, DL_FLAG_STATELESS); |
2208 | if (!IS_ERR_OR_NULL(link)) | |
2209 | regulator->device_link = true; | |
ed1ae2dd | 2210 | |
414c70cb LG |
2211 | return regulator; |
2212 | } | |
5ffbd136 MB |
2213 | |
2214 | /** | |
2215 | * regulator_get - lookup and obtain a reference to a regulator. | |
2216 | * @dev: device for regulator "consumer" | |
2217 | * @id: Supply name or regulator ID. | |
2218 | * | |
2219 | * Returns a struct regulator corresponding to the regulator producer, | |
2220 | * or IS_ERR() condition containing errno. | |
2221 | * | |
90cf443d | 2222 | * Use of supply names configured via set_consumer_device_supply() is |
5ffbd136 MB |
2223 | * strongly encouraged. It is recommended that the supply name used |
2224 | * should match the name used for the supply and/or the relevant | |
2225 | * device pins in the datasheet. | |
2226 | */ | |
2227 | struct regulator *regulator_get(struct device *dev, const char *id) | |
2228 | { | |
a8bd42a9 | 2229 | return _regulator_get(dev, id, NORMAL_GET); |
5ffbd136 | 2230 | } |
414c70cb LG |
2231 | EXPORT_SYMBOL_GPL(regulator_get); |
2232 | ||
5ffbd136 MB |
2233 | /** |
2234 | * regulator_get_exclusive - obtain exclusive access to a regulator. | |
2235 | * @dev: device for regulator "consumer" | |
2236 | * @id: Supply name or regulator ID. | |
2237 | * | |
2238 | * Returns a struct regulator corresponding to the regulator producer, | |
2239 | * or IS_ERR() condition containing errno. Other consumers will be | |
69c3f723 SB |
2240 | * unable to obtain this regulator while this reference is held and the |
2241 | * use count for the regulator will be initialised to reflect the current | |
2242 | * state of the regulator. | |
5ffbd136 MB |
2243 | * |
2244 | * This is intended for use by consumers which cannot tolerate shared | |
2245 | * use of the regulator such as those which need to force the | |
2246 | * regulator off for correct operation of the hardware they are | |
2247 | * controlling. | |
2248 | * | |
90cf443d | 2249 | * Use of supply names configured via set_consumer_device_supply() is |
5ffbd136 MB |
2250 | * strongly encouraged. It is recommended that the supply name used |
2251 | * should match the name used for the supply and/or the relevant | |
2252 | * device pins in the datasheet. | |
2253 | */ | |
2254 | struct regulator *regulator_get_exclusive(struct device *dev, const char *id) | |
2255 | { | |
a8bd42a9 | 2256 | return _regulator_get(dev, id, EXCLUSIVE_GET); |
5ffbd136 MB |
2257 | } |
2258 | EXPORT_SYMBOL_GPL(regulator_get_exclusive); | |
2259 | ||
de1dd9fd MB |
2260 | /** |
2261 | * regulator_get_optional - obtain optional access to a regulator. | |
2262 | * @dev: device for regulator "consumer" | |
2263 | * @id: Supply name or regulator ID. | |
2264 | * | |
2265 | * Returns a struct regulator corresponding to the regulator producer, | |
69c3f723 | 2266 | * or IS_ERR() condition containing errno. |
de1dd9fd MB |
2267 | * |
2268 | * This is intended for use by consumers for devices which can have | |
2269 | * some supplies unconnected in normal use, such as some MMC devices. | |
2270 | * It can allow the regulator core to provide stub supplies for other | |
2271 | * supplies requested using normal regulator_get() calls without | |
2272 | * disrupting the operation of drivers that can handle absent | |
2273 | * supplies. | |
2274 | * | |
90cf443d | 2275 | * Use of supply names configured via set_consumer_device_supply() is |
de1dd9fd MB |
2276 | * strongly encouraged. It is recommended that the supply name used |
2277 | * should match the name used for the supply and/or the relevant | |
2278 | * device pins in the datasheet. | |
2279 | */ | |
2280 | struct regulator *regulator_get_optional(struct device *dev, const char *id) | |
2281 | { | |
a8bd42a9 | 2282 | return _regulator_get(dev, id, OPTIONAL_GET); |
de1dd9fd MB |
2283 | } |
2284 | EXPORT_SYMBOL_GPL(regulator_get_optional); | |
2285 | ||
e1794aa4 | 2286 | static void destroy_regulator(struct regulator *regulator) |
414c70cb | 2287 | { |
e1794aa4 | 2288 | struct regulator_dev *rdev = regulator->rdev; |
414c70cb | 2289 | |
5de70519 | 2290 | debugfs_remove_recursive(regulator->debugfs); |
5de70519 | 2291 | |
ed1ae2dd | 2292 | if (regulator->dev) { |
b59b6544 SK |
2293 | if (regulator->device_link) |
2294 | device_link_remove(regulator->dev, &rdev->dev); | |
ed1ae2dd | 2295 | |
2296 | /* remove any sysfs entries */ | |
414c70cb | 2297 | sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); |
ed1ae2dd | 2298 | } |
2299 | ||
66cf9a7e | 2300 | regulator_lock(rdev); |
414c70cb | 2301 | list_del(®ulator->list); |
414c70cb | 2302 | |
5ffbd136 MB |
2303 | rdev->open_count--; |
2304 | rdev->exclusive = 0; | |
66cf9a7e | 2305 | regulator_unlock(rdev); |
5ffbd136 | 2306 | |
0630b614 | 2307 | kfree_const(regulator->supply_name); |
1768514e | 2308 | kfree(regulator); |
e1794aa4 SK |
2309 | } |
2310 | ||
2311 | /* regulator_list_mutex lock held by regulator_put() */ | |
2312 | static void _regulator_put(struct regulator *regulator) | |
2313 | { | |
2314 | struct regulator_dev *rdev; | |
2315 | ||
2316 | if (IS_ERR_OR_NULL(regulator)) | |
2317 | return; | |
2318 | ||
2319 | lockdep_assert_held_once(®ulator_list_mutex); | |
2320 | ||
2321 | /* Docs say you must disable before calling regulator_put() */ | |
2322 | WARN_ON(regulator->enable_count); | |
2323 | ||
2324 | rdev = regulator->rdev; | |
2325 | ||
2326 | destroy_regulator(regulator); | |
1768514e | 2327 | |
414c70cb | 2328 | module_put(rdev->owner); |
4affd79a | 2329 | put_device(&rdev->dev); |
23ff2f0f CK |
2330 | } |
2331 | ||
2332 | /** | |
2333 | * regulator_put - "free" the regulator source | |
2334 | * @regulator: regulator source | |
2335 | * | |
2336 | * Note: drivers must ensure that all regulator_enable calls made on this | |
2337 | * regulator source are balanced by regulator_disable calls prior to calling | |
2338 | * this function. | |
2339 | */ | |
2340 | void regulator_put(struct regulator *regulator) | |
2341 | { | |
2342 | mutex_lock(®ulator_list_mutex); | |
2343 | _regulator_put(regulator); | |
414c70cb LG |
2344 | mutex_unlock(®ulator_list_mutex); |
2345 | } | |
2346 | EXPORT_SYMBOL_GPL(regulator_put); | |
2347 | ||
a06ccd9c CK |
2348 | /** |
2349 | * regulator_register_supply_alias - Provide device alias for supply lookup | |
2350 | * | |
2351 | * @dev: device that will be given as the regulator "consumer" | |
2352 | * @id: Supply name or regulator ID | |
2353 | * @alias_dev: device that should be used to lookup the supply | |
2354 | * @alias_id: Supply name or regulator ID that should be used to lookup the | |
2355 | * supply | |
2356 | * | |
2357 | * All lookups for id on dev will instead be conducted for alias_id on | |
2358 | * alias_dev. | |
2359 | */ | |
2360 | int regulator_register_supply_alias(struct device *dev, const char *id, | |
2361 | struct device *alias_dev, | |
2362 | const char *alias_id) | |
2363 | { | |
2364 | struct regulator_supply_alias *map; | |
2365 | ||
2366 | map = regulator_find_supply_alias(dev, id); | |
2367 | if (map) | |
2368 | return -EEXIST; | |
2369 | ||
2370 | map = kzalloc(sizeof(struct regulator_supply_alias), GFP_KERNEL); | |
2371 | if (!map) | |
2372 | return -ENOMEM; | |
2373 | ||
2374 | map->src_dev = dev; | |
2375 | map->src_supply = id; | |
2376 | map->alias_dev = alias_dev; | |
2377 | map->alias_supply = alias_id; | |
2378 | ||
2379 | list_add(&map->list, ®ulator_supply_alias_list); | |
2380 | ||
2381 | pr_info("Adding alias for supply %s,%s -> %s,%s\n", | |
2382 | id, dev_name(dev), alias_id, dev_name(alias_dev)); | |
2383 | ||
2384 | return 0; | |
2385 | } | |
2386 | EXPORT_SYMBOL_GPL(regulator_register_supply_alias); | |
2387 | ||
2388 | /** | |
2389 | * regulator_unregister_supply_alias - Remove device alias | |
2390 | * | |
2391 | * @dev: device that will be given as the regulator "consumer" | |
2392 | * @id: Supply name or regulator ID | |
2393 | * | |
2394 | * Remove a lookup alias if one exists for id on dev. | |
2395 | */ | |
2396 | void regulator_unregister_supply_alias(struct device *dev, const char *id) | |
2397 | { | |
2398 | struct regulator_supply_alias *map; | |
2399 | ||
2400 | map = regulator_find_supply_alias(dev, id); | |
2401 | if (map) { | |
2402 | list_del(&map->list); | |
2403 | kfree(map); | |
2404 | } | |
2405 | } | |
2406 | EXPORT_SYMBOL_GPL(regulator_unregister_supply_alias); | |
2407 | ||
2408 | /** | |
2409 | * regulator_bulk_register_supply_alias - register multiple aliases | |
2410 | * | |
2411 | * @dev: device that will be given as the regulator "consumer" | |
2412 | * @id: List of supply names or regulator IDs | |
2413 | * @alias_dev: device that should be used to lookup the supply | |
2414 | * @alias_id: List of supply names or regulator IDs that should be used to | |
2415 | * lookup the supply | |
2416 | * @num_id: Number of aliases to register | |
2417 | * | |
2418 | * @return 0 on success, an errno on failure. | |
2419 | * | |
2420 | * This helper function allows drivers to register several supply | |
2421 | * aliases in one operation. If any of the aliases cannot be | |
2422 | * registered any aliases that were registered will be removed | |
2423 | * before returning to the caller. | |
2424 | */ | |
9f8c0fe9 LJ |
2425 | int regulator_bulk_register_supply_alias(struct device *dev, |
2426 | const char *const *id, | |
a06ccd9c | 2427 | struct device *alias_dev, |
9f8c0fe9 | 2428 | const char *const *alias_id, |
a06ccd9c CK |
2429 | int num_id) |
2430 | { | |
2431 | int i; | |
2432 | int ret; | |
2433 | ||
2434 | for (i = 0; i < num_id; ++i) { | |
2435 | ret = regulator_register_supply_alias(dev, id[i], alias_dev, | |
2436 | alias_id[i]); | |
2437 | if (ret < 0) | |
2438 | goto err; | |
2439 | } | |
2440 | ||
2441 | return 0; | |
2442 | ||
2443 | err: | |
2444 | dev_err(dev, | |
2445 | "Failed to create supply alias %s,%s -> %s,%s\n", | |
2446 | id[i], dev_name(dev), alias_id[i], dev_name(alias_dev)); | |
2447 | ||
2448 | while (--i >= 0) | |
2449 | regulator_unregister_supply_alias(dev, id[i]); | |
2450 | ||
2451 | return ret; | |
2452 | } | |
2453 | EXPORT_SYMBOL_GPL(regulator_bulk_register_supply_alias); | |
2454 | ||
2455 | /** | |
2456 | * regulator_bulk_unregister_supply_alias - unregister multiple aliases | |
2457 | * | |
2458 | * @dev: device that will be given as the regulator "consumer" | |
2459 | * @id: List of supply names or regulator IDs | |
2460 | * @num_id: Number of aliases to unregister | |
2461 | * | |
2462 | * This helper function allows drivers to unregister several supply | |
2463 | * aliases in one operation. | |
2464 | */ | |
2465 | void regulator_bulk_unregister_supply_alias(struct device *dev, | |
9f8c0fe9 | 2466 | const char *const *id, |
a06ccd9c CK |
2467 | int num_id) |
2468 | { | |
2469 | int i; | |
2470 | ||
2471 | for (i = 0; i < num_id; ++i) | |
2472 | regulator_unregister_supply_alias(dev, id[i]); | |
2473 | } | |
2474 | EXPORT_SYMBOL_GPL(regulator_bulk_unregister_supply_alias); | |
2475 | ||
2476 | ||
f19b00da KM |
2477 | /* Manage enable GPIO list. Same GPIO pin can be shared among regulators */ |
2478 | static int regulator_ena_gpio_request(struct regulator_dev *rdev, | |
2479 | const struct regulator_config *config) | |
2480 | { | |
467bf301 | 2481 | struct regulator_enable_gpio *pin, *new_pin; |
778b28b4 | 2482 | struct gpio_desc *gpiod; |
f19b00da | 2483 | |
541d052d | 2484 | gpiod = config->ena_gpiod; |
467bf301 MM |
2485 | new_pin = kzalloc(sizeof(*new_pin), GFP_KERNEL); |
2486 | ||
2487 | mutex_lock(®ulator_list_mutex); | |
778b28b4 | 2488 | |
f19b00da | 2489 | list_for_each_entry(pin, ®ulator_ena_gpio_list, list) { |
778b28b4 | 2490 | if (pin->gpiod == gpiod) { |
541d052d | 2491 | rdev_dbg(rdev, "GPIO is already used\n"); |
f19b00da KM |
2492 | goto update_ena_gpio_to_rdev; |
2493 | } | |
2494 | } | |
2495 | ||
467bf301 MM |
2496 | if (new_pin == NULL) { |
2497 | mutex_unlock(®ulator_list_mutex); | |
f19b00da | 2498 | return -ENOMEM; |
467bf301 MM |
2499 | } |
2500 | ||
2501 | pin = new_pin; | |
2502 | new_pin = NULL; | |
f19b00da | 2503 | |
778b28b4 | 2504 | pin->gpiod = gpiod; |
f19b00da KM |
2505 | list_add(&pin->list, ®ulator_ena_gpio_list); |
2506 | ||
2507 | update_ena_gpio_to_rdev: | |
2508 | pin->request_count++; | |
2509 | rdev->ena_pin = pin; | |
467bf301 MM |
2510 | |
2511 | mutex_unlock(®ulator_list_mutex); | |
2512 | kfree(new_pin); | |
2513 | ||
f19b00da KM |
2514 | return 0; |
2515 | } | |
2516 | ||
2517 | static void regulator_ena_gpio_free(struct regulator_dev *rdev) | |
2518 | { | |
2519 | struct regulator_enable_gpio *pin, *n; | |
2520 | ||
2521 | if (!rdev->ena_pin) | |
2522 | return; | |
2523 | ||
2524 | /* Free the GPIO only in case of no use */ | |
2525 | list_for_each_entry_safe(pin, n, ®ulator_ena_gpio_list, list) { | |
2dbf0855 MM |
2526 | if (pin != rdev->ena_pin) |
2527 | continue; | |
2528 | ||
2529 | if (--pin->request_count) | |
2530 | break; | |
2531 | ||
2532 | gpiod_put(pin->gpiod); | |
2533 | list_del(&pin->list); | |
2534 | kfree(pin); | |
2535 | break; | |
f19b00da | 2536 | } |
2dbf0855 MM |
2537 | |
2538 | rdev->ena_pin = NULL; | |
f19b00da KM |
2539 | } |
2540 | ||
967cfb18 | 2541 | /** |
31d6eebf RD |
2542 | * regulator_ena_gpio_ctrl - balance enable_count of each GPIO and actual GPIO pin control |
2543 | * @rdev: regulator_dev structure | |
2544 | * @enable: enable GPIO at initial use? | |
2545 | * | |
967cfb18 KM |
2546 | * GPIO is enabled in case of initial use. (enable_count is 0) |
2547 | * GPIO is disabled when it is not shared any more. (enable_count <= 1) | |
2548 | */ | |
2549 | static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable) | |
2550 | { | |
2551 | struct regulator_enable_gpio *pin = rdev->ena_pin; | |
2552 | ||
2553 | if (!pin) | |
2554 | return -EINVAL; | |
2555 | ||
2556 | if (enable) { | |
2557 | /* Enable GPIO at initial use */ | |
2558 | if (pin->enable_count == 0) | |
01dc79cd | 2559 | gpiod_set_value_cansleep(pin->gpiod, 1); |
967cfb18 KM |
2560 | |
2561 | pin->enable_count++; | |
2562 | } else { | |
2563 | if (pin->enable_count > 1) { | |
2564 | pin->enable_count--; | |
2565 | return 0; | |
2566 | } | |
2567 | ||
2568 | /* Disable GPIO if not used */ | |
2569 | if (pin->enable_count <= 1) { | |
01dc79cd | 2570 | gpiod_set_value_cansleep(pin->gpiod, 0); |
967cfb18 KM |
2571 | pin->enable_count = 0; |
2572 | } | |
2573 | } | |
2574 | ||
2575 | return 0; | |
2576 | } | |
2577 | ||
79fd1141 | 2578 | /** |
a38dce4c | 2579 | * _regulator_delay_helper - a delay helper function |
79fd1141 GX |
2580 | * @delay: time to delay in microseconds |
2581 | * | |
2582 | * Delay for the requested amount of time as per the guidelines in: | |
2583 | * | |
458f69ef | 2584 | * Documentation/timers/timers-howto.rst |
79fd1141 | 2585 | * |
a38dce4c | 2586 | * The assumption here is that these regulator operations will never used in |
79fd1141 GX |
2587 | * atomic context and therefore sleeping functions can be used. |
2588 | */ | |
a38dce4c | 2589 | static void _regulator_delay_helper(unsigned int delay) |
79fd1141 GX |
2590 | { |
2591 | unsigned int ms = delay / 1000; | |
2592 | unsigned int us = delay % 1000; | |
2593 | ||
2594 | if (ms > 0) { | |
2595 | /* | |
2596 | * For small enough values, handle super-millisecond | |
2597 | * delays in the usleep_range() call below. | |
2598 | */ | |
2599 | if (ms < 20) | |
2600 | us += ms * 1000; | |
2601 | else | |
2602 | msleep(ms); | |
2603 | } | |
2604 | ||
2605 | /* | |
2606 | * Give the scheduler some room to coalesce with any other | |
2607 | * wakeup sources. For delays shorter than 10 us, don't even | |
2608 | * bother setting up high-resolution timers and just busy- | |
2609 | * loop. | |
2610 | */ | |
2611 | if (us >= 10) | |
2612 | usleep_range(us, us + 100); | |
2613 | else | |
2614 | udelay(us); | |
2615 | } | |
2616 | ||
f7d7ad42 SS |
2617 | /** |
2618 | * _regulator_check_status_enabled | |
2619 | * | |
2620 | * A helper function to check if the regulator status can be interpreted | |
2621 | * as 'regulator is enabled'. | |
2622 | * @rdev: the regulator device to check | |
2623 | * | |
2624 | * Return: | |
2625 | * * 1 - if status shows regulator is in enabled state | |
2626 | * * 0 - if not enabled state | |
2627 | * * Error Value - as received from ops->get_status() | |
2628 | */ | |
2629 | static inline int _regulator_check_status_enabled(struct regulator_dev *rdev) | |
2630 | { | |
2631 | int ret = rdev->desc->ops->get_status(rdev); | |
2632 | ||
2633 | if (ret < 0) { | |
2634 | rdev_info(rdev, "get_status returned error: %d\n", ret); | |
2635 | return ret; | |
2636 | } | |
2637 | ||
2638 | switch (ret) { | |
2639 | case REGULATOR_STATUS_OFF: | |
2640 | case REGULATOR_STATUS_ERROR: | |
2641 | case REGULATOR_STATUS_UNDEFINED: | |
2642 | return 0; | |
2643 | default: | |
2644 | return 1; | |
2645 | } | |
2646 | } | |
2647 | ||
5c5659d0 MB |
2648 | static int _regulator_do_enable(struct regulator_dev *rdev) |
2649 | { | |
2650 | int ret, delay; | |
2651 | ||
2652 | /* Query before enabling in case configuration dependent. */ | |
2653 | ret = _regulator_get_enable_time(rdev); | |
2654 | if (ret >= 0) { | |
2655 | delay = ret; | |
2656 | } else { | |
61aab5ad | 2657 | rdev_warn(rdev, "enable_time() failed: %pe\n", ERR_PTR(ret)); |
5c5659d0 MB |
2658 | delay = 0; |
2659 | } | |
2660 | ||
2661 | trace_regulator_enable(rdev_get_name(rdev)); | |
2662 | ||
a8ce7bd8 | 2663 | if (rdev->desc->off_on_delay && rdev->last_off) { |
871f5650 GX |
2664 | /* if needed, keep a distance of off_on_delay from last time |
2665 | * this regulator was disabled. | |
2666 | */ | |
a8ce7bd8 VW |
2667 | ktime_t end = ktime_add_us(rdev->last_off, rdev->desc->off_on_delay); |
2668 | s64 remaining = ktime_us_delta(end, ktime_get()); | |
2669 | ||
2670 | if (remaining > 0) | |
a38dce4c | 2671 | _regulator_delay_helper(remaining); |
871f5650 GX |
2672 | } |
2673 | ||
967cfb18 | 2674 | if (rdev->ena_pin) { |
29d62ec5 DA |
2675 | if (!rdev->ena_gpio_state) { |
2676 | ret = regulator_ena_gpio_ctrl(rdev, true); | |
2677 | if (ret < 0) | |
2678 | return ret; | |
2679 | rdev->ena_gpio_state = 1; | |
2680 | } | |
65f73508 | 2681 | } else if (rdev->desc->ops->enable) { |
5c5659d0 MB |
2682 | ret = rdev->desc->ops->enable(rdev); |
2683 | if (ret < 0) | |
2684 | return ret; | |
2685 | } else { | |
2686 | return -EINVAL; | |
2687 | } | |
2688 | ||
2689 | /* Allow the regulator to ramp; it would be useful to extend | |
2690 | * this for bulk operations so that the regulators can ramp | |
69b8821e SK |
2691 | * together. |
2692 | */ | |
5c5659d0 MB |
2693 | trace_regulator_enable_delay(rdev_get_name(rdev)); |
2694 | ||
f7d7ad42 SS |
2695 | /* If poll_enabled_time is set, poll upto the delay calculated |
2696 | * above, delaying poll_enabled_time uS to check if the regulator | |
2697 | * actually got enabled. | |
a38dce4c BN |
2698 | * If the regulator isn't enabled after our delay helper has expired, |
2699 | * return -ETIMEDOUT. | |
f7d7ad42 SS |
2700 | */ |
2701 | if (rdev->desc->poll_enabled_time) { | |
2702 | unsigned int time_remaining = delay; | |
2703 | ||
2704 | while (time_remaining > 0) { | |
a38dce4c | 2705 | _regulator_delay_helper(rdev->desc->poll_enabled_time); |
f7d7ad42 SS |
2706 | |
2707 | if (rdev->desc->ops->get_status) { | |
2708 | ret = _regulator_check_status_enabled(rdev); | |
2709 | if (ret < 0) | |
2710 | return ret; | |
2711 | else if (ret) | |
2712 | break; | |
2713 | } else if (rdev->desc->ops->is_enabled(rdev)) | |
2714 | break; | |
2715 | ||
2716 | time_remaining -= rdev->desc->poll_enabled_time; | |
2717 | } | |
2718 | ||
2719 | if (time_remaining <= 0) { | |
2720 | rdev_err(rdev, "Enabled check timed out\n"); | |
2721 | return -ETIMEDOUT; | |
2722 | } | |
2723 | } else { | |
a38dce4c | 2724 | _regulator_delay_helper(delay); |
f7d7ad42 | 2725 | } |
5c5659d0 MB |
2726 | |
2727 | trace_regulator_enable_complete(rdev_get_name(rdev)); | |
2728 | ||
2729 | return 0; | |
2730 | } | |
2731 | ||
5451781d DA |
2732 | /** |
2733 | * _regulator_handle_consumer_enable - handle that a consumer enabled | |
2734 | * @regulator: regulator source | |
2735 | * | |
2736 | * Some things on a regulator consumer (like the contribution towards total | |
2737 | * load on the regulator) only have an effect when the consumer wants the | |
2738 | * regulator enabled. Explained in example with two consumers of the same | |
2739 | * regulator: | |
2740 | * consumer A: set_load(100); => total load = 0 | |
2741 | * consumer A: regulator_enable(); => total load = 100 | |
2742 | * consumer B: set_load(1000); => total load = 100 | |
2743 | * consumer B: regulator_enable(); => total load = 1100 | |
2744 | * consumer A: regulator_disable(); => total_load = 1000 | |
2745 | * | |
2746 | * This function (together with _regulator_handle_consumer_disable) is | |
2747 | * responsible for keeping track of the refcount for a given regulator consumer | |
2748 | * and applying / unapplying these things. | |
2749 | * | |
2750 | * Returns 0 upon no error; -error upon error. | |
2751 | */ | |
2752 | static int _regulator_handle_consumer_enable(struct regulator *regulator) | |
2753 | { | |
2754 | struct regulator_dev *rdev = regulator->rdev; | |
2755 | ||
2756 | lockdep_assert_held_once(&rdev->mutex.base); | |
2757 | ||
2758 | regulator->enable_count++; | |
2759 | if (regulator->uA_load && regulator->enable_count == 1) | |
2760 | return drms_uA_update(rdev); | |
2761 | ||
2762 | return 0; | |
2763 | } | |
2764 | ||
2765 | /** | |
2766 | * _regulator_handle_consumer_disable - handle that a consumer disabled | |
2767 | * @regulator: regulator source | |
2768 | * | |
2769 | * The opposite of _regulator_handle_consumer_enable(). | |
2770 | * | |
2771 | * Returns 0 upon no error; -error upon error. | |
2772 | */ | |
2773 | static int _regulator_handle_consumer_disable(struct regulator *regulator) | |
2774 | { | |
2775 | struct regulator_dev *rdev = regulator->rdev; | |
2776 | ||
2777 | lockdep_assert_held_once(&rdev->mutex.base); | |
2778 | ||
2779 | if (!regulator->enable_count) { | |
2780 | rdev_err(rdev, "Underflow of regulator enable count\n"); | |
2781 | return -EINVAL; | |
2782 | } | |
2783 | ||
2784 | regulator->enable_count--; | |
2785 | if (regulator->uA_load && regulator->enable_count == 0) | |
2786 | return drms_uA_update(rdev); | |
2787 | ||
2788 | return 0; | |
2789 | } | |
2790 | ||
414c70cb | 2791 | /* locks held by regulator_enable() */ |
5451781d | 2792 | static int _regulator_enable(struct regulator *regulator) |
414c70cb | 2793 | { |
5451781d | 2794 | struct regulator_dev *rdev = regulator->rdev; |
5c5659d0 | 2795 | int ret; |
414c70cb | 2796 | |
f8702f9e DO |
2797 | lockdep_assert_held_once(&rdev->mutex.base); |
2798 | ||
1fc12b05 | 2799 | if (rdev->use_count == 0 && rdev->supply) { |
5451781d | 2800 | ret = _regulator_enable(rdev->supply); |
f8702f9e DO |
2801 | if (ret < 0) |
2802 | return ret; | |
2803 | } | |
2804 | ||
2805 | /* balance only if there are regulators coupled */ | |
2806 | if (rdev->coupling_desc.n_coupled > 1) { | |
2807 | ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
2808 | if (ret < 0) | |
2809 | goto err_disable_supply; | |
2810 | } | |
70cfef26 | 2811 | |
5451781d DA |
2812 | ret = _regulator_handle_consumer_enable(regulator); |
2813 | if (ret < 0) | |
2814 | goto err_disable_supply; | |
414c70cb | 2815 | |
9a2372fa | 2816 | if (rdev->use_count == 0) { |
72241e31 SF |
2817 | /* |
2818 | * The regulator may already be enabled if it's not switchable | |
2819 | * or was left on | |
2820 | */ | |
9a2372fa MB |
2821 | ret = _regulator_is_enabled(rdev); |
2822 | if (ret == -EINVAL || ret == 0) { | |
8a34e979 | 2823 | if (!regulator_ops_is_valid(rdev, |
f8702f9e DO |
2824 | REGULATOR_CHANGE_STATUS)) { |
2825 | ret = -EPERM; | |
5451781d | 2826 | goto err_consumer_disable; |
f8702f9e | 2827 | } |
9a2372fa | 2828 | |
5c5659d0 | 2829 | ret = _regulator_do_enable(rdev); |
31aae2be | 2830 | if (ret < 0) |
5451781d | 2831 | goto err_consumer_disable; |
31aae2be | 2832 | |
264b88c9 HG |
2833 | _notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE, |
2834 | NULL); | |
a7433cff | 2835 | } else if (ret < 0) { |
61aab5ad | 2836 | rdev_err(rdev, "is_enabled() failed: %pe\n", ERR_PTR(ret)); |
5451781d | 2837 | goto err_consumer_disable; |
414c70cb | 2838 | } |
a7433cff | 2839 | /* Fallthrough on positive return values - already enabled */ |
414c70cb LG |
2840 | } |
2841 | ||
9a2372fa MB |
2842 | rdev->use_count++; |
2843 | ||
2844 | return 0; | |
f8702f9e | 2845 | |
5451781d DA |
2846 | err_consumer_disable: |
2847 | _regulator_handle_consumer_disable(regulator); | |
2848 | ||
f8702f9e | 2849 | err_disable_supply: |
1fc12b05 | 2850 | if (rdev->use_count == 0 && rdev->supply) |
5451781d | 2851 | _regulator_disable(rdev->supply); |
f8702f9e DO |
2852 | |
2853 | return ret; | |
414c70cb LG |
2854 | } |
2855 | ||
2856 | /** | |
2857 | * regulator_enable - enable regulator output | |
2858 | * @regulator: regulator source | |
2859 | * | |
cf7bbcdf MB |
2860 | * Request that the regulator be enabled with the regulator output at |
2861 | * the predefined voltage or current value. Calls to regulator_enable() | |
2862 | * must be balanced with calls to regulator_disable(). | |
2863 | * | |
414c70cb | 2864 | * NOTE: the output value can be set by other drivers, boot loader or may be |
cf7bbcdf | 2865 | * hardwired in the regulator. |
414c70cb LG |
2866 | */ |
2867 | int regulator_enable(struct regulator *regulator) | |
2868 | { | |
412aec61 | 2869 | struct regulator_dev *rdev = regulator->rdev; |
f8702f9e | 2870 | struct ww_acquire_ctx ww_ctx; |
5451781d | 2871 | int ret; |
6492bc1b | 2872 | |
f8702f9e | 2873 | regulator_lock_dependent(rdev, &ww_ctx); |
5451781d | 2874 | ret = _regulator_enable(regulator); |
f8702f9e | 2875 | regulator_unlock_dependent(rdev, &ww_ctx); |
3801b86a | 2876 | |
414c70cb LG |
2877 | return ret; |
2878 | } | |
2879 | EXPORT_SYMBOL_GPL(regulator_enable); | |
2880 | ||
5c5659d0 MB |
2881 | static int _regulator_do_disable(struct regulator_dev *rdev) |
2882 | { | |
2883 | int ret; | |
2884 | ||
2885 | trace_regulator_disable(rdev_get_name(rdev)); | |
2886 | ||
967cfb18 | 2887 | if (rdev->ena_pin) { |
29d62ec5 DA |
2888 | if (rdev->ena_gpio_state) { |
2889 | ret = regulator_ena_gpio_ctrl(rdev, false); | |
2890 | if (ret < 0) | |
2891 | return ret; | |
2892 | rdev->ena_gpio_state = 0; | |
2893 | } | |
5c5659d0 MB |
2894 | |
2895 | } else if (rdev->desc->ops->disable) { | |
2896 | ret = rdev->desc->ops->disable(rdev); | |
2897 | if (ret != 0) | |
2898 | return ret; | |
2899 | } | |
2900 | ||
871f5650 | 2901 | if (rdev->desc->off_on_delay) |
a8ce7bd8 | 2902 | rdev->last_off = ktime_get(); |
871f5650 | 2903 | |
5c5659d0 MB |
2904 | trace_regulator_disable_complete(rdev_get_name(rdev)); |
2905 | ||
5c5659d0 MB |
2906 | return 0; |
2907 | } | |
2908 | ||
414c70cb | 2909 | /* locks held by regulator_disable() */ |
5451781d | 2910 | static int _regulator_disable(struct regulator *regulator) |
414c70cb | 2911 | { |
5451781d | 2912 | struct regulator_dev *rdev = regulator->rdev; |
414c70cb LG |
2913 | int ret = 0; |
2914 | ||
f8702f9e | 2915 | lockdep_assert_held_once(&rdev->mutex.base); |
70cfef26 | 2916 | |
cd94b505 | 2917 | if (WARN(rdev->use_count <= 0, |
43e7ee33 | 2918 | "unbalanced disables for %s\n", rdev_get_name(rdev))) |
cd94b505 DB |
2919 | return -EIO; |
2920 | ||
414c70cb | 2921 | /* are we the last user and permitted to disable ? */ |
60ef66fc MB |
2922 | if (rdev->use_count == 1 && |
2923 | (rdev->constraints && !rdev->constraints->always_on)) { | |
414c70cb LG |
2924 | |
2925 | /* we are last user */ | |
8a34e979 | 2926 | if (regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS)) { |
a1c8a551 RF |
2927 | ret = _notifier_call_chain(rdev, |
2928 | REGULATOR_EVENT_PRE_DISABLE, | |
2929 | NULL); | |
2930 | if (ret & NOTIFY_STOP_MASK) | |
2931 | return -EINVAL; | |
2932 | ||
5c5659d0 | 2933 | ret = _regulator_do_disable(rdev); |
414c70cb | 2934 | if (ret < 0) { |
61aab5ad | 2935 | rdev_err(rdev, "failed to disable: %pe\n", ERR_PTR(ret)); |
a1c8a551 RF |
2936 | _notifier_call_chain(rdev, |
2937 | REGULATOR_EVENT_ABORT_DISABLE, | |
2938 | NULL); | |
414c70cb LG |
2939 | return ret; |
2940 | } | |
66fda75f MP |
2941 | _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, |
2942 | NULL); | |
414c70cb LG |
2943 | } |
2944 | ||
414c70cb LG |
2945 | rdev->use_count = 0; |
2946 | } else if (rdev->use_count > 1) { | |
414c70cb LG |
2947 | rdev->use_count--; |
2948 | } | |
3801b86a | 2949 | |
5451781d DA |
2950 | if (ret == 0) |
2951 | ret = _regulator_handle_consumer_disable(regulator); | |
2952 | ||
f8702f9e DO |
2953 | if (ret == 0 && rdev->coupling_desc.n_coupled > 1) |
2954 | ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
2955 | ||
1fc12b05 | 2956 | if (ret == 0 && rdev->use_count == 0 && rdev->supply) |
5451781d | 2957 | ret = _regulator_disable(rdev->supply); |
f8702f9e | 2958 | |
414c70cb LG |
2959 | return ret; |
2960 | } | |
2961 | ||
2962 | /** | |
2963 | * regulator_disable - disable regulator output | |
2964 | * @regulator: regulator source | |
2965 | * | |
cf7bbcdf MB |
2966 | * Disable the regulator output voltage or current. Calls to |
2967 | * regulator_enable() must be balanced with calls to | |
2968 | * regulator_disable(). | |
69279fb9 | 2969 | * |
414c70cb | 2970 | * NOTE: this will only disable the regulator output if no other consumer |
cf7bbcdf MB |
2971 | * devices have it enabled, the regulator device supports disabling and |
2972 | * machine constraints permit this operation. | |
414c70cb LG |
2973 | */ |
2974 | int regulator_disable(struct regulator *regulator) | |
2975 | { | |
412aec61 | 2976 | struct regulator_dev *rdev = regulator->rdev; |
f8702f9e | 2977 | struct ww_acquire_ctx ww_ctx; |
5451781d | 2978 | int ret; |
6492bc1b | 2979 | |
f8702f9e | 2980 | regulator_lock_dependent(rdev, &ww_ctx); |
5451781d | 2981 | ret = _regulator_disable(regulator); |
f8702f9e | 2982 | regulator_unlock_dependent(rdev, &ww_ctx); |
8cbf811d | 2983 | |
414c70cb LG |
2984 | return ret; |
2985 | } | |
2986 | EXPORT_SYMBOL_GPL(regulator_disable); | |
2987 | ||
2988 | /* locks held by regulator_force_disable() */ | |
3801b86a | 2989 | static int _regulator_force_disable(struct regulator_dev *rdev) |
414c70cb LG |
2990 | { |
2991 | int ret = 0; | |
2992 | ||
f8702f9e | 2993 | lockdep_assert_held_once(&rdev->mutex.base); |
70cfef26 | 2994 | |
a1c8a551 RF |
2995 | ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | |
2996 | REGULATOR_EVENT_PRE_DISABLE, NULL); | |
2997 | if (ret & NOTIFY_STOP_MASK) | |
2998 | return -EINVAL; | |
2999 | ||
66fda75f MP |
3000 | ret = _regulator_do_disable(rdev); |
3001 | if (ret < 0) { | |
61aab5ad | 3002 | rdev_err(rdev, "failed to force disable: %pe\n", ERR_PTR(ret)); |
a1c8a551 RF |
3003 | _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | |
3004 | REGULATOR_EVENT_ABORT_DISABLE, NULL); | |
66fda75f | 3005 | return ret; |
414c70cb LG |
3006 | } |
3007 | ||
66fda75f MP |
3008 | _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | |
3009 | REGULATOR_EVENT_DISABLE, NULL); | |
3010 | ||
3011 | return 0; | |
414c70cb LG |
3012 | } |
3013 | ||
3014 | /** | |
3015 | * regulator_force_disable - force disable regulator output | |
3016 | * @regulator: regulator source | |
3017 | * | |
3018 | * Forcibly disable the regulator output voltage or current. | |
3019 | * NOTE: this *will* disable the regulator output even if other consumer | |
3020 | * devices have it enabled. This should be used for situations when device | |
3021 | * damage will likely occur if the regulator is not disabled (e.g. over temp). | |
3022 | */ | |
3023 | int regulator_force_disable(struct regulator *regulator) | |
3024 | { | |
82d15839 | 3025 | struct regulator_dev *rdev = regulator->rdev; |
f8702f9e | 3026 | struct ww_acquire_ctx ww_ctx; |
414c70cb LG |
3027 | int ret; |
3028 | ||
f8702f9e | 3029 | regulator_lock_dependent(rdev, &ww_ctx); |
5451781d | 3030 | |
3801b86a | 3031 | ret = _regulator_force_disable(regulator->rdev); |
5451781d | 3032 | |
9243a195 MP |
3033 | if (rdev->coupling_desc.n_coupled > 1) |
3034 | regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
5451781d DA |
3035 | |
3036 | if (regulator->uA_load) { | |
3037 | regulator->uA_load = 0; | |
3038 | ret = drms_uA_update(rdev); | |
3039 | } | |
3040 | ||
1fc12b05 DA |
3041 | if (rdev->use_count != 0 && rdev->supply) |
3042 | _regulator_disable(rdev->supply); | |
8cbf811d | 3043 | |
1fc12b05 | 3044 | regulator_unlock_dependent(rdev, &ww_ctx); |
8cbf811d | 3045 | |
414c70cb LG |
3046 | return ret; |
3047 | } | |
3048 | EXPORT_SYMBOL_GPL(regulator_force_disable); | |
3049 | ||
da07ecd9 MB |
3050 | static void regulator_disable_work(struct work_struct *work) |
3051 | { | |
3052 | struct regulator_dev *rdev = container_of(work, struct regulator_dev, | |
3053 | disable_work.work); | |
f8702f9e | 3054 | struct ww_acquire_ctx ww_ctx; |
da07ecd9 | 3055 | int count, i, ret; |
5451781d DA |
3056 | struct regulator *regulator; |
3057 | int total_count = 0; | |
da07ecd9 | 3058 | |
f8702f9e | 3059 | regulator_lock_dependent(rdev, &ww_ctx); |
da07ecd9 | 3060 | |
c9ccaa0c TR |
3061 | /* |
3062 | * Workqueue functions queue the new work instance while the previous | |
3063 | * work instance is being processed. Cancel the queued work instance | |
3064 | * as the work instance under processing does the job of the queued | |
3065 | * work instance. | |
3066 | */ | |
3067 | cancel_delayed_work(&rdev->disable_work); | |
3068 | ||
5451781d DA |
3069 | list_for_each_entry(regulator, &rdev->consumer_list, list) { |
3070 | count = regulator->deferred_disables; | |
3071 | ||
3072 | if (!count) | |
3073 | continue; | |
3074 | ||
3075 | total_count += count; | |
3076 | regulator->deferred_disables = 0; | |
3077 | ||
3078 | for (i = 0; i < count; i++) { | |
3079 | ret = _regulator_disable(regulator); | |
3080 | if (ret != 0) | |
61aab5ad MM |
3081 | rdev_err(rdev, "Deferred disable failed: %pe\n", |
3082 | ERR_PTR(ret)); | |
5451781d | 3083 | } |
da07ecd9 | 3084 | } |
5451781d | 3085 | WARN_ON(!total_count); |
da07ecd9 | 3086 | |
f8702f9e DO |
3087 | if (rdev->coupling_desc.n_coupled > 1) |
3088 | regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
3089 | ||
3090 | regulator_unlock_dependent(rdev, &ww_ctx); | |
da07ecd9 MB |
3091 | } |
3092 | ||
3093 | /** | |
3094 | * regulator_disable_deferred - disable regulator output with delay | |
3095 | * @regulator: regulator source | |
48f1b4ef | 3096 | * @ms: milliseconds until the regulator is disabled |
da07ecd9 MB |
3097 | * |
3098 | * Execute regulator_disable() on the regulator after a delay. This | |
3099 | * is intended for use with devices that require some time to quiesce. | |
3100 | * | |
3101 | * NOTE: this will only disable the regulator output if no other consumer | |
3102 | * devices have it enabled, the regulator device supports disabling and | |
3103 | * machine constraints permit this operation. | |
3104 | */ | |
3105 | int regulator_disable_deferred(struct regulator *regulator, int ms) | |
3106 | { | |
3107 | struct regulator_dev *rdev = regulator->rdev; | |
3108 | ||
2b5a24a0 MB |
3109 | if (!ms) |
3110 | return regulator_disable(regulator); | |
3111 | ||
66cf9a7e | 3112 | regulator_lock(rdev); |
5451781d | 3113 | regulator->deferred_disables++; |
c9ccaa0c TR |
3114 | mod_delayed_work(system_power_efficient_wq, &rdev->disable_work, |
3115 | msecs_to_jiffies(ms)); | |
66cf9a7e | 3116 | regulator_unlock(rdev); |
da07ecd9 | 3117 | |
70dc6daf | 3118 | return 0; |
da07ecd9 MB |
3119 | } |
3120 | EXPORT_SYMBOL_GPL(regulator_disable_deferred); | |
3121 | ||
414c70cb LG |
3122 | static int _regulator_is_enabled(struct regulator_dev *rdev) |
3123 | { | |
65f73508 | 3124 | /* A GPIO control always takes precedence */ |
7b74d149 | 3125 | if (rdev->ena_pin) |
65f73508 MB |
3126 | return rdev->ena_gpio_state; |
3127 | ||
9a7f6a4c | 3128 | /* If we don't know then assume that the regulator is always on */ |
9332546f | 3129 | if (!rdev->desc->ops->is_enabled) |
9a7f6a4c | 3130 | return 1; |
414c70cb | 3131 | |
9332546f | 3132 | return rdev->desc->ops->is_enabled(rdev); |
414c70cb LG |
3133 | } |
3134 | ||
3d67fe95 MP |
3135 | static int _regulator_list_voltage(struct regulator_dev *rdev, |
3136 | unsigned selector, int lock) | |
3a40cfc3 | 3137 | { |
3a40cfc3 SH |
3138 | const struct regulator_ops *ops = rdev->desc->ops; |
3139 | int ret; | |
3140 | ||
3141 | if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector) | |
3142 | return rdev->desc->fixed_uV; | |
3143 | ||
3144 | if (ops->list_voltage) { | |
3145 | if (selector >= rdev->desc->n_voltages) | |
3146 | return -EINVAL; | |
55cca739 CB |
3147 | if (selector < rdev->desc->linear_min_sel) |
3148 | return 0; | |
3a40cfc3 | 3149 | if (lock) |
66cf9a7e | 3150 | regulator_lock(rdev); |
3a40cfc3 SH |
3151 | ret = ops->list_voltage(rdev, selector); |
3152 | if (lock) | |
66cf9a7e | 3153 | regulator_unlock(rdev); |
fd086045 | 3154 | } else if (rdev->is_switch && rdev->supply) { |
3d67fe95 MP |
3155 | ret = _regulator_list_voltage(rdev->supply->rdev, |
3156 | selector, lock); | |
3a40cfc3 SH |
3157 | } else { |
3158 | return -EINVAL; | |
3159 | } | |
3160 | ||
3161 | if (ret > 0) { | |
3162 | if (ret < rdev->constraints->min_uV) | |
3163 | ret = 0; | |
3164 | else if (ret > rdev->constraints->max_uV) | |
3165 | ret = 0; | |
3166 | } | |
3167 | ||
3168 | return ret; | |
3169 | } | |
3170 | ||
414c70cb LG |
3171 | /** |
3172 | * regulator_is_enabled - is the regulator output enabled | |
3173 | * @regulator: regulator source | |
3174 | * | |
412aec61 DB |
3175 | * Returns positive if the regulator driver backing the source/client |
3176 | * has requested that the device be enabled, zero if it hasn't, else a | |
3177 | * negative errno code. | |
3178 | * | |
3179 | * Note that the device backing this regulator handle can have multiple | |
3180 | * users, so it might be enabled even if regulator_enable() was never | |
3181 | * called for this particular source. | |
414c70cb LG |
3182 | */ |
3183 | int regulator_is_enabled(struct regulator *regulator) | |
3184 | { | |
9332546f MB |
3185 | int ret; |
3186 | ||
6492bc1b MB |
3187 | if (regulator->always_on) |
3188 | return 1; | |
3189 | ||
f8702f9e | 3190 | regulator_lock(regulator->rdev); |
9332546f | 3191 | ret = _regulator_is_enabled(regulator->rdev); |
f8702f9e | 3192 | regulator_unlock(regulator->rdev); |
9332546f MB |
3193 | |
3194 | return ret; | |
414c70cb LG |
3195 | } |
3196 | EXPORT_SYMBOL_GPL(regulator_is_enabled); | |
3197 | ||
4367cfdc DB |
3198 | /** |
3199 | * regulator_count_voltages - count regulator_list_voltage() selectors | |
3200 | * @regulator: regulator source | |
3201 | * | |
3202 | * Returns number of selectors, or negative errno. Selectors are | |
3203 | * numbered starting at zero, and typically correspond to bitfields | |
3204 | * in hardware registers. | |
3205 | */ | |
3206 | int regulator_count_voltages(struct regulator *regulator) | |
3207 | { | |
3208 | struct regulator_dev *rdev = regulator->rdev; | |
3209 | ||
26988efe JMC |
3210 | if (rdev->desc->n_voltages) |
3211 | return rdev->desc->n_voltages; | |
3212 | ||
fd086045 | 3213 | if (!rdev->is_switch || !rdev->supply) |
26988efe JMC |
3214 | return -EINVAL; |
3215 | ||
3216 | return regulator_count_voltages(rdev->supply); | |
4367cfdc DB |
3217 | } |
3218 | EXPORT_SYMBOL_GPL(regulator_count_voltages); | |
3219 | ||
3220 | /** | |
3221 | * regulator_list_voltage - enumerate supported voltages | |
3222 | * @regulator: regulator source | |
3223 | * @selector: identify voltage to list | |
3224 | * Context: can sleep | |
3225 | * | |
3226 | * Returns a voltage that can be passed to @regulator_set_voltage(), | |
88393161 | 3227 | * zero if this selector code can't be used on this system, or a |
4367cfdc DB |
3228 | * negative errno. |
3229 | */ | |
3230 | int regulator_list_voltage(struct regulator *regulator, unsigned selector) | |
3231 | { | |
3d67fe95 | 3232 | return _regulator_list_voltage(regulator->rdev, selector, 1); |
4367cfdc DB |
3233 | } |
3234 | EXPORT_SYMBOL_GPL(regulator_list_voltage); | |
3235 | ||
04eca28c TT |
3236 | /** |
3237 | * regulator_get_regmap - get the regulator's register map | |
3238 | * @regulator: regulator source | |
3239 | * | |
3240 | * Returns the register map for the given regulator, or an ERR_PTR value | |
3241 | * if the regulator doesn't use regmap. | |
3242 | */ | |
3243 | struct regmap *regulator_get_regmap(struct regulator *regulator) | |
3244 | { | |
3245 | struct regmap *map = regulator->rdev->regmap; | |
3246 | ||
3247 | return map ? map : ERR_PTR(-EOPNOTSUPP); | |
3248 | } | |
3249 | ||
3250 | /** | |
3251 | * regulator_get_hardware_vsel_register - get the HW voltage selector register | |
3252 | * @regulator: regulator source | |
3253 | * @vsel_reg: voltage selector register, output parameter | |
3254 | * @vsel_mask: mask for voltage selector bitfield, output parameter | |
3255 | * | |
3256 | * Returns the hardware register offset and bitmask used for setting the | |
3257 | * regulator voltage. This might be useful when configuring voltage-scaling | |
3258 | * hardware or firmware that can make I2C requests behind the kernel's back, | |
3259 | * for example. | |
3260 | * | |
3261 | * On success, the output parameters @vsel_reg and @vsel_mask are filled in | |
3262 | * and 0 is returned, otherwise a negative errno is returned. | |
3263 | */ | |
3264 | int regulator_get_hardware_vsel_register(struct regulator *regulator, | |
3265 | unsigned *vsel_reg, | |
3266 | unsigned *vsel_mask) | |
3267 | { | |
39f5460d GX |
3268 | struct regulator_dev *rdev = regulator->rdev; |
3269 | const struct regulator_ops *ops = rdev->desc->ops; | |
04eca28c TT |
3270 | |
3271 | if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap) | |
3272 | return -EOPNOTSUPP; | |
3273 | ||
0d5c8633 CIK |
3274 | *vsel_reg = rdev->desc->vsel_reg; |
3275 | *vsel_mask = rdev->desc->vsel_mask; | |
04eca28c | 3276 | |
be35cc46 | 3277 | return 0; |
04eca28c TT |
3278 | } |
3279 | EXPORT_SYMBOL_GPL(regulator_get_hardware_vsel_register); | |
3280 | ||
3281 | /** | |
3282 | * regulator_list_hardware_vsel - get the HW-specific register value for a selector | |
3283 | * @regulator: regulator source | |
3284 | * @selector: identify voltage to list | |
3285 | * | |
3286 | * Converts the selector to a hardware-specific voltage selector that can be | |
3287 | * directly written to the regulator registers. The address of the voltage | |
3288 | * register can be determined by calling @regulator_get_hardware_vsel_register. | |
3289 | * | |
3290 | * On error a negative errno is returned. | |
3291 | */ | |
3292 | int regulator_list_hardware_vsel(struct regulator *regulator, | |
3293 | unsigned selector) | |
3294 | { | |
39f5460d GX |
3295 | struct regulator_dev *rdev = regulator->rdev; |
3296 | const struct regulator_ops *ops = rdev->desc->ops; | |
04eca28c TT |
3297 | |
3298 | if (selector >= rdev->desc->n_voltages) | |
3299 | return -EINVAL; | |
55cca739 CB |
3300 | if (selector < rdev->desc->linear_min_sel) |
3301 | return 0; | |
04eca28c TT |
3302 | if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap) |
3303 | return -EOPNOTSUPP; | |
3304 | ||
3305 | return selector; | |
3306 | } | |
3307 | EXPORT_SYMBOL_GPL(regulator_list_hardware_vsel); | |
3308 | ||
2a668a8b PW |
3309 | /** |
3310 | * regulator_get_linear_step - return the voltage step size between VSEL values | |
3311 | * @regulator: regulator source | |
3312 | * | |
3313 | * Returns the voltage step size between VSEL values for linear | |
3314 | * regulators, or return 0 if the regulator isn't a linear regulator. | |
3315 | */ | |
3316 | unsigned int regulator_get_linear_step(struct regulator *regulator) | |
3317 | { | |
3318 | struct regulator_dev *rdev = regulator->rdev; | |
3319 | ||
3320 | return rdev->desc->uV_step; | |
3321 | } | |
3322 | EXPORT_SYMBOL_GPL(regulator_get_linear_step); | |
3323 | ||
a7a1ad90 MB |
3324 | /** |
3325 | * regulator_is_supported_voltage - check if a voltage range can be supported | |
3326 | * | |
3327 | * @regulator: Regulator to check. | |
3328 | * @min_uV: Minimum required voltage in uV. | |
3329 | * @max_uV: Maximum required voltage in uV. | |
3330 | * | |
49820944 | 3331 | * Returns a boolean. |
a7a1ad90 MB |
3332 | */ |
3333 | int regulator_is_supported_voltage(struct regulator *regulator, | |
3334 | int min_uV, int max_uV) | |
3335 | { | |
c5f3939b | 3336 | struct regulator_dev *rdev = regulator->rdev; |
a7a1ad90 MB |
3337 | int i, voltages, ret; |
3338 | ||
c5f3939b | 3339 | /* If we can't change voltage check the current voltage */ |
8a34e979 | 3340 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) { |
c5f3939b MB |
3341 | ret = regulator_get_voltage(regulator); |
3342 | if (ret >= 0) | |
0d25d09d | 3343 | return min_uV <= ret && ret <= max_uV; |
c5f3939b MB |
3344 | else |
3345 | return ret; | |
3346 | } | |
3347 | ||
bd7a2b60 PM |
3348 | /* Any voltage within constrains range is fine? */ |
3349 | if (rdev->desc->continuous_voltage_range) | |
3350 | return min_uV >= rdev->constraints->min_uV && | |
3351 | max_uV <= rdev->constraints->max_uV; | |
3352 | ||
a7a1ad90 MB |
3353 | ret = regulator_count_voltages(regulator); |
3354 | if (ret < 0) | |
49820944 | 3355 | return 0; |
a7a1ad90 MB |
3356 | voltages = ret; |
3357 | ||
3358 | for (i = 0; i < voltages; i++) { | |
3359 | ret = regulator_list_voltage(regulator, i); | |
3360 | ||
3361 | if (ret >= min_uV && ret <= max_uV) | |
3362 | return 1; | |
3363 | } | |
3364 | ||
3365 | return 0; | |
3366 | } | |
a398eaa2 | 3367 | EXPORT_SYMBOL_GPL(regulator_is_supported_voltage); |
a7a1ad90 | 3368 | |
a204f41e SH |
3369 | static int regulator_map_voltage(struct regulator_dev *rdev, int min_uV, |
3370 | int max_uV) | |
3371 | { | |
3372 | const struct regulator_desc *desc = rdev->desc; | |
3373 | ||
3374 | if (desc->ops->map_voltage) | |
3375 | return desc->ops->map_voltage(rdev, min_uV, max_uV); | |
3376 | ||
3377 | if (desc->ops->list_voltage == regulator_list_voltage_linear) | |
3378 | return regulator_map_voltage_linear(rdev, min_uV, max_uV); | |
3379 | ||
3380 | if (desc->ops->list_voltage == regulator_list_voltage_linear_range) | |
3381 | return regulator_map_voltage_linear_range(rdev, min_uV, max_uV); | |
3382 | ||
18e4b55f MV |
3383 | if (desc->ops->list_voltage == |
3384 | regulator_list_voltage_pickable_linear_range) | |
3385 | return regulator_map_voltage_pickable_linear_range(rdev, | |
3386 | min_uV, max_uV); | |
3387 | ||
a204f41e SH |
3388 | return regulator_map_voltage_iterate(rdev, min_uV, max_uV); |
3389 | } | |
3390 | ||
7179569a HS |
3391 | static int _regulator_call_set_voltage(struct regulator_dev *rdev, |
3392 | int min_uV, int max_uV, | |
3393 | unsigned *selector) | |
3394 | { | |
3395 | struct pre_voltage_change_data data; | |
3396 | int ret; | |
3397 | ||
d22b85a1 | 3398 | data.old_uV = regulator_get_voltage_rdev(rdev); |
7179569a HS |
3399 | data.min_uV = min_uV; |
3400 | data.max_uV = max_uV; | |
3401 | ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE, | |
3402 | &data); | |
3403 | if (ret & NOTIFY_STOP_MASK) | |
3404 | return -EINVAL; | |
3405 | ||
3406 | ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, selector); | |
3407 | if (ret >= 0) | |
3408 | return ret; | |
3409 | ||
3410 | _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE, | |
3411 | (void *)data.old_uV); | |
3412 | ||
3413 | return ret; | |
3414 | } | |
3415 | ||
3416 | static int _regulator_call_set_voltage_sel(struct regulator_dev *rdev, | |
3417 | int uV, unsigned selector) | |
3418 | { | |
3419 | struct pre_voltage_change_data data; | |
3420 | int ret; | |
3421 | ||
d22b85a1 | 3422 | data.old_uV = regulator_get_voltage_rdev(rdev); |
7179569a HS |
3423 | data.min_uV = uV; |
3424 | data.max_uV = uV; | |
3425 | ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE, | |
3426 | &data); | |
3427 | if (ret & NOTIFY_STOP_MASK) | |
3428 | return -EINVAL; | |
3429 | ||
3430 | ret = rdev->desc->ops->set_voltage_sel(rdev, selector); | |
3431 | if (ret >= 0) | |
3432 | return ret; | |
3433 | ||
3434 | _notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE, | |
3435 | (void *)data.old_uV); | |
3436 | ||
3437 | return ret; | |
3438 | } | |
3439 | ||
2da8d947 BG |
3440 | static int _regulator_set_voltage_sel_step(struct regulator_dev *rdev, |
3441 | int uV, int new_selector) | |
3442 | { | |
3443 | const struct regulator_ops *ops = rdev->desc->ops; | |
3444 | int diff, old_sel, curr_sel, ret; | |
3445 | ||
3446 | /* Stepping is only needed if the regulator is enabled. */ | |
3447 | if (!_regulator_is_enabled(rdev)) | |
3448 | goto final_set; | |
3449 | ||
3450 | if (!ops->get_voltage_sel) | |
3451 | return -EINVAL; | |
3452 | ||
3453 | old_sel = ops->get_voltage_sel(rdev); | |
3454 | if (old_sel < 0) | |
3455 | return old_sel; | |
3456 | ||
3457 | diff = new_selector - old_sel; | |
3458 | if (diff == 0) | |
3459 | return 0; /* No change needed. */ | |
3460 | ||
3461 | if (diff > 0) { | |
3462 | /* Stepping up. */ | |
3463 | for (curr_sel = old_sel + rdev->desc->vsel_step; | |
3464 | curr_sel < new_selector; | |
3465 | curr_sel += rdev->desc->vsel_step) { | |
3466 | /* | |
3467 | * Call the callback directly instead of using | |
3468 | * _regulator_call_set_voltage_sel() as we don't | |
3469 | * want to notify anyone yet. Same in the branch | |
3470 | * below. | |
3471 | */ | |
3472 | ret = ops->set_voltage_sel(rdev, curr_sel); | |
3473 | if (ret) | |
3474 | goto try_revert; | |
3475 | } | |
3476 | } else { | |
3477 | /* Stepping down. */ | |
3478 | for (curr_sel = old_sel - rdev->desc->vsel_step; | |
3479 | curr_sel > new_selector; | |
3480 | curr_sel -= rdev->desc->vsel_step) { | |
3481 | ret = ops->set_voltage_sel(rdev, curr_sel); | |
3482 | if (ret) | |
3483 | goto try_revert; | |
3484 | } | |
3485 | } | |
3486 | ||
3487 | final_set: | |
3488 | /* The final selector will trigger the notifiers. */ | |
3489 | return _regulator_call_set_voltage_sel(rdev, uV, new_selector); | |
3490 | ||
3491 | try_revert: | |
3492 | /* | |
3493 | * At least try to return to the previous voltage if setting a new | |
3494 | * one failed. | |
3495 | */ | |
3496 | (void)ops->set_voltage_sel(rdev, old_sel); | |
3497 | return ret; | |
3498 | } | |
3499 | ||
73e705bf MK |
3500 | static int _regulator_set_voltage_time(struct regulator_dev *rdev, |
3501 | int old_uV, int new_uV) | |
3502 | { | |
3503 | unsigned int ramp_delay = 0; | |
3504 | ||
3505 | if (rdev->constraints->ramp_delay) | |
3506 | ramp_delay = rdev->constraints->ramp_delay; | |
3507 | else if (rdev->desc->ramp_delay) | |
3508 | ramp_delay = rdev->desc->ramp_delay; | |
d6c1dc3f LD |
3509 | else if (rdev->constraints->settling_time) |
3510 | return rdev->constraints->settling_time; | |
3ffad468 MK |
3511 | else if (rdev->constraints->settling_time_up && |
3512 | (new_uV > old_uV)) | |
3513 | return rdev->constraints->settling_time_up; | |
3514 | else if (rdev->constraints->settling_time_down && | |
3515 | (new_uV < old_uV)) | |
3516 | return rdev->constraints->settling_time_down; | |
73e705bf | 3517 | |
0739ce4c | 3518 | if (ramp_delay == 0) |
73e705bf | 3519 | return 0; |
73e705bf MK |
3520 | |
3521 | return DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay); | |
3522 | } | |
3523 | ||
75790251 MB |
3524 | static int _regulator_do_set_voltage(struct regulator_dev *rdev, |
3525 | int min_uV, int max_uV) | |
3526 | { | |
3527 | int ret; | |
77af1b26 | 3528 | int delay = 0; |
e113d792 | 3529 | int best_val = 0; |
75790251 | 3530 | unsigned int selector; |
eba41a5e | 3531 | int old_selector = -1; |
57995a48 | 3532 | const struct regulator_ops *ops = rdev->desc->ops; |
d22b85a1 | 3533 | int old_uV = regulator_get_voltage_rdev(rdev); |
75790251 MB |
3534 | |
3535 | trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV); | |
3536 | ||
bf5892a8 MB |
3537 | min_uV += rdev->constraints->uV_offset; |
3538 | max_uV += rdev->constraints->uV_offset; | |
3539 | ||
eba41a5e AL |
3540 | /* |
3541 | * If we can't obtain the old selector there is not enough | |
3542 | * info to call set_voltage_time_sel(). | |
3543 | */ | |
8b7485ef | 3544 | if (_regulator_is_enabled(rdev) && |
57995a48 MK |
3545 | ops->set_voltage_time_sel && ops->get_voltage_sel) { |
3546 | old_selector = ops->get_voltage_sel(rdev); | |
eba41a5e AL |
3547 | if (old_selector < 0) |
3548 | return old_selector; | |
3549 | } | |
3550 | ||
57995a48 | 3551 | if (ops->set_voltage) { |
7179569a HS |
3552 | ret = _regulator_call_set_voltage(rdev, min_uV, max_uV, |
3553 | &selector); | |
e113d792 MB |
3554 | |
3555 | if (ret >= 0) { | |
57995a48 MK |
3556 | if (ops->list_voltage) |
3557 | best_val = ops->list_voltage(rdev, | |
3558 | selector); | |
e113d792 | 3559 | else |
d22b85a1 | 3560 | best_val = regulator_get_voltage_rdev(rdev); |
e113d792 MB |
3561 | } |
3562 | ||
57995a48 | 3563 | } else if (ops->set_voltage_sel) { |
a204f41e | 3564 | ret = regulator_map_voltage(rdev, min_uV, max_uV); |
e843fc46 | 3565 | if (ret >= 0) { |
57995a48 | 3566 | best_val = ops->list_voltage(rdev, ret); |
e113d792 MB |
3567 | if (min_uV <= best_val && max_uV >= best_val) { |
3568 | selector = ret; | |
c66a566a AL |
3569 | if (old_selector == selector) |
3570 | ret = 0; | |
2da8d947 BG |
3571 | else if (rdev->desc->vsel_step) |
3572 | ret = _regulator_set_voltage_sel_step( | |
3573 | rdev, best_val, selector); | |
c66a566a | 3574 | else |
7179569a HS |
3575 | ret = _regulator_call_set_voltage_sel( |
3576 | rdev, best_val, selector); | |
e113d792 MB |
3577 | } else { |
3578 | ret = -EINVAL; | |
3579 | } | |
e8eef82b | 3580 | } |
75790251 MB |
3581 | } else { |
3582 | ret = -EINVAL; | |
3583 | } | |
e8eef82b | 3584 | |
31dfe686 MK |
3585 | if (ret) |
3586 | goto out; | |
77af1b26 | 3587 | |
73e705bf MK |
3588 | if (ops->set_voltage_time_sel) { |
3589 | /* | |
3590 | * Call set_voltage_time_sel if successfully obtained | |
3591 | * old_selector | |
3592 | */ | |
3593 | if (old_selector >= 0 && old_selector != selector) | |
3594 | delay = ops->set_voltage_time_sel(rdev, old_selector, | |
3595 | selector); | |
3596 | } else { | |
3597 | if (old_uV != best_val) { | |
3598 | if (ops->set_voltage_time) | |
3599 | delay = ops->set_voltage_time(rdev, old_uV, | |
3600 | best_val); | |
3601 | else | |
3602 | delay = _regulator_set_voltage_time(rdev, | |
3603 | old_uV, | |
3604 | best_val); | |
e8eef82b | 3605 | } |
73e705bf | 3606 | } |
75790251 | 3607 | |
73e705bf | 3608 | if (delay < 0) { |
61aab5ad | 3609 | rdev_warn(rdev, "failed to get delay: %pe\n", ERR_PTR(delay)); |
73e705bf | 3610 | delay = 0; |
77af1b26 LW |
3611 | } |
3612 | ||
73e705bf | 3613 | /* Insert any necessary delays */ |
062920d2 | 3614 | _regulator_delay_helper(delay); |
77af1b26 | 3615 | |
31dfe686 | 3616 | if (best_val >= 0) { |
2f6c797f AL |
3617 | unsigned long data = best_val; |
3618 | ||
ded06a52 | 3619 | _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, |
2f6c797f AL |
3620 | (void *)data); |
3621 | } | |
ded06a52 | 3622 | |
31dfe686 | 3623 | out: |
eba41a5e | 3624 | trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val); |
75790251 MB |
3625 | |
3626 | return ret; | |
3627 | } | |
3628 | ||
f7efad10 CZ |
3629 | static int _regulator_do_set_suspend_voltage(struct regulator_dev *rdev, |
3630 | int min_uV, int max_uV, suspend_state_t state) | |
3631 | { | |
3632 | struct regulator_state *rstate; | |
3633 | int uV, sel; | |
3634 | ||
3635 | rstate = regulator_get_suspend_state(rdev, state); | |
3636 | if (rstate == NULL) | |
3637 | return -EINVAL; | |
3638 | ||
3639 | if (min_uV < rstate->min_uV) | |
3640 | min_uV = rstate->min_uV; | |
3641 | if (max_uV > rstate->max_uV) | |
3642 | max_uV = rstate->max_uV; | |
3643 | ||
3644 | sel = regulator_map_voltage(rdev, min_uV, max_uV); | |
3645 | if (sel < 0) | |
3646 | return sel; | |
3647 | ||
3648 | uV = rdev->desc->ops->list_voltage(rdev, sel); | |
3649 | if (uV >= min_uV && uV <= max_uV) | |
3650 | rstate->uV = uV; | |
3651 | ||
3652 | return 0; | |
3653 | } | |
3654 | ||
a9f226bc | 3655 | static int regulator_set_voltage_unlocked(struct regulator *regulator, |
c360a6df CZ |
3656 | int min_uV, int max_uV, |
3657 | suspend_state_t state) | |
414c70cb LG |
3658 | { |
3659 | struct regulator_dev *rdev = regulator->rdev; | |
c360a6df | 3660 | struct regulator_voltage *voltage = ®ulator->voltage[state]; |
95a3c23a | 3661 | int ret = 0; |
92d7a558 | 3662 | int old_min_uV, old_max_uV; |
c00dc359 | 3663 | int current_uV; |
414c70cb | 3664 | |
95a3c23a MB |
3665 | /* If we're setting the same range as last time the change |
3666 | * should be a noop (some cpufreq implementations use the same | |
3667 | * voltage for multiple frequencies, for example). | |
3668 | */ | |
c360a6df | 3669 | if (voltage->min_uV == min_uV && voltage->max_uV == max_uV) |
95a3c23a MB |
3670 | goto out; |
3671 | ||
c00dc359 | 3672 | /* If we're trying to set a range that overlaps the current voltage, |
d3fb9800 | 3673 | * return successfully even though the regulator does not support |
c00dc359 BA |
3674 | * changing the voltage. |
3675 | */ | |
8a34e979 | 3676 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) { |
d22b85a1 | 3677 | current_uV = regulator_get_voltage_rdev(rdev); |
c00dc359 | 3678 | if (min_uV <= current_uV && current_uV <= max_uV) { |
c360a6df CZ |
3679 | voltage->min_uV = min_uV; |
3680 | voltage->max_uV = max_uV; | |
c00dc359 BA |
3681 | goto out; |
3682 | } | |
3683 | } | |
3684 | ||
414c70cb | 3685 | /* sanity check */ |
e8eef82b MB |
3686 | if (!rdev->desc->ops->set_voltage && |
3687 | !rdev->desc->ops->set_voltage_sel) { | |
414c70cb LG |
3688 | ret = -EINVAL; |
3689 | goto out; | |
3690 | } | |
3691 | ||
3692 | /* constraints check */ | |
3693 | ret = regulator_check_voltage(rdev, &min_uV, &max_uV); | |
3694 | if (ret < 0) | |
3695 | goto out; | |
0d25d09d | 3696 | |
92d7a558 | 3697 | /* restore original values in case of error */ |
c360a6df CZ |
3698 | old_min_uV = voltage->min_uV; |
3699 | old_max_uV = voltage->max_uV; | |
3700 | voltage->min_uV = min_uV; | |
3701 | voltage->max_uV = max_uV; | |
3a93f2a9 | 3702 | |
9243a195 MP |
3703 | /* for not coupled regulators this will just set the voltage */ |
3704 | ret = regulator_balance_voltage(rdev, state); | |
70b46491 ST |
3705 | if (ret < 0) { |
3706 | voltage->min_uV = old_min_uV; | |
3707 | voltage->max_uV = old_max_uV; | |
3708 | } | |
05fda3b1 | 3709 | |
9243a195 | 3710 | out: |
9243a195 MP |
3711 | return ret; |
3712 | } | |
3713 | ||
d22b85a1 DO |
3714 | int regulator_set_voltage_rdev(struct regulator_dev *rdev, int min_uV, |
3715 | int max_uV, suspend_state_t state) | |
9243a195 MP |
3716 | { |
3717 | int best_supply_uV = 0; | |
3718 | int supply_change_uV = 0; | |
3719 | int ret; | |
3720 | ||
43fc99f2 MB |
3721 | if (rdev->supply && |
3722 | regulator_ops_is_valid(rdev->supply->rdev, | |
3723 | REGULATOR_CHANGE_VOLTAGE) && | |
2c2874b1 TR |
3724 | (rdev->desc->min_dropout_uV || !(rdev->desc->ops->get_voltage || |
3725 | rdev->desc->ops->get_voltage_sel))) { | |
fc42112c SH |
3726 | int current_supply_uV; |
3727 | int selector; | |
3728 | ||
3729 | selector = regulator_map_voltage(rdev, min_uV, max_uV); | |
3730 | if (selector < 0) { | |
3731 | ret = selector; | |
9243a195 | 3732 | goto out; |
fc42112c SH |
3733 | } |
3734 | ||
00cb9f4f | 3735 | best_supply_uV = _regulator_list_voltage(rdev, selector, 0); |
fc42112c SH |
3736 | if (best_supply_uV < 0) { |
3737 | ret = best_supply_uV; | |
9243a195 | 3738 | goto out; |
fc42112c SH |
3739 | } |
3740 | ||
3741 | best_supply_uV += rdev->desc->min_dropout_uV; | |
3742 | ||
d22b85a1 | 3743 | current_supply_uV = regulator_get_voltage_rdev(rdev->supply->rdev); |
fc42112c SH |
3744 | if (current_supply_uV < 0) { |
3745 | ret = current_supply_uV; | |
9243a195 | 3746 | goto out; |
fc42112c SH |
3747 | } |
3748 | ||
3749 | supply_change_uV = best_supply_uV - current_supply_uV; | |
3750 | } | |
3751 | ||
3752 | if (supply_change_uV > 0) { | |
3753 | ret = regulator_set_voltage_unlocked(rdev->supply, | |
c360a6df | 3754 | best_supply_uV, INT_MAX, state); |
fc42112c | 3755 | if (ret) { |
61aab5ad MM |
3756 | dev_err(&rdev->dev, "Failed to increase supply voltage: %pe\n", |
3757 | ERR_PTR(ret)); | |
9243a195 | 3758 | goto out; |
fc42112c SH |
3759 | } |
3760 | } | |
3761 | ||
f7efad10 CZ |
3762 | if (state == PM_SUSPEND_ON) |
3763 | ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); | |
3764 | else | |
3765 | ret = _regulator_do_set_suspend_voltage(rdev, min_uV, | |
3766 | max_uV, state); | |
92d7a558 | 3767 | if (ret < 0) |
9243a195 | 3768 | goto out; |
0d25d09d | 3769 | |
fc42112c SH |
3770 | if (supply_change_uV < 0) { |
3771 | ret = regulator_set_voltage_unlocked(rdev->supply, | |
c360a6df | 3772 | best_supply_uV, INT_MAX, state); |
fc42112c | 3773 | if (ret) |
61aab5ad MM |
3774 | dev_warn(&rdev->dev, "Failed to decrease supply voltage: %pe\n", |
3775 | ERR_PTR(ret)); | |
fc42112c SH |
3776 | /* No need to fail here */ |
3777 | ret = 0; | |
3778 | } | |
3779 | ||
414c70cb | 3780 | out: |
a9f226bc | 3781 | return ret; |
69686176 | 3782 | } |
3d7610e8 | 3783 | EXPORT_SYMBOL_GPL(regulator_set_voltage_rdev); |
69686176 | 3784 | |
85254bcf DO |
3785 | static int regulator_limit_voltage_step(struct regulator_dev *rdev, |
3786 | int *current_uV, int *min_uV) | |
3787 | { | |
3788 | struct regulation_constraints *constraints = rdev->constraints; | |
3789 | ||
3790 | /* Limit voltage change only if necessary */ | |
3791 | if (!constraints->max_uV_step || !_regulator_is_enabled(rdev)) | |
3792 | return 1; | |
3793 | ||
3794 | if (*current_uV < 0) { | |
d22b85a1 | 3795 | *current_uV = regulator_get_voltage_rdev(rdev); |
85254bcf DO |
3796 | |
3797 | if (*current_uV < 0) | |
3798 | return *current_uV; | |
3799 | } | |
3800 | ||
3801 | if (abs(*current_uV - *min_uV) <= constraints->max_uV_step) | |
3802 | return 1; | |
3803 | ||
3804 | /* Clamp target voltage within the given step */ | |
3805 | if (*current_uV < *min_uV) | |
3806 | *min_uV = min(*current_uV + constraints->max_uV_step, | |
3807 | *min_uV); | |
3808 | else | |
3809 | *min_uV = max(*current_uV - constraints->max_uV_step, | |
3810 | *min_uV); | |
3811 | ||
3812 | return 0; | |
3813 | } | |
3814 | ||
c054c6c7 MP |
3815 | static int regulator_get_optimal_voltage(struct regulator_dev *rdev, |
3816 | int *current_uV, | |
3817 | int *min_uV, int *max_uV, | |
3818 | suspend_state_t state, | |
3819 | int n_coupled) | |
3820 | { | |
3821 | struct coupling_desc *c_desc = &rdev->coupling_desc; | |
3822 | struct regulator_dev **c_rdevs = c_desc->coupled_rdevs; | |
3823 | struct regulation_constraints *constraints = rdev->constraints; | |
c054c6c7 MP |
3824 | int desired_min_uV = 0, desired_max_uV = INT_MAX; |
3825 | int max_current_uV = 0, min_current_uV = INT_MAX; | |
3826 | int highest_min_uV = 0, target_uV, possible_uV; | |
d8ca7d18 | 3827 | int i, ret, max_spread; |
c054c6c7 MP |
3828 | bool done; |
3829 | ||
3830 | *current_uV = -1; | |
3831 | ||
3832 | /* | |
3833 | * If there are no coupled regulators, simply set the voltage | |
3834 | * demanded by consumers. | |
3835 | */ | |
3836 | if (n_coupled == 1) { | |
3837 | /* | |
3838 | * If consumers don't provide any demands, set voltage | |
3839 | * to min_uV | |
3840 | */ | |
3841 | desired_min_uV = constraints->min_uV; | |
3842 | desired_max_uV = constraints->max_uV; | |
3843 | ||
3844 | ret = regulator_check_consumers(rdev, | |
3845 | &desired_min_uV, | |
3846 | &desired_max_uV, state); | |
3847 | if (ret < 0) | |
3848 | return ret; | |
3849 | ||
3850 | possible_uV = desired_min_uV; | |
3851 | done = true; | |
3852 | ||
3853 | goto finish; | |
3854 | } | |
3855 | ||
3856 | /* Find highest min desired voltage */ | |
3857 | for (i = 0; i < n_coupled; i++) { | |
3858 | int tmp_min = 0; | |
3859 | int tmp_max = INT_MAX; | |
3860 | ||
f8702f9e | 3861 | lockdep_assert_held_once(&c_rdevs[i]->mutex.base); |
c054c6c7 MP |
3862 | |
3863 | ret = regulator_check_consumers(c_rdevs[i], | |
3864 | &tmp_min, | |
3865 | &tmp_max, state); | |
3866 | if (ret < 0) | |
3867 | return ret; | |
3868 | ||
3869 | ret = regulator_check_voltage(c_rdevs[i], &tmp_min, &tmp_max); | |
3870 | if (ret < 0) | |
3871 | return ret; | |
69686176 | 3872 | |
c054c6c7 MP |
3873 | highest_min_uV = max(highest_min_uV, tmp_min); |
3874 | ||
3875 | if (i == 0) { | |
3876 | desired_min_uV = tmp_min; | |
3877 | desired_max_uV = tmp_max; | |
3878 | } | |
3879 | } | |
3880 | ||
d8ca7d18 DO |
3881 | max_spread = constraints->max_spread[0]; |
3882 | ||
c054c6c7 MP |
3883 | /* |
3884 | * Let target_uV be equal to the desired one if possible. | |
3885 | * If not, set it to minimum voltage, allowed by other coupled | |
3886 | * regulators. | |
3887 | */ | |
3888 | target_uV = max(desired_min_uV, highest_min_uV - max_spread); | |
3889 | ||
3890 | /* | |
3891 | * Find min and max voltages, which currently aren't violating | |
3892 | * max_spread. | |
3893 | */ | |
3894 | for (i = 1; i < n_coupled; i++) { | |
3895 | int tmp_act; | |
3896 | ||
3897 | if (!_regulator_is_enabled(c_rdevs[i])) | |
3898 | continue; | |
3899 | ||
d22b85a1 | 3900 | tmp_act = regulator_get_voltage_rdev(c_rdevs[i]); |
c054c6c7 MP |
3901 | if (tmp_act < 0) |
3902 | return tmp_act; | |
3903 | ||
3904 | min_current_uV = min(tmp_act, min_current_uV); | |
3905 | max_current_uV = max(tmp_act, max_current_uV); | |
3906 | } | |
3907 | ||
3908 | /* There aren't any other regulators enabled */ | |
3909 | if (max_current_uV == 0) { | |
3910 | possible_uV = target_uV; | |
3911 | } else { | |
3912 | /* | |
3913 | * Correct target voltage, so as it currently isn't | |
3914 | * violating max_spread | |
3915 | */ | |
3916 | possible_uV = max(target_uV, max_current_uV - max_spread); | |
3917 | possible_uV = min(possible_uV, min_current_uV + max_spread); | |
3918 | } | |
3919 | ||
3920 | if (possible_uV > desired_max_uV) | |
3921 | return -EINVAL; | |
3922 | ||
3923 | done = (possible_uV == target_uV); | |
3924 | desired_min_uV = possible_uV; | |
3925 | ||
3926 | finish: | |
85254bcf DO |
3927 | /* Apply max_uV_step constraint if necessary */ |
3928 | if (state == PM_SUSPEND_ON) { | |
3929 | ret = regulator_limit_voltage_step(rdev, current_uV, | |
3930 | &desired_min_uV); | |
3931 | if (ret < 0) | |
3932 | return ret; | |
3933 | ||
3934 | if (ret == 0) | |
3935 | done = false; | |
3936 | } | |
3937 | ||
c054c6c7 MP |
3938 | /* Set current_uV if wasn't done earlier in the code and if necessary */ |
3939 | if (n_coupled > 1 && *current_uV == -1) { | |
3940 | ||
3941 | if (_regulator_is_enabled(rdev)) { | |
d22b85a1 | 3942 | ret = regulator_get_voltage_rdev(rdev); |
c054c6c7 MP |
3943 | if (ret < 0) |
3944 | return ret; | |
3945 | ||
3946 | *current_uV = ret; | |
3947 | } else { | |
3948 | *current_uV = desired_min_uV; | |
3949 | } | |
3950 | } | |
3951 | ||
3952 | *min_uV = desired_min_uV; | |
3953 | *max_uV = desired_max_uV; | |
3954 | ||
3955 | return done; | |
3956 | } | |
3957 | ||
752db83a MS |
3958 | int regulator_do_balance_voltage(struct regulator_dev *rdev, |
3959 | suspend_state_t state, bool skip_coupled) | |
c054c6c7 MP |
3960 | { |
3961 | struct regulator_dev **c_rdevs; | |
3962 | struct regulator_dev *best_rdev; | |
3963 | struct coupling_desc *c_desc = &rdev->coupling_desc; | |
3964 | int i, ret, n_coupled, best_min_uV, best_max_uV, best_c_rdev; | |
c054c6c7 | 3965 | unsigned int delta, best_delta; |
d8ca7d18 DO |
3966 | unsigned long c_rdev_done = 0; |
3967 | bool best_c_rdev_done; | |
c054c6c7 MP |
3968 | |
3969 | c_rdevs = c_desc->coupled_rdevs; | |
752db83a | 3970 | n_coupled = skip_coupled ? 1 : c_desc->n_coupled; |
c054c6c7 MP |
3971 | |
3972 | /* | |
3973 | * Find the best possible voltage change on each loop. Leave the loop | |
3974 | * if there isn't any possible change. | |
3975 | */ | |
3976 | do { | |
3977 | best_c_rdev_done = false; | |
3978 | best_delta = 0; | |
3979 | best_min_uV = 0; | |
3980 | best_max_uV = 0; | |
3981 | best_c_rdev = 0; | |
3982 | best_rdev = NULL; | |
3983 | ||
3984 | /* | |
3985 | * Find highest difference between optimal voltage | |
3986 | * and current voltage. | |
3987 | */ | |
3988 | for (i = 0; i < n_coupled; i++) { | |
3989 | /* | |
3990 | * optimal_uV is the best voltage that can be set for | |
3991 | * i-th regulator at the moment without violating | |
3992 | * max_spread constraint in order to balance | |
3993 | * the coupled voltages. | |
3994 | */ | |
3995 | int optimal_uV = 0, optimal_max_uV = 0, current_uV = 0; | |
3996 | ||
d8ca7d18 | 3997 | if (test_bit(i, &c_rdev_done)) |
c054c6c7 MP |
3998 | continue; |
3999 | ||
4000 | ret = regulator_get_optimal_voltage(c_rdevs[i], | |
4001 | ¤t_uV, | |
4002 | &optimal_uV, | |
4003 | &optimal_max_uV, | |
4004 | state, n_coupled); | |
4005 | if (ret < 0) | |
4006 | goto out; | |
4007 | ||
4008 | delta = abs(optimal_uV - current_uV); | |
4009 | ||
4010 | if (delta && best_delta <= delta) { | |
4011 | best_c_rdev_done = ret; | |
4012 | best_delta = delta; | |
4013 | best_rdev = c_rdevs[i]; | |
4014 | best_min_uV = optimal_uV; | |
4015 | best_max_uV = optimal_max_uV; | |
4016 | best_c_rdev = i; | |
4017 | } | |
4018 | } | |
4019 | ||
4020 | /* Nothing to change, return successfully */ | |
4021 | if (!best_rdev) { | |
4022 | ret = 0; | |
4023 | goto out; | |
4024 | } | |
9243a195 | 4025 | |
c054c6c7 MP |
4026 | ret = regulator_set_voltage_rdev(best_rdev, best_min_uV, |
4027 | best_max_uV, state); | |
9243a195 | 4028 | |
c054c6c7 MP |
4029 | if (ret < 0) |
4030 | goto out; | |
4031 | ||
d8ca7d18 DO |
4032 | if (best_c_rdev_done) |
4033 | set_bit(best_c_rdev, &c_rdev_done); | |
c054c6c7 MP |
4034 | |
4035 | } while (n_coupled > 1); | |
4036 | ||
4037 | out: | |
69686176 MP |
4038 | return ret; |
4039 | } | |
4040 | ||
752db83a MS |
4041 | static int regulator_balance_voltage(struct regulator_dev *rdev, |
4042 | suspend_state_t state) | |
4043 | { | |
4044 | struct coupling_desc *c_desc = &rdev->coupling_desc; | |
4045 | struct regulator_coupler *coupler = c_desc->coupler; | |
4046 | bool skip_coupled = false; | |
4047 | ||
4048 | /* | |
4049 | * If system is in a state other than PM_SUSPEND_ON, don't check | |
4050 | * other coupled regulators. | |
4051 | */ | |
4052 | if (state != PM_SUSPEND_ON) | |
4053 | skip_coupled = true; | |
4054 | ||
4055 | if (c_desc->n_resolved < c_desc->n_coupled) { | |
4056 | rdev_err(rdev, "Not all coupled regulators registered\n"); | |
4057 | return -EPERM; | |
4058 | } | |
4059 | ||
4060 | /* Invoke custom balancer for customized couplers */ | |
4061 | if (coupler && coupler->balance_voltage) | |
4062 | return coupler->balance_voltage(coupler, rdev, state); | |
4063 | ||
4064 | return regulator_do_balance_voltage(rdev, state, skip_coupled); | |
4065 | } | |
4066 | ||
a9f226bc SH |
4067 | /** |
4068 | * regulator_set_voltage - set regulator output voltage | |
4069 | * @regulator: regulator source | |
4070 | * @min_uV: Minimum required voltage in uV | |
4071 | * @max_uV: Maximum acceptable voltage in uV | |
4072 | * | |
4073 | * Sets a voltage regulator to the desired output voltage. This can be set | |
4074 | * during any regulator state. IOW, regulator can be disabled or enabled. | |
4075 | * | |
4076 | * If the regulator is enabled then the voltage will change to the new value | |
4077 | * immediately otherwise if the regulator is disabled the regulator will | |
4078 | * output at the new voltage when enabled. | |
4079 | * | |
4080 | * NOTE: If the regulator is shared between several devices then the lowest | |
4081 | * request voltage that meets the system constraints will be used. | |
4082 | * Regulator system constraints must be set for this regulator before | |
4083 | * calling this function otherwise this call will fail. | |
4084 | */ | |
4085 | int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) | |
4086 | { | |
f8702f9e DO |
4087 | struct ww_acquire_ctx ww_ctx; |
4088 | int ret; | |
a9f226bc | 4089 | |
f8702f9e | 4090 | regulator_lock_dependent(regulator->rdev, &ww_ctx); |
a9f226bc | 4091 | |
c360a6df CZ |
4092 | ret = regulator_set_voltage_unlocked(regulator, min_uV, max_uV, |
4093 | PM_SUSPEND_ON); | |
a9f226bc | 4094 | |
f8702f9e | 4095 | regulator_unlock_dependent(regulator->rdev, &ww_ctx); |
a9f226bc | 4096 | |
414c70cb LG |
4097 | return ret; |
4098 | } | |
4099 | EXPORT_SYMBOL_GPL(regulator_set_voltage); | |
4100 | ||
f7efad10 CZ |
4101 | static inline int regulator_suspend_toggle(struct regulator_dev *rdev, |
4102 | suspend_state_t state, bool en) | |
4103 | { | |
4104 | struct regulator_state *rstate; | |
4105 | ||
4106 | rstate = regulator_get_suspend_state(rdev, state); | |
4107 | if (rstate == NULL) | |
4108 | return -EINVAL; | |
4109 | ||
4110 | if (!rstate->changeable) | |
4111 | return -EPERM; | |
4112 | ||
3edd79cf | 4113 | rstate->enabled = (en) ? ENABLE_IN_SUSPEND : DISABLE_IN_SUSPEND; |
f7efad10 CZ |
4114 | |
4115 | return 0; | |
4116 | } | |
4117 | ||
4118 | int regulator_suspend_enable(struct regulator_dev *rdev, | |
4119 | suspend_state_t state) | |
4120 | { | |
4121 | return regulator_suspend_toggle(rdev, state, true); | |
4122 | } | |
4123 | EXPORT_SYMBOL_GPL(regulator_suspend_enable); | |
4124 | ||
4125 | int regulator_suspend_disable(struct regulator_dev *rdev, | |
4126 | suspend_state_t state) | |
4127 | { | |
4128 | struct regulator *regulator; | |
4129 | struct regulator_voltage *voltage; | |
4130 | ||
4131 | /* | |
4132 | * if any consumer wants this regulator device keeping on in | |
4133 | * suspend states, don't set it as disabled. | |
4134 | */ | |
4135 | list_for_each_entry(regulator, &rdev->consumer_list, list) { | |
4136 | voltage = ®ulator->voltage[state]; | |
4137 | if (voltage->min_uV || voltage->max_uV) | |
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | return regulator_suspend_toggle(rdev, state, false); | |
4142 | } | |
4143 | EXPORT_SYMBOL_GPL(regulator_suspend_disable); | |
4144 | ||
4145 | static int _regulator_set_suspend_voltage(struct regulator *regulator, | |
4146 | int min_uV, int max_uV, | |
4147 | suspend_state_t state) | |
4148 | { | |
4149 | struct regulator_dev *rdev = regulator->rdev; | |
4150 | struct regulator_state *rstate; | |
4151 | ||
4152 | rstate = regulator_get_suspend_state(rdev, state); | |
4153 | if (rstate == NULL) | |
4154 | return -EINVAL; | |
4155 | ||
4156 | if (rstate->min_uV == rstate->max_uV) { | |
4157 | rdev_err(rdev, "The suspend voltage can't be changed!\n"); | |
4158 | return -EPERM; | |
4159 | } | |
4160 | ||
4161 | return regulator_set_voltage_unlocked(regulator, min_uV, max_uV, state); | |
4162 | } | |
4163 | ||
4164 | int regulator_set_suspend_voltage(struct regulator *regulator, int min_uV, | |
4165 | int max_uV, suspend_state_t state) | |
4166 | { | |
f8702f9e DO |
4167 | struct ww_acquire_ctx ww_ctx; |
4168 | int ret; | |
f7efad10 CZ |
4169 | |
4170 | /* PM_SUSPEND_ON is handled by regulator_set_voltage() */ | |
4171 | if (regulator_check_states(state) || state == PM_SUSPEND_ON) | |
4172 | return -EINVAL; | |
4173 | ||
f8702f9e | 4174 | regulator_lock_dependent(regulator->rdev, &ww_ctx); |
f7efad10 CZ |
4175 | |
4176 | ret = _regulator_set_suspend_voltage(regulator, min_uV, | |
4177 | max_uV, state); | |
4178 | ||
f8702f9e | 4179 | regulator_unlock_dependent(regulator->rdev, &ww_ctx); |
f7efad10 CZ |
4180 | |
4181 | return ret; | |
4182 | } | |
4183 | EXPORT_SYMBOL_GPL(regulator_set_suspend_voltage); | |
4184 | ||
88cd222b LW |
4185 | /** |
4186 | * regulator_set_voltage_time - get raise/fall time | |
4187 | * @regulator: regulator source | |
4188 | * @old_uV: starting voltage in microvolts | |
4189 | * @new_uV: target voltage in microvolts | |
4190 | * | |
4191 | * Provided with the starting and ending voltage, this function attempts to | |
4192 | * calculate the time in microseconds required to rise or fall to this new | |
4193 | * voltage. | |
4194 | */ | |
4195 | int regulator_set_voltage_time(struct regulator *regulator, | |
4196 | int old_uV, int new_uV) | |
4197 | { | |
272e2315 GX |
4198 | struct regulator_dev *rdev = regulator->rdev; |
4199 | const struct regulator_ops *ops = rdev->desc->ops; | |
88cd222b LW |
4200 | int old_sel = -1; |
4201 | int new_sel = -1; | |
4202 | int voltage; | |
4203 | int i; | |
4204 | ||
73e705bf MK |
4205 | if (ops->set_voltage_time) |
4206 | return ops->set_voltage_time(rdev, old_uV, new_uV); | |
4207 | else if (!ops->set_voltage_time_sel) | |
4208 | return _regulator_set_voltage_time(rdev, old_uV, new_uV); | |
4209 | ||
88cd222b | 4210 | /* Currently requires operations to do this */ |
73e705bf | 4211 | if (!ops->list_voltage || !rdev->desc->n_voltages) |
88cd222b LW |
4212 | return -EINVAL; |
4213 | ||
4214 | for (i = 0; i < rdev->desc->n_voltages; i++) { | |
4215 | /* We only look for exact voltage matches here */ | |
bdcd1177 CB |
4216 | if (i < rdev->desc->linear_min_sel) |
4217 | continue; | |
4218 | ||
ab97800e CB |
4219 | if (old_sel >= 0 && new_sel >= 0) |
4220 | break; | |
4221 | ||
88cd222b LW |
4222 | voltage = regulator_list_voltage(regulator, i); |
4223 | if (voltage < 0) | |
4224 | return -EINVAL; | |
4225 | if (voltage == 0) | |
4226 | continue; | |
4227 | if (voltage == old_uV) | |
4228 | old_sel = i; | |
4229 | if (voltage == new_uV) | |
4230 | new_sel = i; | |
4231 | } | |
4232 | ||
4233 | if (old_sel < 0 || new_sel < 0) | |
4234 | return -EINVAL; | |
4235 | ||
4236 | return ops->set_voltage_time_sel(rdev, old_sel, new_sel); | |
4237 | } | |
4238 | EXPORT_SYMBOL_GPL(regulator_set_voltage_time); | |
4239 | ||
98a175b6 | 4240 | /** |
296c6566 RD |
4241 | * regulator_set_voltage_time_sel - get raise/fall time |
4242 | * @rdev: regulator source device | |
98a175b6 YSB |
4243 | * @old_selector: selector for starting voltage |
4244 | * @new_selector: selector for target voltage | |
4245 | * | |
4246 | * Provided with the starting and target voltage selectors, this function | |
4247 | * returns time in microseconds required to rise or fall to this new voltage | |
4248 | * | |
f11d08c3 | 4249 | * Drivers providing ramp_delay in regulation_constraints can use this as their |
398715ab | 4250 | * set_voltage_time_sel() operation. |
98a175b6 YSB |
4251 | */ |
4252 | int regulator_set_voltage_time_sel(struct regulator_dev *rdev, | |
4253 | unsigned int old_selector, | |
4254 | unsigned int new_selector) | |
4255 | { | |
f11d08c3 | 4256 | int old_volt, new_volt; |
398715ab | 4257 | |
f11d08c3 AL |
4258 | /* sanity check */ |
4259 | if (!rdev->desc->ops->list_voltage) | |
4260 | return -EINVAL; | |
398715ab | 4261 | |
f11d08c3 AL |
4262 | old_volt = rdev->desc->ops->list_voltage(rdev, old_selector); |
4263 | new_volt = rdev->desc->ops->list_voltage(rdev, new_selector); | |
4264 | ||
73e705bf MK |
4265 | if (rdev->desc->ops->set_voltage_time) |
4266 | return rdev->desc->ops->set_voltage_time(rdev, old_volt, | |
4267 | new_volt); | |
4268 | else | |
4269 | return _regulator_set_voltage_time(rdev, old_volt, new_volt); | |
98a175b6 | 4270 | } |
b19dbf71 | 4271 | EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel); |
98a175b6 | 4272 | |
380d2b2d DO |
4273 | int regulator_sync_voltage_rdev(struct regulator_dev *rdev) |
4274 | { | |
4275 | int ret; | |
4276 | ||
4277 | regulator_lock(rdev); | |
4278 | ||
4279 | if (!rdev->desc->ops->set_voltage && | |
4280 | !rdev->desc->ops->set_voltage_sel) { | |
4281 | ret = -EINVAL; | |
4282 | goto out; | |
4283 | } | |
4284 | ||
4285 | /* balance only, if regulator is coupled */ | |
4286 | if (rdev->coupling_desc.n_coupled > 1) | |
4287 | ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
4288 | else | |
4289 | ret = -EOPNOTSUPP; | |
4290 | ||
4291 | out: | |
4292 | regulator_unlock(rdev); | |
4293 | return ret; | |
4294 | } | |
4295 | ||
606a2562 MB |
4296 | /** |
4297 | * regulator_sync_voltage - re-apply last regulator output voltage | |
4298 | * @regulator: regulator source | |
4299 | * | |
4300 | * Re-apply the last configured voltage. This is intended to be used | |
4301 | * where some external control source the consumer is cooperating with | |
4302 | * has caused the configured voltage to change. | |
4303 | */ | |
4304 | int regulator_sync_voltage(struct regulator *regulator) | |
4305 | { | |
4306 | struct regulator_dev *rdev = regulator->rdev; | |
c360a6df | 4307 | struct regulator_voltage *voltage = ®ulator->voltage[PM_SUSPEND_ON]; |
606a2562 MB |
4308 | int ret, min_uV, max_uV; |
4309 | ||
400d5a5d DO |
4310 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) |
4311 | return 0; | |
4312 | ||
66cf9a7e | 4313 | regulator_lock(rdev); |
606a2562 MB |
4314 | |
4315 | if (!rdev->desc->ops->set_voltage && | |
4316 | !rdev->desc->ops->set_voltage_sel) { | |
4317 | ret = -EINVAL; | |
4318 | goto out; | |
4319 | } | |
4320 | ||
4321 | /* This is only going to work if we've had a voltage configured. */ | |
c360a6df | 4322 | if (!voltage->min_uV && !voltage->max_uV) { |
606a2562 MB |
4323 | ret = -EINVAL; |
4324 | goto out; | |
4325 | } | |
4326 | ||
c360a6df CZ |
4327 | min_uV = voltage->min_uV; |
4328 | max_uV = voltage->max_uV; | |
606a2562 MB |
4329 | |
4330 | /* This should be a paranoia check... */ | |
4331 | ret = regulator_check_voltage(rdev, &min_uV, &max_uV); | |
4332 | if (ret < 0) | |
4333 | goto out; | |
4334 | ||
c360a6df | 4335 | ret = regulator_check_consumers(rdev, &min_uV, &max_uV, 0); |
606a2562 MB |
4336 | if (ret < 0) |
4337 | goto out; | |
4338 | ||
24be0c71 DO |
4339 | /* balance only, if regulator is coupled */ |
4340 | if (rdev->coupling_desc.n_coupled > 1) | |
4341 | ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON); | |
4342 | else | |
4343 | ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); | |
606a2562 MB |
4344 | |
4345 | out: | |
66cf9a7e | 4346 | regulator_unlock(rdev); |
606a2562 MB |
4347 | return ret; |
4348 | } | |
4349 | EXPORT_SYMBOL_GPL(regulator_sync_voltage); | |
4350 | ||
d22b85a1 | 4351 | int regulator_get_voltage_rdev(struct regulator_dev *rdev) |
414c70cb | 4352 | { |
bf5892a8 | 4353 | int sel, ret; |
fef95019 MB |
4354 | bool bypassed; |
4355 | ||
4356 | if (rdev->desc->ops->get_bypass) { | |
4357 | ret = rdev->desc->ops->get_bypass(rdev, &bypassed); | |
4358 | if (ret < 0) | |
4359 | return ret; | |
4360 | if (bypassed) { | |
4361 | /* if bypassed the regulator must have a supply */ | |
45389c47 JH |
4362 | if (!rdev->supply) { |
4363 | rdev_err(rdev, | |
4364 | "bypassed regulator has no supply!\n"); | |
4365 | return -EPROBE_DEFER; | |
4366 | } | |
fef95019 | 4367 | |
d22b85a1 | 4368 | return regulator_get_voltage_rdev(rdev->supply->rdev); |
fef95019 MB |
4369 | } |
4370 | } | |
476c2d83 MB |
4371 | |
4372 | if (rdev->desc->ops->get_voltage_sel) { | |
4373 | sel = rdev->desc->ops->get_voltage_sel(rdev); | |
4374 | if (sel < 0) | |
4375 | return sel; | |
bf5892a8 | 4376 | ret = rdev->desc->ops->list_voltage(rdev, sel); |
cb220d16 | 4377 | } else if (rdev->desc->ops->get_voltage) { |
bf5892a8 | 4378 | ret = rdev->desc->ops->get_voltage(rdev); |
f7df20ec MB |
4379 | } else if (rdev->desc->ops->list_voltage) { |
4380 | ret = rdev->desc->ops->list_voltage(rdev, 0); | |
5a523605 LD |
4381 | } else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) { |
4382 | ret = rdev->desc->fixed_uV; | |
e303996e | 4383 | } else if (rdev->supply) { |
d22b85a1 | 4384 | ret = regulator_get_voltage_rdev(rdev->supply->rdev); |
cf1ad559 MM |
4385 | } else if (rdev->supply_name) { |
4386 | return -EPROBE_DEFER; | |
cb220d16 | 4387 | } else { |
414c70cb | 4388 | return -EINVAL; |
cb220d16 | 4389 | } |
bf5892a8 | 4390 | |
cb220d16 AL |
4391 | if (ret < 0) |
4392 | return ret; | |
bf5892a8 | 4393 | return ret - rdev->constraints->uV_offset; |
414c70cb | 4394 | } |
3d7610e8 | 4395 | EXPORT_SYMBOL_GPL(regulator_get_voltage_rdev); |
414c70cb LG |
4396 | |
4397 | /** | |
4398 | * regulator_get_voltage - get regulator output voltage | |
4399 | * @regulator: regulator source | |
4400 | * | |
4401 | * This returns the current regulator voltage in uV. | |
4402 | * | |
4403 | * NOTE: If the regulator is disabled it will return the voltage value. This | |
4404 | * function should not be used to determine regulator state. | |
4405 | */ | |
4406 | int regulator_get_voltage(struct regulator *regulator) | |
4407 | { | |
f8702f9e | 4408 | struct ww_acquire_ctx ww_ctx; |
414c70cb LG |
4409 | int ret; |
4410 | ||
f8702f9e | 4411 | regulator_lock_dependent(regulator->rdev, &ww_ctx); |
d22b85a1 | 4412 | ret = regulator_get_voltage_rdev(regulator->rdev); |
f8702f9e | 4413 | regulator_unlock_dependent(regulator->rdev, &ww_ctx); |
414c70cb LG |
4414 | |
4415 | return ret; | |
4416 | } | |
4417 | EXPORT_SYMBOL_GPL(regulator_get_voltage); | |
4418 | ||
4419 | /** | |
4420 | * regulator_set_current_limit - set regulator output current limit | |
4421 | * @regulator: regulator source | |
ce0d10f8 | 4422 | * @min_uA: Minimum supported current in uA |
414c70cb LG |
4423 | * @max_uA: Maximum supported current in uA |
4424 | * | |
4425 | * Sets current sink to the desired output current. This can be set during | |
4426 | * any regulator state. IOW, regulator can be disabled or enabled. | |
4427 | * | |
4428 | * If the regulator is enabled then the current will change to the new value | |
4429 | * immediately otherwise if the regulator is disabled the regulator will | |
4430 | * output at the new current when enabled. | |
4431 | * | |
4432 | * NOTE: Regulator system constraints must be set for this regulator before | |
4433 | * calling this function otherwise this call will fail. | |
4434 | */ | |
4435 | int regulator_set_current_limit(struct regulator *regulator, | |
4436 | int min_uA, int max_uA) | |
4437 | { | |
4438 | struct regulator_dev *rdev = regulator->rdev; | |
4439 | int ret; | |
4440 | ||
66cf9a7e | 4441 | regulator_lock(rdev); |
414c70cb LG |
4442 | |
4443 | /* sanity check */ | |
4444 | if (!rdev->desc->ops->set_current_limit) { | |
4445 | ret = -EINVAL; | |
4446 | goto out; | |
4447 | } | |
4448 | ||
4449 | /* constraints check */ | |
4450 | ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); | |
4451 | if (ret < 0) | |
4452 | goto out; | |
4453 | ||
4454 | ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); | |
4455 | out: | |
66cf9a7e | 4456 | regulator_unlock(rdev); |
414c70cb LG |
4457 | return ret; |
4458 | } | |
4459 | EXPORT_SYMBOL_GPL(regulator_set_current_limit); | |
4460 | ||
7e4d9683 DA |
4461 | static int _regulator_get_current_limit_unlocked(struct regulator_dev *rdev) |
4462 | { | |
4463 | /* sanity check */ | |
4464 | if (!rdev->desc->ops->get_current_limit) | |
4465 | return -EINVAL; | |
4466 | ||
4467 | return rdev->desc->ops->get_current_limit(rdev); | |
4468 | } | |
4469 | ||
414c70cb LG |
4470 | static int _regulator_get_current_limit(struct regulator_dev *rdev) |
4471 | { | |
4472 | int ret; | |
4473 | ||
66cf9a7e | 4474 | regulator_lock(rdev); |
7e4d9683 | 4475 | ret = _regulator_get_current_limit_unlocked(rdev); |
66cf9a7e | 4476 | regulator_unlock(rdev); |
7e4d9683 | 4477 | |
414c70cb LG |
4478 | return ret; |
4479 | } | |
4480 | ||
4481 | /** | |
4482 | * regulator_get_current_limit - get regulator output current | |
4483 | * @regulator: regulator source | |
4484 | * | |
4485 | * This returns the current supplied by the specified current sink in uA. | |
4486 | * | |
4487 | * NOTE: If the regulator is disabled it will return the current value. This | |
4488 | * function should not be used to determine regulator state. | |
4489 | */ | |
4490 | int regulator_get_current_limit(struct regulator *regulator) | |
4491 | { | |
4492 | return _regulator_get_current_limit(regulator->rdev); | |
4493 | } | |
4494 | EXPORT_SYMBOL_GPL(regulator_get_current_limit); | |
4495 | ||
4496 | /** | |
4497 | * regulator_set_mode - set regulator operating mode | |
4498 | * @regulator: regulator source | |
4499 | * @mode: operating mode - one of the REGULATOR_MODE constants | |
4500 | * | |
4501 | * Set regulator operating mode to increase regulator efficiency or improve | |
4502 | * regulation performance. | |
4503 | * | |
4504 | * NOTE: Regulator system constraints must be set for this regulator before | |
4505 | * calling this function otherwise this call will fail. | |
4506 | */ | |
4507 | int regulator_set_mode(struct regulator *regulator, unsigned int mode) | |
4508 | { | |
4509 | struct regulator_dev *rdev = regulator->rdev; | |
4510 | int ret; | |
500b4ac9 | 4511 | int regulator_curr_mode; |
414c70cb | 4512 | |
66cf9a7e | 4513 | regulator_lock(rdev); |
414c70cb LG |
4514 | |
4515 | /* sanity check */ | |
4516 | if (!rdev->desc->ops->set_mode) { | |
4517 | ret = -EINVAL; | |
4518 | goto out; | |
4519 | } | |
4520 | ||
500b4ac9 SI |
4521 | /* return if the same mode is requested */ |
4522 | if (rdev->desc->ops->get_mode) { | |
4523 | regulator_curr_mode = rdev->desc->ops->get_mode(rdev); | |
4524 | if (regulator_curr_mode == mode) { | |
4525 | ret = 0; | |
4526 | goto out; | |
4527 | } | |
4528 | } | |
4529 | ||
414c70cb | 4530 | /* constraints check */ |
22c51b47 | 4531 | ret = regulator_mode_constrain(rdev, &mode); |
414c70cb LG |
4532 | if (ret < 0) |
4533 | goto out; | |
4534 | ||
4535 | ret = rdev->desc->ops->set_mode(rdev, mode); | |
4536 | out: | |
66cf9a7e | 4537 | regulator_unlock(rdev); |
414c70cb LG |
4538 | return ret; |
4539 | } | |
4540 | EXPORT_SYMBOL_GPL(regulator_set_mode); | |
4541 | ||
7e4d9683 DA |
4542 | static unsigned int _regulator_get_mode_unlocked(struct regulator_dev *rdev) |
4543 | { | |
4544 | /* sanity check */ | |
4545 | if (!rdev->desc->ops->get_mode) | |
4546 | return -EINVAL; | |
4547 | ||
4548 | return rdev->desc->ops->get_mode(rdev); | |
4549 | } | |
4550 | ||
414c70cb LG |
4551 | static unsigned int _regulator_get_mode(struct regulator_dev *rdev) |
4552 | { | |
4553 | int ret; | |
4554 | ||
66cf9a7e | 4555 | regulator_lock(rdev); |
7e4d9683 | 4556 | ret = _regulator_get_mode_unlocked(rdev); |
66cf9a7e | 4557 | regulator_unlock(rdev); |
7e4d9683 | 4558 | |
414c70cb LG |
4559 | return ret; |
4560 | } | |
4561 | ||
4562 | /** | |
4563 | * regulator_get_mode - get regulator operating mode | |
4564 | * @regulator: regulator source | |
4565 | * | |
4566 | * Get the current regulator operating mode. | |
4567 | */ | |
4568 | unsigned int regulator_get_mode(struct regulator *regulator) | |
4569 | { | |
4570 | return _regulator_get_mode(regulator->rdev); | |
4571 | } | |
4572 | EXPORT_SYMBOL_GPL(regulator_get_mode); | |
4573 | ||
7111c6d1 MV |
4574 | static int rdev_get_cached_err_flags(struct regulator_dev *rdev) |
4575 | { | |
4576 | int ret = 0; | |
4577 | ||
4578 | if (rdev->use_cached_err) { | |
4579 | spin_lock(&rdev->err_lock); | |
4580 | ret = rdev->cached_err; | |
4581 | spin_unlock(&rdev->err_lock); | |
4582 | } | |
4583 | return ret; | |
4584 | } | |
4585 | ||
1b5b4221 AH |
4586 | static int _regulator_get_error_flags(struct regulator_dev *rdev, |
4587 | unsigned int *flags) | |
4588 | { | |
7111c6d1 | 4589 | int cached_flags, ret = 0; |
1b5b4221 | 4590 | |
66cf9a7e | 4591 | regulator_lock(rdev); |
1b5b4221 | 4592 | |
7111c6d1 MV |
4593 | cached_flags = rdev_get_cached_err_flags(rdev); |
4594 | ||
4595 | if (rdev->desc->ops->get_error_flags) | |
4596 | ret = rdev->desc->ops->get_error_flags(rdev, flags); | |
4597 | else if (!rdev->use_cached_err) | |
1b5b4221 | 4598 | ret = -EINVAL; |
1b5b4221 | 4599 | |
7111c6d1 MV |
4600 | *flags |= cached_flags; |
4601 | ||
66cf9a7e | 4602 | regulator_unlock(rdev); |
7111c6d1 | 4603 | |
1b5b4221 AH |
4604 | return ret; |
4605 | } | |
4606 | ||
4607 | /** | |
4608 | * regulator_get_error_flags - get regulator error information | |
4609 | * @regulator: regulator source | |
4610 | * @flags: pointer to store error flags | |
4611 | * | |
4612 | * Get the current regulator error information. | |
4613 | */ | |
4614 | int regulator_get_error_flags(struct regulator *regulator, | |
4615 | unsigned int *flags) | |
4616 | { | |
4617 | return _regulator_get_error_flags(regulator->rdev, flags); | |
4618 | } | |
4619 | EXPORT_SYMBOL_GPL(regulator_get_error_flags); | |
4620 | ||
414c70cb | 4621 | /** |
e39ce48f | 4622 | * regulator_set_load - set regulator load |
414c70cb LG |
4623 | * @regulator: regulator source |
4624 | * @uA_load: load current | |
4625 | * | |
4626 | * Notifies the regulator core of a new device load. This is then used by | |
4627 | * DRMS (if enabled by constraints) to set the most efficient regulator | |
4628 | * operating mode for the new regulator loading. | |
4629 | * | |
4630 | * Consumer devices notify their supply regulator of the maximum power | |
4631 | * they will require (can be taken from device datasheet in the power | |
4632 | * consumption tables) when they change operational status and hence power | |
4633 | * state. Examples of operational state changes that can affect power | |
4634 | * consumption are :- | |
4635 | * | |
4636 | * o Device is opened / closed. | |
4637 | * o Device I/O is about to begin or has just finished. | |
4638 | * o Device is idling in between work. | |
4639 | * | |
4640 | * This information is also exported via sysfs to userspace. | |
4641 | * | |
4642 | * DRMS will sum the total requested load on the regulator and change | |
4643 | * to the most efficient operating mode if platform constraints allow. | |
4644 | * | |
5451781d DA |
4645 | * NOTE: when a regulator consumer requests to have a regulator |
4646 | * disabled then any load that consumer requested no longer counts | |
4647 | * toward the total requested load. If the regulator is re-enabled | |
4648 | * then the previously requested load will start counting again. | |
4649 | * | |
4650 | * If a regulator is an always-on regulator then an individual consumer's | |
4651 | * load will still be removed if that consumer is fully disabled. | |
4652 | * | |
e39ce48f | 4653 | * On error a negative errno is returned. |
414c70cb | 4654 | */ |
e39ce48f | 4655 | int regulator_set_load(struct regulator *regulator, int uA_load) |
414c70cb LG |
4656 | { |
4657 | struct regulator_dev *rdev = regulator->rdev; | |
5451781d DA |
4658 | int old_uA_load; |
4659 | int ret = 0; | |
d92d95b6 | 4660 | |
66cf9a7e | 4661 | regulator_lock(rdev); |
5451781d | 4662 | old_uA_load = regulator->uA_load; |
414c70cb | 4663 | regulator->uA_load = uA_load; |
5451781d DA |
4664 | if (regulator->enable_count && old_uA_load != uA_load) { |
4665 | ret = drms_uA_update(rdev); | |
4666 | if (ret < 0) | |
4667 | regulator->uA_load = old_uA_load; | |
4668 | } | |
66cf9a7e | 4669 | regulator_unlock(rdev); |
8460ef38 | 4670 | |
414c70cb LG |
4671 | return ret; |
4672 | } | |
e39ce48f | 4673 | EXPORT_SYMBOL_GPL(regulator_set_load); |
414c70cb | 4674 | |
f59c8f9f MB |
4675 | /** |
4676 | * regulator_allow_bypass - allow the regulator to go into bypass mode | |
4677 | * | |
4678 | * @regulator: Regulator to configure | |
9345dfb8 | 4679 | * @enable: enable or disable bypass mode |
f59c8f9f MB |
4680 | * |
4681 | * Allow the regulator to go into bypass mode if all other consumers | |
4682 | * for the regulator also enable bypass mode and the machine | |
4683 | * constraints allow this. Bypass mode means that the regulator is | |
4684 | * simply passing the input directly to the output with no regulation. | |
4685 | */ | |
4686 | int regulator_allow_bypass(struct regulator *regulator, bool enable) | |
4687 | { | |
4688 | struct regulator_dev *rdev = regulator->rdev; | |
48325655 | 4689 | const char *name = rdev_get_name(rdev); |
f59c8f9f MB |
4690 | int ret = 0; |
4691 | ||
4692 | if (!rdev->desc->ops->set_bypass) | |
4693 | return 0; | |
4694 | ||
8a34e979 | 4695 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_BYPASS)) |
f59c8f9f MB |
4696 | return 0; |
4697 | ||
66cf9a7e | 4698 | regulator_lock(rdev); |
f59c8f9f MB |
4699 | |
4700 | if (enable && !regulator->bypass) { | |
4701 | rdev->bypass_count++; | |
4702 | ||
4703 | if (rdev->bypass_count == rdev->open_count) { | |
48325655 CK |
4704 | trace_regulator_bypass_enable(name); |
4705 | ||
f59c8f9f MB |
4706 | ret = rdev->desc->ops->set_bypass(rdev, enable); |
4707 | if (ret != 0) | |
4708 | rdev->bypass_count--; | |
48325655 CK |
4709 | else |
4710 | trace_regulator_bypass_enable_complete(name); | |
f59c8f9f MB |
4711 | } |
4712 | ||
4713 | } else if (!enable && regulator->bypass) { | |
4714 | rdev->bypass_count--; | |
4715 | ||
4716 | if (rdev->bypass_count != rdev->open_count) { | |
48325655 CK |
4717 | trace_regulator_bypass_disable(name); |
4718 | ||
f59c8f9f MB |
4719 | ret = rdev->desc->ops->set_bypass(rdev, enable); |
4720 | if (ret != 0) | |
4721 | rdev->bypass_count++; | |
48325655 CK |
4722 | else |
4723 | trace_regulator_bypass_disable_complete(name); | |
f59c8f9f MB |
4724 | } |
4725 | } | |
4726 | ||
4727 | if (ret == 0) | |
4728 | regulator->bypass = enable; | |
4729 | ||
66cf9a7e | 4730 | regulator_unlock(rdev); |
f59c8f9f MB |
4731 | |
4732 | return ret; | |
4733 | } | |
4734 | EXPORT_SYMBOL_GPL(regulator_allow_bypass); | |
4735 | ||
414c70cb LG |
4736 | /** |
4737 | * regulator_register_notifier - register regulator event notifier | |
4738 | * @regulator: regulator source | |
69279fb9 | 4739 | * @nb: notifier block |
414c70cb LG |
4740 | * |
4741 | * Register notifier block to receive regulator events. | |
4742 | */ | |
4743 | int regulator_register_notifier(struct regulator *regulator, | |
4744 | struct notifier_block *nb) | |
4745 | { | |
4746 | return blocking_notifier_chain_register(®ulator->rdev->notifier, | |
4747 | nb); | |
4748 | } | |
4749 | EXPORT_SYMBOL_GPL(regulator_register_notifier); | |
4750 | ||
4751 | /** | |
4752 | * regulator_unregister_notifier - unregister regulator event notifier | |
4753 | * @regulator: regulator source | |
69279fb9 | 4754 | * @nb: notifier block |
414c70cb LG |
4755 | * |
4756 | * Unregister regulator event notifier block. | |
4757 | */ | |
4758 | int regulator_unregister_notifier(struct regulator *regulator, | |
4759 | struct notifier_block *nb) | |
4760 | { | |
4761 | return blocking_notifier_chain_unregister(®ulator->rdev->notifier, | |
4762 | nb); | |
4763 | } | |
4764 | EXPORT_SYMBOL_GPL(regulator_unregister_notifier); | |
4765 | ||
b136fb44 JC |
4766 | /* notify regulator consumers and downstream regulator consumers. |
4767 | * Note mutex must be held by caller. | |
4768 | */ | |
7179569a | 4769 | static int _notifier_call_chain(struct regulator_dev *rdev, |
414c70cb LG |
4770 | unsigned long event, void *data) |
4771 | { | |
414c70cb | 4772 | /* call rdev chain first */ |
7179569a | 4773 | return blocking_notifier_call_chain(&rdev->notifier, event, data); |
414c70cb LG |
4774 | } |
4775 | ||
4776 | /** | |
4777 | * regulator_bulk_get - get multiple regulator consumers | |
4778 | * | |
4779 | * @dev: Device to supply | |
4780 | * @num_consumers: Number of consumers to register | |
4781 | * @consumers: Configuration of consumers; clients are stored here. | |
4782 | * | |
4783 | * @return 0 on success, an errno on failure. | |
4784 | * | |
4785 | * This helper function allows drivers to get several regulator | |
4786 | * consumers in one operation. If any of the regulators cannot be | |
4787 | * acquired then any regulators that were allocated will be freed | |
4788 | * before returning to the caller. | |
4789 | */ | |
4790 | int regulator_bulk_get(struct device *dev, int num_consumers, | |
4791 | struct regulator_bulk_data *consumers) | |
4792 | { | |
4793 | int i; | |
4794 | int ret; | |
4795 | ||
4796 | for (i = 0; i < num_consumers; i++) | |
4797 | consumers[i].consumer = NULL; | |
4798 | ||
4799 | for (i = 0; i < num_consumers; i++) { | |
565f9b07 BA |
4800 | consumers[i].consumer = regulator_get(dev, |
4801 | consumers[i].supply); | |
414c70cb | 4802 | if (IS_ERR(consumers[i].consumer)) { |
6eabfc01 DA |
4803 | ret = dev_err_probe(dev, PTR_ERR(consumers[i].consumer), |
4804 | "Failed to get supply '%s'", | |
4805 | consumers[i].supply); | |
d511e8a7 | 4806 | consumers[i].consumer = NULL; |
414c70cb LG |
4807 | goto err; |
4808 | } | |
6eabfc01 DA |
4809 | |
4810 | if (consumers[i].init_load_uA > 0) { | |
4811 | ret = regulator_set_load(consumers[i].consumer, | |
4812 | consumers[i].init_load_uA); | |
4813 | if (ret) { | |
4814 | i++; | |
4815 | goto err; | |
4816 | } | |
4817 | } | |
414c70cb LG |
4818 | } |
4819 | ||
4820 | return 0; | |
4821 | ||
4822 | err: | |
b29c7690 | 4823 | while (--i >= 0) |
414c70cb LG |
4824 | regulator_put(consumers[i].consumer); |
4825 | ||
4826 | return ret; | |
4827 | } | |
4828 | EXPORT_SYMBOL_GPL(regulator_bulk_get); | |
4829 | ||
f21e0e81 MB |
4830 | static void regulator_bulk_enable_async(void *data, async_cookie_t cookie) |
4831 | { | |
4832 | struct regulator_bulk_data *bulk = data; | |
4833 | ||
4834 | bulk->ret = regulator_enable(bulk->consumer); | |
4835 | } | |
4836 | ||
414c70cb LG |
4837 | /** |
4838 | * regulator_bulk_enable - enable multiple regulator consumers | |
4839 | * | |
4840 | * @num_consumers: Number of consumers | |
4841 | * @consumers: Consumer data; clients are stored here. | |
4842 | * @return 0 on success, an errno on failure | |
4843 | * | |
4844 | * This convenience API allows consumers to enable multiple regulator | |
4845 | * clients in a single API call. If any consumers cannot be enabled | |
4846 | * then any others that were enabled will be disabled again prior to | |
4847 | * return. | |
4848 | */ | |
4849 | int regulator_bulk_enable(int num_consumers, | |
4850 | struct regulator_bulk_data *consumers) | |
4851 | { | |
2955b47d | 4852 | ASYNC_DOMAIN_EXCLUSIVE(async_domain); |
414c70cb | 4853 | int i; |
f21e0e81 | 4854 | int ret = 0; |
414c70cb | 4855 | |
6492bc1b | 4856 | for (i = 0; i < num_consumers; i++) { |
5451781d DA |
4857 | async_schedule_domain(regulator_bulk_enable_async, |
4858 | &consumers[i], &async_domain); | |
6492bc1b | 4859 | } |
f21e0e81 MB |
4860 | |
4861 | async_synchronize_full_domain(&async_domain); | |
4862 | ||
4863 | /* If any consumer failed we need to unwind any that succeeded */ | |
414c70cb | 4864 | for (i = 0; i < num_consumers; i++) { |
f21e0e81 MB |
4865 | if (consumers[i].ret != 0) { |
4866 | ret = consumers[i].ret; | |
414c70cb | 4867 | goto err; |
f21e0e81 | 4868 | } |
414c70cb LG |
4869 | } |
4870 | ||
4871 | return 0; | |
4872 | ||
4873 | err: | |
fbe31057 AH |
4874 | for (i = 0; i < num_consumers; i++) { |
4875 | if (consumers[i].ret < 0) | |
61aab5ad MM |
4876 | pr_err("Failed to enable %s: %pe\n", consumers[i].supply, |
4877 | ERR_PTR(consumers[i].ret)); | |
fbe31057 AH |
4878 | else |
4879 | regulator_disable(consumers[i].consumer); | |
4880 | } | |
414c70cb LG |
4881 | |
4882 | return ret; | |
4883 | } | |
4884 | EXPORT_SYMBOL_GPL(regulator_bulk_enable); | |
4885 | ||
4886 | /** | |
4887 | * regulator_bulk_disable - disable multiple regulator consumers | |
4888 | * | |
4889 | * @num_consumers: Number of consumers | |
4890 | * @consumers: Consumer data; clients are stored here. | |
4891 | * @return 0 on success, an errno on failure | |
4892 | * | |
4893 | * This convenience API allows consumers to disable multiple regulator | |
49e22632 SN |
4894 | * clients in a single API call. If any consumers cannot be disabled |
4895 | * then any others that were disabled will be enabled again prior to | |
414c70cb LG |
4896 | * return. |
4897 | */ | |
4898 | int regulator_bulk_disable(int num_consumers, | |
4899 | struct regulator_bulk_data *consumers) | |
4900 | { | |
4901 | int i; | |
01e86f49 | 4902 | int ret, r; |
414c70cb | 4903 | |
49e22632 | 4904 | for (i = num_consumers - 1; i >= 0; --i) { |
414c70cb LG |
4905 | ret = regulator_disable(consumers[i].consumer); |
4906 | if (ret != 0) | |
4907 | goto err; | |
4908 | } | |
4909 | ||
4910 | return 0; | |
4911 | ||
4912 | err: | |
61aab5ad | 4913 | pr_err("Failed to disable %s: %pe\n", consumers[i].supply, ERR_PTR(ret)); |
01e86f49 MB |
4914 | for (++i; i < num_consumers; ++i) { |
4915 | r = regulator_enable(consumers[i].consumer); | |
4916 | if (r != 0) | |
61aab5ad MM |
4917 | pr_err("Failed to re-enable %s: %pe\n", |
4918 | consumers[i].supply, ERR_PTR(r)); | |
01e86f49 | 4919 | } |
414c70cb LG |
4920 | |
4921 | return ret; | |
4922 | } | |
4923 | EXPORT_SYMBOL_GPL(regulator_bulk_disable); | |
4924 | ||
e1de2f42 DK |
4925 | /** |
4926 | * regulator_bulk_force_disable - force disable multiple regulator consumers | |
4927 | * | |
4928 | * @num_consumers: Number of consumers | |
4929 | * @consumers: Consumer data; clients are stored here. | |
4930 | * @return 0 on success, an errno on failure | |
4931 | * | |
4932 | * This convenience API allows consumers to forcibly disable multiple regulator | |
4933 | * clients in a single API call. | |
4934 | * NOTE: This should be used for situations when device damage will | |
4935 | * likely occur if the regulators are not disabled (e.g. over temp). | |
4936 | * Although regulator_force_disable function call for some consumers can | |
4937 | * return error numbers, the function is called for all consumers. | |
4938 | */ | |
4939 | int regulator_bulk_force_disable(int num_consumers, | |
4940 | struct regulator_bulk_data *consumers) | |
4941 | { | |
4942 | int i; | |
b8c77ff6 | 4943 | int ret = 0; |
e1de2f42 | 4944 | |
b8c77ff6 | 4945 | for (i = 0; i < num_consumers; i++) { |
e1de2f42 DK |
4946 | consumers[i].ret = |
4947 | regulator_force_disable(consumers[i].consumer); | |
4948 | ||
b8c77ff6 DT |
4949 | /* Store first error for reporting */ |
4950 | if (consumers[i].ret && !ret) | |
e1de2f42 | 4951 | ret = consumers[i].ret; |
e1de2f42 DK |
4952 | } |
4953 | ||
e1de2f42 DK |
4954 | return ret; |
4955 | } | |
4956 | EXPORT_SYMBOL_GPL(regulator_bulk_force_disable); | |
4957 | ||
414c70cb LG |
4958 | /** |
4959 | * regulator_bulk_free - free multiple regulator consumers | |
4960 | * | |
4961 | * @num_consumers: Number of consumers | |
4962 | * @consumers: Consumer data; clients are stored here. | |
4963 | * | |
4964 | * This convenience API allows consumers to free multiple regulator | |
4965 | * clients in a single API call. | |
4966 | */ | |
4967 | void regulator_bulk_free(int num_consumers, | |
4968 | struct regulator_bulk_data *consumers) | |
4969 | { | |
4970 | int i; | |
4971 | ||
4972 | for (i = 0; i < num_consumers; i++) { | |
4973 | regulator_put(consumers[i].consumer); | |
4974 | consumers[i].consumer = NULL; | |
4975 | } | |
4976 | } | |
4977 | EXPORT_SYMBOL_GPL(regulator_bulk_free); | |
4978 | ||
4979 | /** | |
4980 | * regulator_notifier_call_chain - call regulator event notifier | |
69279fb9 | 4981 | * @rdev: regulator source |
414c70cb | 4982 | * @event: notifier block |
69279fb9 | 4983 | * @data: callback-specific data. |
414c70cb LG |
4984 | * |
4985 | * Called by regulator drivers to notify clients a regulator event has | |
3bca239d | 4986 | * occurred. |
414c70cb LG |
4987 | */ |
4988 | int regulator_notifier_call_chain(struct regulator_dev *rdev, | |
4989 | unsigned long event, void *data) | |
4990 | { | |
4991 | _notifier_call_chain(rdev, event, data); | |
4992 | return NOTIFY_DONE; | |
4993 | ||
4994 | } | |
4995 | EXPORT_SYMBOL_GPL(regulator_notifier_call_chain); | |
4996 | ||
be721979 MB |
4997 | /** |
4998 | * regulator_mode_to_status - convert a regulator mode into a status | |
4999 | * | |
5000 | * @mode: Mode to convert | |
5001 | * | |
5002 | * Convert a regulator mode into a status. | |
5003 | */ | |
5004 | int regulator_mode_to_status(unsigned int mode) | |
5005 | { | |
5006 | switch (mode) { | |
5007 | case REGULATOR_MODE_FAST: | |
5008 | return REGULATOR_STATUS_FAST; | |
5009 | case REGULATOR_MODE_NORMAL: | |
5010 | return REGULATOR_STATUS_NORMAL; | |
5011 | case REGULATOR_MODE_IDLE: | |
5012 | return REGULATOR_STATUS_IDLE; | |
03ffcf3d | 5013 | case REGULATOR_MODE_STANDBY: |
be721979 MB |
5014 | return REGULATOR_STATUS_STANDBY; |
5015 | default: | |
1beaf762 | 5016 | return REGULATOR_STATUS_UNDEFINED; |
be721979 MB |
5017 | } |
5018 | } | |
5019 | EXPORT_SYMBOL_GPL(regulator_mode_to_status); | |
5020 | ||
39f802d6 TI |
5021 | static struct attribute *regulator_dev_attrs[] = { |
5022 | &dev_attr_name.attr, | |
5023 | &dev_attr_num_users.attr, | |
5024 | &dev_attr_type.attr, | |
5025 | &dev_attr_microvolts.attr, | |
5026 | &dev_attr_microamps.attr, | |
5027 | &dev_attr_opmode.attr, | |
5028 | &dev_attr_state.attr, | |
5029 | &dev_attr_status.attr, | |
5030 | &dev_attr_bypass.attr, | |
5031 | &dev_attr_requested_microamps.attr, | |
5032 | &dev_attr_min_microvolts.attr, | |
5033 | &dev_attr_max_microvolts.attr, | |
5034 | &dev_attr_min_microamps.attr, | |
5035 | &dev_attr_max_microamps.attr, | |
0f2d636e ZW |
5036 | &dev_attr_under_voltage.attr, |
5037 | &dev_attr_over_current.attr, | |
5038 | &dev_attr_regulation_out.attr, | |
5039 | &dev_attr_fail.attr, | |
5040 | &dev_attr_over_temp.attr, | |
5041 | &dev_attr_under_voltage_warn.attr, | |
5042 | &dev_attr_over_current_warn.attr, | |
5043 | &dev_attr_over_voltage_warn.attr, | |
5044 | &dev_attr_over_temp_warn.attr, | |
39f802d6 TI |
5045 | &dev_attr_suspend_standby_state.attr, |
5046 | &dev_attr_suspend_mem_state.attr, | |
5047 | &dev_attr_suspend_disk_state.attr, | |
5048 | &dev_attr_suspend_standby_microvolts.attr, | |
5049 | &dev_attr_suspend_mem_microvolts.attr, | |
5050 | &dev_attr_suspend_disk_microvolts.attr, | |
5051 | &dev_attr_suspend_standby_mode.attr, | |
5052 | &dev_attr_suspend_mem_mode.attr, | |
5053 | &dev_attr_suspend_disk_mode.attr, | |
5054 | NULL | |
5055 | }; | |
5056 | ||
7ad68e2f DB |
5057 | /* |
5058 | * To avoid cluttering sysfs (and memory) with useless state, only | |
5059 | * create attributes that can be meaningfully displayed. | |
5060 | */ | |
39f802d6 TI |
5061 | static umode_t regulator_attr_is_visible(struct kobject *kobj, |
5062 | struct attribute *attr, int idx) | |
7ad68e2f | 5063 | { |
39f802d6 | 5064 | struct device *dev = kobj_to_dev(kobj); |
83080a14 | 5065 | struct regulator_dev *rdev = dev_to_rdev(dev); |
272e2315 | 5066 | const struct regulator_ops *ops = rdev->desc->ops; |
39f802d6 TI |
5067 | umode_t mode = attr->mode; |
5068 | ||
5069 | /* these three are always present */ | |
5070 | if (attr == &dev_attr_name.attr || | |
5071 | attr == &dev_attr_num_users.attr || | |
5072 | attr == &dev_attr_type.attr) | |
5073 | return mode; | |
7ad68e2f DB |
5074 | |
5075 | /* some attributes need specific methods to be displayed */ | |
39f802d6 TI |
5076 | if (attr == &dev_attr_microvolts.attr) { |
5077 | if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) || | |
5078 | (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) || | |
5079 | (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) || | |
5080 | (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1)) | |
5081 | return mode; | |
5082 | return 0; | |
f59c8f9f | 5083 | } |
7ad68e2f | 5084 | |
39f802d6 TI |
5085 | if (attr == &dev_attr_microamps.attr) |
5086 | return ops->get_current_limit ? mode : 0; | |
5087 | ||
5088 | if (attr == &dev_attr_opmode.attr) | |
5089 | return ops->get_mode ? mode : 0; | |
5090 | ||
5091 | if (attr == &dev_attr_state.attr) | |
5092 | return (rdev->ena_pin || ops->is_enabled) ? mode : 0; | |
5093 | ||
5094 | if (attr == &dev_attr_status.attr) | |
5095 | return ops->get_status ? mode : 0; | |
5096 | ||
5097 | if (attr == &dev_attr_bypass.attr) | |
5098 | return ops->get_bypass ? mode : 0; | |
5099 | ||
0f2d636e ZW |
5100 | if (attr == &dev_attr_under_voltage.attr || |
5101 | attr == &dev_attr_over_current.attr || | |
5102 | attr == &dev_attr_regulation_out.attr || | |
5103 | attr == &dev_attr_fail.attr || | |
5104 | attr == &dev_attr_over_temp.attr || | |
5105 | attr == &dev_attr_under_voltage_warn.attr || | |
5106 | attr == &dev_attr_over_current_warn.attr || | |
5107 | attr == &dev_attr_over_voltage_warn.attr || | |
5108 | attr == &dev_attr_over_temp_warn.attr) | |
5109 | return ops->get_error_flags ? mode : 0; | |
5110 | ||
7ad68e2f | 5111 | /* constraints need specific supporting methods */ |
39f802d6 TI |
5112 | if (attr == &dev_attr_min_microvolts.attr || |
5113 | attr == &dev_attr_max_microvolts.attr) | |
5114 | return (ops->set_voltage || ops->set_voltage_sel) ? mode : 0; | |
5115 | ||
5116 | if (attr == &dev_attr_min_microamps.attr || | |
5117 | attr == &dev_attr_max_microamps.attr) | |
5118 | return ops->set_current_limit ? mode : 0; | |
5119 | ||
5120 | if (attr == &dev_attr_suspend_standby_state.attr || | |
5121 | attr == &dev_attr_suspend_mem_state.attr || | |
5122 | attr == &dev_attr_suspend_disk_state.attr) | |
5123 | return mode; | |
5124 | ||
5125 | if (attr == &dev_attr_suspend_standby_microvolts.attr || | |
5126 | attr == &dev_attr_suspend_mem_microvolts.attr || | |
5127 | attr == &dev_attr_suspend_disk_microvolts.attr) | |
5128 | return ops->set_suspend_voltage ? mode : 0; | |
5129 | ||
5130 | if (attr == &dev_attr_suspend_standby_mode.attr || | |
5131 | attr == &dev_attr_suspend_mem_mode.attr || | |
5132 | attr == &dev_attr_suspend_disk_mode.attr) | |
5133 | return ops->set_suspend_mode ? mode : 0; | |
5134 | ||
5135 | return mode; | |
5136 | } | |
5137 | ||
5138 | static const struct attribute_group regulator_dev_group = { | |
5139 | .attrs = regulator_dev_attrs, | |
5140 | .is_visible = regulator_attr_is_visible, | |
5141 | }; | |
5142 | ||
5143 | static const struct attribute_group *regulator_dev_groups[] = { | |
5144 | ®ulator_dev_group, | |
5145 | NULL | |
5146 | }; | |
7ad68e2f | 5147 | |
39f802d6 TI |
5148 | static void regulator_dev_release(struct device *dev) |
5149 | { | |
5150 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
29f5f486 MB |
5151 | |
5152 | kfree(rdev->constraints); | |
5153 | of_node_put(rdev->dev.of_node); | |
39f802d6 | 5154 | kfree(rdev); |
7ad68e2f DB |
5155 | } |
5156 | ||
1130e5b3 MB |
5157 | static void rdev_init_debugfs(struct regulator_dev *rdev) |
5158 | { | |
a9eaa813 GR |
5159 | struct device *parent = rdev->dev.parent; |
5160 | const char *rname = rdev_get_name(rdev); | |
5161 | char name[NAME_MAX]; | |
5162 | ||
5163 | /* Avoid duplicate debugfs directory names */ | |
5164 | if (parent && rname == rdev->desc->name) { | |
5165 | snprintf(name, sizeof(name), "%s-%s", dev_name(parent), | |
5166 | rname); | |
5167 | rname = name; | |
5168 | } | |
5169 | ||
5170 | rdev->debugfs = debugfs_create_dir(rname, debugfs_root); | |
24751434 | 5171 | if (!rdev->debugfs) { |
1130e5b3 | 5172 | rdev_warn(rdev, "Failed to create debugfs directory\n"); |
1130e5b3 MB |
5173 | return; |
5174 | } | |
5175 | ||
5176 | debugfs_create_u32("use_count", 0444, rdev->debugfs, | |
5177 | &rdev->use_count); | |
5178 | debugfs_create_u32("open_count", 0444, rdev->debugfs, | |
5179 | &rdev->open_count); | |
f59c8f9f MB |
5180 | debugfs_create_u32("bypass_count", 0444, rdev->debugfs, |
5181 | &rdev->bypass_count); | |
1130e5b3 MB |
5182 | } |
5183 | ||
5e3ca2b3 JMC |
5184 | static int regulator_register_resolve_supply(struct device *dev, void *data) |
5185 | { | |
7ddede6a JH |
5186 | struct regulator_dev *rdev = dev_to_rdev(dev); |
5187 | ||
5188 | if (regulator_resolve_supply(rdev)) | |
5189 | rdev_dbg(rdev, "unable to resolve supply\n"); | |
5190 | ||
5191 | return 0; | |
5e3ca2b3 JMC |
5192 | } |
5193 | ||
d8ca7d18 DO |
5194 | int regulator_coupler_register(struct regulator_coupler *coupler) |
5195 | { | |
5196 | mutex_lock(®ulator_list_mutex); | |
5197 | list_add_tail(&coupler->list, ®ulator_coupler_list); | |
5198 | mutex_unlock(®ulator_list_mutex); | |
5199 | ||
5200 | return 0; | |
5201 | } | |
5202 | ||
5203 | static struct regulator_coupler * | |
5204 | regulator_find_coupler(struct regulator_dev *rdev) | |
5205 | { | |
5206 | struct regulator_coupler *coupler; | |
5207 | int err; | |
5208 | ||
5209 | /* | |
5210 | * Note that regulators are appended to the list and the generic | |
5211 | * coupler is registered first, hence it will be attached at last | |
5212 | * if nobody cared. | |
5213 | */ | |
5214 | list_for_each_entry_reverse(coupler, ®ulator_coupler_list, list) { | |
5215 | err = coupler->attach_regulator(coupler, rdev); | |
5216 | if (!err) { | |
5217 | if (!coupler->balance_voltage && | |
5218 | rdev->coupling_desc.n_coupled > 2) | |
5219 | goto err_unsupported; | |
5220 | ||
5221 | return coupler; | |
5222 | } | |
5223 | ||
5224 | if (err < 0) | |
5225 | return ERR_PTR(err); | |
5226 | ||
5227 | if (err == 1) | |
5228 | continue; | |
5229 | ||
5230 | break; | |
5231 | } | |
5232 | ||
5233 | return ERR_PTR(-EINVAL); | |
5234 | ||
5235 | err_unsupported: | |
5236 | if (coupler->detach_regulator) | |
5237 | coupler->detach_regulator(coupler, rdev); | |
5238 | ||
5239 | rdev_err(rdev, | |
5240 | "Voltage balancing for multiple regulator couples is unimplemented\n"); | |
5241 | ||
5242 | return ERR_PTR(-EPERM); | |
5243 | } | |
5244 | ||
f9503385 | 5245 | static void regulator_resolve_coupling(struct regulator_dev *rdev) |
d3d64537 | 5246 | { |
d8ca7d18 | 5247 | struct regulator_coupler *coupler = rdev->coupling_desc.coupler; |
d3d64537 MP |
5248 | struct coupling_desc *c_desc = &rdev->coupling_desc; |
5249 | int n_coupled = c_desc->n_coupled; | |
5250 | struct regulator_dev *c_rdev; | |
5251 | int i; | |
5252 | ||
5253 | for (i = 1; i < n_coupled; i++) { | |
5254 | /* already resolved */ | |
5255 | if (c_desc->coupled_rdevs[i]) | |
5256 | continue; | |
5257 | ||
5258 | c_rdev = of_parse_coupled_regulator(rdev, i - 1); | |
5259 | ||
f9503385 DO |
5260 | if (!c_rdev) |
5261 | continue; | |
d3d64537 | 5262 | |
d8ca7d18 DO |
5263 | if (c_rdev->coupling_desc.coupler != coupler) { |
5264 | rdev_err(rdev, "coupler mismatch with %s\n", | |
5265 | rdev_get_name(c_rdev)); | |
5266 | return; | |
5267 | } | |
5268 | ||
f9503385 DO |
5269 | c_desc->coupled_rdevs[i] = c_rdev; |
5270 | c_desc->n_resolved++; | |
d3d64537 | 5271 | |
f9503385 DO |
5272 | regulator_resolve_coupling(c_rdev); |
5273 | } | |
d3d64537 MP |
5274 | } |
5275 | ||
6303f3e7 | 5276 | static void regulator_remove_coupling(struct regulator_dev *rdev) |
d3d64537 | 5277 | { |
d8ca7d18 | 5278 | struct regulator_coupler *coupler = rdev->coupling_desc.coupler; |
6303f3e7 DO |
5279 | struct coupling_desc *__c_desc, *c_desc = &rdev->coupling_desc; |
5280 | struct regulator_dev *__c_rdev, *c_rdev; | |
5281 | unsigned int __n_coupled, n_coupled; | |
5282 | int i, k; | |
d8ca7d18 | 5283 | int err; |
d3d64537 | 5284 | |
6303f3e7 | 5285 | n_coupled = c_desc->n_coupled; |
d3d64537 | 5286 | |
6303f3e7 DO |
5287 | for (i = 1; i < n_coupled; i++) { |
5288 | c_rdev = c_desc->coupled_rdevs[i]; | |
d3d64537 | 5289 | |
6303f3e7 DO |
5290 | if (!c_rdev) |
5291 | continue; | |
5292 | ||
5293 | regulator_lock(c_rdev); | |
5294 | ||
5295 | __c_desc = &c_rdev->coupling_desc; | |
5296 | __n_coupled = __c_desc->n_coupled; | |
5297 | ||
5298 | for (k = 1; k < __n_coupled; k++) { | |
5299 | __c_rdev = __c_desc->coupled_rdevs[k]; | |
5300 | ||
5301 | if (__c_rdev == rdev) { | |
5302 | __c_desc->coupled_rdevs[k] = NULL; | |
5303 | __c_desc->n_resolved--; | |
5304 | break; | |
5305 | } | |
5306 | } | |
5307 | ||
5308 | regulator_unlock(c_rdev); | |
5309 | ||
5310 | c_desc->coupled_rdevs[i] = NULL; | |
5311 | c_desc->n_resolved--; | |
5312 | } | |
d8ca7d18 DO |
5313 | |
5314 | if (coupler && coupler->detach_regulator) { | |
5315 | err = coupler->detach_regulator(coupler, rdev); | |
5316 | if (err) | |
61aab5ad MM |
5317 | rdev_err(rdev, "failed to detach from coupler: %pe\n", |
5318 | ERR_PTR(err)); | |
d8ca7d18 DO |
5319 | } |
5320 | ||
5321 | kfree(rdev->coupling_desc.coupled_rdevs); | |
5322 | rdev->coupling_desc.coupled_rdevs = NULL; | |
d3d64537 MP |
5323 | } |
5324 | ||
f9503385 | 5325 | static int regulator_init_coupling(struct regulator_dev *rdev) |
d3d64537 | 5326 | { |
7d819664 | 5327 | struct regulator_dev **coupled; |
d8ca7d18 | 5328 | int err, n_phandles; |
d3d64537 MP |
5329 | |
5330 | if (!IS_ENABLED(CONFIG_OF)) | |
5331 | n_phandles = 0; | |
5332 | else | |
5333 | n_phandles = of_get_n_coupled(rdev); | |
5334 | ||
7d819664 MM |
5335 | coupled = kcalloc(n_phandles + 1, sizeof(*coupled), GFP_KERNEL); |
5336 | if (!coupled) | |
d8ca7d18 | 5337 | return -ENOMEM; |
d3d64537 | 5338 | |
7d819664 MM |
5339 | rdev->coupling_desc.coupled_rdevs = coupled; |
5340 | ||
d3d64537 MP |
5341 | /* |
5342 | * Every regulator should always have coupling descriptor filled with | |
5343 | * at least pointer to itself. | |
5344 | */ | |
5345 | rdev->coupling_desc.coupled_rdevs[0] = rdev; | |
5346 | rdev->coupling_desc.n_coupled = n_phandles + 1; | |
5347 | rdev->coupling_desc.n_resolved++; | |
5348 | ||
5349 | /* regulator isn't coupled */ | |
5350 | if (n_phandles == 0) | |
5351 | return 0; | |
5352 | ||
d8ca7d18 | 5353 | if (!of_check_coupling_data(rdev)) |
d3d64537 | 5354 | return -EPERM; |
d3d64537 | 5355 | |
73a32129 | 5356 | mutex_lock(®ulator_list_mutex); |
d8ca7d18 | 5357 | rdev->coupling_desc.coupler = regulator_find_coupler(rdev); |
73a32129 MM |
5358 | mutex_unlock(®ulator_list_mutex); |
5359 | ||
d8ca7d18 DO |
5360 | if (IS_ERR(rdev->coupling_desc.coupler)) { |
5361 | err = PTR_ERR(rdev->coupling_desc.coupler); | |
61aab5ad | 5362 | rdev_err(rdev, "failed to get coupler: %pe\n", ERR_PTR(err)); |
d8ca7d18 | 5363 | return err; |
d3d64537 MP |
5364 | } |
5365 | ||
d8ca7d18 DO |
5366 | return 0; |
5367 | } | |
5368 | ||
5369 | static int generic_coupler_attach(struct regulator_coupler *coupler, | |
5370 | struct regulator_dev *rdev) | |
5371 | { | |
5372 | if (rdev->coupling_desc.n_coupled > 2) { | |
5373 | rdev_err(rdev, | |
5374 | "Voltage balancing for multiple regulator couples is unimplemented\n"); | |
d3d64537 | 5375 | return -EPERM; |
d8ca7d18 | 5376 | } |
d3d64537 | 5377 | |
e381bfe4 DO |
5378 | if (!rdev->constraints->always_on) { |
5379 | rdev_err(rdev, | |
5380 | "Coupling of a non always-on regulator is unimplemented\n"); | |
5381 | return -ENOTSUPP; | |
5382 | } | |
5383 | ||
d3d64537 MP |
5384 | return 0; |
5385 | } | |
5386 | ||
d8ca7d18 DO |
5387 | static struct regulator_coupler generic_regulator_coupler = { |
5388 | .attach_regulator = generic_coupler_attach, | |
5389 | }; | |
5390 | ||
414c70cb LG |
5391 | /** |
5392 | * regulator_register - register regulator | |
69279fb9 | 5393 | * @regulator_desc: regulator to register |
f47531b1 | 5394 | * @cfg: runtime configuration for regulator |
414c70cb LG |
5395 | * |
5396 | * Called by regulator drivers to register a regulator. | |
0384618a AL |
5397 | * Returns a valid pointer to struct regulator_dev on success |
5398 | * or an ERR_PTR() on error. | |
414c70cb | 5399 | */ |
65f26846 MB |
5400 | struct regulator_dev * |
5401 | regulator_register(const struct regulator_desc *regulator_desc, | |
1b3de223 | 5402 | const struct regulator_config *cfg) |
414c70cb | 5403 | { |
c172708d | 5404 | const struct regulator_init_data *init_data; |
1b3de223 | 5405 | struct regulator_config *config = NULL; |
72dca06f | 5406 | static atomic_t regulator_no = ATOMIC_INIT(-1); |
414c70cb | 5407 | struct regulator_dev *rdev; |
0edb040d LW |
5408 | bool dangling_cfg_gpiod = false; |
5409 | bool dangling_of_gpiod = false; | |
32c8fad4 | 5410 | struct device *dev; |
a5766f11 | 5411 | int ret, i; |
414c70cb | 5412 | |
0edb040d | 5413 | if (cfg == NULL) |
414c70cb | 5414 | return ERR_PTR(-EINVAL); |
0edb040d LW |
5415 | if (cfg->ena_gpiod) |
5416 | dangling_cfg_gpiod = true; | |
5417 | if (regulator_desc == NULL) { | |
5418 | ret = -EINVAL; | |
5419 | goto rinse; | |
5420 | } | |
414c70cb | 5421 | |
1b3de223 | 5422 | dev = cfg->dev; |
dcf70112 | 5423 | WARN_ON(!dev); |
32c8fad4 | 5424 | |
0edb040d LW |
5425 | if (regulator_desc->name == NULL || regulator_desc->ops == NULL) { |
5426 | ret = -EINVAL; | |
5427 | goto rinse; | |
5428 | } | |
414c70cb | 5429 | |
cd78dfc6 | 5430 | if (regulator_desc->type != REGULATOR_VOLTAGE && |
0edb040d LW |
5431 | regulator_desc->type != REGULATOR_CURRENT) { |
5432 | ret = -EINVAL; | |
5433 | goto rinse; | |
5434 | } | |
414c70cb | 5435 | |
476c2d83 MB |
5436 | /* Only one of each should be implemented */ |
5437 | WARN_ON(regulator_desc->ops->get_voltage && | |
5438 | regulator_desc->ops->get_voltage_sel); | |
e8eef82b MB |
5439 | WARN_ON(regulator_desc->ops->set_voltage && |
5440 | regulator_desc->ops->set_voltage_sel); | |
476c2d83 MB |
5441 | |
5442 | /* If we're using selectors we must implement list_voltage. */ | |
5443 | if (regulator_desc->ops->get_voltage_sel && | |
5444 | !regulator_desc->ops->list_voltage) { | |
0edb040d LW |
5445 | ret = -EINVAL; |
5446 | goto rinse; | |
476c2d83 | 5447 | } |
e8eef82b MB |
5448 | if (regulator_desc->ops->set_voltage_sel && |
5449 | !regulator_desc->ops->list_voltage) { | |
0edb040d LW |
5450 | ret = -EINVAL; |
5451 | goto rinse; | |
e8eef82b | 5452 | } |
476c2d83 | 5453 | |
414c70cb | 5454 | rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); |
0edb040d LW |
5455 | if (rdev == NULL) { |
5456 | ret = -ENOMEM; | |
5457 | goto rinse; | |
5458 | } | |
d3c73156 | 5459 | device_initialize(&rdev->dev); |
7111c6d1 | 5460 | spin_lock_init(&rdev->err_lock); |
414c70cb | 5461 | |
1b3de223 KK |
5462 | /* |
5463 | * Duplicate the config so the driver could override it after | |
5464 | * parsing init data. | |
5465 | */ | |
5466 | config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL); | |
5467 | if (config == NULL) { | |
0edb040d | 5468 | ret = -ENOMEM; |
d3c73156 | 5469 | goto clean; |
1b3de223 KK |
5470 | } |
5471 | ||
bfa21a0d | 5472 | init_data = regulator_of_get_init_data(dev, regulator_desc, config, |
a0c7b164 | 5473 | &rdev->dev.of_node); |
f8970d34 MF |
5474 | |
5475 | /* | |
5476 | * Sometimes not all resources are probed already so we need to take | |
5477 | * that into account. This happens most the time if the ena_gpiod comes | |
5478 | * from a gpio extender or something else. | |
5479 | */ | |
5480 | if (PTR_ERR(init_data) == -EPROBE_DEFER) { | |
f8970d34 | 5481 | ret = -EPROBE_DEFER; |
d3c73156 | 5482 | goto clean; |
f8970d34 MF |
5483 | } |
5484 | ||
0edb040d LW |
5485 | /* |
5486 | * We need to keep track of any GPIO descriptor coming from the | |
5487 | * device tree until we have handled it over to the core. If the | |
5488 | * config that was passed in to this function DOES NOT contain | |
5489 | * a descriptor, and the config after this call DOES contain | |
48f1b4ef | 5490 | * a descriptor, we definitely got one from parsing the device |
0edb040d LW |
5491 | * tree. |
5492 | */ | |
5493 | if (!cfg->ena_gpiod && config->ena_gpiod) | |
5494 | dangling_of_gpiod = true; | |
a0c7b164 MB |
5495 | if (!init_data) { |
5496 | init_data = config->init_data; | |
5497 | rdev->dev.of_node = of_node_get(config->of_node); | |
5498 | } | |
5499 | ||
f8702f9e | 5500 | ww_mutex_init(&rdev->mutex, ®ulator_ww_class); |
c172708d | 5501 | rdev->reg_data = config->driver_data; |
414c70cb LG |
5502 | rdev->owner = regulator_desc->owner; |
5503 | rdev->desc = regulator_desc; | |
3a4b0a07 MB |
5504 | if (config->regmap) |
5505 | rdev->regmap = config->regmap; | |
52b84dac | 5506 | else if (dev_get_regmap(dev, NULL)) |
3a4b0a07 | 5507 | rdev->regmap = dev_get_regmap(dev, NULL); |
52b84dac AC |
5508 | else if (dev->parent) |
5509 | rdev->regmap = dev_get_regmap(dev->parent, NULL); | |
414c70cb | 5510 | INIT_LIST_HEAD(&rdev->consumer_list); |
414c70cb | 5511 | INIT_LIST_HEAD(&rdev->list); |
414c70cb | 5512 | BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); |
da07ecd9 | 5513 | INIT_DELAYED_WORK(&rdev->disable_work, regulator_disable_work); |
414c70cb | 5514 | |
8a866d52 CK |
5515 | /* set regulator constraints */ |
5516 | if (init_data) | |
5517 | rdev->constraints = kmemdup(&init_data->constraints, | |
5518 | sizeof(*rdev->constraints), | |
5519 | GFP_KERNEL); | |
5520 | else | |
5521 | rdev->constraints = kzalloc(sizeof(*rdev->constraints), | |
5522 | GFP_KERNEL); | |
5523 | if (!rdev->constraints) { | |
5524 | ret = -ENOMEM; | |
5525 | goto clean; | |
5526 | } | |
5527 | ||
5528 | if (init_data && init_data->supply_regulator) | |
5529 | rdev->supply_name = init_data->supply_regulator; | |
5530 | else if (regulator_desc->supply_name) | |
5531 | rdev->supply_name = regulator_desc->supply_name; | |
5532 | ||
5533 | if ((rdev->supply_name && !rdev->supply) && | |
5534 | (rdev->constraints->always_on || | |
5535 | rdev->constraints->boot_on)) { | |
5536 | /* Try to resolve the name of the supplying regulator here first | |
5537 | * so we prevent double-initializing the regulator, which may | |
5538 | * cause timing-specific voltage brownouts/glitches that are | |
5539 | * hard to debug. | |
5540 | */ | |
5541 | ret = regulator_resolve_supply(rdev); | |
5542 | if (ret) | |
5543 | rdev_dbg(rdev, "unable to resolve supply early: %pe\n", | |
5544 | ERR_PTR(ret)); | |
5545 | } | |
5546 | ||
5547 | /* perform any regulator specific init */ | |
9a8f5e07 | 5548 | if (init_data && init_data->regulator_init) { |
a5766f11 | 5549 | ret = init_data->regulator_init(rdev->reg_data); |
4fca9545 DB |
5550 | if (ret < 0) |
5551 | goto clean; | |
a5766f11 LG |
5552 | } |
5553 | ||
541d052d | 5554 | if (config->ena_gpiod) { |
daad134d KA |
5555 | ret = regulator_ena_gpio_request(rdev, config); |
5556 | if (ret != 0) { | |
61aab5ad MM |
5557 | rdev_err(rdev, "Failed to request enable GPIO: %pe\n", |
5558 | ERR_PTR(ret)); | |
32165230 | 5559 | goto clean; |
daad134d | 5560 | } |
0edb040d LW |
5561 | /* The regulator core took over the GPIO descriptor */ |
5562 | dangling_cfg_gpiod = false; | |
5563 | dangling_of_gpiod = false; | |
daad134d KA |
5564 | } |
5565 | ||
a5766f11 | 5566 | /* register with sysfs */ |
414c70cb | 5567 | rdev->dev.class = ®ulator_class; |
a5766f11 | 5568 | rdev->dev.parent = dev; |
72dca06f | 5569 | dev_set_name(&rdev->dev, "regulator.%lu", |
39138818 | 5570 | (unsigned long) atomic_inc_return(®ulator_no)); |
9177514c | 5571 | dev_set_drvdata(&rdev->dev, rdev); |
a5766f11 | 5572 | |
57a6ad48 | 5573 | ret = set_machine_constraints(rdev); |
aea6cb99 MM |
5574 | if (ret == -EPROBE_DEFER) { |
5575 | /* Regulator might be in bypass mode and so needs its supply | |
69b8821e SK |
5576 | * to set the constraints |
5577 | */ | |
aea6cb99 MM |
5578 | /* FIXME: this currently triggers a chicken-and-egg problem |
5579 | * when creating -SUPPLY symlink in sysfs to a regulator | |
69b8821e SK |
5580 | * that is just being created |
5581 | */ | |
0917c9db MM |
5582 | rdev_dbg(rdev, "will resolve supply early: %s\n", |
5583 | rdev->supply_name); | |
aea6cb99 MM |
5584 | ret = regulator_resolve_supply(rdev); |
5585 | if (!ret) | |
57a6ad48 | 5586 | ret = set_machine_constraints(rdev); |
aea6cb99 MM |
5587 | else |
5588 | rdev_dbg(rdev, "unable to resolve supply early: %pe\n", | |
5589 | ERR_PTR(ret)); | |
5590 | } | |
45389c47 JH |
5591 | if (ret < 0) |
5592 | goto wash; | |
5593 | ||
f9503385 DO |
5594 | ret = regulator_init_coupling(rdev); |
5595 | if (ret < 0) | |
d3d64537 MP |
5596 | goto wash; |
5597 | ||
a5766f11 | 5598 | /* add consumers devices */ |
9a8f5e07 MB |
5599 | if (init_data) { |
5600 | for (i = 0; i < init_data->num_consumer_supplies; i++) { | |
5601 | ret = set_consumer_device_supply(rdev, | |
9a8f5e07 | 5602 | init_data->consumer_supplies[i].dev_name, |
23c2f041 | 5603 | init_data->consumer_supplies[i].supply); |
9a8f5e07 MB |
5604 | if (ret < 0) { |
5605 | dev_err(dev, "Failed to set supply %s\n", | |
5606 | init_data->consumer_supplies[i].supply); | |
5607 | goto unset_supplies; | |
5608 | } | |
23c2f041 | 5609 | } |
414c70cb | 5610 | } |
a5766f11 | 5611 | |
fd086045 MK |
5612 | if (!rdev->desc->ops->get_voltage && |
5613 | !rdev->desc->ops->list_voltage && | |
5614 | !rdev->desc->fixed_uV) | |
5615 | rdev->is_switch = true; | |
5616 | ||
9177514c VZ |
5617 | ret = device_add(&rdev->dev); |
5618 | if (ret != 0) | |
c438b9d0 | 5619 | goto unset_supplies; |
c438b9d0 | 5620 | |
1130e5b3 | 5621 | rdev_init_debugfs(rdev); |
5e3ca2b3 | 5622 | |
f9503385 DO |
5623 | /* try to resolve regulators coupling since a new one was registered */ |
5624 | mutex_lock(®ulator_list_mutex); | |
5625 | regulator_resolve_coupling(rdev); | |
5626 | mutex_unlock(®ulator_list_mutex); | |
5627 | ||
5e3ca2b3 JMC |
5628 | /* try to resolve regulators supply since a new one was registered */ |
5629 | class_for_each_device(®ulator_class, NULL, NULL, | |
5630 | regulator_register_resolve_supply); | |
1b3de223 | 5631 | kfree(config); |
414c70cb | 5632 | return rdev; |
4fca9545 | 5633 | |
d4033b54 | 5634 | unset_supplies: |
45389c47 | 5635 | mutex_lock(®ulator_list_mutex); |
d4033b54 | 5636 | unset_regulator_supplies(rdev); |
d8ca7d18 | 5637 | regulator_remove_coupling(rdev); |
45389c47 | 5638 | mutex_unlock(®ulator_list_mutex); |
32165230 | 5639 | wash: |
26c2c997 | 5640 | kfree(rdev->coupling_desc.coupled_rdevs); |
45389c47 | 5641 | mutex_lock(®ulator_list_mutex); |
32165230 | 5642 | regulator_ena_gpio_free(rdev); |
45389c47 | 5643 | mutex_unlock(®ulator_list_mutex); |
4fca9545 | 5644 | clean: |
0edb040d LW |
5645 | if (dangling_of_gpiod) |
5646 | gpiod_put(config->ena_gpiod); | |
a2151374 | 5647 | kfree(config); |
d3c73156 | 5648 | put_device(&rdev->dev); |
0edb040d LW |
5649 | rinse: |
5650 | if (dangling_cfg_gpiod) | |
5651 | gpiod_put(cfg->ena_gpiod); | |
a2151374 | 5652 | return ERR_PTR(ret); |
414c70cb LG |
5653 | } |
5654 | EXPORT_SYMBOL_GPL(regulator_register); | |
5655 | ||
5656 | /** | |
5657 | * regulator_unregister - unregister regulator | |
69279fb9 | 5658 | * @rdev: regulator to unregister |
414c70cb LG |
5659 | * |
5660 | * Called by regulator drivers to unregister a regulator. | |
5661 | */ | |
5662 | void regulator_unregister(struct regulator_dev *rdev) | |
5663 | { | |
5664 | if (rdev == NULL) | |
5665 | return; | |
5666 | ||
891636ea MB |
5667 | if (rdev->supply) { |
5668 | while (rdev->use_count--) | |
5669 | regulator_disable(rdev->supply); | |
e032b376 | 5670 | regulator_put(rdev->supply); |
891636ea | 5671 | } |
ff9b34b6 | 5672 | |
06377301 CK |
5673 | flush_work(&rdev->disable_work.work); |
5674 | ||
414c70cb | 5675 | mutex_lock(®ulator_list_mutex); |
ff9b34b6 | 5676 | |
1130e5b3 | 5677 | debugfs_remove_recursive(rdev->debugfs); |
6bf87d17 | 5678 | WARN_ON(rdev->open_count); |
6303f3e7 | 5679 | regulator_remove_coupling(rdev); |
0f1d747b | 5680 | unset_regulator_supplies(rdev); |
414c70cb | 5681 | list_del(&rdev->list); |
f19b00da | 5682 | regulator_ena_gpio_free(rdev); |
58fb5cf5 | 5683 | device_unregister(&rdev->dev); |
ff9b34b6 DO |
5684 | |
5685 | mutex_unlock(®ulator_list_mutex); | |
414c70cb LG |
5686 | } |
5687 | EXPORT_SYMBOL_GPL(regulator_unregister); | |
5688 | ||
f7efad10 | 5689 | #ifdef CONFIG_SUSPEND |
414c70cb | 5690 | /** |
0380cf7d | 5691 | * regulator_suspend - prepare regulators for system wide suspend |
1efef7cc | 5692 | * @dev: ``&struct device`` pointer that is passed to _regulator_suspend() |
414c70cb LG |
5693 | * |
5694 | * Configure each regulator with it's suspend operating parameters for state. | |
414c70cb | 5695 | */ |
0380cf7d | 5696 | static int regulator_suspend(struct device *dev) |
414c70cb | 5697 | { |
cd7e36ab | 5698 | struct regulator_dev *rdev = dev_to_rdev(dev); |
f7efad10 | 5699 | suspend_state_t state = pm_suspend_target_state; |
cd7e36ab | 5700 | int ret; |
0955f5be SB |
5701 | const struct regulator_state *rstate; |
5702 | ||
5703 | rstate = regulator_get_suspend_state_check(rdev, state); | |
5704 | if (!rstate) | |
5705 | return 0; | |
cd7e36ab MS |
5706 | |
5707 | regulator_lock(rdev); | |
0955f5be | 5708 | ret = __suspend_set_state(rdev, rstate); |
cd7e36ab | 5709 | regulator_unlock(rdev); |
414c70cb | 5710 | |
cd7e36ab | 5711 | return ret; |
85f3b431 | 5712 | } |
d3e4eccb | 5713 | |
cd7e36ab | 5714 | static int regulator_resume(struct device *dev) |
85f3b431 | 5715 | { |
cd7e36ab | 5716 | suspend_state_t state = pm_suspend_target_state; |
85f3b431 | 5717 | struct regulator_dev *rdev = dev_to_rdev(dev); |
f7efad10 | 5718 | struct regulator_state *rstate; |
cd7e36ab | 5719 | int ret = 0; |
f7efad10 | 5720 | |
cd7e36ab | 5721 | rstate = regulator_get_suspend_state(rdev, state); |
f7efad10 | 5722 | if (rstate == NULL) |
35b5f14e | 5723 | return 0; |
414c70cb | 5724 | |
0955f5be SB |
5725 | /* Avoid grabbing the lock if we don't need to */ |
5726 | if (!rdev->desc->ops->resume) | |
5727 | return 0; | |
5728 | ||
66cf9a7e | 5729 | regulator_lock(rdev); |
85f3b431 | 5730 | |
0955f5be SB |
5731 | if (rstate->enabled == ENABLE_IN_SUSPEND || |
5732 | rstate->enabled == DISABLE_IN_SUSPEND) | |
0380cf7d | 5733 | ret = rdev->desc->ops->resume(rdev); |
f7efad10 | 5734 | |
66cf9a7e | 5735 | regulator_unlock(rdev); |
85f3b431 | 5736 | |
f7efad10 | 5737 | return ret; |
414c70cb | 5738 | } |
f7efad10 CZ |
5739 | #else /* !CONFIG_SUSPEND */ |
5740 | ||
0380cf7d | 5741 | #define regulator_suspend NULL |
5742 | #define regulator_resume NULL | |
f7efad10 CZ |
5743 | |
5744 | #endif /* !CONFIG_SUSPEND */ | |
5745 | ||
5746 | #ifdef CONFIG_PM | |
5747 | static const struct dev_pm_ops __maybe_unused regulator_pm_ops = { | |
0380cf7d | 5748 | .suspend = regulator_suspend, |
5749 | .resume = regulator_resume, | |
f7efad10 CZ |
5750 | }; |
5751 | #endif | |
5752 | ||
285c22de | 5753 | struct class regulator_class = { |
f7efad10 CZ |
5754 | .name = "regulator", |
5755 | .dev_release = regulator_dev_release, | |
5756 | .dev_groups = regulator_dev_groups, | |
5757 | #ifdef CONFIG_PM | |
5758 | .pm = ®ulator_pm_ops, | |
5759 | #endif | |
5760 | }; | |
ca725561 MB |
5761 | /** |
5762 | * regulator_has_full_constraints - the system has fully specified constraints | |
5763 | * | |
5764 | * Calling this function will cause the regulator API to disable all | |
5765 | * regulators which have a zero use count and don't have an always_on | |
5766 | * constraint in a late_initcall. | |
5767 | * | |
5768 | * The intention is that this will become the default behaviour in a | |
5769 | * future kernel release so users are encouraged to use this facility | |
5770 | * now. | |
5771 | */ | |
5772 | void regulator_has_full_constraints(void) | |
5773 | { | |
5774 | has_full_constraints = 1; | |
5775 | } | |
5776 | EXPORT_SYMBOL_GPL(regulator_has_full_constraints); | |
5777 | ||
414c70cb LG |
5778 | /** |
5779 | * rdev_get_drvdata - get rdev regulator driver data | |
69279fb9 | 5780 | * @rdev: regulator |
414c70cb LG |
5781 | * |
5782 | * Get rdev regulator driver private data. This call can be used in the | |
5783 | * regulator driver context. | |
5784 | */ | |
5785 | void *rdev_get_drvdata(struct regulator_dev *rdev) | |
5786 | { | |
5787 | return rdev->reg_data; | |
5788 | } | |
5789 | EXPORT_SYMBOL_GPL(rdev_get_drvdata); | |
5790 | ||
5791 | /** | |
5792 | * regulator_get_drvdata - get regulator driver data | |
5793 | * @regulator: regulator | |
5794 | * | |
5795 | * Get regulator driver private data. This call can be used in the consumer | |
5796 | * driver context when non API regulator specific functions need to be called. | |
5797 | */ | |
5798 | void *regulator_get_drvdata(struct regulator *regulator) | |
5799 | { | |
5800 | return regulator->rdev->reg_data; | |
5801 | } | |
5802 | EXPORT_SYMBOL_GPL(regulator_get_drvdata); | |
5803 | ||
5804 | /** | |
5805 | * regulator_set_drvdata - set regulator driver data | |
5806 | * @regulator: regulator | |
5807 | * @data: data | |
5808 | */ | |
5809 | void regulator_set_drvdata(struct regulator *regulator, void *data) | |
5810 | { | |
5811 | regulator->rdev->reg_data = data; | |
5812 | } | |
5813 | EXPORT_SYMBOL_GPL(regulator_set_drvdata); | |
5814 | ||
5815 | /** | |
d73e873b | 5816 | * rdev_get_id - get regulator ID |
69279fb9 | 5817 | * @rdev: regulator |
414c70cb LG |
5818 | */ |
5819 | int rdev_get_id(struct regulator_dev *rdev) | |
5820 | { | |
5821 | return rdev->desc->id; | |
5822 | } | |
5823 | EXPORT_SYMBOL_GPL(rdev_get_id); | |
5824 | ||
a5766f11 LG |
5825 | struct device *rdev_get_dev(struct regulator_dev *rdev) |
5826 | { | |
5827 | return &rdev->dev; | |
5828 | } | |
5829 | EXPORT_SYMBOL_GPL(rdev_get_dev); | |
5830 | ||
03c87b95 BG |
5831 | struct regmap *rdev_get_regmap(struct regulator_dev *rdev) |
5832 | { | |
5833 | return rdev->regmap; | |
5834 | } | |
5835 | EXPORT_SYMBOL_GPL(rdev_get_regmap); | |
5836 | ||
a5766f11 LG |
5837 | void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) |
5838 | { | |
5839 | return reg_init_data->driver_data; | |
5840 | } | |
5841 | EXPORT_SYMBOL_GPL(regulator_get_init_drvdata); | |
5842 | ||
ba55a974 | 5843 | #ifdef CONFIG_DEBUG_FS |
dbc55955 | 5844 | static int supply_map_show(struct seq_file *sf, void *data) |
ba55a974 | 5845 | { |
ba55a974 MB |
5846 | struct regulator_map *map; |
5847 | ||
ba55a974 | 5848 | list_for_each_entry(map, ®ulator_map_list, list) { |
dbc55955 HZ |
5849 | seq_printf(sf, "%s -> %s.%s\n", |
5850 | rdev_get_name(map->regulator), map->dev_name, | |
5851 | map->supply); | |
ba55a974 MB |
5852 | } |
5853 | ||
dbc55955 HZ |
5854 | return 0; |
5855 | } | |
3e60b4fc | 5856 | DEFINE_SHOW_ATTRIBUTE(supply_map); |
ba55a974 | 5857 | |
85f3b431 TV |
5858 | struct summary_data { |
5859 | struct seq_file *s; | |
5860 | struct regulator_dev *parent; | |
5861 | int level; | |
5862 | }; | |
5863 | ||
5864 | static void regulator_summary_show_subtree(struct seq_file *s, | |
5865 | struct regulator_dev *rdev, | |
5866 | int level); | |
5867 | ||
5868 | static int regulator_summary_show_children(struct device *dev, void *data) | |
5869 | { | |
5870 | struct regulator_dev *rdev = dev_to_rdev(dev); | |
5871 | struct summary_data *summary_data = data; | |
5872 | ||
5873 | if (rdev->supply && rdev->supply->rdev == summary_data->parent) | |
5874 | regulator_summary_show_subtree(summary_data->s, rdev, | |
5875 | summary_data->level + 1); | |
5876 | ||
5877 | return 0; | |
5878 | } | |
5879 | ||
7c225ec9 HS |
5880 | static void regulator_summary_show_subtree(struct seq_file *s, |
5881 | struct regulator_dev *rdev, | |
5882 | int level) | |
5883 | { | |
7c225ec9 HS |
5884 | struct regulation_constraints *c; |
5885 | struct regulator *consumer; | |
85f3b431 | 5886 | struct summary_data summary_data; |
7e4d9683 | 5887 | unsigned int opmode; |
7c225ec9 HS |
5888 | |
5889 | if (!rdev) | |
5890 | return; | |
5891 | ||
7e4d9683 | 5892 | opmode = _regulator_get_mode_unlocked(rdev); |
01de19d0 | 5893 | seq_printf(s, "%*s%-*s %3d %4d %6d %7s ", |
7c225ec9 HS |
5894 | level * 3 + 1, "", |
5895 | 30 - level * 3, rdev_get_name(rdev), | |
01de19d0 | 5896 | rdev->use_count, rdev->open_count, rdev->bypass_count, |
7e4d9683 | 5897 | regulator_opmode_to_str(opmode)); |
7c225ec9 | 5898 | |
d22b85a1 | 5899 | seq_printf(s, "%5dmV ", regulator_get_voltage_rdev(rdev) / 1000); |
7e4d9683 DA |
5900 | seq_printf(s, "%5dmA ", |
5901 | _regulator_get_current_limit_unlocked(rdev) / 1000); | |
7c225ec9 HS |
5902 | |
5903 | c = rdev->constraints; | |
5904 | if (c) { | |
5905 | switch (rdev->desc->type) { | |
5906 | case REGULATOR_VOLTAGE: | |
5907 | seq_printf(s, "%5dmV %5dmV ", | |
5908 | c->min_uV / 1000, c->max_uV / 1000); | |
5909 | break; | |
5910 | case REGULATOR_CURRENT: | |
5911 | seq_printf(s, "%5dmA %5dmA ", | |
5912 | c->min_uA / 1000, c->max_uA / 1000); | |
5913 | break; | |
5914 | } | |
5915 | } | |
5916 | ||
5917 | seq_puts(s, "\n"); | |
5918 | ||
5919 | list_for_each_entry(consumer, &rdev->consumer_list, list) { | |
e42a46b6 | 5920 | if (consumer->dev && consumer->dev->class == ®ulator_class) |
7c225ec9 HS |
5921 | continue; |
5922 | ||
5923 | seq_printf(s, "%*s%-*s ", | |
5924 | (level + 1) * 3 + 1, "", | |
e42a46b6 | 5925 | 30 - (level + 1) * 3, |
6b576eb0 | 5926 | consumer->supply_name ? consumer->supply_name : |
e42a46b6 | 5927 | consumer->dev ? dev_name(consumer->dev) : "deviceless"); |
7c225ec9 HS |
5928 | |
5929 | switch (rdev->desc->type) { | |
5930 | case REGULATOR_VOLTAGE: | |
5451781d DA |
5931 | seq_printf(s, "%3d %33dmA%c%5dmV %5dmV", |
5932 | consumer->enable_count, | |
7d3827b5 | 5933 | consumer->uA_load / 1000, |
5451781d DA |
5934 | consumer->uA_load && !consumer->enable_count ? |
5935 | '*' : ' ', | |
c360a6df CZ |
5936 | consumer->voltage[PM_SUSPEND_ON].min_uV / 1000, |
5937 | consumer->voltage[PM_SUSPEND_ON].max_uV / 1000); | |
7c225ec9 HS |
5938 | break; |
5939 | case REGULATOR_CURRENT: | |
7c225ec9 HS |
5940 | break; |
5941 | } | |
5942 | ||
5943 | seq_puts(s, "\n"); | |
5944 | } | |
5945 | ||
85f3b431 TV |
5946 | summary_data.s = s; |
5947 | summary_data.level = level; | |
5948 | summary_data.parent = rdev; | |
7c225ec9 | 5949 | |
85f3b431 TV |
5950 | class_for_each_device(®ulator_class, NULL, &summary_data, |
5951 | regulator_summary_show_children); | |
f8702f9e DO |
5952 | } |
5953 | ||
5954 | struct summary_lock_data { | |
5955 | struct ww_acquire_ctx *ww_ctx; | |
5956 | struct regulator_dev **new_contended_rdev; | |
5957 | struct regulator_dev **old_contended_rdev; | |
5958 | }; | |
5959 | ||
5960 | static int regulator_summary_lock_one(struct device *dev, void *data) | |
5961 | { | |
5962 | struct regulator_dev *rdev = dev_to_rdev(dev); | |
5963 | struct summary_lock_data *lock_data = data; | |
5964 | int ret = 0; | |
5965 | ||
5966 | if (rdev != *lock_data->old_contended_rdev) { | |
5967 | ret = regulator_lock_nested(rdev, lock_data->ww_ctx); | |
5968 | ||
5969 | if (ret == -EDEADLK) | |
5970 | *lock_data->new_contended_rdev = rdev; | |
5971 | else | |
5972 | WARN_ON_ONCE(ret); | |
5973 | } else { | |
5974 | *lock_data->old_contended_rdev = NULL; | |
5975 | } | |
5976 | ||
5977 | return ret; | |
5978 | } | |
5979 | ||
5980 | static int regulator_summary_unlock_one(struct device *dev, void *data) | |
5981 | { | |
5982 | struct regulator_dev *rdev = dev_to_rdev(dev); | |
5983 | struct summary_lock_data *lock_data = data; | |
5984 | ||
5985 | if (lock_data) { | |
5986 | if (rdev == *lock_data->new_contended_rdev) | |
5987 | return -EDEADLK; | |
5988 | } | |
7e4d9683 DA |
5989 | |
5990 | regulator_unlock(rdev); | |
f8702f9e DO |
5991 | |
5992 | return 0; | |
5993 | } | |
5994 | ||
5995 | static int regulator_summary_lock_all(struct ww_acquire_ctx *ww_ctx, | |
5996 | struct regulator_dev **new_contended_rdev, | |
5997 | struct regulator_dev **old_contended_rdev) | |
5998 | { | |
5999 | struct summary_lock_data lock_data; | |
6000 | int ret; | |
6001 | ||
6002 | lock_data.ww_ctx = ww_ctx; | |
6003 | lock_data.new_contended_rdev = new_contended_rdev; | |
6004 | lock_data.old_contended_rdev = old_contended_rdev; | |
6005 | ||
6006 | ret = class_for_each_device(®ulator_class, NULL, &lock_data, | |
6007 | regulator_summary_lock_one); | |
6008 | if (ret) | |
6009 | class_for_each_device(®ulator_class, NULL, &lock_data, | |
6010 | regulator_summary_unlock_one); | |
6011 | ||
6012 | return ret; | |
6013 | } | |
6014 | ||
6015 | static void regulator_summary_lock(struct ww_acquire_ctx *ww_ctx) | |
6016 | { | |
6017 | struct regulator_dev *new_contended_rdev = NULL; | |
6018 | struct regulator_dev *old_contended_rdev = NULL; | |
6019 | int err; | |
6020 | ||
ff9b34b6 DO |
6021 | mutex_lock(®ulator_list_mutex); |
6022 | ||
f8702f9e DO |
6023 | ww_acquire_init(ww_ctx, ®ulator_ww_class); |
6024 | ||
6025 | do { | |
6026 | if (new_contended_rdev) { | |
6027 | ww_mutex_lock_slow(&new_contended_rdev->mutex, ww_ctx); | |
6028 | old_contended_rdev = new_contended_rdev; | |
6029 | old_contended_rdev->ref_cnt++; | |
6030 | } | |
6031 | ||
6032 | err = regulator_summary_lock_all(ww_ctx, | |
6033 | &new_contended_rdev, | |
6034 | &old_contended_rdev); | |
6035 | ||
6036 | if (old_contended_rdev) | |
6037 | regulator_unlock(old_contended_rdev); | |
6038 | ||
6039 | } while (err == -EDEADLK); | |
6040 | ||
6041 | ww_acquire_done(ww_ctx); | |
6042 | } | |
6043 | ||
6044 | static void regulator_summary_unlock(struct ww_acquire_ctx *ww_ctx) | |
6045 | { | |
6046 | class_for_each_device(®ulator_class, NULL, NULL, | |
6047 | regulator_summary_unlock_one); | |
6048 | ww_acquire_fini(ww_ctx); | |
ff9b34b6 DO |
6049 | |
6050 | mutex_unlock(®ulator_list_mutex); | |
7c225ec9 HS |
6051 | } |
6052 | ||
85f3b431 | 6053 | static int regulator_summary_show_roots(struct device *dev, void *data) |
7c225ec9 | 6054 | { |
85f3b431 TV |
6055 | struct regulator_dev *rdev = dev_to_rdev(dev); |
6056 | struct seq_file *s = data; | |
7c225ec9 | 6057 | |
85f3b431 TV |
6058 | if (!rdev->supply) |
6059 | regulator_summary_show_subtree(s, rdev, 0); | |
7c225ec9 | 6060 | |
85f3b431 TV |
6061 | return 0; |
6062 | } | |
7c225ec9 | 6063 | |
85f3b431 TV |
6064 | static int regulator_summary_show(struct seq_file *s, void *data) |
6065 | { | |
f8702f9e DO |
6066 | struct ww_acquire_ctx ww_ctx; |
6067 | ||
01de19d0 DA |
6068 | seq_puts(s, " regulator use open bypass opmode voltage current min max\n"); |
6069 | seq_puts(s, "---------------------------------------------------------------------------------------\n"); | |
7c225ec9 | 6070 | |
f8702f9e DO |
6071 | regulator_summary_lock(&ww_ctx); |
6072 | ||
85f3b431 TV |
6073 | class_for_each_device(®ulator_class, NULL, s, |
6074 | regulator_summary_show_roots); | |
7c225ec9 | 6075 | |
f8702f9e DO |
6076 | regulator_summary_unlock(&ww_ctx); |
6077 | ||
7c225ec9 HS |
6078 | return 0; |
6079 | } | |
3e60b4fc YL |
6080 | DEFINE_SHOW_ATTRIBUTE(regulator_summary); |
6081 | #endif /* CONFIG_DEBUG_FS */ | |
7c225ec9 | 6082 | |
414c70cb LG |
6083 | static int __init regulator_init(void) |
6084 | { | |
34abbd68 MB |
6085 | int ret; |
6086 | ||
34abbd68 MB |
6087 | ret = class_register(®ulator_class); |
6088 | ||
1130e5b3 | 6089 | debugfs_root = debugfs_create_dir("regulator", NULL); |
24751434 | 6090 | if (!debugfs_root) |
1130e5b3 | 6091 | pr_warn("regulator: Failed to create debugfs directory\n"); |
ba55a974 | 6092 | |
3e60b4fc | 6093 | #ifdef CONFIG_DEBUG_FS |
f4d562c6 MB |
6094 | debugfs_create_file("supply_map", 0444, debugfs_root, NULL, |
6095 | &supply_map_fops); | |
1130e5b3 | 6096 | |
7c225ec9 | 6097 | debugfs_create_file("regulator_summary", 0444, debugfs_root, |
85f3b431 | 6098 | NULL, ®ulator_summary_fops); |
3e60b4fc | 6099 | #endif |
34abbd68 MB |
6100 | regulator_dummy_init(); |
6101 | ||
d8ca7d18 DO |
6102 | regulator_coupler_register(&generic_regulator_coupler); |
6103 | ||
34abbd68 | 6104 | return ret; |
414c70cb LG |
6105 | } |
6106 | ||
6107 | /* init early to allow our consumers to complete system booting */ | |
6108 | core_initcall(regulator_init); | |
ca725561 | 6109 | |
55576cf1 | 6110 | static int regulator_late_cleanup(struct device *dev, void *data) |
ca725561 | 6111 | { |
609ca5f3 | 6112 | struct regulator_dev *rdev = dev_to_rdev(dev); |
609ca5f3 | 6113 | struct regulation_constraints *c = rdev->constraints; |
4e2a354e | 6114 | int ret; |
ca725561 | 6115 | |
609ca5f3 MB |
6116 | if (c && c->always_on) |
6117 | return 0; | |
6118 | ||
8a34e979 | 6119 | if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS)) |
609ca5f3 MB |
6120 | return 0; |
6121 | ||
66cf9a7e | 6122 | regulator_lock(rdev); |
609ca5f3 MB |
6123 | |
6124 | if (rdev->use_count) | |
6125 | goto unlock; | |
6126 | ||
4e2a354e OB |
6127 | /* If reading the status failed, assume that it's off. */ |
6128 | if (_regulator_is_enabled(rdev) <= 0) | |
609ca5f3 MB |
6129 | goto unlock; |
6130 | ||
6131 | if (have_full_constraints()) { | |
6132 | /* We log since this may kill the system if it goes | |
69b8821e SK |
6133 | * wrong. |
6134 | */ | |
609ca5f3 MB |
6135 | rdev_info(rdev, "disabling\n"); |
6136 | ret = _regulator_do_disable(rdev); | |
6137 | if (ret != 0) | |
61aab5ad | 6138 | rdev_err(rdev, "couldn't disable: %pe\n", ERR_PTR(ret)); |
609ca5f3 MB |
6139 | } else { |
6140 | /* The intention is that in future we will | |
6141 | * assume that full constraints are provided | |
6142 | * so warn even if we aren't going to do | |
6143 | * anything here. | |
6144 | */ | |
6145 | rdev_warn(rdev, "incomplete constraints, leaving on\n"); | |
6146 | } | |
6147 | ||
6148 | unlock: | |
66cf9a7e | 6149 | regulator_unlock(rdev); |
609ca5f3 MB |
6150 | |
6151 | return 0; | |
6152 | } | |
6153 | ||
55576cf1 | 6154 | static void regulator_init_complete_work_function(struct work_struct *work) |
609ca5f3 | 6155 | { |
3827b64d JMC |
6156 | /* |
6157 | * Regulators may had failed to resolve their input supplies | |
6158 | * when were registered, either because the input supply was | |
6159 | * not registered yet or because its parent device was not | |
6160 | * bound yet. So attempt to resolve the input supplies for | |
6161 | * pending regulators before trying to disable unused ones. | |
6162 | */ | |
6163 | class_for_each_device(®ulator_class, NULL, NULL, | |
6164 | regulator_register_resolve_supply); | |
6165 | ||
ca725561 | 6166 | /* If we have a full configuration then disable any regulators |
e9535834 MB |
6167 | * we have permission to change the status for and which are |
6168 | * not in use or always_on. This is effectively the default | |
6169 | * for DT and ACPI as they have full constraints. | |
ca725561 | 6170 | */ |
609ca5f3 MB |
6171 | class_for_each_device(®ulator_class, NULL, NULL, |
6172 | regulator_late_cleanup); | |
55576cf1 MB |
6173 | } |
6174 | ||
6175 | static DECLARE_DELAYED_WORK(regulator_init_complete_work, | |
6176 | regulator_init_complete_work_function); | |
6177 | ||
6178 | static int __init regulator_init_complete(void) | |
6179 | { | |
6180 | /* | |
6181 | * Since DT doesn't provide an idiomatic mechanism for | |
6182 | * enabling full constraints and since it's much more natural | |
6183 | * with DT to provide them just assume that a DT enabled | |
6184 | * system has full constraints. | |
6185 | */ | |
6186 | if (of_have_populated_dt()) | |
6187 | has_full_constraints = true; | |
6188 | ||
6189 | /* | |
2a15483b JS |
6190 | * We punt completion for an arbitrary amount of time since |
6191 | * systems like distros will load many drivers from userspace | |
6192 | * so consumers might not always be ready yet, this is | |
6193 | * particularly an issue with laptops where this might bounce | |
6194 | * the display off then on. Ideally we'd get a notification | |
6195 | * from userspace when this happens but we don't so just wait | |
6196 | * a bit and hope we waited long enough. It'd be better if | |
6197 | * we'd only do this on systems that need it, and a kernel | |
6198 | * command line option might be useful. | |
55576cf1 | 6199 | */ |
2a15483b JS |
6200 | schedule_delayed_work(®ulator_init_complete_work, |
6201 | msecs_to_jiffies(30000)); | |
ca725561 MB |
6202 | |
6203 | return 0; | |
6204 | } | |
fd482a3e | 6205 | late_initcall_sync(regulator_init_complete); |