Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e1f60b29 NM |
2 | /* |
3 | * Generic OPP Interface | |
4 | * | |
5 | * Copyright (C) 2009-2010 Texas Instruments Incorporated. | |
6 | * Nishanth Menon | |
7 | * Romit Dasgupta | |
8 | * Kevin Hilman | |
e1f60b29 NM |
9 | */ |
10 | ||
d6d2a528 VK |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
d54974c2 | 13 | #include <linux/clk.h> |
e1f60b29 NM |
14 | #include <linux/errno.h> |
15 | #include <linux/err.h> | |
51990e82 | 16 | #include <linux/device.h> |
80126ce7 | 17 | #include <linux/export.h> |
009acd19 | 18 | #include <linux/pm_domain.h> |
9f8ea969 | 19 | #include <linux/regulator/consumer.h> |
11b9b663 VK |
20 | #include <linux/slab.h> |
21 | #include <linux/xarray.h> | |
e1f60b29 | 22 | |
f59d3ee8 | 23 | #include "opp.h" |
e1f60b29 NM |
24 | |
25 | /* | |
2c2709dc VK |
26 | * The root of the list of all opp-tables. All opp_table structures branch off |
27 | * from here, with each opp_table containing the list of opps it supports in | |
e1f60b29 NM |
28 | * various states of availability. |
29 | */ | |
f47b72a1 | 30 | LIST_HEAD(opp_tables); |
7eba0c76 | 31 | |
e1f60b29 | 32 | /* Lock to allow exclusive modification to the device and opp lists */ |
2c2709dc | 33 | DEFINE_MUTEX(opp_table_lock); |
27c09484 VK |
34 | /* Flag indicating that opp_tables list is being updated at the moment */ |
35 | static bool opp_tables_busy; | |
e1f60b29 | 36 | |
11b9b663 VK |
37 | /* OPP ID allocator */ |
38 | static DEFINE_XARRAY_ALLOC1(opp_configs); | |
39 | ||
9e62edac | 40 | static bool _find_opp_dev(const struct device *dev, struct opp_table *opp_table) |
06441658 | 41 | { |
2c2709dc | 42 | struct opp_device *opp_dev; |
9e62edac | 43 | bool found = false; |
06441658 | 44 | |
9e62edac | 45 | mutex_lock(&opp_table->lock); |
2c2709dc | 46 | list_for_each_entry(opp_dev, &opp_table->dev_list, node) |
9e62edac VK |
47 | if (opp_dev->dev == dev) { |
48 | found = true; | |
49 | break; | |
50 | } | |
06441658 | 51 | |
9e62edac VK |
52 | mutex_unlock(&opp_table->lock); |
53 | return found; | |
06441658 VK |
54 | } |
55 | ||
6ac42397 | 56 | static struct opp_table *_find_opp_table_unlocked(struct device *dev) |
5b650b38 VK |
57 | { |
58 | struct opp_table *opp_table; | |
59 | ||
60 | list_for_each_entry(opp_table, &opp_tables, node) { | |
9e62edac | 61 | if (_find_opp_dev(dev, opp_table)) { |
5b650b38 | 62 | _get_opp_table_kref(opp_table); |
5b650b38 VK |
63 | return opp_table; |
64 | } | |
65 | } | |
66 | ||
67 | return ERR_PTR(-ENODEV); | |
68 | } | |
69 | ||
e1f60b29 | 70 | /** |
2c2709dc VK |
71 | * _find_opp_table() - find opp_table struct using device pointer |
72 | * @dev: device pointer used to lookup OPP table | |
e1f60b29 | 73 | * |
052c6f19 | 74 | * Search OPP table for one containing matching device. |
e1f60b29 | 75 | * |
2c2709dc | 76 | * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or |
e1f60b29 NM |
77 | * -EINVAL based on type of error. |
78 | * | |
5b650b38 | 79 | * The callers must call dev_pm_opp_put_opp_table() after the table is used. |
e1f60b29 | 80 | */ |
2c2709dc | 81 | struct opp_table *_find_opp_table(struct device *dev) |
e1f60b29 | 82 | { |
2c2709dc | 83 | struct opp_table *opp_table; |
e1f60b29 | 84 | |
50a3cb04 | 85 | if (IS_ERR_OR_NULL(dev)) { |
e1f60b29 NM |
86 | pr_err("%s: Invalid parameters\n", __func__); |
87 | return ERR_PTR(-EINVAL); | |
88 | } | |
89 | ||
5b650b38 VK |
90 | mutex_lock(&opp_table_lock); |
91 | opp_table = _find_opp_table_unlocked(dev); | |
92 | mutex_unlock(&opp_table_lock); | |
e1f60b29 | 93 | |
5b650b38 | 94 | return opp_table; |
e1f60b29 NM |
95 | } |
96 | ||
f123ea74 VK |
97 | /* |
98 | * Returns true if multiple clocks aren't there, else returns false with WARN. | |
99 | * | |
100 | * We don't force clk_count == 1 here as there are users who don't have a clock | |
101 | * representation in the OPP table and manage the clock configuration themselves | |
102 | * in an platform specific way. | |
103 | */ | |
104 | static bool assert_single_clk(struct opp_table *opp_table) | |
105 | { | |
106 | return !WARN_ON(opp_table->clk_count > 1); | |
107 | } | |
108 | ||
e1f60b29 | 109 | /** |
d6d00742 | 110 | * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp |
e1f60b29 NM |
111 | * @opp: opp for which voltage has to be returned for |
112 | * | |
984f16c8 | 113 | * Return: voltage in micro volt corresponding to the opp, else |
e1f60b29 NM |
114 | * return 0 |
115 | * | |
dfbe4678 | 116 | * This is useful only for devices with single power supply. |
e1f60b29 | 117 | */ |
47d43ba7 | 118 | unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) |
e1f60b29 | 119 | { |
052c6f19 | 120 | if (IS_ERR_OR_NULL(opp)) { |
e1f60b29 | 121 | pr_err("%s: Invalid parameters\n", __func__); |
052c6f19 VK |
122 | return 0; |
123 | } | |
e1f60b29 | 124 | |
052c6f19 | 125 | return opp->supplies[0].u_volt; |
e1f60b29 | 126 | } |
5d4879cd | 127 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); |
e1f60b29 | 128 | |
69b1af17 VK |
129 | /** |
130 | * dev_pm_opp_get_supplies() - Gets the supply information corresponding to an opp | |
131 | * @opp: opp for which voltage has to be returned for | |
132 | * @supplies: Placeholder for copying the supply information. | |
133 | * | |
134 | * Return: negative error number on failure, 0 otherwise on success after | |
135 | * setting @supplies. | |
136 | * | |
137 | * This can be used for devices with any number of power supplies. The caller | |
138 | * must ensure the @supplies array must contain space for each regulator. | |
139 | */ | |
140 | int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, | |
141 | struct dev_pm_opp_supply *supplies) | |
142 | { | |
143 | if (IS_ERR_OR_NULL(opp) || !supplies) { | |
144 | pr_err("%s: Invalid parameters\n", __func__); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | memcpy(supplies, opp->supplies, | |
149 | sizeof(*supplies) * opp->opp_table->regulator_count); | |
150 | return 0; | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_supplies); | |
153 | ||
4f9a7a1d LL |
154 | /** |
155 | * dev_pm_opp_get_power() - Gets the power corresponding to an opp | |
156 | * @opp: opp for which power has to be returned for | |
157 | * | |
158 | * Return: power in micro watt corresponding to the opp, else | |
159 | * return 0 | |
160 | * | |
161 | * This is useful only for devices with single power supply. | |
162 | */ | |
163 | unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp) | |
164 | { | |
165 | unsigned long opp_power = 0; | |
166 | int i; | |
167 | ||
168 | if (IS_ERR_OR_NULL(opp)) { | |
169 | pr_err("%s: Invalid parameters\n", __func__); | |
170 | return 0; | |
171 | } | |
172 | for (i = 0; i < opp->opp_table->regulator_count; i++) | |
173 | opp_power += opp->supplies[i].u_watt; | |
174 | ||
175 | return opp_power; | |
176 | } | |
177 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_power); | |
178 | ||
5f756d03 MS |
179 | /** |
180 | * dev_pm_opp_get_freq_indexed() - Gets the frequency corresponding to an | |
181 | * available opp with specified index | |
182 | * @opp: opp for which frequency has to be returned for | |
183 | * @index: index of the frequency within the required opp | |
184 | * | |
185 | * Return: frequency in hertz corresponding to the opp with specified index, | |
186 | * else return 0 | |
187 | */ | |
188 | unsigned long dev_pm_opp_get_freq_indexed(struct dev_pm_opp *opp, u32 index) | |
189 | { | |
190 | if (IS_ERR_OR_NULL(opp) || index >= opp->opp_table->clk_count) { | |
191 | pr_err("%s: Invalid parameters\n", __func__); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | return opp->rates[index]; | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq_indexed); | |
198 | ||
5b93ac54 RN |
199 | /** |
200 | * dev_pm_opp_get_level() - Gets the level corresponding to an available opp | |
201 | * @opp: opp for which level value has to be returned for | |
202 | * | |
203 | * Return: level read from device tree corresponding to the opp, else | |
073d3d2c | 204 | * return U32_MAX. |
5b93ac54 RN |
205 | */ |
206 | unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp) | |
207 | { | |
208 | if (IS_ERR_OR_NULL(opp) || !opp->available) { | |
209 | pr_err("%s: Invalid parameters\n", __func__); | |
210 | return 0; | |
211 | } | |
212 | ||
213 | return opp->level; | |
214 | } | |
215 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_level); | |
216 | ||
597ff543 DO |
217 | /** |
218 | * dev_pm_opp_get_required_pstate() - Gets the required performance state | |
219 | * corresponding to an available opp | |
220 | * @opp: opp for which performance state has to be returned for | |
221 | * @index: index of the required opp | |
222 | * | |
223 | * Return: performance state read from device tree corresponding to the | |
073d3d2c | 224 | * required opp, else return U32_MAX. |
597ff543 DO |
225 | */ |
226 | unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp, | |
227 | unsigned int index) | |
228 | { | |
229 | if (IS_ERR_OR_NULL(opp) || !opp->available || | |
7ddd8deb | 230 | index >= opp->opp_table->required_opp_count) { |
597ff543 DO |
231 | pr_err("%s: Invalid parameters\n", __func__); |
232 | return 0; | |
233 | } | |
234 | ||
7eba0c76 | 235 | /* required-opps not fully initialized yet */ |
7ddd8deb | 236 | if (lazy_linking_pending(opp->opp_table)) |
7eba0c76 VK |
237 | return 0; |
238 | ||
84cb7ff3 | 239 | /* The required OPP table must belong to a genpd */ |
7ddd8deb | 240 | if (unlikely(!opp->opp_table->required_opp_tables[index]->is_genpd)) { |
84cb7ff3 VK |
241 | pr_err("%s: Performance state is only valid for genpds.\n", __func__); |
242 | return 0; | |
243 | } | |
244 | ||
7c41cdcd | 245 | return opp->required_opps[index]->level; |
597ff543 DO |
246 | } |
247 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate); | |
248 | ||
19445b25 BZ |
249 | /** |
250 | * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not | |
251 | * @opp: opp for which turbo mode is being verified | |
252 | * | |
253 | * Turbo OPPs are not for normal use, and can be enabled (under certain | |
254 | * conditions) for short duration of times to finish high throughput work | |
255 | * quickly. Running on them for longer times may overheat the chip. | |
256 | * | |
257 | * Return: true if opp is turbo opp, else false. | |
19445b25 BZ |
258 | */ |
259 | bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) | |
260 | { | |
052c6f19 | 261 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
19445b25 BZ |
262 | pr_err("%s: Invalid parameters\n", __func__); |
263 | return false; | |
264 | } | |
265 | ||
052c6f19 | 266 | return opp->turbo; |
19445b25 BZ |
267 | } |
268 | EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); | |
269 | ||
3ca9bb33 VK |
270 | /** |
271 | * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds | |
272 | * @dev: device for which we do this operation | |
273 | * | |
274 | * Return: This function returns the max clock latency in nanoseconds. | |
3ca9bb33 VK |
275 | */ |
276 | unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) | |
277 | { | |
2c2709dc | 278 | struct opp_table *opp_table; |
3ca9bb33 VK |
279 | unsigned long clock_latency_ns; |
280 | ||
2c2709dc VK |
281 | opp_table = _find_opp_table(dev); |
282 | if (IS_ERR(opp_table)) | |
5b650b38 VK |
283 | return 0; |
284 | ||
285 | clock_latency_ns = opp_table->clock_latency_ns_max; | |
286 | ||
287 | dev_pm_opp_put_opp_table(opp_table); | |
3ca9bb33 | 288 | |
3ca9bb33 VK |
289 | return clock_latency_ns; |
290 | } | |
291 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); | |
292 | ||
655c9df9 VK |
293 | /** |
294 | * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds | |
295 | * @dev: device for which we do this operation | |
296 | * | |
297 | * Return: This function returns the max voltage latency in nanoseconds. | |
655c9df9 VK |
298 | */ |
299 | unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) | |
300 | { | |
2c2709dc | 301 | struct opp_table *opp_table; |
655c9df9 | 302 | struct dev_pm_opp *opp; |
478256bd | 303 | struct regulator *reg; |
655c9df9 | 304 | unsigned long latency_ns = 0; |
dfbe4678 VK |
305 | int ret, i, count; |
306 | struct { | |
307 | unsigned long min; | |
308 | unsigned long max; | |
309 | } *uV; | |
310 | ||
cdd3e614 VK |
311 | opp_table = _find_opp_table(dev); |
312 | if (IS_ERR(opp_table)) | |
313 | return 0; | |
314 | ||
dfbe4678 | 315 | /* Regulator may not be required for the device */ |
90e3577b | 316 | if (!opp_table->regulators) |
cdd3e614 | 317 | goto put_opp_table; |
dfbe4678 | 318 | |
90e3577b VK |
319 | count = opp_table->regulator_count; |
320 | ||
dfbe4678 VK |
321 | uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL); |
322 | if (!uV) | |
478256bd | 323 | goto put_opp_table; |
655c9df9 | 324 | |
052c6f19 VK |
325 | mutex_lock(&opp_table->lock); |
326 | ||
dfbe4678 VK |
327 | for (i = 0; i < count; i++) { |
328 | uV[i].min = ~0; | |
329 | uV[i].max = 0; | |
655c9df9 | 330 | |
052c6f19 | 331 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
dfbe4678 VK |
332 | if (!opp->available) |
333 | continue; | |
334 | ||
335 | if (opp->supplies[i].u_volt_min < uV[i].min) | |
336 | uV[i].min = opp->supplies[i].u_volt_min; | |
337 | if (opp->supplies[i].u_volt_max > uV[i].max) | |
338 | uV[i].max = opp->supplies[i].u_volt_max; | |
339 | } | |
655c9df9 VK |
340 | } |
341 | ||
052c6f19 | 342 | mutex_unlock(&opp_table->lock); |
655c9df9 VK |
343 | |
344 | /* | |
2c2709dc | 345 | * The caller needs to ensure that opp_table (and hence the regulator) |
655c9df9 VK |
346 | * isn't freed, while we are executing this routine. |
347 | */ | |
8cc31116 | 348 | for (i = 0; i < count; i++) { |
478256bd | 349 | reg = opp_table->regulators[i]; |
dfbe4678 VK |
350 | ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max); |
351 | if (ret > 0) | |
352 | latency_ns += ret * 1000; | |
353 | } | |
354 | ||
dfbe4678 | 355 | kfree(uV); |
cdd3e614 VK |
356 | put_opp_table: |
357 | dev_pm_opp_put_opp_table(opp_table); | |
655c9df9 VK |
358 | |
359 | return latency_ns; | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency); | |
362 | ||
21743447 VK |
363 | /** |
364 | * dev_pm_opp_get_max_transition_latency() - Get max transition latency in | |
365 | * nanoseconds | |
366 | * @dev: device for which we do this operation | |
367 | * | |
368 | * Return: This function returns the max transition latency, in nanoseconds, to | |
369 | * switch from one OPP to other. | |
21743447 VK |
370 | */ |
371 | unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) | |
372 | { | |
373 | return dev_pm_opp_get_max_volt_latency(dev) + | |
374 | dev_pm_opp_get_max_clock_latency(dev); | |
375 | } | |
376 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency); | |
377 | ||
4eafbd15 | 378 | /** |
3aa26a3b | 379 | * dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz |
4eafbd15 BZ |
380 | * @dev: device for which we do this operation |
381 | * | |
3aa26a3b VK |
382 | * Return: This function returns the frequency of the OPP marked as suspend_opp |
383 | * if one is available, else returns 0; | |
4eafbd15 | 384 | */ |
3aa26a3b | 385 | unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) |
4eafbd15 | 386 | { |
2c2709dc | 387 | struct opp_table *opp_table; |
3aa26a3b | 388 | unsigned long freq = 0; |
4eafbd15 | 389 | |
2c2709dc | 390 | opp_table = _find_opp_table(dev); |
5b650b38 VK |
391 | if (IS_ERR(opp_table)) |
392 | return 0; | |
3aa26a3b | 393 | |
5b650b38 VK |
394 | if (opp_table->suspend_opp && opp_table->suspend_opp->available) |
395 | freq = dev_pm_opp_get_freq(opp_table->suspend_opp); | |
396 | ||
397 | dev_pm_opp_put_opp_table(opp_table); | |
4eafbd15 | 398 | |
3aa26a3b | 399 | return freq; |
4eafbd15 | 400 | } |
3aa26a3b | 401 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq); |
4eafbd15 | 402 | |
a1e8c136 VK |
403 | int _get_opp_count(struct opp_table *opp_table) |
404 | { | |
405 | struct dev_pm_opp *opp; | |
406 | int count = 0; | |
407 | ||
408 | mutex_lock(&opp_table->lock); | |
409 | ||
410 | list_for_each_entry(opp, &opp_table->opp_list, node) { | |
411 | if (opp->available) | |
412 | count++; | |
413 | } | |
414 | ||
415 | mutex_unlock(&opp_table->lock); | |
416 | ||
417 | return count; | |
418 | } | |
419 | ||
e1f60b29 | 420 | /** |
2c2709dc | 421 | * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table |
e1f60b29 NM |
422 | * @dev: device for which we do this operation |
423 | * | |
984f16c8 | 424 | * Return: This function returns the number of available opps if there are any, |
e1f60b29 | 425 | * else returns 0 if none or the corresponding error value. |
e1f60b29 | 426 | */ |
5d4879cd | 427 | int dev_pm_opp_get_opp_count(struct device *dev) |
e1f60b29 | 428 | { |
2c2709dc | 429 | struct opp_table *opp_table; |
a1e8c136 | 430 | int count; |
e1f60b29 | 431 | |
2c2709dc VK |
432 | opp_table = _find_opp_table(dev); |
433 | if (IS_ERR(opp_table)) { | |
434 | count = PTR_ERR(opp_table); | |
035ed072 | 435 | dev_dbg(dev, "%s: OPP table not found (%d)\n", |
b4718c02 | 436 | __func__, count); |
09f662f9 | 437 | return count; |
e1f60b29 NM |
438 | } |
439 | ||
a1e8c136 | 440 | count = _get_opp_count(opp_table); |
5b650b38 VK |
441 | dev_pm_opp_put_opp_table(opp_table); |
442 | ||
e1f60b29 NM |
443 | return count; |
444 | } | |
5d4879cd | 445 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count); |
e1f60b29 | 446 | |
aab8ced2 VK |
447 | /* Helpers to read keys */ |
448 | static unsigned long _read_freq(struct dev_pm_opp *opp, int index) | |
449 | { | |
034d6aac | 450 | return opp->rates[index]; |
aab8ced2 VK |
451 | } |
452 | ||
c2ab2cb6 VK |
453 | static unsigned long _read_level(struct dev_pm_opp *opp, int index) |
454 | { | |
455 | return opp->level; | |
456 | } | |
457 | ||
add1dc09 VK |
458 | static unsigned long _read_bw(struct dev_pm_opp *opp, int index) |
459 | { | |
460 | return opp->bandwidth[index].peak; | |
461 | } | |
462 | ||
aab8ced2 VK |
463 | /* Generic comparison helpers */ |
464 | static bool _compare_exact(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, | |
465 | unsigned long opp_key, unsigned long key) | |
466 | { | |
467 | if (opp_key == key) { | |
468 | *opp = temp_opp; | |
469 | return true; | |
470 | } | |
471 | ||
472 | return false; | |
473 | } | |
474 | ||
475 | static bool _compare_ceil(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, | |
476 | unsigned long opp_key, unsigned long key) | |
477 | { | |
478 | if (opp_key >= key) { | |
479 | *opp = temp_opp; | |
480 | return true; | |
481 | } | |
482 | ||
483 | return false; | |
484 | } | |
485 | ||
486 | static bool _compare_floor(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, | |
487 | unsigned long opp_key, unsigned long key) | |
488 | { | |
489 | if (opp_key > key) | |
490 | return true; | |
491 | ||
492 | *opp = temp_opp; | |
493 | return false; | |
494 | } | |
495 | ||
496 | /* Generic key finding helpers */ | |
497 | static struct dev_pm_opp *_opp_table_find_key(struct opp_table *opp_table, | |
498 | unsigned long *key, int index, bool available, | |
499 | unsigned long (*read)(struct dev_pm_opp *opp, int index), | |
500 | bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, | |
e10a4644 VK |
501 | unsigned long opp_key, unsigned long key), |
502 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 VK |
503 | { |
504 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); | |
505 | ||
e10a4644 VK |
506 | /* Assert that the requirement is met */ |
507 | if (assert && !assert(opp_table)) | |
508 | return ERR_PTR(-EINVAL); | |
509 | ||
aab8ced2 VK |
510 | mutex_lock(&opp_table->lock); |
511 | ||
512 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { | |
513 | if (temp_opp->available == available) { | |
514 | if (compare(&opp, temp_opp, read(temp_opp, index), *key)) | |
515 | break; | |
516 | } | |
517 | } | |
518 | ||
519 | /* Increment the reference count of OPP */ | |
520 | if (!IS_ERR(opp)) { | |
521 | *key = read(opp, index); | |
522 | dev_pm_opp_get(opp); | |
523 | } | |
524 | ||
525 | mutex_unlock(&opp_table->lock); | |
526 | ||
527 | return opp; | |
528 | } | |
529 | ||
530 | static struct dev_pm_opp * | |
531 | _find_key(struct device *dev, unsigned long *key, int index, bool available, | |
532 | unsigned long (*read)(struct dev_pm_opp *opp, int index), | |
533 | bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, | |
e10a4644 VK |
534 | unsigned long opp_key, unsigned long key), |
535 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 VK |
536 | { |
537 | struct opp_table *opp_table; | |
538 | struct dev_pm_opp *opp; | |
539 | ||
540 | opp_table = _find_opp_table(dev); | |
541 | if (IS_ERR(opp_table)) { | |
542 | dev_err(dev, "%s: OPP table not found (%ld)\n", __func__, | |
543 | PTR_ERR(opp_table)); | |
544 | return ERR_CAST(opp_table); | |
545 | } | |
546 | ||
547 | opp = _opp_table_find_key(opp_table, key, index, available, read, | |
e10a4644 | 548 | compare, assert); |
aab8ced2 VK |
549 | |
550 | dev_pm_opp_put_opp_table(opp_table); | |
551 | ||
552 | return opp; | |
553 | } | |
554 | ||
555 | static struct dev_pm_opp *_find_key_exact(struct device *dev, | |
556 | unsigned long key, int index, bool available, | |
e10a4644 VK |
557 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
558 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 VK |
559 | { |
560 | /* | |
561 | * The value of key will be updated here, but will be ignored as the | |
562 | * caller doesn't need it. | |
563 | */ | |
e10a4644 VK |
564 | return _find_key(dev, &key, index, available, read, _compare_exact, |
565 | assert); | |
aab8ced2 VK |
566 | } |
567 | ||
568 | static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table, | |
569 | unsigned long *key, int index, bool available, | |
e10a4644 VK |
570 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
571 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 VK |
572 | { |
573 | return _opp_table_find_key(opp_table, key, index, available, read, | |
e10a4644 | 574 | _compare_ceil, assert); |
aab8ced2 VK |
575 | } |
576 | ||
577 | static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key, | |
578 | int index, bool available, | |
e10a4644 VK |
579 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
580 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 | 581 | { |
e10a4644 VK |
582 | return _find_key(dev, key, index, available, read, _compare_ceil, |
583 | assert); | |
aab8ced2 VK |
584 | } |
585 | ||
586 | static struct dev_pm_opp *_find_key_floor(struct device *dev, | |
587 | unsigned long *key, int index, bool available, | |
e10a4644 VK |
588 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
589 | bool (*assert)(struct opp_table *opp_table)) | |
aab8ced2 | 590 | { |
e10a4644 VK |
591 | return _find_key(dev, key, index, available, read, _compare_floor, |
592 | assert); | |
aab8ced2 VK |
593 | } |
594 | ||
e1f60b29 | 595 | /** |
5d4879cd | 596 | * dev_pm_opp_find_freq_exact() - search for an exact frequency |
e1f60b29 NM |
597 | * @dev: device for which we do this operation |
598 | * @freq: frequency to search for | |
7ae49618 | 599 | * @available: true/false - match for available opp |
e1f60b29 | 600 | * |
2c2709dc | 601 | * Return: Searches for exact match in the opp table and returns pointer to the |
984f16c8 NM |
602 | * matching opp if found, else returns ERR_PTR in case of error and should |
603 | * be handled using IS_ERR. Error return values can be: | |
0779726c NM |
604 | * EINVAL: for bad pointer |
605 | * ERANGE: no match found for search | |
606 | * ENODEV: if device not found in list of registered devices | |
e1f60b29 NM |
607 | * |
608 | * Note: available is a modifier for the search. if available=true, then the | |
609 | * match is for exact matching frequency and is available in the stored OPP | |
610 | * table. if false, the match is for exact frequency which is not available. | |
611 | * | |
612 | * This provides a mechanism to enable an opp which is not available currently | |
613 | * or the opposite as well. | |
614 | * | |
8a31d9d9 VK |
615 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
616 | * use. | |
e1f60b29 | 617 | */ |
47d43ba7 | 618 | struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, |
aab8ced2 | 619 | unsigned long freq, bool available) |
e1f60b29 | 620 | { |
f123ea74 VK |
621 | return _find_key_exact(dev, freq, 0, available, _read_freq, |
622 | assert_single_clk); | |
e1f60b29 | 623 | } |
5d4879cd | 624 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); |
e1f60b29 | 625 | |
a5893928 VK |
626 | /** |
627 | * dev_pm_opp_find_freq_exact_indexed() - Search for an exact freq for the | |
628 | * clock corresponding to the index | |
629 | * @dev: Device for which we do this operation | |
630 | * @freq: frequency to search for | |
631 | * @index: Clock index | |
632 | * @available: true/false - match for available opp | |
633 | * | |
634 | * Search for the matching exact OPP for the clock corresponding to the | |
635 | * specified index from a starting freq for a device. | |
636 | * | |
637 | * Return: matching *opp , else returns ERR_PTR in case of error and should be | |
638 | * handled using IS_ERR. Error return values can be: | |
639 | * EINVAL: for bad pointer | |
640 | * ERANGE: no match found for search | |
641 | * ENODEV: if device not found in list of registered devices | |
642 | * | |
643 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
644 | * use. | |
645 | */ | |
646 | struct dev_pm_opp * | |
647 | dev_pm_opp_find_freq_exact_indexed(struct device *dev, unsigned long freq, | |
648 | u32 index, bool available) | |
649 | { | |
650 | return _find_key_exact(dev, freq, index, available, _read_freq, NULL); | |
651 | } | |
652 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact_indexed); | |
653 | ||
067b7ce0 JZ |
654 | static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, |
655 | unsigned long *freq) | |
656 | { | |
e10a4644 | 657 | return _opp_table_find_key_ceil(opp_table, freq, 0, true, _read_freq, |
f123ea74 | 658 | assert_single_clk); |
067b7ce0 JZ |
659 | } |
660 | ||
e1f60b29 | 661 | /** |
5d4879cd | 662 | * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq |
e1f60b29 NM |
663 | * @dev: device for which we do this operation |
664 | * @freq: Start frequency | |
665 | * | |
666 | * Search for the matching ceil *available* OPP from a starting freq | |
667 | * for a device. | |
668 | * | |
984f16c8 | 669 | * Return: matching *opp and refreshes *freq accordingly, else returns |
0779726c NM |
670 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
671 | * values can be: | |
672 | * EINVAL: for bad pointer | |
673 | * ERANGE: no match found for search | |
674 | * ENODEV: if device not found in list of registered devices | |
e1f60b29 | 675 | * |
8a31d9d9 VK |
676 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
677 | * use. | |
e1f60b29 | 678 | */ |
47d43ba7 NM |
679 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, |
680 | unsigned long *freq) | |
e1f60b29 | 681 | { |
f123ea74 | 682 | return _find_key_ceil(dev, freq, 0, true, _read_freq, assert_single_clk); |
e1f60b29 | 683 | } |
5d4879cd | 684 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); |
e1f60b29 | 685 | |
142e17c1 MS |
686 | /** |
687 | * dev_pm_opp_find_freq_ceil_indexed() - Search for a rounded ceil freq for the | |
688 | * clock corresponding to the index | |
689 | * @dev: Device for which we do this operation | |
690 | * @freq: Start frequency | |
691 | * @index: Clock index | |
692 | * | |
693 | * Search for the matching ceil *available* OPP for the clock corresponding to | |
694 | * the specified index from a starting freq for a device. | |
695 | * | |
696 | * Return: matching *opp and refreshes *freq accordingly, else returns | |
697 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return | |
698 | * values can be: | |
699 | * EINVAL: for bad pointer | |
700 | * ERANGE: no match found for search | |
701 | * ENODEV: if device not found in list of registered devices | |
702 | * | |
703 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
704 | * use. | |
705 | */ | |
706 | struct dev_pm_opp * | |
707 | dev_pm_opp_find_freq_ceil_indexed(struct device *dev, unsigned long *freq, | |
708 | u32 index) | |
709 | { | |
710 | return _find_key_ceil(dev, freq, index, true, _read_freq, NULL); | |
711 | } | |
712 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_indexed); | |
713 | ||
e1f60b29 | 714 | /** |
5d4879cd | 715 | * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq |
e1f60b29 NM |
716 | * @dev: device for which we do this operation |
717 | * @freq: Start frequency | |
718 | * | |
719 | * Search for the matching floor *available* OPP from a starting freq | |
720 | * for a device. | |
721 | * | |
984f16c8 | 722 | * Return: matching *opp and refreshes *freq accordingly, else returns |
0779726c NM |
723 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
724 | * values can be: | |
725 | * EINVAL: for bad pointer | |
726 | * ERANGE: no match found for search | |
727 | * ENODEV: if device not found in list of registered devices | |
e1f60b29 | 728 | * |
8a31d9d9 VK |
729 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
730 | * use. | |
e1f60b29 | 731 | */ |
47d43ba7 NM |
732 | struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, |
733 | unsigned long *freq) | |
e1f60b29 | 734 | { |
f123ea74 | 735 | return _find_key_floor(dev, freq, 0, true, _read_freq, assert_single_clk); |
e1f60b29 | 736 | } |
5d4879cd | 737 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); |
e1f60b29 | 738 | |
142e17c1 MS |
739 | /** |
740 | * dev_pm_opp_find_freq_floor_indexed() - Search for a rounded floor freq for the | |
741 | * clock corresponding to the index | |
742 | * @dev: Device for which we do this operation | |
743 | * @freq: Start frequency | |
744 | * @index: Clock index | |
745 | * | |
746 | * Search for the matching floor *available* OPP for the clock corresponding to | |
747 | * the specified index from a starting freq for a device. | |
748 | * | |
749 | * Return: matching *opp and refreshes *freq accordingly, else returns | |
750 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return | |
751 | * values can be: | |
752 | * EINVAL: for bad pointer | |
753 | * ERANGE: no match found for search | |
754 | * ENODEV: if device not found in list of registered devices | |
755 | * | |
756 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
757 | * use. | |
758 | */ | |
759 | struct dev_pm_opp * | |
760 | dev_pm_opp_find_freq_floor_indexed(struct device *dev, unsigned long *freq, | |
761 | u32 index) | |
762 | { | |
763 | return _find_key_floor(dev, freq, index, true, _read_freq, NULL); | |
764 | } | |
765 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor_indexed); | |
766 | ||
22079af7 VK |
767 | /** |
768 | * dev_pm_opp_find_level_exact() - search for an exact level | |
769 | * @dev: device for which we do this operation | |
770 | * @level: level to search for | |
771 | * | |
772 | * Return: Searches for exact match in the opp table and returns pointer to the | |
773 | * matching opp if found, else returns ERR_PTR in case of error and should | |
774 | * be handled using IS_ERR. Error return values can be: | |
775 | * EINVAL: for bad pointer | |
776 | * ERANGE: no match found for search | |
777 | * ENODEV: if device not found in list of registered devices | |
778 | * | |
779 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
780 | * use. | |
781 | */ | |
782 | struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev, | |
783 | unsigned int level) | |
784 | { | |
e10a4644 | 785 | return _find_key_exact(dev, level, 0, true, _read_level, NULL); |
22079af7 VK |
786 | } |
787 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact); | |
788 | ||
789 | /** | |
790 | * dev_pm_opp_find_level_ceil() - search for an rounded up level | |
791 | * @dev: device for which we do this operation | |
792 | * @level: level to search for | |
793 | * | |
794 | * Return: Searches for rounded up match in the opp table and returns pointer | |
795 | * to the matching opp if found, else returns ERR_PTR in case of error and | |
796 | * should be handled using IS_ERR. Error return values can be: | |
797 | * EINVAL: for bad pointer | |
798 | * ERANGE: no match found for search | |
799 | * ENODEV: if device not found in list of registered devices | |
800 | * | |
801 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
802 | * use. | |
803 | */ | |
804 | struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, | |
805 | unsigned int *level) | |
806 | { | |
c2ab2cb6 VK |
807 | unsigned long temp = *level; |
808 | struct dev_pm_opp *opp; | |
22079af7 | 809 | |
e10a4644 | 810 | opp = _find_key_ceil(dev, &temp, 0, true, _read_level, NULL); |
19cc8b18 VK |
811 | if (IS_ERR(opp)) |
812 | return opp; | |
073d3d2c VK |
813 | |
814 | /* False match */ | |
815 | if (temp == OPP_LEVEL_UNSET) { | |
816 | dev_err(dev, "%s: OPP levels aren't available\n", __func__); | |
817 | dev_pm_opp_put(opp); | |
818 | return ERR_PTR(-ENODEV); | |
819 | } | |
820 | ||
c2ab2cb6 | 821 | *level = temp; |
22079af7 VK |
822 | return opp; |
823 | } | |
824 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil); | |
825 | ||
a0242c81 K |
826 | /** |
827 | * dev_pm_opp_find_level_floor() - Search for a rounded floor level | |
828 | * @dev: device for which we do this operation | |
829 | * @level: Start level | |
830 | * | |
831 | * Search for the matching floor *available* OPP from a starting level | |
832 | * for a device. | |
833 | * | |
834 | * Return: matching *opp and refreshes *level accordingly, else returns | |
835 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return | |
836 | * values can be: | |
837 | * EINVAL: for bad pointer | |
838 | * ERANGE: no match found for search | |
839 | * ENODEV: if device not found in list of registered devices | |
840 | * | |
841 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
842 | * use. | |
843 | */ | |
844 | struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev, | |
ba367479 | 845 | unsigned int *level) |
a0242c81 | 846 | { |
ba367479 VK |
847 | unsigned long temp = *level; |
848 | struct dev_pm_opp *opp; | |
849 | ||
850 | opp = _find_key_floor(dev, &temp, 0, true, _read_level, NULL); | |
851 | *level = temp; | |
852 | return opp; | |
a0242c81 K |
853 | } |
854 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor); | |
855 | ||
00ce3873 KK |
856 | /** |
857 | * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth | |
858 | * @dev: device for which we do this operation | |
617df304 | 859 | * @bw: start bandwidth |
00ce3873 KK |
860 | * @index: which bandwidth to compare, in case of OPPs with several values |
861 | * | |
862 | * Search for the matching floor *available* OPP from a starting bandwidth | |
863 | * for a device. | |
864 | * | |
865 | * Return: matching *opp and refreshes *bw accordingly, else returns | |
866 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return | |
867 | * values can be: | |
868 | * EINVAL: for bad pointer | |
869 | * ERANGE: no match found for search | |
870 | * ENODEV: if device not found in list of registered devices | |
871 | * | |
872 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
873 | * use. | |
874 | */ | |
add1dc09 VK |
875 | struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw, |
876 | int index) | |
00ce3873 | 877 | { |
add1dc09 VK |
878 | unsigned long temp = *bw; |
879 | struct dev_pm_opp *opp; | |
00ce3873 | 880 | |
e10a4644 | 881 | opp = _find_key_ceil(dev, &temp, index, true, _read_bw, NULL); |
add1dc09 | 882 | *bw = temp; |
00ce3873 KK |
883 | return opp; |
884 | } | |
885 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_ceil); | |
886 | ||
887 | /** | |
888 | * dev_pm_opp_find_bw_floor() - Search for a rounded floor bandwidth | |
889 | * @dev: device for which we do this operation | |
617df304 | 890 | * @bw: start bandwidth |
00ce3873 KK |
891 | * @index: which bandwidth to compare, in case of OPPs with several values |
892 | * | |
893 | * Search for the matching floor *available* OPP from a starting bandwidth | |
894 | * for a device. | |
895 | * | |
896 | * Return: matching *opp and refreshes *bw accordingly, else returns | |
897 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return | |
898 | * values can be: | |
899 | * EINVAL: for bad pointer | |
900 | * ERANGE: no match found for search | |
901 | * ENODEV: if device not found in list of registered devices | |
902 | * | |
903 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
904 | * use. | |
905 | */ | |
906 | struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev, | |
907 | unsigned int *bw, int index) | |
908 | { | |
add1dc09 VK |
909 | unsigned long temp = *bw; |
910 | struct dev_pm_opp *opp; | |
00ce3873 | 911 | |
e10a4644 | 912 | opp = _find_key_floor(dev, &temp, index, true, _read_bw, NULL); |
add1dc09 | 913 | *bw = temp; |
00ce3873 KK |
914 | return opp; |
915 | } | |
916 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_floor); | |
917 | ||
6a0712f6 | 918 | static int _set_opp_voltage(struct device *dev, struct regulator *reg, |
ce31781a | 919 | struct dev_pm_opp_supply *supply) |
6a0712f6 VK |
920 | { |
921 | int ret; | |
922 | ||
923 | /* Regulator not available for device */ | |
924 | if (IS_ERR(reg)) { | |
925 | dev_dbg(dev, "%s: regulator not available: %ld\n", __func__, | |
926 | PTR_ERR(reg)); | |
927 | return 0; | |
928 | } | |
929 | ||
ce31781a VK |
930 | dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, |
931 | supply->u_volt_min, supply->u_volt, supply->u_volt_max); | |
6a0712f6 | 932 | |
ce31781a VK |
933 | ret = regulator_set_voltage_triplet(reg, supply->u_volt_min, |
934 | supply->u_volt, supply->u_volt_max); | |
6a0712f6 VK |
935 | if (ret) |
936 | dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n", | |
ce31781a VK |
937 | __func__, supply->u_volt_min, supply->u_volt, |
938 | supply->u_volt_max, ret); | |
6a0712f6 VK |
939 | |
940 | return ret; | |
941 | } | |
942 | ||
2083da24 VK |
943 | static int |
944 | _opp_config_clk_single(struct device *dev, struct opp_table *opp_table, | |
945 | struct dev_pm_opp *opp, void *data, bool scaling_down) | |
94735585 | 946 | { |
1efae8d2 VK |
947 | unsigned long *target = data; |
948 | unsigned long freq; | |
94735585 VK |
949 | int ret; |
950 | ||
1efae8d2 VK |
951 | /* One of target and opp must be available */ |
952 | if (target) { | |
953 | freq = *target; | |
954 | } else if (opp) { | |
2083da24 | 955 | freq = opp->rates[0]; |
1efae8d2 VK |
956 | } else { |
957 | WARN_ON(1); | |
958 | return -EINVAL; | |
959 | } | |
960 | ||
961 | ret = clk_set_rate(opp_table->clk, freq); | |
94735585 VK |
962 | if (ret) { |
963 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, | |
964 | ret); | |
1efae8d2 | 965 | } else { |
dcfec12b | 966 | opp_table->current_rate_single_clk = freq; |
94735585 VK |
967 | } |
968 | ||
969 | return ret; | |
970 | } | |
971 | ||
8174a3a6 VK |
972 | /* |
973 | * Simple implementation for configuring multiple clocks. Configure clocks in | |
974 | * the order in which they are present in the array while scaling up. | |
975 | */ | |
976 | int dev_pm_opp_config_clks_simple(struct device *dev, | |
977 | struct opp_table *opp_table, struct dev_pm_opp *opp, void *data, | |
978 | bool scaling_down) | |
979 | { | |
980 | int ret, i; | |
981 | ||
982 | if (scaling_down) { | |
983 | for (i = opp_table->clk_count - 1; i >= 0; i--) { | |
984 | ret = clk_set_rate(opp_table->clks[i], opp->rates[i]); | |
985 | if (ret) { | |
986 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, | |
987 | ret); | |
988 | return ret; | |
989 | } | |
990 | } | |
991 | } else { | |
992 | for (i = 0; i < opp_table->clk_count; i++) { | |
993 | ret = clk_set_rate(opp_table->clks[i], opp->rates[i]); | |
994 | if (ret) { | |
995 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, | |
996 | ret); | |
997 | return ret; | |
998 | } | |
999 | } | |
1000 | } | |
1001 | ||
d36cb843 | 1002 | return 0; |
8174a3a6 VK |
1003 | } |
1004 | EXPORT_SYMBOL_GPL(dev_pm_opp_config_clks_simple); | |
1005 | ||
c522ce8a VK |
1006 | static int _opp_config_regulator_single(struct device *dev, |
1007 | struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp, | |
1008 | struct regulator **regulators, unsigned int count) | |
94735585 | 1009 | { |
c522ce8a | 1010 | struct regulator *reg = regulators[0]; |
94735585 VK |
1011 | int ret; |
1012 | ||
1013 | /* This function only supports single regulator per device */ | |
c522ce8a | 1014 | if (WARN_ON(count > 1)) { |
94735585 VK |
1015 | dev_err(dev, "multiple regulators are not supported\n"); |
1016 | return -EINVAL; | |
1017 | } | |
1018 | ||
c522ce8a | 1019 | ret = _set_opp_voltage(dev, reg, new_opp->supplies); |
94735585 | 1020 | if (ret) |
c522ce8a | 1021 | return ret; |
94735585 | 1022 | |
8d45719c KK |
1023 | /* |
1024 | * Enable the regulator after setting its voltages, otherwise it breaks | |
1025 | * some boot-enabled regulators. | |
1026 | */ | |
c522ce8a | 1027 | if (unlikely(!new_opp->opp_table->enabled)) { |
8d45719c KK |
1028 | ret = regulator_enable(reg); |
1029 | if (ret < 0) | |
1030 | dev_warn(dev, "Failed to enable regulator: %d", ret); | |
8d45719c KK |
1031 | } |
1032 | ||
94735585 | 1033 | return 0; |
94735585 VK |
1034 | } |
1035 | ||
b00e667a | 1036 | static int _set_opp_bw(const struct opp_table *opp_table, |
240ae50e | 1037 | struct dev_pm_opp *opp, struct device *dev) |
b00e667a VK |
1038 | { |
1039 | u32 avg, peak; | |
1040 | int i, ret; | |
1041 | ||
1042 | if (!opp_table->paths) | |
1043 | return 0; | |
1044 | ||
1045 | for (i = 0; i < opp_table->path_count; i++) { | |
240ae50e | 1046 | if (!opp) { |
b00e667a VK |
1047 | avg = 0; |
1048 | peak = 0; | |
1049 | } else { | |
1050 | avg = opp->bandwidth[i].avg; | |
1051 | peak = opp->bandwidth[i].peak; | |
1052 | } | |
1053 | ret = icc_set_bw(opp_table->paths[i], avg, peak); | |
1054 | if (ret) { | |
1055 | dev_err(dev, "Failed to %s bandwidth[%d]: %d\n", | |
240ae50e | 1056 | opp ? "set" : "remove", i, ret); |
b00e667a VK |
1057 | return ret; |
1058 | } | |
1059 | } | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
e37440e7 VK |
1064 | /* This is only called for PM domain for now */ |
1065 | static int _set_required_opps(struct device *dev, struct opp_table *opp_table, | |
1066 | struct dev_pm_opp *opp, bool up) | |
ca1b5d77 | 1067 | { |
e37440e7 | 1068 | struct device **devs = opp_table->required_devs; |
ab7a781f | 1069 | struct dev_pm_opp *required_opp; |
48b5aaec | 1070 | int index, target, delta, ret; |
c2bebf98 | 1071 | |
e37440e7 | 1072 | if (!devs) |
6d366d0e VK |
1073 | return 0; |
1074 | ||
e37440e7 VK |
1075 | /* required-opps not fully initialized yet */ |
1076 | if (lazy_linking_pending(opp_table)) | |
1077 | return -EBUSY; | |
1078 | ||
c2bebf98 | 1079 | /* Scaling up? Set required OPPs in normal order, else reverse */ |
e37440e7 | 1080 | if (up) { |
c2bebf98 VK |
1081 | index = 0; |
1082 | target = opp_table->required_opp_count; | |
1083 | delta = 1; | |
1084 | } else { | |
1085 | index = opp_table->required_opp_count - 1; | |
1086 | target = -1; | |
1087 | delta = -1; | |
1088 | } | |
ca1b5d77 | 1089 | |
c2bebf98 | 1090 | while (index != target) { |
e37440e7 | 1091 | if (devs[index]) { |
ab7a781f BD |
1092 | required_opp = opp ? opp->required_opps[index] : NULL; |
1093 | ||
1094 | ret = dev_pm_opp_set_opp(devs[index], required_opp); | |
e37440e7 VK |
1095 | if (ret) |
1096 | return ret; | |
1097 | } | |
c2bebf98 VK |
1098 | |
1099 | index += delta; | |
ca1b5d77 | 1100 | } |
2c59138c | 1101 | |
48b5aaec | 1102 | return 0; |
ca1b5d77 VK |
1103 | } |
1104 | ||
0025ff64 UH |
1105 | static int _set_opp_level(struct device *dev, struct opp_table *opp_table, |
1106 | struct dev_pm_opp *opp) | |
1107 | { | |
1108 | unsigned int level = 0; | |
1109 | int ret = 0; | |
1110 | ||
1111 | if (opp) { | |
073d3d2c | 1112 | if (opp->level == OPP_LEVEL_UNSET) |
0025ff64 UH |
1113 | return 0; |
1114 | ||
1115 | level = opp->level; | |
1116 | } | |
1117 | ||
1118 | /* Request a new performance state through the device's PM domain. */ | |
1119 | ret = dev_pm_domain_set_performance_state(dev, level); | |
1120 | if (ret) | |
1121 | dev_err(dev, "Failed to set performance state %u (%d)\n", level, | |
1122 | ret); | |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
81c4d8a3 VK |
1127 | static void _find_current_opp(struct device *dev, struct opp_table *opp_table) |
1128 | { | |
1129 | struct dev_pm_opp *opp = ERR_PTR(-ENODEV); | |
1130 | unsigned long freq; | |
1131 | ||
1132 | if (!IS_ERR(opp_table->clk)) { | |
1133 | freq = clk_get_rate(opp_table->clk); | |
1134 | opp = _find_freq_ceil(opp_table, &freq); | |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * Unable to find the current OPP ? Pick the first from the list since | |
1139 | * it is in ascending order, otherwise rest of the code will need to | |
1140 | * make special checks to validate current_opp. | |
1141 | */ | |
1142 | if (IS_ERR(opp)) { | |
1143 | mutex_lock(&opp_table->lock); | |
1144 | opp = list_first_entry(&opp_table->opp_list, struct dev_pm_opp, node); | |
1145 | dev_pm_opp_get(opp); | |
1146 | mutex_unlock(&opp_table->lock); | |
1147 | } | |
1148 | ||
1149 | opp_table->current_opp = opp; | |
1150 | } | |
1151 | ||
5ad58bba | 1152 | static int _disable_opp_table(struct device *dev, struct opp_table *opp_table) |
f3364e17 VK |
1153 | { |
1154 | int ret; | |
1155 | ||
1156 | if (!opp_table->enabled) | |
1157 | return 0; | |
1158 | ||
1159 | /* | |
1160 | * Some drivers need to support cases where some platforms may | |
1161 | * have OPP table for the device, while others don't and | |
1162 | * opp_set_rate() just needs to behave like clk_set_rate(). | |
1163 | */ | |
1164 | if (!_get_opp_count(opp_table)) | |
1165 | return 0; | |
1166 | ||
240ae50e | 1167 | ret = _set_opp_bw(opp_table, NULL, dev); |
f3364e17 VK |
1168 | if (ret) |
1169 | return ret; | |
1170 | ||
1171 | if (opp_table->regulators) | |
1172 | regulator_disable(opp_table->regulators[0]); | |
1173 | ||
0025ff64 UH |
1174 | ret = _set_opp_level(dev, opp_table, NULL); |
1175 | if (ret) | |
1176 | goto out; | |
1177 | ||
2c59138c | 1178 | ret = _set_required_opps(dev, opp_table, NULL, false); |
f3364e17 | 1179 | |
0025ff64 | 1180 | out: |
f3364e17 VK |
1181 | opp_table->enabled = false; |
1182 | return ret; | |
1183 | } | |
1184 | ||
386ba854 | 1185 | static int _set_opp(struct device *dev, struct opp_table *opp_table, |
1efae8d2 | 1186 | struct dev_pm_opp *opp, void *clk_data, bool forced) |
6a0712f6 | 1187 | { |
386ba854 | 1188 | struct dev_pm_opp *old_opp; |
f0b88fa4 | 1189 | int scaling_down, ret; |
6a0712f6 | 1190 | |
386ba854 VK |
1191 | if (unlikely(!opp)) |
1192 | return _disable_opp_table(dev, opp_table); | |
aca48b61 | 1193 | |
81c4d8a3 VK |
1194 | /* Find the currently set OPP if we don't know already */ |
1195 | if (unlikely(!opp_table->current_opp)) | |
1196 | _find_current_opp(dev, opp_table); | |
6a0712f6 | 1197 | |
81c4d8a3 | 1198 | old_opp = opp_table->current_opp; |
81c4d8a3 VK |
1199 | |
1200 | /* Return early if nothing to do */ | |
1efae8d2 | 1201 | if (!forced && old_opp == opp && opp_table->enabled) { |
9e28f7a7 | 1202 | dev_dbg_ratelimited(dev, "%s: OPPs are same, nothing to do\n", __func__); |
386ba854 | 1203 | return 0; |
6a0712f6 VK |
1204 | } |
1205 | ||
f0b88fa4 | 1206 | dev_dbg(dev, "%s: switching OPP: Freq %lu -> %lu Hz, Level %u -> %u, Bw %u -> %u\n", |
2083da24 VK |
1207 | __func__, old_opp->rates[0], opp->rates[0], old_opp->level, |
1208 | opp->level, old_opp->bandwidth ? old_opp->bandwidth[0].peak : 0, | |
f0b88fa4 VK |
1209 | opp->bandwidth ? opp->bandwidth[0].peak : 0); |
1210 | ||
2083da24 | 1211 | scaling_down = _opp_compare_key(opp_table, old_opp, opp); |
f0b88fa4 VK |
1212 | if (scaling_down == -1) |
1213 | scaling_down = 0; | |
dfbe4678 | 1214 | |
ca1b5d77 | 1215 | /* Scaling up? Configure required OPPs before frequency */ |
f0b88fa4 | 1216 | if (!scaling_down) { |
2c59138c | 1217 | ret = _set_required_opps(dev, opp_table, opp, true); |
870d5d96 VK |
1218 | if (ret) { |
1219 | dev_err(dev, "Failed to set required opps: %d\n", ret); | |
1220 | return ret; | |
1221 | } | |
1222 | ||
0025ff64 UH |
1223 | ret = _set_opp_level(dev, opp_table, opp); |
1224 | if (ret) | |
1225 | return ret; | |
1226 | ||
870d5d96 VK |
1227 | ret = _set_opp_bw(opp_table, opp, dev); |
1228 | if (ret) { | |
1229 | dev_err(dev, "Failed to set bw: %d\n", ret); | |
386ba854 | 1230 | return ret; |
870d5d96 | 1231 | } |
aee3352f VK |
1232 | |
1233 | if (opp_table->config_regulators) { | |
1234 | ret = opp_table->config_regulators(dev, old_opp, opp, | |
1235 | opp_table->regulators, | |
1236 | opp_table->regulator_count); | |
1237 | if (ret) { | |
1238 | dev_err(dev, "Failed to set regulator voltages: %d\n", | |
1239 | ret); | |
1240 | return ret; | |
1241 | } | |
1242 | } | |
ca1b5d77 VK |
1243 | } |
1244 | ||
2083da24 VK |
1245 | if (opp_table->config_clks) { |
1246 | ret = opp_table->config_clks(dev, opp_table, opp, clk_data, scaling_down); | |
1247 | if (ret) | |
1248 | return ret; | |
1249 | } | |
870d5d96 | 1250 | |
ca1b5d77 | 1251 | /* Scaling down? Configure required OPPs after frequency */ |
870d5d96 | 1252 | if (scaling_down) { |
aee3352f VK |
1253 | if (opp_table->config_regulators) { |
1254 | ret = opp_table->config_regulators(dev, old_opp, opp, | |
1255 | opp_table->regulators, | |
1256 | opp_table->regulator_count); | |
1257 | if (ret) { | |
1258 | dev_err(dev, "Failed to set regulator voltages: %d\n", | |
1259 | ret); | |
1260 | return ret; | |
1261 | } | |
1262 | } | |
1263 | ||
870d5d96 VK |
1264 | ret = _set_opp_bw(opp_table, opp, dev); |
1265 | if (ret) { | |
1266 | dev_err(dev, "Failed to set bw: %d\n", ret); | |
1267 | return ret; | |
1268 | } | |
1269 | ||
0025ff64 UH |
1270 | ret = _set_opp_level(dev, opp_table, opp); |
1271 | if (ret) | |
1272 | return ret; | |
1273 | ||
2c59138c | 1274 | ret = _set_required_opps(dev, opp_table, opp, false); |
870d5d96 | 1275 | if (ret) { |
ca1b5d77 | 1276 | dev_err(dev, "Failed to set required opps: %d\n", ret); |
870d5d96 VK |
1277 | return ret; |
1278 | } | |
dfbe4678 VK |
1279 | } |
1280 | ||
870d5d96 VK |
1281 | opp_table->enabled = true; |
1282 | dev_pm_opp_put(old_opp); | |
81c4d8a3 | 1283 | |
870d5d96 VK |
1284 | /* Make sure current_opp doesn't get freed */ |
1285 | dev_pm_opp_get(opp); | |
1286 | opp_table->current_opp = opp; | |
fe2af402 | 1287 | |
386ba854 VK |
1288 | return ret; |
1289 | } | |
1290 | ||
1291 | /** | |
1292 | * dev_pm_opp_set_rate() - Configure new OPP based on frequency | |
1293 | * @dev: device for which we do this operation | |
1294 | * @target_freq: frequency to achieve | |
1295 | * | |
1296 | * This configures the power-supplies to the levels specified by the OPP | |
1297 | * corresponding to the target_freq, and programs the clock to a value <= | |
1298 | * target_freq, as rounded by clk_round_rate(). Device wanting to run at fmax | |
1299 | * provided by the opp, should have already rounded to the target OPP's | |
1300 | * frequency. | |
1301 | */ | |
1302 | int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) | |
1303 | { | |
1304 | struct opp_table *opp_table; | |
1305 | unsigned long freq = 0, temp_freq; | |
1306 | struct dev_pm_opp *opp = NULL; | |
1efae8d2 | 1307 | bool forced = false; |
386ba854 VK |
1308 | int ret; |
1309 | ||
1310 | opp_table = _find_opp_table(dev); | |
1311 | if (IS_ERR(opp_table)) { | |
1312 | dev_err(dev, "%s: device's opp table doesn't exist\n", __func__); | |
1313 | return PTR_ERR(opp_table); | |
1314 | } | |
1315 | ||
1316 | if (target_freq) { | |
1317 | /* | |
1318 | * For IO devices which require an OPP on some platforms/SoCs | |
1319 | * while just needing to scale the clock on some others | |
1320 | * we look for empty OPP tables with just a clock handle and | |
1321 | * scale only the clk. This makes dev_pm_opp_set_rate() | |
1322 | * equivalent to a clk_set_rate() | |
1323 | */ | |
1324 | if (!_get_opp_count(opp_table)) { | |
2083da24 VK |
1325 | ret = opp_table->config_clks(dev, opp_table, NULL, |
1326 | &target_freq, false); | |
386ba854 VK |
1327 | goto put_opp_table; |
1328 | } | |
1329 | ||
1330 | freq = clk_round_rate(opp_table->clk, target_freq); | |
1331 | if ((long)freq <= 0) | |
1332 | freq = target_freq; | |
1333 | ||
1334 | /* | |
1335 | * The clock driver may support finer resolution of the | |
1336 | * frequencies than the OPP table, don't update the frequency we | |
1337 | * pass to clk_set_rate() here. | |
1338 | */ | |
1339 | temp_freq = freq; | |
1340 | opp = _find_freq_ceil(opp_table, &temp_freq); | |
1341 | if (IS_ERR(opp)) { | |
1342 | ret = PTR_ERR(opp); | |
1343 | dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", | |
1344 | __func__, freq, ret); | |
1345 | goto put_opp_table; | |
1346 | } | |
1efae8d2 VK |
1347 | |
1348 | /* | |
1349 | * An OPP entry specifies the highest frequency at which other | |
1350 | * properties of the OPP entry apply. Even if the new OPP is | |
1351 | * same as the old one, we may still reach here for a different | |
1352 | * value of the frequency. In such a case, do not abort but | |
1353 | * configure the hardware to the desired frequency forcefully. | |
1354 | */ | |
dcfec12b | 1355 | forced = opp_table->current_rate_single_clk != freq; |
386ba854 VK |
1356 | } |
1357 | ||
7269c250 | 1358 | ret = _set_opp(dev, opp_table, opp, &freq, forced); |
386ba854 | 1359 | |
7269c250 | 1360 | if (freq) |
386ba854 | 1361 | dev_pm_opp_put(opp); |
1efae8d2 | 1362 | |
052c6f19 | 1363 | put_opp_table: |
5b650b38 | 1364 | dev_pm_opp_put_opp_table(opp_table); |
052c6f19 | 1365 | return ret; |
6a0712f6 VK |
1366 | } |
1367 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); | |
1368 | ||
abbe3483 VK |
1369 | /** |
1370 | * dev_pm_opp_set_opp() - Configure device for OPP | |
1371 | * @dev: device for which we do this operation | |
1372 | * @opp: OPP to set to | |
1373 | * | |
1374 | * This configures the device based on the properties of the OPP passed to this | |
1375 | * routine. | |
1376 | * | |
1377 | * Return: 0 on success, a negative error number otherwise. | |
1378 | */ | |
1379 | int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp) | |
1380 | { | |
1381 | struct opp_table *opp_table; | |
1382 | int ret; | |
1383 | ||
1384 | opp_table = _find_opp_table(dev); | |
1385 | if (IS_ERR(opp_table)) { | |
1386 | dev_err(dev, "%s: device opp doesn't exist\n", __func__); | |
1387 | return PTR_ERR(opp_table); | |
1388 | } | |
1389 | ||
1efae8d2 | 1390 | ret = _set_opp(dev, opp_table, opp, NULL, false); |
abbe3483 VK |
1391 | dev_pm_opp_put_opp_table(opp_table); |
1392 | ||
1393 | return ret; | |
1394 | } | |
1395 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp); | |
1396 | ||
2c2709dc | 1397 | /* OPP-dev Helpers */ |
2c2709dc VK |
1398 | static void _remove_opp_dev(struct opp_device *opp_dev, |
1399 | struct opp_table *opp_table) | |
06441658 | 1400 | { |
2c2709dc VK |
1401 | opp_debug_unregister(opp_dev, opp_table); |
1402 | list_del(&opp_dev->node); | |
052c6f19 | 1403 | kfree(opp_dev); |
06441658 VK |
1404 | } |
1405 | ||
ef43f01a VK |
1406 | struct opp_device *_add_opp_dev(const struct device *dev, |
1407 | struct opp_table *opp_table) | |
06441658 | 1408 | { |
2c2709dc | 1409 | struct opp_device *opp_dev; |
06441658 | 1410 | |
2c2709dc VK |
1411 | opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL); |
1412 | if (!opp_dev) | |
06441658 VK |
1413 | return NULL; |
1414 | ||
2c2709dc VK |
1415 | /* Initialize opp-dev */ |
1416 | opp_dev->dev = dev; | |
3d255699 | 1417 | |
ef43f01a | 1418 | mutex_lock(&opp_table->lock); |
052c6f19 | 1419 | list_add(&opp_dev->node, &opp_table->dev_list); |
ef43f01a | 1420 | mutex_unlock(&opp_table->lock); |
06441658 | 1421 | |
2c2709dc | 1422 | /* Create debugfs entries for the opp_table */ |
a2dea4cb | 1423 | opp_debug_register(opp_dev, opp_table); |
283d55e6 VK |
1424 | |
1425 | return opp_dev; | |
1426 | } | |
1427 | ||
eb7c8743 | 1428 | static struct opp_table *_allocate_opp_table(struct device *dev, int index) |
07cce74a | 1429 | { |
2c2709dc VK |
1430 | struct opp_table *opp_table; |
1431 | struct opp_device *opp_dev; | |
d54974c2 | 1432 | int ret; |
07cce74a VK |
1433 | |
1434 | /* | |
2c2709dc | 1435 | * Allocate a new OPP table. In the infrequent case where a new |
07cce74a VK |
1436 | * device is needed to be added, we pay this penalty. |
1437 | */ | |
2c2709dc VK |
1438 | opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL); |
1439 | if (!opp_table) | |
dd461cd9 | 1440 | return ERR_PTR(-ENOMEM); |
07cce74a | 1441 | |
3d255699 | 1442 | mutex_init(&opp_table->lock); |
2c2709dc | 1443 | INIT_LIST_HEAD(&opp_table->dev_list); |
7eba0c76 | 1444 | INIT_LIST_HEAD(&opp_table->lazy); |
06441658 | 1445 | |
2083da24 VK |
1446 | opp_table->clk = ERR_PTR(-ENODEV); |
1447 | ||
46f48aca VK |
1448 | /* Mark regulator count uninitialized */ |
1449 | opp_table->regulator_count = -1; | |
1450 | ||
2c2709dc VK |
1451 | opp_dev = _add_opp_dev(dev, opp_table); |
1452 | if (!opp_dev) { | |
dd461cd9 SG |
1453 | ret = -ENOMEM; |
1454 | goto err; | |
06441658 VK |
1455 | } |
1456 | ||
eb7c8743 | 1457 | _of_init_opp_table(opp_table, dev, index); |
50f8cfbd | 1458 | |
6d3f922c GD |
1459 | /* Find interconnect path(s) for the device */ |
1460 | ret = dev_pm_opp_of_find_icc_paths(dev, opp_table); | |
dd461cd9 SG |
1461 | if (ret) { |
1462 | if (ret == -EPROBE_DEFER) | |
32439ac7 | 1463 | goto remove_opp_dev; |
dd461cd9 | 1464 | |
6d3f922c GD |
1465 | dev_warn(dev, "%s: Error finding interconnect paths: %d\n", |
1466 | __func__, ret); | |
dd461cd9 | 1467 | } |
6d3f922c | 1468 | |
052c6f19 | 1469 | BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head); |
2c2709dc | 1470 | INIT_LIST_HEAD(&opp_table->opp_list); |
f067a982 | 1471 | kref_init(&opp_table->kref); |
07cce74a | 1472 | |
2c2709dc | 1473 | return opp_table; |
dd461cd9 | 1474 | |
976509bb | 1475 | remove_opp_dev: |
b2a2ab03 | 1476 | _of_clear_opp_table(opp_table); |
976509bb | 1477 | _remove_opp_dev(opp_dev, opp_table); |
b2a2ab03 | 1478 | mutex_destroy(&opp_table->lock); |
dd461cd9 SG |
1479 | err: |
1480 | kfree(opp_table); | |
1481 | return ERR_PTR(ret); | |
07cce74a VK |
1482 | } |
1483 | ||
f067a982 | 1484 | void _get_opp_table_kref(struct opp_table *opp_table) |
b6160e26 | 1485 | { |
f067a982 VK |
1486 | kref_get(&opp_table->kref); |
1487 | } | |
1488 | ||
32439ac7 VK |
1489 | static struct opp_table *_update_opp_table_clk(struct device *dev, |
1490 | struct opp_table *opp_table, | |
1491 | bool getclk) | |
1492 | { | |
d4a4c7a4 VK |
1493 | int ret; |
1494 | ||
32439ac7 | 1495 | /* |
2083da24 | 1496 | * Return early if we don't need to get clk or we have already done it |
32439ac7 VK |
1497 | * earlier. |
1498 | */ | |
2083da24 VK |
1499 | if (!getclk || IS_ERR(opp_table) || !IS_ERR(opp_table->clk) || |
1500 | opp_table->clks) | |
32439ac7 VK |
1501 | return opp_table; |
1502 | ||
1503 | /* Find clk for the device */ | |
1504 | opp_table->clk = clk_get(dev, NULL); | |
32439ac7 | 1505 | |
d4a4c7a4 | 1506 | ret = PTR_ERR_OR_ZERO(opp_table->clk); |
2083da24 VK |
1507 | if (!ret) { |
1508 | opp_table->config_clks = _opp_config_clk_single; | |
1509 | opp_table->clk_count = 1; | |
d4a4c7a4 | 1510 | return opp_table; |
2083da24 | 1511 | } |
32439ac7 | 1512 | |
d4a4c7a4 | 1513 | if (ret == -ENOENT) { |
2083da24 VK |
1514 | /* |
1515 | * There are few platforms which don't want the OPP core to | |
1516 | * manage device's clock settings. In such cases neither the | |
1517 | * platform provides the clks explicitly to us, nor the DT | |
1518 | * contains a valid clk entry. The OPP nodes in DT may still | |
1519 | * contain "opp-hz" property though, which we need to parse and | |
1520 | * allow the platform to find an OPP based on freq later on. | |
1521 | * | |
1522 | * This is a simple solution to take care of such corner cases, | |
1523 | * i.e. make the clk_count 1, which lets us allocate space for | |
1524 | * frequency in opp->rates and also parse the entries in DT. | |
1525 | */ | |
1526 | opp_table->clk_count = 1; | |
1527 | ||
32439ac7 | 1528 | dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret); |
d4a4c7a4 | 1529 | return opp_table; |
32439ac7 VK |
1530 | } |
1531 | ||
d4a4c7a4 VK |
1532 | dev_pm_opp_put_opp_table(opp_table); |
1533 | dev_err_probe(dev, ret, "Couldn't find clock\n"); | |
1534 | ||
1535 | return ERR_PTR(ret); | |
32439ac7 VK |
1536 | } |
1537 | ||
27c09484 VK |
1538 | /* |
1539 | * We need to make sure that the OPP table for a device doesn't get added twice, | |
1540 | * if this routine gets called in parallel with the same device pointer. | |
1541 | * | |
1542 | * The simplest way to enforce that is to perform everything (find existing | |
1543 | * table and if not found, create a new one) under the opp_table_lock, so only | |
1544 | * one creator gets access to the same. But that expands the critical section | |
1545 | * under the lock and may end up causing circular dependencies with frameworks | |
1546 | * like debugfs, interconnect or clock framework as they may be direct or | |
1547 | * indirect users of OPP core. | |
1548 | * | |
1549 | * And for that reason we have to go for a bit tricky implementation here, which | |
1550 | * uses the opp_tables_busy flag to indicate if another creator is in the middle | |
1551 | * of adding an OPP table and others should wait for it to finish. | |
1552 | */ | |
32439ac7 VK |
1553 | struct opp_table *_add_opp_table_indexed(struct device *dev, int index, |
1554 | bool getclk) | |
f067a982 VK |
1555 | { |
1556 | struct opp_table *opp_table; | |
1557 | ||
27c09484 | 1558 | again: |
f067a982 VK |
1559 | mutex_lock(&opp_table_lock); |
1560 | ||
5b650b38 VK |
1561 | opp_table = _find_opp_table_unlocked(dev); |
1562 | if (!IS_ERR(opp_table)) | |
f067a982 | 1563 | goto unlock; |
f067a982 | 1564 | |
27c09484 VK |
1565 | /* |
1566 | * The opp_tables list or an OPP table's dev_list is getting updated by | |
1567 | * another user, wait for it to finish. | |
1568 | */ | |
1569 | if (unlikely(opp_tables_busy)) { | |
1570 | mutex_unlock(&opp_table_lock); | |
1571 | cpu_relax(); | |
1572 | goto again; | |
1573 | } | |
1574 | ||
1575 | opp_tables_busy = true; | |
283d55e6 | 1576 | opp_table = _managed_opp(dev, index); |
27c09484 VK |
1577 | |
1578 | /* Drop the lock to reduce the size of critical section */ | |
1579 | mutex_unlock(&opp_table_lock); | |
1580 | ||
283d55e6 | 1581 | if (opp_table) { |
ef43f01a | 1582 | if (!_add_opp_dev(dev, opp_table)) { |
283d55e6 | 1583 | dev_pm_opp_put_opp_table(opp_table); |
dd461cd9 | 1584 | opp_table = ERR_PTR(-ENOMEM); |
283d55e6 | 1585 | } |
27c09484 VK |
1586 | |
1587 | mutex_lock(&opp_table_lock); | |
1588 | } else { | |
1589 | opp_table = _allocate_opp_table(dev, index); | |
1590 | ||
1591 | mutex_lock(&opp_table_lock); | |
1592 | if (!IS_ERR(opp_table)) | |
1593 | list_add(&opp_table->node, &opp_tables); | |
283d55e6 VK |
1594 | } |
1595 | ||
27c09484 | 1596 | opp_tables_busy = false; |
f067a982 VK |
1597 | |
1598 | unlock: | |
1599 | mutex_unlock(&opp_table_lock); | |
1600 | ||
32439ac7 | 1601 | return _update_opp_table_clk(dev, opp_table, getclk); |
f067a982 | 1602 | } |
eb7c8743 | 1603 | |
32439ac7 | 1604 | static struct opp_table *_add_opp_table(struct device *dev, bool getclk) |
eb7c8743 | 1605 | { |
32439ac7 | 1606 | return _add_opp_table_indexed(dev, 0, getclk); |
eb7c8743 | 1607 | } |
f067a982 | 1608 | |
e77dcb0b | 1609 | struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) |
eb7c8743 | 1610 | { |
e77dcb0b | 1611 | return _find_opp_table(dev); |
eb7c8743 | 1612 | } |
e77dcb0b | 1613 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table); |
eb7c8743 | 1614 | |
b83c1899 | 1615 | static void _opp_table_kref_release(struct kref *kref) |
f067a982 VK |
1616 | { |
1617 | struct opp_table *opp_table = container_of(kref, struct opp_table, kref); | |
cdd6ed90 | 1618 | struct opp_device *opp_dev, *temp; |
6d3f922c | 1619 | int i; |
b6160e26 | 1620 | |
e0df59de VK |
1621 | /* Drop the lock as soon as we can */ |
1622 | list_del(&opp_table->node); | |
1623 | mutex_unlock(&opp_table_lock); | |
1624 | ||
81c4d8a3 VK |
1625 | if (opp_table->current_opp) |
1626 | dev_pm_opp_put(opp_table->current_opp); | |
1627 | ||
5d6d106f VK |
1628 | _of_clear_opp_table(opp_table); |
1629 | ||
2083da24 | 1630 | /* Release automatically acquired single clk */ |
b6160e26 VK |
1631 | if (!IS_ERR(opp_table->clk)) |
1632 | clk_put(opp_table->clk); | |
1633 | ||
6d3f922c GD |
1634 | if (opp_table->paths) { |
1635 | for (i = 0; i < opp_table->path_count; i++) | |
1636 | icc_put(opp_table->paths[i]); | |
1637 | kfree(opp_table->paths); | |
1638 | } | |
1639 | ||
cdd6ed90 | 1640 | WARN_ON(!list_empty(&opp_table->opp_list)); |
b6160e26 | 1641 | |
04bd2eaf | 1642 | list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) |
cdd6ed90 | 1643 | _remove_opp_dev(opp_dev, opp_table); |
b6160e26 | 1644 | |
37a73ec0 | 1645 | mutex_destroy(&opp_table->lock); |
052c6f19 | 1646 | kfree(opp_table); |
f067a982 VK |
1647 | } |
1648 | ||
1649 | void dev_pm_opp_put_opp_table(struct opp_table *opp_table) | |
1650 | { | |
1651 | kref_put_mutex(&opp_table->kref, _opp_table_kref_release, | |
1652 | &opp_table_lock); | |
1653 | } | |
1654 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); | |
1655 | ||
8cd2f6e8 | 1656 | void _opp_free(struct dev_pm_opp *opp) |
969fceb3 VK |
1657 | { |
1658 | kfree(opp); | |
969fceb3 VK |
1659 | } |
1660 | ||
cf1fac94 | 1661 | static void _opp_kref_release(struct kref *kref) |
129eec55 | 1662 | { |
cf1fac94 VK |
1663 | struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref); |
1664 | struct opp_table *opp_table = opp->opp_table; | |
1665 | ||
1666 | list_del(&opp->node); | |
1667 | mutex_unlock(&opp_table->lock); | |
1668 | ||
129eec55 VK |
1669 | /* |
1670 | * Notify the changes in the availability of the operable | |
1671 | * frequency/voltage list. | |
1672 | */ | |
052c6f19 | 1673 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp); |
3466ea2c | 1674 | _of_clear_opp(opp_table, opp); |
deaa5146 | 1675 | opp_debug_remove_one(opp); |
052c6f19 | 1676 | kfree(opp); |
1690d8bb | 1677 | } |
129eec55 | 1678 | |
a88bd2a5 | 1679 | void dev_pm_opp_get(struct dev_pm_opp *opp) |
8a31d9d9 VK |
1680 | { |
1681 | kref_get(&opp->kref); | |
1682 | } | |
1683 | ||
7034764a VK |
1684 | void dev_pm_opp_put(struct dev_pm_opp *opp) |
1685 | { | |
cf1fac94 | 1686 | kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock); |
7034764a VK |
1687 | } |
1688 | EXPORT_SYMBOL_GPL(dev_pm_opp_put); | |
1689 | ||
129eec55 | 1690 | /** |
2c2709dc | 1691 | * dev_pm_opp_remove() - Remove an OPP from OPP table |
129eec55 VK |
1692 | * @dev: device for which we do this operation |
1693 | * @freq: OPP to remove with matching 'freq' | |
1694 | * | |
2c2709dc | 1695 | * This function removes an opp from the opp table. |
129eec55 VK |
1696 | */ |
1697 | void dev_pm_opp_remove(struct device *dev, unsigned long freq) | |
1698 | { | |
95073b72 | 1699 | struct dev_pm_opp *opp = NULL, *iter; |
2c2709dc | 1700 | struct opp_table *opp_table; |
129eec55 | 1701 | |
2c2709dc VK |
1702 | opp_table = _find_opp_table(dev); |
1703 | if (IS_ERR(opp_table)) | |
5b650b38 | 1704 | return; |
129eec55 | 1705 | |
f123ea74 VK |
1706 | if (!assert_single_clk(opp_table)) |
1707 | goto put_table; | |
1708 | ||
37a73ec0 VK |
1709 | mutex_lock(&opp_table->lock); |
1710 | ||
95073b72 | 1711 | list_for_each_entry(iter, &opp_table->opp_list, node) { |
2083da24 | 1712 | if (iter->rates[0] == freq) { |
95073b72 | 1713 | opp = iter; |
129eec55 VK |
1714 | break; |
1715 | } | |
1716 | } | |
1717 | ||
37a73ec0 VK |
1718 | mutex_unlock(&opp_table->lock); |
1719 | ||
95073b72 | 1720 | if (opp) { |
5b650b38 | 1721 | dev_pm_opp_put(opp); |
0ad8c623 VK |
1722 | |
1723 | /* Drop the reference taken by dev_pm_opp_add() */ | |
1724 | dev_pm_opp_put_opp_table(opp_table); | |
5b650b38 | 1725 | } else { |
129eec55 VK |
1726 | dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n", |
1727 | __func__, freq); | |
129eec55 VK |
1728 | } |
1729 | ||
f123ea74 | 1730 | put_table: |
0ad8c623 | 1731 | /* Drop the reference taken by _find_opp_table() */ |
5b650b38 | 1732 | dev_pm_opp_put_opp_table(opp_table); |
129eec55 VK |
1733 | } |
1734 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove); | |
1735 | ||
cf1fac94 VK |
1736 | static struct dev_pm_opp *_opp_get_next(struct opp_table *opp_table, |
1737 | bool dynamic) | |
1738 | { | |
1739 | struct dev_pm_opp *opp = NULL, *temp; | |
1740 | ||
1741 | mutex_lock(&opp_table->lock); | |
1742 | list_for_each_entry(temp, &opp_table->opp_list, node) { | |
606a5d42 BM |
1743 | /* |
1744 | * Refcount must be dropped only once for each OPP by OPP core, | |
1745 | * do that with help of "removed" flag. | |
1746 | */ | |
1747 | if (!temp->removed && dynamic == temp->dynamic) { | |
cf1fac94 VK |
1748 | opp = temp; |
1749 | break; | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | mutex_unlock(&opp_table->lock); | |
1754 | return opp; | |
1755 | } | |
1756 | ||
606a5d42 BM |
1757 | /* |
1758 | * Can't call dev_pm_opp_put() from under the lock as debugfs removal needs to | |
1759 | * happen lock less to avoid circular dependency issues. This routine must be | |
1760 | * called without the opp_table->lock held. | |
1761 | */ | |
1762 | static void _opp_remove_all(struct opp_table *opp_table, bool dynamic) | |
03758d60 | 1763 | { |
cf1fac94 | 1764 | struct dev_pm_opp *opp; |
03758d60 | 1765 | |
606a5d42 BM |
1766 | while ((opp = _opp_get_next(opp_table, dynamic))) { |
1767 | opp->removed = true; | |
1768 | dev_pm_opp_put(opp); | |
1769 | ||
1770 | /* Drop the references taken by dev_pm_opp_add() */ | |
1771 | if (dynamic) | |
1772 | dev_pm_opp_put_opp_table(opp_table); | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | bool _opp_remove_all_static(struct opp_table *opp_table) | |
1777 | { | |
03758d60 VK |
1778 | mutex_lock(&opp_table->lock); |
1779 | ||
922ff075 | 1780 | if (!opp_table->parsed_static_opps) { |
cf1fac94 VK |
1781 | mutex_unlock(&opp_table->lock); |
1782 | return false; | |
922ff075 VK |
1783 | } |
1784 | ||
cf1fac94 VK |
1785 | if (--opp_table->parsed_static_opps) { |
1786 | mutex_unlock(&opp_table->lock); | |
1787 | return true; | |
03758d60 VK |
1788 | } |
1789 | ||
03758d60 | 1790 | mutex_unlock(&opp_table->lock); |
922ff075 | 1791 | |
606a5d42 | 1792 | _opp_remove_all(opp_table, false); |
cf1fac94 | 1793 | return true; |
03758d60 VK |
1794 | } |
1795 | ||
1690d8bb VK |
1796 | /** |
1797 | * dev_pm_opp_remove_all_dynamic() - Remove all dynamically created OPPs | |
1798 | * @dev: device for which we do this operation | |
1799 | * | |
1800 | * This function removes all dynamically created OPPs from the opp table. | |
1801 | */ | |
1802 | void dev_pm_opp_remove_all_dynamic(struct device *dev) | |
1803 | { | |
1804 | struct opp_table *opp_table; | |
1690d8bb VK |
1805 | |
1806 | opp_table = _find_opp_table(dev); | |
1807 | if (IS_ERR(opp_table)) | |
1808 | return; | |
1809 | ||
606a5d42 | 1810 | _opp_remove_all(opp_table, true); |
1690d8bb VK |
1811 | |
1812 | /* Drop the reference taken by _find_opp_table() */ | |
1813 | dev_pm_opp_put_opp_table(opp_table); | |
1814 | } | |
1815 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic); | |
1816 | ||
d6134583 | 1817 | struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table) |
e1f60b29 | 1818 | { |
23dacf6d | 1819 | struct dev_pm_opp *opp; |
2083da24 | 1820 | int supply_count, supply_size, icc_size, clk_size; |
e1f60b29 | 1821 | |
dfbe4678 | 1822 | /* Allocate space for at least one supply */ |
d6134583 VK |
1823 | supply_count = opp_table->regulator_count > 0 ? |
1824 | opp_table->regulator_count : 1; | |
6d3f922c | 1825 | supply_size = sizeof(*opp->supplies) * supply_count; |
2083da24 | 1826 | clk_size = sizeof(*opp->rates) * opp_table->clk_count; |
d6134583 | 1827 | icc_size = sizeof(*opp->bandwidth) * opp_table->path_count; |
e1f60b29 | 1828 | |
dfbe4678 | 1829 | /* allocate new OPP node and supplies structures */ |
2083da24 | 1830 | opp = kzalloc(sizeof(*opp) + supply_size + clk_size + icc_size, GFP_KERNEL); |
8cd2f6e8 | 1831 | if (!opp) |
23dacf6d | 1832 | return NULL; |
23dacf6d | 1833 | |
2083da24 | 1834 | /* Put the supplies, bw and clock at the end of the OPP structure */ |
dfbe4678 | 1835 | opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); |
2083da24 VK |
1836 | |
1837 | opp->rates = (unsigned long *)(opp->supplies + supply_count); | |
1838 | ||
6d3f922c | 1839 | if (icc_size) |
2083da24 VK |
1840 | opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->rates + opp_table->clk_count); |
1841 | ||
dfbe4678 VK |
1842 | INIT_LIST_HEAD(&opp->node); |
1843 | ||
073d3d2c VK |
1844 | opp->level = OPP_LEVEL_UNSET; |
1845 | ||
23dacf6d VK |
1846 | return opp; |
1847 | } | |
1848 | ||
7d34d56e | 1849 | static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, |
2c2709dc | 1850 | struct opp_table *opp_table) |
7d34d56e | 1851 | { |
dfbe4678 VK |
1852 | struct regulator *reg; |
1853 | int i; | |
1854 | ||
90e3577b VK |
1855 | if (!opp_table->regulators) |
1856 | return true; | |
1857 | ||
dfbe4678 VK |
1858 | for (i = 0; i < opp_table->regulator_count; i++) { |
1859 | reg = opp_table->regulators[i]; | |
1860 | ||
1861 | if (!regulator_is_supported_voltage(reg, | |
1862 | opp->supplies[i].u_volt_min, | |
1863 | opp->supplies[i].u_volt_max)) { | |
1864 | pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", | |
1865 | __func__, opp->supplies[i].u_volt_min, | |
1866 | opp->supplies[i].u_volt_max); | |
1867 | return false; | |
1868 | } | |
7d34d56e VK |
1869 | } |
1870 | ||
1871 | return true; | |
1872 | } | |
1873 | ||
2083da24 VK |
1874 | static int _opp_compare_rate(struct opp_table *opp_table, |
1875 | struct dev_pm_opp *opp1, struct dev_pm_opp *opp2) | |
1876 | { | |
1877 | int i; | |
1878 | ||
1879 | for (i = 0; i < opp_table->clk_count; i++) { | |
1880 | if (opp1->rates[i] != opp2->rates[i]) | |
1881 | return opp1->rates[i] < opp2->rates[i] ? -1 : 1; | |
1882 | } | |
1883 | ||
1884 | /* Same rates for both OPPs */ | |
1885 | return 0; | |
1886 | } | |
1887 | ||
274c3e83 VK |
1888 | static int _opp_compare_bw(struct opp_table *opp_table, struct dev_pm_opp *opp1, |
1889 | struct dev_pm_opp *opp2) | |
1890 | { | |
1891 | int i; | |
1892 | ||
1893 | for (i = 0; i < opp_table->path_count; i++) { | |
1894 | if (opp1->bandwidth[i].peak != opp2->bandwidth[i].peak) | |
1895 | return opp1->bandwidth[i].peak < opp2->bandwidth[i].peak ? -1 : 1; | |
1896 | } | |
1897 | ||
1898 | /* Same bw for both OPPs */ | |
1899 | return 0; | |
1900 | } | |
1901 | ||
8bdac14b VK |
1902 | /* |
1903 | * Returns | |
1904 | * 0: opp1 == opp2 | |
1905 | * 1: opp1 > opp2 | |
1906 | * -1: opp1 < opp2 | |
1907 | */ | |
2083da24 VK |
1908 | int _opp_compare_key(struct opp_table *opp_table, struct dev_pm_opp *opp1, |
1909 | struct dev_pm_opp *opp2) | |
6c591eec | 1910 | { |
2083da24 VK |
1911 | int ret; |
1912 | ||
1913 | ret = _opp_compare_rate(opp_table, opp1, opp2); | |
1914 | if (ret) | |
1915 | return ret; | |
1916 | ||
274c3e83 VK |
1917 | ret = _opp_compare_bw(opp_table, opp1, opp2); |
1918 | if (ret) | |
1919 | return ret; | |
2083da24 | 1920 | |
6c591eec SK |
1921 | if (opp1->level != opp2->level) |
1922 | return opp1->level < opp2->level ? -1 : 1; | |
2083da24 VK |
1923 | |
1924 | /* Duplicate OPPs */ | |
6c591eec SK |
1925 | return 0; |
1926 | } | |
1927 | ||
a1e8c136 VK |
1928 | static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp, |
1929 | struct opp_table *opp_table, | |
1930 | struct list_head **head) | |
23dacf6d VK |
1931 | { |
1932 | struct dev_pm_opp *opp; | |
6c591eec | 1933 | int opp_cmp; |
23dacf6d VK |
1934 | |
1935 | /* | |
1936 | * Insert new OPP in order of increasing frequency and discard if | |
1937 | * already present. | |
1938 | * | |
2c2709dc | 1939 | * Need to use &opp_table->opp_list in the condition part of the 'for' |
23dacf6d VK |
1940 | * loop, don't replace it with head otherwise it will become an infinite |
1941 | * loop. | |
1942 | */ | |
052c6f19 | 1943 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
2083da24 | 1944 | opp_cmp = _opp_compare_key(opp_table, new_opp, opp); |
6c591eec | 1945 | if (opp_cmp > 0) { |
a1e8c136 | 1946 | *head = &opp->node; |
23dacf6d VK |
1947 | continue; |
1948 | } | |
1949 | ||
6c591eec | 1950 | if (opp_cmp < 0) |
a1e8c136 | 1951 | return 0; |
23dacf6d VK |
1952 | |
1953 | /* Duplicate OPPs */ | |
06441658 | 1954 | dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", |
2083da24 VK |
1955 | __func__, opp->rates[0], opp->supplies[0].u_volt, |
1956 | opp->available, new_opp->rates[0], | |
dfbe4678 | 1957 | new_opp->supplies[0].u_volt, new_opp->available); |
23dacf6d | 1958 | |
dfbe4678 | 1959 | /* Should we compare voltages for all regulators here ? */ |
a1e8c136 VK |
1960 | return opp->available && |
1961 | new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST; | |
1962 | } | |
1963 | ||
1964 | return 0; | |
1965 | } | |
1966 | ||
7eba0c76 VK |
1967 | void _required_opps_available(struct dev_pm_opp *opp, int count) |
1968 | { | |
1969 | int i; | |
1970 | ||
1971 | for (i = 0; i < count; i++) { | |
1972 | if (opp->required_opps[i]->available) | |
1973 | continue; | |
1974 | ||
1975 | opp->available = false; | |
1976 | pr_warn("%s: OPP not supported by required OPP %pOF (%lu)\n", | |
2083da24 | 1977 | __func__, opp->required_opps[i]->np, opp->rates[0]); |
7eba0c76 VK |
1978 | return; |
1979 | } | |
1980 | } | |
1981 | ||
a1e8c136 VK |
1982 | /* |
1983 | * Returns: | |
1984 | * 0: On success. And appropriate error message for duplicate OPPs. | |
1985 | * -EBUSY: For OPP with same freq/volt and is available. The callers of | |
1986 | * _opp_add() must return 0 if they receive -EBUSY from it. This is to make | |
1987 | * sure we don't print error messages unnecessarily if different parts of | |
1988 | * kernel try to initialize the OPP table. | |
1989 | * -EEXIST: For OPP with same freq but different volt or is unavailable. This | |
1990 | * should be considered an error by the callers of _opp_add(). | |
1991 | */ | |
1992 | int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, | |
4768914b | 1993 | struct opp_table *opp_table) |
a1e8c136 VK |
1994 | { |
1995 | struct list_head *head; | |
1996 | int ret; | |
1997 | ||
1998 | mutex_lock(&opp_table->lock); | |
1999 | head = &opp_table->opp_list; | |
37a73ec0 | 2000 | |
32715be4 DO |
2001 | ret = _opp_is_duplicate(dev, new_opp, opp_table, &head); |
2002 | if (ret) { | |
2003 | mutex_unlock(&opp_table->lock); | |
2004 | return ret; | |
23dacf6d VK |
2005 | } |
2006 | ||
052c6f19 | 2007 | list_add(&new_opp->node, head); |
37a73ec0 VK |
2008 | mutex_unlock(&opp_table->lock); |
2009 | ||
2010 | new_opp->opp_table = opp_table; | |
7034764a | 2011 | kref_init(&new_opp->kref); |
23dacf6d | 2012 | |
a2dea4cb | 2013 | opp_debug_create_one(new_opp, opp_table); |
deaa5146 | 2014 | |
2c2709dc | 2015 | if (!_opp_supported_by_regulators(new_opp, opp_table)) { |
7d34d56e VK |
2016 | new_opp->available = false; |
2017 | dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n", | |
2083da24 | 2018 | __func__, new_opp->rates[0]); |
7d34d56e VK |
2019 | } |
2020 | ||
7eba0c76 VK |
2021 | /* required-opps not fully initialized yet */ |
2022 | if (lazy_linking_pending(opp_table)) | |
2023 | return 0; | |
cf65948d | 2024 | |
7eba0c76 | 2025 | _required_opps_available(new_opp, opp_table->required_opp_count); |
cf65948d | 2026 | |
23dacf6d VK |
2027 | return 0; |
2028 | } | |
2029 | ||
984f16c8 | 2030 | /** |
b64b9c3f | 2031 | * _opp_add_v1() - Allocate a OPP based on v1 bindings. |
8cd2f6e8 | 2032 | * @opp_table: OPP table |
984f16c8 | 2033 | * @dev: device for which we do this operation |
248a38d5 | 2034 | * @data: The OPP data for the OPP to add |
984f16c8 NM |
2035 | * @dynamic: Dynamically added OPPs. |
2036 | * | |
2c2709dc | 2037 | * This function adds an opp definition to the opp table and returns status. |
984f16c8 NM |
2038 | * The opp is made available by default and it can be controlled using |
2039 | * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove. | |
2040 | * | |
8f8d37b2 VK |
2041 | * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table |
2042 | * and freed by dev_pm_opp_of_remove_table. | |
984f16c8 | 2043 | * |
984f16c8 NM |
2044 | * Return: |
2045 | * 0 On success OR | |
2046 | * Duplicate OPPs (both freq and volt are same) and opp->available | |
2047 | * -EEXIST Freq are same and volt are different OR | |
2048 | * Duplicate OPPs (both freq and volt are same) and !opp->available | |
2049 | * -ENOMEM Memory allocation failure | |
2050 | */ | |
8cd2f6e8 | 2051 | int _opp_add_v1(struct opp_table *opp_table, struct device *dev, |
248a38d5 | 2052 | struct dev_pm_opp_data *data, bool dynamic) |
e1f60b29 | 2053 | { |
23dacf6d | 2054 | struct dev_pm_opp *new_opp; |
248a38d5 | 2055 | unsigned long tol, u_volt = data->u_volt; |
6ce4184d | 2056 | int ret; |
e1f60b29 | 2057 | |
f123ea74 VK |
2058 | if (!assert_single_clk(opp_table)) |
2059 | return -EINVAL; | |
2060 | ||
8cd2f6e8 VK |
2061 | new_opp = _opp_allocate(opp_table); |
2062 | if (!new_opp) | |
2063 | return -ENOMEM; | |
23dacf6d | 2064 | |
a7470db6 | 2065 | /* populate the opp table */ |
248a38d5 | 2066 | new_opp->rates[0] = data->freq; |
3166383d | 2067 | new_opp->level = data->level; |
abb3f971 | 2068 | new_opp->turbo = data->turbo; |
2c2709dc | 2069 | tol = u_volt * opp_table->voltage_tolerance_v1 / 100; |
dfbe4678 VK |
2070 | new_opp->supplies[0].u_volt = u_volt; |
2071 | new_opp->supplies[0].u_volt_min = u_volt - tol; | |
2072 | new_opp->supplies[0].u_volt_max = u_volt + tol; | |
a7470db6 | 2073 | new_opp->available = true; |
23dacf6d | 2074 | new_opp->dynamic = dynamic; |
a7470db6 | 2075 | |
4768914b | 2076 | ret = _opp_add(dev, new_opp, opp_table); |
7f8538eb VK |
2077 | if (ret) { |
2078 | /* Don't return error for duplicate OPPs */ | |
2079 | if (ret == -EBUSY) | |
2080 | ret = 0; | |
6ce4184d | 2081 | goto free_opp; |
7f8538eb | 2082 | } |
64ce8545 | 2083 | |
03ca370f MH |
2084 | /* |
2085 | * Notify the changes in the availability of the operable | |
2086 | * frequency/voltage list. | |
2087 | */ | |
052c6f19 | 2088 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); |
e1f60b29 | 2089 | return 0; |
6ce4184d VK |
2090 | |
2091 | free_opp: | |
8cd2f6e8 VK |
2092 | _opp_free(new_opp); |
2093 | ||
6ce4184d | 2094 | return ret; |
e1f60b29 | 2095 | } |
38393409 | 2096 | |
cca14de5 | 2097 | /* |
7de36b0a VK |
2098 | * This is required only for the V2 bindings, and it enables a platform to |
2099 | * specify the hierarchy of versions it supports. OPP layer will then enable | |
2100 | * OPPs, which are available for those versions, based on its 'opp-supported-hw' | |
2101 | * property. | |
7de36b0a | 2102 | */ |
89f03984 VK |
2103 | static int _opp_set_supported_hw(struct opp_table *opp_table, |
2104 | const u32 *versions, unsigned int count) | |
7de36b0a | 2105 | { |
25419de1 VK |
2106 | /* Another CPU that shares the OPP table has set the property ? */ |
2107 | if (opp_table->supported_hw) | |
89f03984 | 2108 | return 0; |
7de36b0a | 2109 | |
2c2709dc | 2110 | opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions), |
7de36b0a | 2111 | GFP_KERNEL); |
89f03984 VK |
2112 | if (!opp_table->supported_hw) |
2113 | return -ENOMEM; | |
7de36b0a | 2114 | |
2c2709dc | 2115 | opp_table->supported_hw_count = count; |
fa30184d | 2116 | |
89f03984 | 2117 | return 0; |
7de36b0a | 2118 | } |
7de36b0a | 2119 | |
89f03984 | 2120 | static void _opp_put_supported_hw(struct opp_table *opp_table) |
7de36b0a | 2121 | { |
89f03984 VK |
2122 | if (opp_table->supported_hw) { |
2123 | kfree(opp_table->supported_hw); | |
2124 | opp_table->supported_hw = NULL; | |
2125 | opp_table->supported_hw_count = 0; | |
2126 | } | |
9c4f220f | 2127 | } |
9c4f220f | 2128 | |
cca14de5 | 2129 | /* |
01fb4d3c VK |
2130 | * This is required only for the V2 bindings, and it enables a platform to |
2131 | * specify the extn to be used for certain property names. The properties to | |
2132 | * which the extension will apply are opp-microvolt and opp-microamp. OPP core | |
2133 | * should postfix the property name with -<name> while looking for them. | |
01fb4d3c | 2134 | */ |
298098e5 | 2135 | static int _opp_set_prop_name(struct opp_table *opp_table, const char *name) |
01fb4d3c | 2136 | { |
878ec1a9 | 2137 | /* Another CPU that shares the OPP table has set the property ? */ |
2c2709dc | 2138 | if (!opp_table->prop_name) { |
298098e5 VK |
2139 | opp_table->prop_name = kstrdup(name, GFP_KERNEL); |
2140 | if (!opp_table->prop_name) | |
2141 | return -ENOMEM; | |
01fb4d3c VK |
2142 | } |
2143 | ||
298098e5 | 2144 | return 0; |
01fb4d3c | 2145 | } |
01fb4d3c | 2146 | |
298098e5 | 2147 | static void _opp_put_prop_name(struct opp_table *opp_table) |
01fb4d3c | 2148 | { |
298098e5 VK |
2149 | if (opp_table->prop_name) { |
2150 | kfree(opp_table->prop_name); | |
2151 | opp_table->prop_name = NULL; | |
2152 | } | |
01fb4d3c | 2153 | } |
01fb4d3c | 2154 | |
cca14de5 | 2155 | /* |
9f8ea969 | 2156 | * In order to support OPP switching, OPP layer needs to know the name of the |
dfbe4678 VK |
2157 | * device's regulators, as the core would be required to switch voltages as |
2158 | * well. | |
9f8ea969 VK |
2159 | * |
2160 | * This must be called before any OPPs are initialized for the device. | |
9f8ea969 | 2161 | */ |
b0ec0942 VK |
2162 | static int _opp_set_regulators(struct opp_table *opp_table, struct device *dev, |
2163 | const char * const names[]) | |
9f8ea969 | 2164 | { |
87686cc8 | 2165 | const char * const *temp = names; |
9f8ea969 | 2166 | struct regulator *reg; |
87686cc8 VK |
2167 | int count = 0, ret, i; |
2168 | ||
2169 | /* Count number of regulators */ | |
2170 | while (*temp++) | |
2171 | count++; | |
2172 | ||
2173 | if (!count) | |
b0ec0942 | 2174 | return -EINVAL; |
9f8ea969 | 2175 | |
779b783c VK |
2176 | /* Another CPU that shares the OPP table has set the regulators ? */ |
2177 | if (opp_table->regulators) | |
b0ec0942 | 2178 | return 0; |
dfbe4678 VK |
2179 | |
2180 | opp_table->regulators = kmalloc_array(count, | |
2181 | sizeof(*opp_table->regulators), | |
2182 | GFP_KERNEL); | |
b0ec0942 VK |
2183 | if (!opp_table->regulators) |
2184 | return -ENOMEM; | |
9f8ea969 | 2185 | |
dfbe4678 VK |
2186 | for (i = 0; i < count; i++) { |
2187 | reg = regulator_get_optional(dev, names[i]); | |
2188 | if (IS_ERR(reg)) { | |
543256d2 KK |
2189 | ret = dev_err_probe(dev, PTR_ERR(reg), |
2190 | "%s: no regulator (%s) found\n", | |
2191 | __func__, names[i]); | |
dfbe4678 VK |
2192 | goto free_regulators; |
2193 | } | |
2194 | ||
2195 | opp_table->regulators[i] = reg; | |
2196 | } | |
2197 | ||
2198 | opp_table->regulator_count = count; | |
9f8ea969 | 2199 | |
c522ce8a VK |
2200 | /* Set generic config_regulators() for single regulators here */ |
2201 | if (count == 1) | |
2202 | opp_table->config_regulators = _opp_config_regulator_single; | |
2203 | ||
b0ec0942 | 2204 | return 0; |
9f8ea969 | 2205 | |
dfbe4678 | 2206 | free_regulators: |
24957db1 MS |
2207 | while (i != 0) |
2208 | regulator_put(opp_table->regulators[--i]); | |
dfbe4678 VK |
2209 | |
2210 | kfree(opp_table->regulators); | |
2211 | opp_table->regulators = NULL; | |
46f48aca | 2212 | opp_table->regulator_count = -1; |
9f8ea969 | 2213 | |
b0ec0942 | 2214 | return ret; |
9f8ea969 | 2215 | } |
9f8ea969 | 2216 | |
b0ec0942 | 2217 | static void _opp_put_regulators(struct opp_table *opp_table) |
9f8ea969 | 2218 | { |
dfbe4678 VK |
2219 | int i; |
2220 | ||
779b783c | 2221 | if (!opp_table->regulators) |
b0ec0942 | 2222 | return; |
9f8ea969 | 2223 | |
72f80ce4 | 2224 | if (opp_table->enabled) { |
8d45719c KK |
2225 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
2226 | regulator_disable(opp_table->regulators[i]); | |
8d45719c KK |
2227 | } |
2228 | ||
24957db1 | 2229 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
dfbe4678 VK |
2230 | regulator_put(opp_table->regulators[i]); |
2231 | ||
2232 | kfree(opp_table->regulators); | |
2233 | opp_table->regulators = NULL; | |
46f48aca | 2234 | opp_table->regulator_count = -1; |
32aee78b | 2235 | } |
32aee78b | 2236 | |
2083da24 VK |
2237 | static void _put_clks(struct opp_table *opp_table, int count) |
2238 | { | |
2239 | int i; | |
2240 | ||
2241 | for (i = count - 1; i >= 0; i--) | |
2242 | clk_put(opp_table->clks[i]); | |
2243 | ||
2244 | kfree(opp_table->clks); | |
2245 | opp_table->clks = NULL; | |
2246 | } | |
2247 | ||
cca14de5 | 2248 | /* |
2368f576 VK |
2249 | * In order to support OPP switching, OPP layer needs to get pointers to the |
2250 | * clocks for the device. Simple cases work fine without using this routine | |
2251 | * (i.e. by passing connection-id as NULL), but for a device with multiple | |
2252 | * clocks available, the OPP core needs to know the exact names of the clks to | |
2253 | * use. | |
829a4e8c VK |
2254 | * |
2255 | * This must be called before any OPPs are initialized for the device. | |
2256 | */ | |
2368f576 | 2257 | static int _opp_set_clknames(struct opp_table *opp_table, struct device *dev, |
2083da24 VK |
2258 | const char * const names[], |
2259 | config_clks_t config_clks) | |
829a4e8c | 2260 | { |
2368f576 | 2261 | const char * const *temp = names; |
2083da24 VK |
2262 | int count = 0, ret, i; |
2263 | struct clk *clk; | |
829a4e8c | 2264 | |
2368f576 VK |
2265 | /* Count number of clks */ |
2266 | while (*temp++) | |
2267 | count++; | |
829a4e8c | 2268 | |
2368f576 VK |
2269 | /* |
2270 | * This is a special case where we have a single clock, whose connection | |
2271 | * id name is NULL, i.e. first two entries are NULL in the array. | |
2272 | */ | |
2273 | if (!count && !names[1]) | |
2274 | count = 1; | |
2275 | ||
2083da24 | 2276 | /* Fail early for invalid configurations */ |
2f71ae1a | 2277 | if (!count || (!config_clks && count > 1)) |
2368f576 | 2278 | return -EINVAL; |
829a4e8c | 2279 | |
0a43452b | 2280 | /* Another CPU that shares the OPP table has set the clkname ? */ |
2083da24 | 2281 | if (opp_table->clks) |
2368f576 | 2282 | return 0; |
0a43452b | 2283 | |
2083da24 VK |
2284 | opp_table->clks = kmalloc_array(count, sizeof(*opp_table->clks), |
2285 | GFP_KERNEL); | |
2286 | if (!opp_table->clks) | |
2287 | return -ENOMEM; | |
829a4e8c | 2288 | |
2083da24 VK |
2289 | /* Find clks for the device */ |
2290 | for (i = 0; i < count; i++) { | |
2291 | clk = clk_get(dev, names[i]); | |
2292 | if (IS_ERR(clk)) { | |
2293 | ret = dev_err_probe(dev, PTR_ERR(clk), | |
2294 | "%s: Couldn't find clock with name: %s\n", | |
2295 | __func__, names[i]); | |
2296 | goto free_clks; | |
2297 | } | |
2298 | ||
2299 | opp_table->clks[i] = clk; | |
829a4e8c VK |
2300 | } |
2301 | ||
2083da24 | 2302 | opp_table->clk_count = count; |
2f71ae1a | 2303 | opp_table->config_clks = config_clks; |
2083da24 VK |
2304 | |
2305 | /* Set generic single clk set here */ | |
2306 | if (count == 1) { | |
2f71ae1a VK |
2307 | if (!opp_table->config_clks) |
2308 | opp_table->config_clks = _opp_config_clk_single; | |
2083da24 VK |
2309 | |
2310 | /* | |
2311 | * We could have just dropped the "clk" field and used "clks" | |
2312 | * everywhere. Instead we kept the "clk" field around for | |
2313 | * following reasons: | |
2314 | * | |
2315 | * - avoiding clks[0] everywhere else. | |
2316 | * - not running single clk helpers for multiple clk usecase by | |
2317 | * mistake. | |
2318 | * | |
2319 | * Since this is single-clk case, just update the clk pointer | |
2320 | * too. | |
2321 | */ | |
2322 | opp_table->clk = opp_table->clks[0]; | |
2083da24 | 2323 | } |
0a43452b | 2324 | |
2368f576 | 2325 | return 0; |
2083da24 VK |
2326 | |
2327 | free_clks: | |
2328 | _put_clks(opp_table, i); | |
2329 | return ret; | |
a74f681c YL |
2330 | } |
2331 | ||
2368f576 | 2332 | static void _opp_put_clknames(struct opp_table *opp_table) |
a74f681c | 2333 | { |
2083da24 VK |
2334 | if (!opp_table->clks) |
2335 | return; | |
2336 | ||
2337 | opp_table->config_clks = NULL; | |
2338 | opp_table->clk = ERR_PTR(-ENODEV); | |
2339 | ||
2340 | _put_clks(opp_table, opp_table->clk_count); | |
a74f681c | 2341 | } |
a74f681c | 2342 | |
cca14de5 | 2343 | /* |
aee3352f VK |
2344 | * This is useful to support platforms with multiple regulators per device. |
2345 | * | |
2346 | * This must be called before any OPPs are initialized for the device. | |
2347 | */ | |
2348 | static int _opp_set_config_regulators_helper(struct opp_table *opp_table, | |
2349 | struct device *dev, config_regulators_t config_regulators) | |
2350 | { | |
2351 | /* Another CPU that shares the OPP table has set the helper ? */ | |
2352 | if (!opp_table->config_regulators) | |
2353 | opp_table->config_regulators = config_regulators; | |
2354 | ||
2355 | return 0; | |
2356 | } | |
2357 | ||
aee3352f VK |
2358 | static void _opp_put_config_regulators_helper(struct opp_table *opp_table) |
2359 | { | |
2360 | if (opp_table->config_regulators) | |
2361 | opp_table->config_regulators = NULL; | |
2362 | } | |
2363 | ||
48b5aaec | 2364 | static void _opp_detach_genpd(struct opp_table *opp_table) |
6319aee1 VK |
2365 | { |
2366 | int index; | |
2367 | ||
2368 | for (index = 0; index < opp_table->required_opp_count; index++) { | |
e37440e7 | 2369 | if (!opp_table->required_devs[index]) |
6319aee1 VK |
2370 | continue; |
2371 | ||
e37440e7 VK |
2372 | dev_pm_domain_detach(opp_table->required_devs[index], false); |
2373 | opp_table->required_devs[index] = NULL; | |
6319aee1 VK |
2374 | } |
2375 | } | |
2376 | ||
cca14de5 | 2377 | /* |
4f018bc0 VK |
2378 | * Multiple generic power domains for a device are supported with the help of |
2379 | * virtual genpd devices, which are created for each consumer device - genpd | |
2380 | * pair. These are the device structures which are attached to the power domain | |
2381 | * and are required by the OPP core to set the performance state of the genpd. | |
6319aee1 VK |
2382 | * The same API also works for the case where single genpd is available and so |
2383 | * we don't need to support that separately. | |
4f018bc0 VK |
2384 | * |
2385 | * This helper will normally be called by the consumer driver of the device | |
6319aee1 | 2386 | * "dev", as only that has details of the genpd names. |
4f018bc0 | 2387 | * |
6319aee1 VK |
2388 | * This helper needs to be called once with a list of all genpd to attach. |
2389 | * Otherwise the original device structure will be used instead by the OPP core. | |
baea35e4 VK |
2390 | * |
2391 | * The order of entries in the names array must match the order in which | |
2392 | * "required-opps" are added in DT. | |
4f018bc0 | 2393 | */ |
442e7a17 VK |
2394 | static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev, |
2395 | const char * const *names, struct device ***virt_devs) | |
4f018bc0 | 2396 | { |
6319aee1 | 2397 | struct device *virt_dev; |
baea35e4 | 2398 | int index = 0, ret = -EINVAL; |
3734b9f2 | 2399 | const char * const *name = names; |
4f018bc0 | 2400 | |
e37440e7 VK |
2401 | if (!opp_table->required_devs) { |
2402 | dev_err(dev, "Required OPPs not available, can't attach genpd\n"); | |
2403 | return -EINVAL; | |
2404 | } | |
4f018bc0 | 2405 | |
92514143 VK |
2406 | /* Genpd core takes care of propagation to parent genpd */ |
2407 | if (opp_table->is_genpd) { | |
2408 | dev_err(dev, "%s: Operation not supported for genpds\n", __func__); | |
2409 | return -EOPNOTSUPP; | |
2410 | } | |
2411 | ||
e37440e7 VK |
2412 | /* Checking only the first one is enough ? */ |
2413 | if (opp_table->required_devs[0]) | |
2414 | return 0; | |
4f018bc0 | 2415 | |
6319aee1 | 2416 | while (*name) { |
6319aee1 VK |
2417 | if (index >= opp_table->required_opp_count) { |
2418 | dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n", | |
2419 | *name, opp_table->required_opp_count, index); | |
2420 | goto err; | |
2421 | } | |
4f018bc0 | 2422 | |
6319aee1 | 2423 | virt_dev = dev_pm_domain_attach_by_name(dev, *name); |
4ea9496c | 2424 | if (IS_ERR_OR_NULL(virt_dev)) { |
d920920f | 2425 | ret = virt_dev ? PTR_ERR(virt_dev) : -ENODEV; |
6319aee1 VK |
2426 | dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret); |
2427 | goto err; | |
2428 | } | |
2429 | ||
e37440e7 VK |
2430 | /* |
2431 | * Add the virtual genpd device as a user of the OPP table, so | |
2432 | * we can call dev_pm_opp_set_opp() on it directly. | |
2433 | * | |
2434 | * This will be automatically removed when the OPP table is | |
2435 | * removed, don't need to handle that here. | |
2436 | */ | |
2437 | if (!_add_opp_dev(virt_dev, opp_table->required_opp_tables[index])) { | |
2438 | ret = -ENOMEM; | |
2439 | goto err; | |
2440 | } | |
2441 | ||
2442 | opp_table->required_devs[index] = virt_dev; | |
baea35e4 | 2443 | index++; |
6319aee1 | 2444 | name++; |
4f018bc0 VK |
2445 | } |
2446 | ||
17a8f868 | 2447 | if (virt_devs) |
e37440e7 | 2448 | *virt_devs = opp_table->required_devs; |
4f018bc0 | 2449 | |
442e7a17 | 2450 | return 0; |
6319aee1 VK |
2451 | |
2452 | err: | |
48b5aaec | 2453 | _opp_detach_genpd(opp_table); |
442e7a17 | 2454 | return ret; |
6319aee1 | 2455 | |
4f018bc0 VK |
2456 | } |
2457 | ||
e37440e7 VK |
2458 | static int _opp_set_required_devs(struct opp_table *opp_table, |
2459 | struct device *dev, | |
2460 | struct device **required_devs) | |
2461 | { | |
2462 | int i; | |
2463 | ||
2464 | if (!opp_table->required_devs) { | |
2465 | dev_err(dev, "Required OPPs not available, can't set required devs\n"); | |
2466 | return -EINVAL; | |
2467 | } | |
2468 | ||
2469 | /* Another device that shares the OPP table has set the required devs ? */ | |
2470 | if (opp_table->required_devs[0]) | |
2471 | return 0; | |
2472 | ||
92514143 VK |
2473 | for (i = 0; i < opp_table->required_opp_count; i++) { |
2474 | /* Genpd core takes care of propagation to parent genpd */ | |
2475 | if (required_devs[i] && opp_table->is_genpd && | |
2476 | opp_table->required_opp_tables[i]->is_genpd) { | |
2477 | dev_err(dev, "%s: Operation not supported for genpds\n", __func__); | |
2478 | return -EOPNOTSUPP; | |
2479 | } | |
2480 | ||
e37440e7 | 2481 | opp_table->required_devs[i] = required_devs[i]; |
92514143 | 2482 | } |
e37440e7 VK |
2483 | |
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | static void _opp_put_required_devs(struct opp_table *opp_table) | |
2488 | { | |
2489 | int i; | |
2490 | ||
2491 | for (i = 0; i < opp_table->required_opp_count; i++) | |
2492 | opp_table->required_devs[i] = NULL; | |
2493 | } | |
2494 | ||
11b9b663 VK |
2495 | static void _opp_clear_config(struct opp_config_data *data) |
2496 | { | |
e37440e7 VK |
2497 | if (data->flags & OPP_CONFIG_REQUIRED_DEVS) |
2498 | _opp_put_required_devs(data->opp_table); | |
2499 | else if (data->flags & OPP_CONFIG_GENPD) | |
442e7a17 | 2500 | _opp_detach_genpd(data->opp_table); |
e37440e7 | 2501 | |
11b9b663 | 2502 | if (data->flags & OPP_CONFIG_REGULATOR) |
b0ec0942 | 2503 | _opp_put_regulators(data->opp_table); |
11b9b663 | 2504 | if (data->flags & OPP_CONFIG_SUPPORTED_HW) |
89f03984 | 2505 | _opp_put_supported_hw(data->opp_table); |
1f378c6e | 2506 | if (data->flags & OPP_CONFIG_REGULATOR_HELPER) |
aee3352f | 2507 | _opp_put_config_regulators_helper(data->opp_table); |
11b9b663 | 2508 | if (data->flags & OPP_CONFIG_PROP_NAME) |
298098e5 | 2509 | _opp_put_prop_name(data->opp_table); |
11b9b663 | 2510 | if (data->flags & OPP_CONFIG_CLK) |
2368f576 | 2511 | _opp_put_clknames(data->opp_table); |
11b9b663 VK |
2512 | |
2513 | dev_pm_opp_put_opp_table(data->opp_table); | |
2514 | kfree(data); | |
2515 | } | |
2516 | ||
2517 | /** | |
2518 | * dev_pm_opp_set_config() - Set OPP configuration for the device. | |
2519 | * @dev: Device for which configuration is being set. | |
2520 | * @config: OPP configuration. | |
2521 | * | |
2522 | * This allows all device OPP configurations to be performed at once. | |
2523 | * | |
2524 | * This must be called before any OPPs are initialized for the device. This may | |
2525 | * be called multiple times for the same OPP table, for example once for each | |
2526 | * CPU that share the same table. This must be balanced by the same number of | |
2527 | * calls to dev_pm_opp_clear_config() in order to free the OPP table properly. | |
2528 | * | |
2529 | * This returns a token to the caller, which must be passed to | |
2530 | * dev_pm_opp_clear_config() to free the resources later. The value of the | |
2531 | * returned token will be >= 1 for success and negative for errors. The minimum | |
2532 | * value of 1 is chosen here to make it easy for callers to manage the resource. | |
2533 | */ | |
2534 | int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config) | |
2535 | { | |
298098e5 | 2536 | struct opp_table *opp_table; |
11b9b663 VK |
2537 | struct opp_config_data *data; |
2538 | unsigned int id; | |
2539 | int ret; | |
2540 | ||
2541 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
2542 | if (!data) | |
2543 | return -ENOMEM; | |
2544 | ||
2545 | opp_table = _add_opp_table(dev, false); | |
2546 | if (IS_ERR(opp_table)) { | |
2547 | kfree(data); | |
2548 | return PTR_ERR(opp_table); | |
2549 | } | |
2550 | ||
2551 | data->opp_table = opp_table; | |
2552 | data->flags = 0; | |
2553 | ||
2554 | /* This should be called before OPPs are initialized */ | |
2555 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { | |
2556 | ret = -EBUSY; | |
2557 | goto err; | |
2558 | } | |
2559 | ||
2560 | /* Configure clocks */ | |
2561 | if (config->clk_names) { | |
2083da24 VK |
2562 | ret = _opp_set_clknames(opp_table, dev, config->clk_names, |
2563 | config->config_clks); | |
2368f576 | 2564 | if (ret) |
11b9b663 | 2565 | goto err; |
11b9b663 VK |
2566 | |
2567 | data->flags |= OPP_CONFIG_CLK; | |
2083da24 VK |
2568 | } else if (config->config_clks) { |
2569 | /* Don't allow config callback without clocks */ | |
2570 | ret = -EINVAL; | |
2571 | goto err; | |
11b9b663 VK |
2572 | } |
2573 | ||
2574 | /* Configure property names */ | |
2575 | if (config->prop_name) { | |
298098e5 VK |
2576 | ret = _opp_set_prop_name(opp_table, config->prop_name); |
2577 | if (ret) | |
11b9b663 | 2578 | goto err; |
11b9b663 VK |
2579 | |
2580 | data->flags |= OPP_CONFIG_PROP_NAME; | |
2581 | } | |
2582 | ||
aee3352f VK |
2583 | /* Configure config_regulators helper */ |
2584 | if (config->config_regulators) { | |
2585 | ret = _opp_set_config_regulators_helper(opp_table, dev, | |
2586 | config->config_regulators); | |
2587 | if (ret) | |
2588 | goto err; | |
2589 | ||
2590 | data->flags |= OPP_CONFIG_REGULATOR_HELPER; | |
2591 | } | |
2592 | ||
11b9b663 VK |
2593 | /* Configure supported hardware */ |
2594 | if (config->supported_hw) { | |
89f03984 VK |
2595 | ret = _opp_set_supported_hw(opp_table, config->supported_hw, |
2596 | config->supported_hw_count); | |
2597 | if (ret) | |
11b9b663 | 2598 | goto err; |
11b9b663 VK |
2599 | |
2600 | data->flags |= OPP_CONFIG_SUPPORTED_HW; | |
2601 | } | |
2602 | ||
2603 | /* Configure supplies */ | |
2604 | if (config->regulator_names) { | |
b0ec0942 VK |
2605 | ret = _opp_set_regulators(opp_table, dev, |
2606 | config->regulator_names); | |
2607 | if (ret) | |
11b9b663 | 2608 | goto err; |
11b9b663 VK |
2609 | |
2610 | data->flags |= OPP_CONFIG_REGULATOR; | |
2611 | } | |
2612 | ||
2613 | /* Attach genpds */ | |
2614 | if (config->genpd_names) { | |
e37440e7 VK |
2615 | if (config->required_devs) |
2616 | goto err; | |
2617 | ||
442e7a17 VK |
2618 | ret = _opp_attach_genpd(opp_table, dev, config->genpd_names, |
2619 | config->virt_devs); | |
2620 | if (ret) | |
11b9b663 | 2621 | goto err; |
11b9b663 VK |
2622 | |
2623 | data->flags |= OPP_CONFIG_GENPD; | |
e37440e7 VK |
2624 | } else if (config->required_devs) { |
2625 | ret = _opp_set_required_devs(opp_table, dev, | |
2626 | config->required_devs); | |
2627 | if (ret) | |
2628 | goto err; | |
2629 | ||
2630 | data->flags |= OPP_CONFIG_REQUIRED_DEVS; | |
11b9b663 VK |
2631 | } |
2632 | ||
2633 | ret = xa_alloc(&opp_configs, &id, data, XA_LIMIT(1, INT_MAX), | |
2634 | GFP_KERNEL); | |
2635 | if (ret) | |
2636 | goto err; | |
2637 | ||
2638 | return id; | |
2639 | ||
2640 | err: | |
2641 | _opp_clear_config(data); | |
2642 | return ret; | |
2643 | } | |
2644 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_config); | |
2645 | ||
2646 | /** | |
2647 | * dev_pm_opp_clear_config() - Releases resources blocked for OPP configuration. | |
cca14de5 | 2648 | * @token: The token returned by dev_pm_opp_set_config() previously. |
11b9b663 VK |
2649 | * |
2650 | * This allows all device OPP configurations to be cleared at once. This must be | |
2651 | * called once for each call made to dev_pm_opp_set_config(), in order to free | |
2652 | * the OPPs properly. | |
2653 | * | |
2654 | * Currently the first call itself ends up freeing all the OPP configurations, | |
2655 | * while the later ones only drop the OPP table reference. This works well for | |
2656 | * now as we would never want to use an half initialized OPP table and want to | |
2657 | * remove the configurations together. | |
2658 | */ | |
2659 | void dev_pm_opp_clear_config(int token) | |
2660 | { | |
2661 | struct opp_config_data *data; | |
2662 | ||
2663 | /* | |
2664 | * This lets the callers call this unconditionally and keep their code | |
2665 | * simple. | |
2666 | */ | |
2667 | if (unlikely(token <= 0)) | |
2668 | return; | |
2669 | ||
2670 | data = xa_erase(&opp_configs, token); | |
2671 | if (WARN_ON(!data)) | |
2672 | return; | |
2673 | ||
2674 | _opp_clear_config(data); | |
2675 | } | |
2676 | EXPORT_SYMBOL_GPL(dev_pm_opp_clear_config); | |
2677 | ||
2678 | static void devm_pm_opp_config_release(void *token) | |
2679 | { | |
2680 | dev_pm_opp_clear_config((unsigned long)token); | |
2681 | } | |
2682 | ||
2683 | /** | |
2684 | * devm_pm_opp_set_config() - Set OPP configuration for the device. | |
2685 | * @dev: Device for which configuration is being set. | |
2686 | * @config: OPP configuration. | |
2687 | * | |
2688 | * This allows all device OPP configurations to be performed at once. | |
2689 | * This is a resource-managed variant of dev_pm_opp_set_config(). | |
2690 | * | |
2691 | * Return: 0 on success and errorno otherwise. | |
2692 | */ | |
2693 | int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config) | |
2694 | { | |
2695 | int token = dev_pm_opp_set_config(dev, config); | |
2696 | ||
2697 | if (token < 0) | |
2698 | return token; | |
2699 | ||
2700 | return devm_add_action_or_reset(dev, devm_pm_opp_config_release, | |
2701 | (void *) ((unsigned long) token)); | |
2702 | } | |
2703 | EXPORT_SYMBOL_GPL(devm_pm_opp_set_config); | |
2704 | ||
7d8658ef SK |
2705 | /** |
2706 | * dev_pm_opp_xlate_required_opp() - Find required OPP for @src_table OPP. | |
2707 | * @src_table: OPP table which has @dst_table as one of its required OPP table. | |
2708 | * @dst_table: Required OPP table of the @src_table. | |
2709 | * @src_opp: OPP from the @src_table. | |
2710 | * | |
2711 | * This function returns the OPP (present in @dst_table) pointed out by the | |
2712 | * "required-opps" property of the @src_opp (present in @src_table). | |
2713 | * | |
2714 | * The callers are required to call dev_pm_opp_put() for the returned OPP after | |
2715 | * use. | |
2716 | * | |
2717 | * Return: pointer to 'struct dev_pm_opp' on success and errorno otherwise. | |
2718 | */ | |
2719 | struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, | |
2720 | struct opp_table *dst_table, | |
2721 | struct dev_pm_opp *src_opp) | |
2722 | { | |
2723 | struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-ENODEV); | |
2724 | int i; | |
2725 | ||
2726 | if (!src_table || !dst_table || !src_opp || | |
2727 | !src_table->required_opp_tables) | |
2728 | return ERR_PTR(-EINVAL); | |
2729 | ||
2730 | /* required-opps not fully initialized yet */ | |
2731 | if (lazy_linking_pending(src_table)) | |
2732 | return ERR_PTR(-EBUSY); | |
2733 | ||
2734 | for (i = 0; i < src_table->required_opp_count; i++) { | |
2735 | if (src_table->required_opp_tables[i] == dst_table) { | |
2736 | mutex_lock(&src_table->lock); | |
2737 | ||
2738 | list_for_each_entry(opp, &src_table->opp_list, node) { | |
2739 | if (opp == src_opp) { | |
2740 | dest_opp = opp->required_opps[i]; | |
2741 | dev_pm_opp_get(dest_opp); | |
2742 | break; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | mutex_unlock(&src_table->lock); | |
2747 | break; | |
2748 | } | |
2749 | } | |
2750 | ||
2751 | if (IS_ERR(dest_opp)) { | |
2752 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, | |
2753 | src_table, dst_table); | |
2754 | } | |
2755 | ||
2756 | return dest_opp; | |
2757 | } | |
2758 | EXPORT_SYMBOL_GPL(dev_pm_opp_xlate_required_opp); | |
2759 | ||
c8a59103 VK |
2760 | /** |
2761 | * dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table. | |
2762 | * @src_table: OPP table which has dst_table as one of its required OPP table. | |
2763 | * @dst_table: Required OPP table of the src_table. | |
2764 | * @pstate: Current performance state of the src_table. | |
2765 | * | |
2766 | * This Returns pstate of the OPP (present in @dst_table) pointed out by the | |
2767 | * "required-opps" property of the OPP (present in @src_table) which has | |
2768 | * performance state set to @pstate. | |
2769 | * | |
2770 | * Return: Zero or positive performance state on success, otherwise negative | |
2771 | * value on errors. | |
2772 | */ | |
2773 | int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, | |
2774 | struct opp_table *dst_table, | |
2775 | unsigned int pstate) | |
2776 | { | |
2777 | struct dev_pm_opp *opp; | |
2778 | int dest_pstate = -EINVAL; | |
2779 | int i; | |
2780 | ||
c8a59103 VK |
2781 | /* |
2782 | * Normally the src_table will have the "required_opps" property set to | |
2783 | * point to one of the OPPs in the dst_table, but in some cases the | |
2784 | * genpd and its master have one to one mapping of performance states | |
2785 | * and so none of them have the "required-opps" property set. Return the | |
2786 | * pstate of the src_table as it is in such cases. | |
2787 | */ | |
f2f4d2b8 | 2788 | if (!src_table || !src_table->required_opp_count) |
c8a59103 VK |
2789 | return pstate; |
2790 | ||
84cb7ff3 VK |
2791 | /* Both OPP tables must belong to genpds */ |
2792 | if (unlikely(!src_table->is_genpd || !dst_table->is_genpd)) { | |
2793 | pr_err("%s: Performance state is only valid for genpds.\n", __func__); | |
2794 | return -EINVAL; | |
2795 | } | |
2796 | ||
7eba0c76 VK |
2797 | /* required-opps not fully initialized yet */ |
2798 | if (lazy_linking_pending(src_table)) | |
2799 | return -EBUSY; | |
2800 | ||
c8a59103 VK |
2801 | for (i = 0; i < src_table->required_opp_count; i++) { |
2802 | if (src_table->required_opp_tables[i]->np == dst_table->np) | |
2803 | break; | |
2804 | } | |
2805 | ||
2806 | if (unlikely(i == src_table->required_opp_count)) { | |
2807 | pr_err("%s: Couldn't find matching OPP table (%p: %p)\n", | |
2808 | __func__, src_table, dst_table); | |
2809 | return -EINVAL; | |
2810 | } | |
2811 | ||
2812 | mutex_lock(&src_table->lock); | |
2813 | ||
2814 | list_for_each_entry(opp, &src_table->opp_list, node) { | |
7c41cdcd VK |
2815 | if (opp->level == pstate) { |
2816 | dest_pstate = opp->required_opps[i]->level; | |
c8a59103 VK |
2817 | goto unlock; |
2818 | } | |
2819 | } | |
2820 | ||
2821 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table, | |
2822 | dst_table); | |
2823 | ||
2824 | unlock: | |
2825 | mutex_unlock(&src_table->lock); | |
2826 | ||
2827 | return dest_pstate; | |
2828 | } | |
2829 | ||
38393409 | 2830 | /** |
248a38d5 UH |
2831 | * dev_pm_opp_add_dynamic() - Add an OPP table from a table definitions |
2832 | * @dev: The device for which we do this operation | |
2833 | * @data: The OPP data for the OPP to add | |
38393409 | 2834 | * |
2c2709dc | 2835 | * This function adds an opp definition to the opp table and returns status. |
38393409 VK |
2836 | * The opp is made available by default and it can be controlled using |
2837 | * dev_pm_opp_enable/disable functions. | |
2838 | * | |
38393409 | 2839 | * Return: |
984f16c8 | 2840 | * 0 On success OR |
38393409 | 2841 | * Duplicate OPPs (both freq and volt are same) and opp->available |
984f16c8 | 2842 | * -EEXIST Freq are same and volt are different OR |
38393409 | 2843 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
984f16c8 | 2844 | * -ENOMEM Memory allocation failure |
38393409 | 2845 | */ |
248a38d5 | 2846 | int dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *data) |
38393409 | 2847 | { |
8cd2f6e8 VK |
2848 | struct opp_table *opp_table; |
2849 | int ret; | |
2850 | ||
32439ac7 | 2851 | opp_table = _add_opp_table(dev, true); |
dd461cd9 SG |
2852 | if (IS_ERR(opp_table)) |
2853 | return PTR_ERR(opp_table); | |
8cd2f6e8 | 2854 | |
46f48aca VK |
2855 | /* Fix regulator count for dynamic OPPs */ |
2856 | opp_table->regulator_count = 1; | |
2857 | ||
248a38d5 | 2858 | ret = _opp_add_v1(opp_table, dev, data, true); |
0ad8c623 VK |
2859 | if (ret) |
2860 | dev_pm_opp_put_opp_table(opp_table); | |
8cd2f6e8 | 2861 | |
8cd2f6e8 | 2862 | return ret; |
38393409 | 2863 | } |
248a38d5 | 2864 | EXPORT_SYMBOL_GPL(dev_pm_opp_add_dynamic); |
e1f60b29 NM |
2865 | |
2866 | /** | |
327854c8 | 2867 | * _opp_set_availability() - helper to set the availability of an opp |
e1f60b29 NM |
2868 | * @dev: device for which we do this operation |
2869 | * @freq: OPP frequency to modify availability | |
2870 | * @availability_req: availability status requested for this opp | |
2871 | * | |
052c6f19 VK |
2872 | * Set the availability of an OPP, opp_{enable,disable} share a common logic |
2873 | * which is isolated here. | |
e1f60b29 | 2874 | * |
984f16c8 | 2875 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
e1a2d49c | 2876 | * copy operation, returns 0 if no modification was done OR modification was |
e1f60b29 | 2877 | * successful. |
e1f60b29 | 2878 | */ |
327854c8 NM |
2879 | static int _opp_set_availability(struct device *dev, unsigned long freq, |
2880 | bool availability_req) | |
e1f60b29 | 2881 | { |
2c2709dc | 2882 | struct opp_table *opp_table; |
a7f3987e | 2883 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
e1f60b29 NM |
2884 | int r = 0; |
2885 | ||
2c2709dc VK |
2886 | /* Find the opp_table */ |
2887 | opp_table = _find_opp_table(dev); | |
2888 | if (IS_ERR(opp_table)) { | |
2889 | r = PTR_ERR(opp_table); | |
e1f60b29 | 2890 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
a7f3987e | 2891 | return r; |
e1f60b29 NM |
2892 | } |
2893 | ||
f123ea74 VK |
2894 | if (!assert_single_clk(opp_table)) { |
2895 | r = -EINVAL; | |
2896 | goto put_table; | |
2897 | } | |
2898 | ||
37a73ec0 VK |
2899 | mutex_lock(&opp_table->lock); |
2900 | ||
e1f60b29 | 2901 | /* Do we have the frequency? */ |
2c2709dc | 2902 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
2083da24 | 2903 | if (tmp_opp->rates[0] == freq) { |
e1f60b29 NM |
2904 | opp = tmp_opp; |
2905 | break; | |
2906 | } | |
2907 | } | |
37a73ec0 | 2908 | |
e1f60b29 NM |
2909 | if (IS_ERR(opp)) { |
2910 | r = PTR_ERR(opp); | |
2911 | goto unlock; | |
2912 | } | |
2913 | ||
2914 | /* Is update really needed? */ | |
2915 | if (opp->available == availability_req) | |
2916 | goto unlock; | |
e1f60b29 | 2917 | |
a7f3987e | 2918 | opp->available = availability_req; |
e1f60b29 | 2919 | |
e4d8ae00 VK |
2920 | dev_pm_opp_get(opp); |
2921 | mutex_unlock(&opp_table->lock); | |
2922 | ||
03ca370f MH |
2923 | /* Notify the change of the OPP availability */ |
2924 | if (availability_req) | |
052c6f19 | 2925 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE, |
a7f3987e | 2926 | opp); |
03ca370f | 2927 | else |
052c6f19 | 2928 | blocking_notifier_call_chain(&opp_table->head, |
a7f3987e | 2929 | OPP_EVENT_DISABLE, opp); |
e1f60b29 | 2930 | |
e4d8ae00 VK |
2931 | dev_pm_opp_put(opp); |
2932 | goto put_table; | |
2933 | ||
e1f60b29 | 2934 | unlock: |
5b650b38 | 2935 | mutex_unlock(&opp_table->lock); |
e4d8ae00 | 2936 | put_table: |
5b650b38 | 2937 | dev_pm_opp_put_opp_table(opp_table); |
e1f60b29 NM |
2938 | return r; |
2939 | } | |
2940 | ||
25cb20a2 SB |
2941 | /** |
2942 | * dev_pm_opp_adjust_voltage() - helper to change the voltage of an OPP | |
2943 | * @dev: device for which we do this operation | |
2944 | * @freq: OPP frequency to adjust voltage of | |
2945 | * @u_volt: new OPP target voltage | |
2946 | * @u_volt_min: new OPP min voltage | |
2947 | * @u_volt_max: new OPP max voltage | |
2948 | * | |
2949 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the | |
2950 | * copy operation, returns 0 if no modifcation was done OR modification was | |
2951 | * successful. | |
2952 | */ | |
2953 | int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, | |
2954 | unsigned long u_volt, unsigned long u_volt_min, | |
2955 | unsigned long u_volt_max) | |
2956 | ||
2957 | { | |
2958 | struct opp_table *opp_table; | |
2959 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); | |
2960 | int r = 0; | |
2961 | ||
2962 | /* Find the opp_table */ | |
2963 | opp_table = _find_opp_table(dev); | |
2964 | if (IS_ERR(opp_table)) { | |
2965 | r = PTR_ERR(opp_table); | |
2966 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); | |
2967 | return r; | |
2968 | } | |
2969 | ||
f123ea74 VK |
2970 | if (!assert_single_clk(opp_table)) { |
2971 | r = -EINVAL; | |
2972 | goto put_table; | |
2973 | } | |
2974 | ||
25cb20a2 SB |
2975 | mutex_lock(&opp_table->lock); |
2976 | ||
2977 | /* Do we have the frequency? */ | |
2978 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { | |
2083da24 | 2979 | if (tmp_opp->rates[0] == freq) { |
25cb20a2 SB |
2980 | opp = tmp_opp; |
2981 | break; | |
2982 | } | |
2983 | } | |
2984 | ||
2985 | if (IS_ERR(opp)) { | |
2986 | r = PTR_ERR(opp); | |
2987 | goto adjust_unlock; | |
2988 | } | |
2989 | ||
2990 | /* Is update really needed? */ | |
2991 | if (opp->supplies->u_volt == u_volt) | |
2992 | goto adjust_unlock; | |
2993 | ||
2994 | opp->supplies->u_volt = u_volt; | |
2995 | opp->supplies->u_volt_min = u_volt_min; | |
2996 | opp->supplies->u_volt_max = u_volt_max; | |
2997 | ||
2998 | dev_pm_opp_get(opp); | |
2999 | mutex_unlock(&opp_table->lock); | |
3000 | ||
3001 | /* Notify the voltage change of the OPP */ | |
3002 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE, | |
3003 | opp); | |
3004 | ||
3005 | dev_pm_opp_put(opp); | |
f123ea74 | 3006 | goto put_table; |
25cb20a2 SB |
3007 | |
3008 | adjust_unlock: | |
3009 | mutex_unlock(&opp_table->lock); | |
f123ea74 | 3010 | put_table: |
25cb20a2 SB |
3011 | dev_pm_opp_put_opp_table(opp_table); |
3012 | return r; | |
3013 | } | |
03649154 | 3014 | EXPORT_SYMBOL_GPL(dev_pm_opp_adjust_voltage); |
25cb20a2 | 3015 | |
0b40dd3b VK |
3016 | /** |
3017 | * dev_pm_opp_sync_regulators() - Sync state of voltage regulators | |
3018 | * @dev: device for which we do this operation | |
3019 | * | |
3020 | * Sync voltage state of the OPP table regulators. | |
3021 | * | |
3022 | * Return: 0 on success or a negative error value. | |
3023 | */ | |
3024 | int dev_pm_opp_sync_regulators(struct device *dev) | |
3025 | { | |
3026 | struct opp_table *opp_table; | |
3027 | struct regulator *reg; | |
3028 | int i, ret = 0; | |
3029 | ||
3030 | /* Device may not have OPP table */ | |
3031 | opp_table = _find_opp_table(dev); | |
3032 | if (IS_ERR(opp_table)) | |
3033 | return 0; | |
3034 | ||
3035 | /* Regulator may not be required for the device */ | |
3036 | if (unlikely(!opp_table->regulators)) | |
3037 | goto put_table; | |
3038 | ||
3039 | /* Nothing to sync if voltage wasn't changed */ | |
3040 | if (!opp_table->enabled) | |
3041 | goto put_table; | |
3042 | ||
3043 | for (i = 0; i < opp_table->regulator_count; i++) { | |
3044 | reg = opp_table->regulators[i]; | |
3045 | ret = regulator_sync_voltage(reg); | |
3046 | if (ret) | |
3047 | break; | |
3048 | } | |
3049 | put_table: | |
3050 | /* Drop reference taken by _find_opp_table() */ | |
3051 | dev_pm_opp_put_opp_table(opp_table); | |
3052 | ||
3053 | return ret; | |
3054 | } | |
3055 | EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators); | |
3056 | ||
e1f60b29 | 3057 | /** |
5d4879cd | 3058 | * dev_pm_opp_enable() - Enable a specific OPP |
e1f60b29 NM |
3059 | * @dev: device for which we do this operation |
3060 | * @freq: OPP frequency to enable | |
3061 | * | |
3062 | * Enables a provided opp. If the operation is valid, this returns 0, else the | |
3063 | * corresponding error value. It is meant to be used for users an OPP available | |
5d4879cd | 3064 | * after being temporarily made unavailable with dev_pm_opp_disable. |
e1f60b29 | 3065 | * |
984f16c8 | 3066 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
e1a2d49c | 3067 | * copy operation, returns 0 if no modification was done OR modification was |
984f16c8 | 3068 | * successful. |
e1f60b29 | 3069 | */ |
5d4879cd | 3070 | int dev_pm_opp_enable(struct device *dev, unsigned long freq) |
e1f60b29 | 3071 | { |
327854c8 | 3072 | return _opp_set_availability(dev, freq, true); |
e1f60b29 | 3073 | } |
5d4879cd | 3074 | EXPORT_SYMBOL_GPL(dev_pm_opp_enable); |
e1f60b29 NM |
3075 | |
3076 | /** | |
5d4879cd | 3077 | * dev_pm_opp_disable() - Disable a specific OPP |
e1f60b29 NM |
3078 | * @dev: device for which we do this operation |
3079 | * @freq: OPP frequency to disable | |
3080 | * | |
3081 | * Disables a provided opp. If the operation is valid, this returns | |
3082 | * 0, else the corresponding error value. It is meant to be a temporary | |
3083 | * control by users to make this OPP not available until the circumstances are | |
5d4879cd | 3084 | * right to make it available again (with a call to dev_pm_opp_enable). |
e1f60b29 | 3085 | * |
984f16c8 | 3086 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
e1a2d49c | 3087 | * copy operation, returns 0 if no modification was done OR modification was |
984f16c8 | 3088 | * successful. |
e1f60b29 | 3089 | */ |
5d4879cd | 3090 | int dev_pm_opp_disable(struct device *dev, unsigned long freq) |
e1f60b29 | 3091 | { |
327854c8 | 3092 | return _opp_set_availability(dev, freq, false); |
e1f60b29 | 3093 | } |
5d4879cd | 3094 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
e1f60b29 | 3095 | |
03ca370f | 3096 | /** |
dc2c9ad5 VK |
3097 | * dev_pm_opp_register_notifier() - Register OPP notifier for the device |
3098 | * @dev: Device for which notifier needs to be registered | |
3099 | * @nb: Notifier block to be registered | |
984f16c8 | 3100 | * |
dc2c9ad5 VK |
3101 | * Return: 0 on success or a negative error value. |
3102 | */ | |
3103 | int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb) | |
3104 | { | |
3105 | struct opp_table *opp_table; | |
3106 | int ret; | |
3107 | ||
dc2c9ad5 | 3108 | opp_table = _find_opp_table(dev); |
5b650b38 VK |
3109 | if (IS_ERR(opp_table)) |
3110 | return PTR_ERR(opp_table); | |
3111 | ||
052c6f19 | 3112 | ret = blocking_notifier_chain_register(&opp_table->head, nb); |
dc2c9ad5 | 3113 | |
5b650b38 | 3114 | dev_pm_opp_put_opp_table(opp_table); |
dc2c9ad5 VK |
3115 | |
3116 | return ret; | |
3117 | } | |
3118 | EXPORT_SYMBOL(dev_pm_opp_register_notifier); | |
3119 | ||
3120 | /** | |
3121 | * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device | |
3122 | * @dev: Device for which notifier needs to be unregistered | |
3123 | * @nb: Notifier block to be unregistered | |
984f16c8 | 3124 | * |
dc2c9ad5 | 3125 | * Return: 0 on success or a negative error value. |
03ca370f | 3126 | */ |
dc2c9ad5 VK |
3127 | int dev_pm_opp_unregister_notifier(struct device *dev, |
3128 | struct notifier_block *nb) | |
03ca370f | 3129 | { |
dc2c9ad5 VK |
3130 | struct opp_table *opp_table; |
3131 | int ret; | |
03ca370f | 3132 | |
dc2c9ad5 | 3133 | opp_table = _find_opp_table(dev); |
5b650b38 VK |
3134 | if (IS_ERR(opp_table)) |
3135 | return PTR_ERR(opp_table); | |
dc2c9ad5 | 3136 | |
052c6f19 | 3137 | ret = blocking_notifier_chain_unregister(&opp_table->head, nb); |
03ca370f | 3138 | |
5b650b38 | 3139 | dev_pm_opp_put_opp_table(opp_table); |
dc2c9ad5 VK |
3140 | |
3141 | return ret; | |
03ca370f | 3142 | } |
dc2c9ad5 | 3143 | EXPORT_SYMBOL(dev_pm_opp_unregister_notifier); |
b496dfbc | 3144 | |
8aaf6264 VK |
3145 | /** |
3146 | * dev_pm_opp_remove_table() - Free all OPPs associated with the device | |
3147 | * @dev: device pointer used to lookup OPP table. | |
3148 | * | |
3149 | * Free both OPPs created using static entries present in DT and the | |
3150 | * dynamically added entries. | |
3151 | */ | |
3152 | void dev_pm_opp_remove_table(struct device *dev) | |
9274c892 VK |
3153 | { |
3154 | struct opp_table *opp_table; | |
3155 | ||
2c2709dc VK |
3156 | /* Check for existing table for 'dev' */ |
3157 | opp_table = _find_opp_table(dev); | |
3158 | if (IS_ERR(opp_table)) { | |
3159 | int error = PTR_ERR(opp_table); | |
737002b5 VK |
3160 | |
3161 | if (error != -ENODEV) | |
2c2709dc | 3162 | WARN(1, "%s: opp_table: %d\n", |
737002b5 VK |
3163 | IS_ERR_OR_NULL(dev) ? |
3164 | "Invalid device" : dev_name(dev), | |
3165 | error); | |
5b650b38 | 3166 | return; |
737002b5 VK |
3167 | } |
3168 | ||
922ff075 VK |
3169 | /* |
3170 | * Drop the extra reference only if the OPP table was successfully added | |
3171 | * with dev_pm_opp_of_add_table() earlier. | |
3172 | **/ | |
3173 | if (_opp_remove_all_static(opp_table)) | |
3174 | dev_pm_opp_put_opp_table(opp_table); | |
cdd6ed90 VK |
3175 | |
3176 | /* Drop reference taken by _find_opp_table() */ | |
3177 | dev_pm_opp_put_opp_table(opp_table); | |
737002b5 | 3178 | } |
411466c5 | 3179 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); |