Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ff764963 KVA |
2 | /* |
3 | * phy-core.c -- Generic Phy framework. | |
4 | * | |
5 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com | |
6 | * | |
7 | * Author: Kishon Vijay Abraham I <kishon@ti.com> | |
ff764963 KVA |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/export.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/of.h> | |
17 | #include <linux/phy/phy.h> | |
18 | #include <linux/idr.h> | |
19 | #include <linux/pm_runtime.h> | |
3be88125 | 20 | #include <linux/regulator/consumer.h> |
ff764963 KVA |
21 | |
22 | static struct class *phy_class; | |
23 | static DEFINE_MUTEX(phy_provider_mutex); | |
24 | static LIST_HEAD(phy_provider_list); | |
b7bc15b9 | 25 | static LIST_HEAD(phys); |
ff764963 KVA |
26 | static DEFINE_IDA(phy_ida); |
27 | ||
28 | static void devm_phy_release(struct device *dev, void *res) | |
29 | { | |
30 | struct phy *phy = *(struct phy **)res; | |
31 | ||
987351e1 | 32 | phy_put(dev, phy); |
ff764963 KVA |
33 | } |
34 | ||
35 | static void devm_phy_provider_release(struct device *dev, void *res) | |
36 | { | |
37 | struct phy_provider *phy_provider = *(struct phy_provider **)res; | |
38 | ||
39 | of_phy_provider_unregister(phy_provider); | |
40 | } | |
41 | ||
42 | static void devm_phy_consume(struct device *dev, void *res) | |
43 | { | |
44 | struct phy *phy = *(struct phy **)res; | |
45 | ||
46 | phy_destroy(phy); | |
47 | } | |
48 | ||
49 | static int devm_phy_match(struct device *dev, void *res, void *match_data) | |
50 | { | |
2f1bce48 TR |
51 | struct phy **phy = res; |
52 | ||
53 | return *phy == match_data; | |
ff764963 KVA |
54 | } |
55 | ||
b7bc15b9 HK |
56 | /** |
57 | * phy_create_lookup() - allocate and register PHY/device association | |
58 | * @phy: the phy of the association | |
59 | * @con_id: connection ID string on device | |
60 | * @dev_id: the device of the association | |
61 | * | |
62 | * Creates and registers phy_lookup entry. | |
63 | */ | |
64 | int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
65 | { | |
66 | struct phy_lookup *pl; | |
67 | ||
68 | if (!phy || !dev_id || !con_id) | |
69 | return -EINVAL; | |
70 | ||
71 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); | |
72 | if (!pl) | |
73 | return -ENOMEM; | |
74 | ||
75 | pl->dev_id = dev_id; | |
76 | pl->con_id = con_id; | |
77 | pl->phy = phy; | |
78 | ||
79 | mutex_lock(&phy_provider_mutex); | |
80 | list_add_tail(&pl->node, &phys); | |
81 | mutex_unlock(&phy_provider_mutex); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | EXPORT_SYMBOL_GPL(phy_create_lookup); | |
86 | ||
87 | /** | |
88 | * phy_remove_lookup() - find and remove PHY/device association | |
89 | * @phy: the phy of the association | |
90 | * @con_id: connection ID string on device | |
91 | * @dev_id: the device of the association | |
92 | * | |
93 | * Finds and unregisters phy_lookup entry that was created with | |
94 | * phy_create_lookup(). | |
95 | */ | |
96 | void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
97 | { | |
98 | struct phy_lookup *pl; | |
99 | ||
100 | if (!phy || !dev_id || !con_id) | |
101 | return; | |
102 | ||
103 | mutex_lock(&phy_provider_mutex); | |
104 | list_for_each_entry(pl, &phys, node) | |
105 | if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) && | |
106 | !strcmp(pl->con_id, con_id)) { | |
107 | list_del(&pl->node); | |
108 | kfree(pl); | |
109 | break; | |
110 | } | |
111 | mutex_unlock(&phy_provider_mutex); | |
112 | } | |
113 | EXPORT_SYMBOL_GPL(phy_remove_lookup); | |
114 | ||
115 | static struct phy *phy_find(struct device *dev, const char *con_id) | |
116 | { | |
117 | const char *dev_id = dev_name(dev); | |
118 | struct phy_lookup *p, *pl = NULL; | |
b7bc15b9 HK |
119 | |
120 | mutex_lock(&phy_provider_mutex); | |
121 | list_for_each_entry(p, &phys, node) | |
122 | if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) { | |
123 | pl = p; | |
124 | break; | |
125 | } | |
126 | mutex_unlock(&phy_provider_mutex); | |
127 | ||
dbc98635 | 128 | return pl ? pl->phy : ERR_PTR(-ENODEV); |
b7bc15b9 HK |
129 | } |
130 | ||
ff764963 KVA |
131 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
132 | { | |
133 | struct phy_provider *phy_provider; | |
2a4c3701 | 134 | struct device_node *child; |
ff764963 KVA |
135 | |
136 | list_for_each_entry(phy_provider, &phy_provider_list, list) { | |
137 | if (phy_provider->dev->of_node == node) | |
138 | return phy_provider; | |
2a4c3701 | 139 | |
1140f7c8 | 140 | for_each_child_of_node(phy_provider->children, child) |
2a4c3701 KVA |
141 | if (child == node) |
142 | return phy_provider; | |
ff764963 KVA |
143 | } |
144 | ||
145 | return ERR_PTR(-EPROBE_DEFER); | |
146 | } | |
147 | ||
148 | int phy_pm_runtime_get(struct phy *phy) | |
149 | { | |
cedb7f89 FB |
150 | int ret; |
151 | ||
8866df25 MG |
152 | if (!phy) |
153 | return 0; | |
154 | ||
ff764963 KVA |
155 | if (!pm_runtime_enabled(&phy->dev)) |
156 | return -ENOTSUPP; | |
157 | ||
cedb7f89 FB |
158 | ret = pm_runtime_get(&phy->dev); |
159 | if (ret < 0 && ret != -EINPROGRESS) | |
160 | pm_runtime_put_noidle(&phy->dev); | |
161 | ||
162 | return ret; | |
ff764963 KVA |
163 | } |
164 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); | |
165 | ||
166 | int phy_pm_runtime_get_sync(struct phy *phy) | |
167 | { | |
cedb7f89 FB |
168 | int ret; |
169 | ||
8866df25 MG |
170 | if (!phy) |
171 | return 0; | |
172 | ||
ff764963 KVA |
173 | if (!pm_runtime_enabled(&phy->dev)) |
174 | return -ENOTSUPP; | |
175 | ||
cedb7f89 FB |
176 | ret = pm_runtime_get_sync(&phy->dev); |
177 | if (ret < 0) | |
178 | pm_runtime_put_sync(&phy->dev); | |
179 | ||
180 | return ret; | |
ff764963 KVA |
181 | } |
182 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); | |
183 | ||
184 | int phy_pm_runtime_put(struct phy *phy) | |
185 | { | |
8866df25 MG |
186 | if (!phy) |
187 | return 0; | |
188 | ||
ff764963 KVA |
189 | if (!pm_runtime_enabled(&phy->dev)) |
190 | return -ENOTSUPP; | |
191 | ||
192 | return pm_runtime_put(&phy->dev); | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); | |
195 | ||
196 | int phy_pm_runtime_put_sync(struct phy *phy) | |
197 | { | |
8866df25 MG |
198 | if (!phy) |
199 | return 0; | |
200 | ||
ff764963 KVA |
201 | if (!pm_runtime_enabled(&phy->dev)) |
202 | return -ENOTSUPP; | |
203 | ||
204 | return pm_runtime_put_sync(&phy->dev); | |
205 | } | |
206 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); | |
207 | ||
208 | void phy_pm_runtime_allow(struct phy *phy) | |
209 | { | |
8866df25 MG |
210 | if (!phy) |
211 | return; | |
212 | ||
ff764963 KVA |
213 | if (!pm_runtime_enabled(&phy->dev)) |
214 | return; | |
215 | ||
216 | pm_runtime_allow(&phy->dev); | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); | |
219 | ||
220 | void phy_pm_runtime_forbid(struct phy *phy) | |
221 | { | |
8866df25 MG |
222 | if (!phy) |
223 | return; | |
224 | ||
ff764963 KVA |
225 | if (!pm_runtime_enabled(&phy->dev)) |
226 | return; | |
227 | ||
228 | pm_runtime_forbid(&phy->dev); | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); | |
231 | ||
232 | int phy_init(struct phy *phy) | |
233 | { | |
234 | int ret; | |
235 | ||
04c2faca AL |
236 | if (!phy) |
237 | return 0; | |
238 | ||
ff764963 KVA |
239 | ret = phy_pm_runtime_get_sync(phy); |
240 | if (ret < 0 && ret != -ENOTSUPP) | |
241 | return ret; | |
736b67a3 | 242 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
243 | |
244 | mutex_lock(&phy->mutex); | |
637d378c | 245 | if (phy->init_count == 0 && phy->ops->init) { |
ff764963 KVA |
246 | ret = phy->ops->init(phy); |
247 | if (ret < 0) { | |
248 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); | |
249 | goto out; | |
250 | } | |
251 | } | |
637d378c | 252 | ++phy->init_count; |
ff764963 KVA |
253 | |
254 | out: | |
255 | mutex_unlock(&phy->mutex); | |
256 | phy_pm_runtime_put(phy); | |
257 | return ret; | |
258 | } | |
259 | EXPORT_SYMBOL_GPL(phy_init); | |
260 | ||
261 | int phy_exit(struct phy *phy) | |
262 | { | |
263 | int ret; | |
264 | ||
04c2faca AL |
265 | if (!phy) |
266 | return 0; | |
267 | ||
ff764963 KVA |
268 | ret = phy_pm_runtime_get_sync(phy); |
269 | if (ret < 0 && ret != -ENOTSUPP) | |
270 | return ret; | |
736b67a3 | 271 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
272 | |
273 | mutex_lock(&phy->mutex); | |
637d378c | 274 | if (phy->init_count == 1 && phy->ops->exit) { |
ff764963 KVA |
275 | ret = phy->ops->exit(phy); |
276 | if (ret < 0) { | |
277 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); | |
278 | goto out; | |
279 | } | |
280 | } | |
637d378c | 281 | --phy->init_count; |
ff764963 KVA |
282 | |
283 | out: | |
284 | mutex_unlock(&phy->mutex); | |
285 | phy_pm_runtime_put(phy); | |
286 | return ret; | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(phy_exit); | |
289 | ||
290 | int phy_power_on(struct phy *phy) | |
291 | { | |
b82fcabe | 292 | int ret = 0; |
ff764963 | 293 | |
04c2faca | 294 | if (!phy) |
b82fcabe | 295 | goto out; |
04c2faca | 296 | |
3be88125 RQ |
297 | if (phy->pwr) { |
298 | ret = regulator_enable(phy->pwr); | |
299 | if (ret) | |
b82fcabe | 300 | goto out; |
3be88125 RQ |
301 | } |
302 | ||
ff764963 KVA |
303 | ret = phy_pm_runtime_get_sync(phy); |
304 | if (ret < 0 && ret != -ENOTSUPP) | |
b82fcabe SL |
305 | goto err_pm_sync; |
306 | ||
736b67a3 | 307 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
308 | |
309 | mutex_lock(&phy->mutex); | |
637d378c | 310 | if (phy->power_count == 0 && phy->ops->power_on) { |
ff764963 KVA |
311 | ret = phy->ops->power_on(phy); |
312 | if (ret < 0) { | |
313 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); | |
b82fcabe | 314 | goto err_pwr_on; |
ff764963 KVA |
315 | } |
316 | } | |
637d378c KVA |
317 | ++phy->power_count; |
318 | mutex_unlock(&phy->mutex); | |
319 | return 0; | |
ff764963 | 320 | |
b82fcabe | 321 | err_pwr_on: |
ff764963 | 322 | mutex_unlock(&phy->mutex); |
637d378c | 323 | phy_pm_runtime_put_sync(phy); |
b82fcabe | 324 | err_pm_sync: |
3be88125 RQ |
325 | if (phy->pwr) |
326 | regulator_disable(phy->pwr); | |
b82fcabe | 327 | out: |
ff764963 KVA |
328 | return ret; |
329 | } | |
330 | EXPORT_SYMBOL_GPL(phy_power_on); | |
331 | ||
332 | int phy_power_off(struct phy *phy) | |
333 | { | |
d18c9604 | 334 | int ret; |
ff764963 | 335 | |
04c2faca AL |
336 | if (!phy) |
337 | return 0; | |
338 | ||
ff764963 | 339 | mutex_lock(&phy->mutex); |
637d378c | 340 | if (phy->power_count == 1 && phy->ops->power_off) { |
ff764963 KVA |
341 | ret = phy->ops->power_off(phy); |
342 | if (ret < 0) { | |
343 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); | |
637d378c KVA |
344 | mutex_unlock(&phy->mutex); |
345 | return ret; | |
ff764963 KVA |
346 | } |
347 | } | |
637d378c | 348 | --phy->power_count; |
ff764963 KVA |
349 | mutex_unlock(&phy->mutex); |
350 | phy_pm_runtime_put(phy); | |
351 | ||
3be88125 RQ |
352 | if (phy->pwr) |
353 | regulator_disable(phy->pwr); | |
354 | ||
637d378c | 355 | return 0; |
ff764963 KVA |
356 | } |
357 | EXPORT_SYMBOL_GPL(phy_power_off); | |
358 | ||
79a5a18a | 359 | int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) |
300eb013 DL |
360 | { |
361 | int ret; | |
362 | ||
363 | if (!phy || !phy->ops->set_mode) | |
364 | return 0; | |
365 | ||
366 | mutex_lock(&phy->mutex); | |
79a5a18a | 367 | ret = phy->ops->set_mode(phy, mode, submode); |
3b3cd24a MG |
368 | if (!ret) |
369 | phy->attrs.mode = mode; | |
300eb013 DL |
370 | mutex_unlock(&phy->mutex); |
371 | ||
372 | return ret; | |
373 | } | |
79a5a18a | 374 | EXPORT_SYMBOL_GPL(phy_set_mode_ext); |
300eb013 | 375 | |
6c172e73 SH |
376 | int phy_set_media(struct phy *phy, enum phy_media media) |
377 | { | |
378 | int ret; | |
379 | ||
380 | if (!phy || !phy->ops->set_media) | |
381 | return 0; | |
382 | ||
383 | mutex_lock(&phy->mutex); | |
384 | ret = phy->ops->set_media(phy, media); | |
385 | mutex_unlock(&phy->mutex); | |
386 | ||
387 | return ret; | |
388 | } | |
389 | EXPORT_SYMBOL_GPL(phy_set_media); | |
390 | ||
391 | int phy_set_speed(struct phy *phy, int speed) | |
392 | { | |
393 | int ret; | |
394 | ||
395 | if (!phy || !phy->ops->set_speed) | |
396 | return 0; | |
397 | ||
398 | mutex_lock(&phy->mutex); | |
399 | ret = phy->ops->set_speed(phy, speed); | |
400 | mutex_unlock(&phy->mutex); | |
401 | ||
402 | return ret; | |
403 | } | |
404 | EXPORT_SYMBOL_GPL(phy_set_speed); | |
405 | ||
cac18ecb RL |
406 | int phy_reset(struct phy *phy) |
407 | { | |
408 | int ret; | |
409 | ||
410 | if (!phy || !phy->ops->reset) | |
411 | return 0; | |
412 | ||
4df614c4 KVA |
413 | ret = phy_pm_runtime_get_sync(phy); |
414 | if (ret < 0 && ret != -ENOTSUPP) | |
415 | return ret; | |
416 | ||
cac18ecb RL |
417 | mutex_lock(&phy->mutex); |
418 | ret = phy->ops->reset(phy); | |
419 | mutex_unlock(&phy->mutex); | |
420 | ||
4df614c4 KVA |
421 | phy_pm_runtime_put(phy); |
422 | ||
cac18ecb RL |
423 | return ret; |
424 | } | |
425 | EXPORT_SYMBOL_GPL(phy_reset); | |
426 | ||
bbae18f0 MS |
427 | /** |
428 | * phy_calibrate() - Tunes the phy hw parameters for current configuration | |
429 | * @phy: the phy returned by phy_get() | |
430 | * | |
431 | * Used to calibrate phy hardware, typically by adjusting some parameters in | |
432 | * runtime, which are otherwise lost after host controller reset and cannot | |
433 | * be applied in phy_init() or phy_power_on(). | |
434 | * | |
435 | * Returns: 0 if successful, an negative error code otherwise | |
436 | */ | |
36914111 AP |
437 | int phy_calibrate(struct phy *phy) |
438 | { | |
439 | int ret; | |
440 | ||
441 | if (!phy || !phy->ops->calibrate) | |
442 | return 0; | |
443 | ||
444 | mutex_lock(&phy->mutex); | |
445 | ret = phy->ops->calibrate(phy); | |
446 | mutex_unlock(&phy->mutex); | |
447 | ||
448 | return ret; | |
449 | } | |
450 | EXPORT_SYMBOL_GPL(phy_calibrate); | |
451 | ||
aeaac93d MR |
452 | /** |
453 | * phy_configure() - Changes the phy parameters | |
454 | * @phy: the phy returned by phy_get() | |
455 | * @opts: New configuration to apply | |
456 | * | |
457 | * Used to change the PHY parameters. phy_init() must have been called | |
458 | * on the phy. The configuration will be applied on the current phy | |
459 | * mode, that can be changed using phy_set_mode(). | |
460 | * | |
461 | * Returns: 0 if successful, an negative error code otherwise | |
462 | */ | |
463 | int phy_configure(struct phy *phy, union phy_configure_opts *opts) | |
464 | { | |
465 | int ret; | |
466 | ||
467 | if (!phy) | |
468 | return -EINVAL; | |
469 | ||
470 | if (!phy->ops->configure) | |
471 | return -EOPNOTSUPP; | |
472 | ||
473 | mutex_lock(&phy->mutex); | |
474 | ret = phy->ops->configure(phy, opts); | |
475 | mutex_unlock(&phy->mutex); | |
476 | ||
477 | return ret; | |
478 | } | |
479 | EXPORT_SYMBOL_GPL(phy_configure); | |
480 | ||
481 | /** | |
482 | * phy_validate() - Checks the phy parameters | |
483 | * @phy: the phy returned by phy_get() | |
484 | * @mode: phy_mode the configuration is applicable to. | |
485 | * @submode: PHY submode the configuration is applicable to. | |
486 | * @opts: Configuration to check | |
487 | * | |
488 | * Used to check that the current set of parameters can be handled by | |
489 | * the phy. Implementations are free to tune the parameters passed as | |
490 | * arguments if needed by some implementation detail or | |
491 | * constraints. It will not change any actual configuration of the | |
492 | * PHY, so calling it as many times as deemed fit will have no side | |
493 | * effect. | |
494 | * | |
495 | * Returns: 0 if successful, an negative error code otherwise | |
496 | */ | |
497 | int phy_validate(struct phy *phy, enum phy_mode mode, int submode, | |
498 | union phy_configure_opts *opts) | |
499 | { | |
500 | int ret; | |
501 | ||
502 | if (!phy) | |
503 | return -EINVAL; | |
504 | ||
505 | if (!phy->ops->validate) | |
506 | return -EOPNOTSUPP; | |
507 | ||
508 | mutex_lock(&phy->mutex); | |
509 | ret = phy->ops->validate(phy, mode, submode, opts); | |
510 | mutex_unlock(&phy->mutex); | |
511 | ||
512 | return ret; | |
513 | } | |
514 | EXPORT_SYMBOL_GPL(phy_validate); | |
515 | ||
ff764963 | 516 | /** |
0b3f3b2c KD |
517 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
518 | * @np: device_node for which to get the phy | |
ff764963 KVA |
519 | * @index: the index of the phy |
520 | * | |
521 | * Returns the phy associated with the given phandle value, | |
522 | * after getting a refcount to it or -ENODEV if there is no such phy or | |
523 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is | |
524 | * not yet loaded. This function uses of_xlate call back function provided | |
525 | * while registering the phy_provider to find the phy instance. | |
526 | */ | |
0b3f3b2c | 527 | static struct phy *_of_phy_get(struct device_node *np, int index) |
ff764963 KVA |
528 | { |
529 | int ret; | |
530 | struct phy_provider *phy_provider; | |
531 | struct phy *phy = NULL; | |
532 | struct of_phandle_args args; | |
533 | ||
0b3f3b2c | 534 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
ff764963 | 535 | index, &args); |
0b3f3b2c | 536 | if (ret) |
ff764963 | 537 | return ERR_PTR(-ENODEV); |
ff764963 | 538 | |
b7563e27 AB |
539 | /* This phy type handled by the usb-phy subsystem for now */ |
540 | if (of_device_is_compatible(args.np, "usb-nop-xceiv")) | |
541 | return ERR_PTR(-ENODEV); | |
542 | ||
ff764963 KVA |
543 | mutex_lock(&phy_provider_mutex); |
544 | phy_provider = of_phy_provider_lookup(args.np); | |
545 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { | |
546 | phy = ERR_PTR(-EPROBE_DEFER); | |
33f434d2 AL |
547 | goto out_unlock; |
548 | } | |
549 | ||
550 | if (!of_device_is_available(args.np)) { | |
551 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n"); | |
552 | phy = ERR_PTR(-ENODEV); | |
553 | goto out_put_module; | |
ff764963 KVA |
554 | } |
555 | ||
556 | phy = phy_provider->of_xlate(phy_provider->dev, &args); | |
33f434d2 AL |
557 | |
558 | out_put_module: | |
ff764963 KVA |
559 | module_put(phy_provider->owner); |
560 | ||
33f434d2 | 561 | out_unlock: |
ff764963 KVA |
562 | mutex_unlock(&phy_provider_mutex); |
563 | of_node_put(args.np); | |
564 | ||
565 | return phy; | |
566 | } | |
567 | ||
0b3f3b2c KD |
568 | /** |
569 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. | |
570 | * @np: device_node for which to get the phy | |
571 | * @con_id: name of the phy from device's point of view | |
572 | * | |
573 | * Returns the phy driver, after getting a refcount to it; or | |
574 | * -ENODEV if there is no such phy. The caller is responsible for | |
575 | * calling phy_put() to release that count. | |
576 | */ | |
577 | struct phy *of_phy_get(struct device_node *np, const char *con_id) | |
578 | { | |
579 | struct phy *phy = NULL; | |
580 | int index = 0; | |
581 | ||
582 | if (con_id) | |
583 | index = of_property_match_string(np, "phy-names", con_id); | |
584 | ||
585 | phy = _of_phy_get(np, index); | |
586 | if (IS_ERR(phy)) | |
587 | return phy; | |
588 | ||
589 | if (!try_module_get(phy->ops->owner)) | |
590 | return ERR_PTR(-EPROBE_DEFER); | |
591 | ||
592 | get_device(&phy->dev); | |
593 | ||
594 | return phy; | |
595 | } | |
596 | EXPORT_SYMBOL_GPL(of_phy_get); | |
597 | ||
ff764963 | 598 | /** |
987351e1 AT |
599 | * of_phy_put() - release the PHY |
600 | * @phy: the phy returned by of_phy_get() | |
ff764963 | 601 | * |
987351e1 | 602 | * Releases a refcount the caller received from of_phy_get(). |
ff764963 | 603 | */ |
987351e1 | 604 | void of_phy_put(struct phy *phy) |
ff764963 | 605 | { |
04c2faca | 606 | if (!phy || IS_ERR(phy)) |
ff764963 KVA |
607 | return; |
608 | ||
fec06b2b KVA |
609 | mutex_lock(&phy->mutex); |
610 | if (phy->ops->release) | |
611 | phy->ops->release(phy); | |
612 | mutex_unlock(&phy->mutex); | |
613 | ||
ff764963 KVA |
614 | module_put(phy->ops->owner); |
615 | put_device(&phy->dev); | |
616 | } | |
987351e1 AT |
617 | EXPORT_SYMBOL_GPL(of_phy_put); |
618 | ||
619 | /** | |
620 | * phy_put() - release the PHY | |
621 | * @dev: device that wants to release this phy | |
622 | * @phy: the phy returned by phy_get() | |
623 | * | |
624 | * Releases a refcount the caller received from phy_get(). | |
625 | */ | |
626 | void phy_put(struct device *dev, struct phy *phy) | |
627 | { | |
628 | device_link_remove(dev, &phy->dev); | |
629 | of_phy_put(phy); | |
630 | } | |
ff764963 KVA |
631 | EXPORT_SYMBOL_GPL(phy_put); |
632 | ||
633 | /** | |
634 | * devm_phy_put() - release the PHY | |
635 | * @dev: device that wants to release this phy | |
636 | * @phy: the phy returned by devm_phy_get() | |
637 | * | |
638 | * destroys the devres associated with this phy and invokes phy_put | |
639 | * to release the phy. | |
640 | */ | |
641 | void devm_phy_put(struct device *dev, struct phy *phy) | |
642 | { | |
643 | int r; | |
644 | ||
04c2faca AL |
645 | if (!phy) |
646 | return; | |
647 | ||
ff764963 KVA |
648 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
649 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
650 | } | |
651 | EXPORT_SYMBOL_GPL(devm_phy_put); | |
652 | ||
653 | /** | |
654 | * of_phy_simple_xlate() - returns the phy instance from phy provider | |
655 | * @dev: the PHY provider device | |
656 | * @args: of_phandle_args (not used here) | |
657 | * | |
658 | * Intended to be used by phy provider for the common case where #phy-cells is | |
659 | * 0. For other cases where #phy-cells is greater than '0', the phy provider | |
660 | * should provide a custom of_xlate function that reads the *args* and returns | |
661 | * the appropriate phy. | |
662 | */ | |
663 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args | |
664 | *args) | |
665 | { | |
666 | struct phy *phy; | |
667 | struct class_dev_iter iter; | |
ff764963 KVA |
668 | |
669 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
670 | while ((dev = class_dev_iter_next(&iter))) { | |
671 | phy = to_phy(dev); | |
491e0490 | 672 | if (args->np != phy->dev.of_node) |
ff764963 KVA |
673 | continue; |
674 | ||
675 | class_dev_iter_exit(&iter); | |
676 | return phy; | |
677 | } | |
678 | ||
679 | class_dev_iter_exit(&iter); | |
680 | return ERR_PTR(-ENODEV); | |
681 | } | |
682 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); | |
683 | ||
684 | /** | |
685 | * phy_get() - lookup and obtain a reference to a phy. | |
686 | * @dev: device that requests this phy | |
687 | * @string: the phy name as given in the dt data or the name of the controller | |
688 | * port for non-dt case | |
689 | * | |
690 | * Returns the phy driver, after getting a refcount to it; or | |
691 | * -ENODEV if there is no such phy. The caller is responsible for | |
692 | * calling phy_put() to release that count. | |
693 | */ | |
694 | struct phy *phy_get(struct device *dev, const char *string) | |
695 | { | |
696 | int index = 0; | |
d18c9604 | 697 | struct phy *phy; |
987351e1 | 698 | struct device_link *link; |
ff764963 KVA |
699 | |
700 | if (string == NULL) { | |
701 | dev_WARN(dev, "missing string\n"); | |
702 | return ERR_PTR(-EINVAL); | |
703 | } | |
704 | ||
705 | if (dev->of_node) { | |
706 | index = of_property_match_string(dev->of_node, "phy-names", | |
707 | string); | |
0b3f3b2c | 708 | phy = _of_phy_get(dev->of_node, index); |
ff764963 | 709 | } else { |
b7bc15b9 | 710 | phy = phy_find(dev, string); |
ff764963 | 711 | } |
f40037fd HG |
712 | if (IS_ERR(phy)) |
713 | return phy; | |
ff764963 KVA |
714 | |
715 | if (!try_module_get(phy->ops->owner)) | |
716 | return ERR_PTR(-EPROBE_DEFER); | |
717 | ||
718 | get_device(&phy->dev); | |
719 | ||
987351e1 | 720 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); |
1d7cb11e KVA |
721 | if (!link) |
722 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 723 | dev_name(phy->dev.parent)); |
987351e1 | 724 | |
ff764963 KVA |
725 | return phy; |
726 | } | |
727 | EXPORT_SYMBOL_GPL(phy_get); | |
728 | ||
788a4d56 AL |
729 | /** |
730 | * phy_optional_get() - lookup and obtain a reference to an optional phy. | |
731 | * @dev: device that requests this phy | |
732 | * @string: the phy name as given in the dt data or the name of the controller | |
733 | * port for non-dt case | |
734 | * | |
735 | * Returns the phy driver, after getting a refcount to it; or | |
736 | * NULL if there is no such phy. The caller is responsible for | |
737 | * calling phy_put() to release that count. | |
738 | */ | |
739 | struct phy *phy_optional_get(struct device *dev, const char *string) | |
740 | { | |
741 | struct phy *phy = phy_get(dev, string); | |
742 | ||
45586c70 | 743 | if (PTR_ERR(phy) == -ENODEV) |
788a4d56 AL |
744 | phy = NULL; |
745 | ||
746 | return phy; | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(phy_optional_get); | |
749 | ||
ff764963 KVA |
750 | /** |
751 | * devm_phy_get() - lookup and obtain a reference to a phy. | |
752 | * @dev: device that requests this phy | |
753 | * @string: the phy name as given in the dt data or phy device name | |
754 | * for non-dt case | |
755 | * | |
756 | * Gets the phy using phy_get(), and associates a device with it using | |
757 | * devres. On driver detach, release function is invoked on the devres data, | |
758 | * then, devres data is freed. | |
759 | */ | |
760 | struct phy *devm_phy_get(struct device *dev, const char *string) | |
761 | { | |
762 | struct phy **ptr, *phy; | |
763 | ||
764 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
765 | if (!ptr) | |
766 | return ERR_PTR(-ENOMEM); | |
767 | ||
768 | phy = phy_get(dev, string); | |
769 | if (!IS_ERR(phy)) { | |
770 | *ptr = phy; | |
771 | devres_add(dev, ptr); | |
772 | } else { | |
773 | devres_free(ptr); | |
774 | } | |
775 | ||
776 | return phy; | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(devm_phy_get); | |
779 | ||
788a4d56 AL |
780 | /** |
781 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. | |
782 | * @dev: device that requests this phy | |
783 | * @string: the phy name as given in the dt data or phy device name | |
784 | * for non-dt case | |
785 | * | |
786 | * Gets the phy using phy_get(), and associates a device with it using | |
787 | * devres. On driver detach, release function is invoked on the devres | |
788 | * data, then, devres data is freed. This differs to devm_phy_get() in | |
789 | * that if the phy does not exist, it is not considered an error and | |
790 | * -ENODEV will not be returned. Instead the NULL phy is returned, | |
791 | * which can be passed to all other phy consumer calls. | |
792 | */ | |
793 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) | |
794 | { | |
795 | struct phy *phy = devm_phy_get(dev, string); | |
796 | ||
45586c70 | 797 | if (PTR_ERR(phy) == -ENODEV) |
788a4d56 AL |
798 | phy = NULL; |
799 | ||
800 | return phy; | |
801 | } | |
802 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); | |
803 | ||
b5d682f4 KD |
804 | /** |
805 | * devm_of_phy_get() - lookup and obtain a reference to a phy. | |
806 | * @dev: device that requests this phy | |
807 | * @np: node containing the phy | |
808 | * @con_id: name of the phy from device's point of view | |
809 | * | |
810 | * Gets the phy using of_phy_get(), and associates a device with it using | |
811 | * devres. On driver detach, release function is invoked on the devres data, | |
812 | * then, devres data is freed. | |
813 | */ | |
814 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, | |
815 | const char *con_id) | |
816 | { | |
817 | struct phy **ptr, *phy; | |
987351e1 | 818 | struct device_link *link; |
b5d682f4 KD |
819 | |
820 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
821 | if (!ptr) | |
822 | return ERR_PTR(-ENOMEM); | |
823 | ||
824 | phy = of_phy_get(np, con_id); | |
825 | if (!IS_ERR(phy)) { | |
826 | *ptr = phy; | |
827 | devres_add(dev, ptr); | |
828 | } else { | |
829 | devres_free(ptr); | |
987351e1 AT |
830 | return phy; |
831 | } | |
832 | ||
833 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); | |
1d7cb11e KVA |
834 | if (!link) |
835 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 836 | dev_name(phy->dev.parent)); |
b5d682f4 KD |
837 | |
838 | return phy; | |
839 | } | |
840 | EXPORT_SYMBOL_GPL(devm_of_phy_get); | |
841 | ||
6be109b3 AR |
842 | /** |
843 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. | |
844 | * @dev: device that requests this phy | |
845 | * @np: node containing the phy | |
846 | * @index: index of the phy | |
847 | * | |
70874462 CY |
848 | * Gets the phy using _of_phy_get(), then gets a refcount to it, |
849 | * and associates a device with it using devres. On driver detach, | |
850 | * release function is invoked on the devres data, | |
6be109b3 AR |
851 | * then, devres data is freed. |
852 | * | |
853 | */ | |
854 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, | |
855 | int index) | |
856 | { | |
857 | struct phy **ptr, *phy; | |
987351e1 | 858 | struct device_link *link; |
6be109b3 AR |
859 | |
860 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
861 | if (!ptr) | |
862 | return ERR_PTR(-ENOMEM); | |
863 | ||
864 | phy = _of_phy_get(np, index); | |
70874462 | 865 | if (IS_ERR(phy)) { |
6be109b3 | 866 | devres_free(ptr); |
70874462 | 867 | return phy; |
6be109b3 AR |
868 | } |
869 | ||
70874462 CY |
870 | if (!try_module_get(phy->ops->owner)) { |
871 | devres_free(ptr); | |
872 | return ERR_PTR(-EPROBE_DEFER); | |
873 | } | |
874 | ||
875 | get_device(&phy->dev); | |
876 | ||
877 | *ptr = phy; | |
878 | devres_add(dev, ptr); | |
879 | ||
987351e1 | 880 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); |
1d7cb11e KVA |
881 | if (!link) |
882 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 883 | dev_name(phy->dev.parent)); |
987351e1 | 884 | |
6be109b3 AR |
885 | return phy; |
886 | } | |
887 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); | |
888 | ||
ff764963 KVA |
889 | /** |
890 | * phy_create() - create a new phy | |
891 | * @dev: device that is creating the new phy | |
f0ed8176 | 892 | * @node: device node of the phy |
ff764963 | 893 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
894 | * |
895 | * Called to create a phy using phy framework. | |
896 | */ | |
f0ed8176 | 897 | struct phy *phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 898 | const struct phy_ops *ops) |
ff764963 KVA |
899 | { |
900 | int ret; | |
901 | int id; | |
902 | struct phy *phy; | |
903 | ||
52797d29 DC |
904 | if (WARN_ON(!dev)) |
905 | return ERR_PTR(-EINVAL); | |
ff764963 KVA |
906 | |
907 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
52797d29 DC |
908 | if (!phy) |
909 | return ERR_PTR(-ENOMEM); | |
ff764963 KVA |
910 | |
911 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); | |
912 | if (id < 0) { | |
913 | dev_err(dev, "unable to get id\n"); | |
914 | ret = id; | |
52797d29 | 915 | goto free_phy; |
ff764963 KVA |
916 | } |
917 | ||
918 | device_initialize(&phy->dev); | |
919 | mutex_init(&phy->mutex); | |
920 | ||
921 | phy->dev.class = phy_class; | |
922 | phy->dev.parent = dev; | |
f0ed8176 | 923 | phy->dev.of_node = node ?: dev->of_node; |
ff764963 KVA |
924 | phy->id = id; |
925 | phy->ops = ops; | |
ff764963 KVA |
926 | |
927 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); | |
928 | if (ret) | |
52797d29 | 929 | goto put_dev; |
ff764963 | 930 | |
87006dd6 DT |
931 | /* phy-supply */ |
932 | phy->pwr = regulator_get_optional(&phy->dev, "phy"); | |
933 | if (IS_ERR(phy->pwr)) { | |
934 | ret = PTR_ERR(phy->pwr); | |
935 | if (ret == -EPROBE_DEFER) | |
936 | goto put_dev; | |
937 | ||
938 | phy->pwr = NULL; | |
939 | } | |
940 | ||
ff764963 KVA |
941 | ret = device_add(&phy->dev); |
942 | if (ret) | |
52797d29 | 943 | goto put_dev; |
ff764963 KVA |
944 | |
945 | if (pm_runtime_enabled(dev)) { | |
946 | pm_runtime_enable(&phy->dev); | |
947 | pm_runtime_no_callbacks(&phy->dev); | |
948 | } | |
949 | ||
950 | return phy; | |
951 | ||
52797d29 | 952 | put_dev: |
e73b49f1 RQ |
953 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
954 | return ERR_PTR(ret); | |
955 | ||
52797d29 | 956 | free_phy: |
ff764963 | 957 | kfree(phy); |
ff764963 KVA |
958 | return ERR_PTR(ret); |
959 | } | |
960 | EXPORT_SYMBOL_GPL(phy_create); | |
961 | ||
962 | /** | |
963 | * devm_phy_create() - create a new phy | |
964 | * @dev: device that is creating the new phy | |
f0ed8176 | 965 | * @node: device node of the phy |
ff764963 | 966 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
967 | * |
968 | * Creates a new PHY device adding it to the PHY class. | |
969 | * While at that, it also associates the device with the phy using devres. | |
970 | * On driver detach, release function is invoked on the devres data, | |
971 | * then, devres data is freed. | |
972 | */ | |
f0ed8176 | 973 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 974 | const struct phy_ops *ops) |
ff764963 KVA |
975 | { |
976 | struct phy **ptr, *phy; | |
977 | ||
978 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); | |
979 | if (!ptr) | |
980 | return ERR_PTR(-ENOMEM); | |
981 | ||
dbc98635 | 982 | phy = phy_create(dev, node, ops); |
ff764963 KVA |
983 | if (!IS_ERR(phy)) { |
984 | *ptr = phy; | |
985 | devres_add(dev, ptr); | |
986 | } else { | |
987 | devres_free(ptr); | |
988 | } | |
989 | ||
990 | return phy; | |
991 | } | |
992 | EXPORT_SYMBOL_GPL(devm_phy_create); | |
993 | ||
994 | /** | |
995 | * phy_destroy() - destroy the phy | |
996 | * @phy: the phy to be destroyed | |
997 | * | |
998 | * Called to destroy the phy. | |
999 | */ | |
1000 | void phy_destroy(struct phy *phy) | |
1001 | { | |
1002 | pm_runtime_disable(&phy->dev); | |
1003 | device_unregister(&phy->dev); | |
1004 | } | |
1005 | EXPORT_SYMBOL_GPL(phy_destroy); | |
1006 | ||
1007 | /** | |
1008 | * devm_phy_destroy() - destroy the PHY | |
1009 | * @dev: device that wants to release this phy | |
1010 | * @phy: the phy returned by devm_phy_get() | |
1011 | * | |
1012 | * destroys the devres associated with this phy and invokes phy_destroy | |
1013 | * to destroy the phy. | |
1014 | */ | |
1015 | void devm_phy_destroy(struct device *dev, struct phy *phy) | |
1016 | { | |
1017 | int r; | |
1018 | ||
1019 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); | |
1020 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
1021 | } | |
1022 | EXPORT_SYMBOL_GPL(devm_phy_destroy); | |
1023 | ||
1024 | /** | |
1025 | * __of_phy_provider_register() - create/register phy provider with the framework | |
1026 | * @dev: struct device of the phy provider | |
1140f7c8 | 1027 | * @children: device node containing children (if different from dev->of_node) |
ff764963 KVA |
1028 | * @owner: the module owner containing of_xlate |
1029 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
1030 | * | |
1031 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
1032 | * This is used in the case of dt boot for finding the phy instance from | |
1033 | * phy provider. | |
1140f7c8 TR |
1034 | * |
1035 | * If the PHY provider doesn't nest children directly but uses a separate | |
1036 | * child node to contain the individual children, the @children parameter | |
1037 | * can be used to override the default. If NULL, the default (dev->of_node) | |
1038 | * will be used. If non-NULL, the device node must be a child (or further | |
1039 | * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL | |
1040 | * error code is returned. | |
ff764963 KVA |
1041 | */ |
1042 | struct phy_provider *__of_phy_provider_register(struct device *dev, | |
1140f7c8 TR |
1043 | struct device_node *children, struct module *owner, |
1044 | struct phy * (*of_xlate)(struct device *dev, | |
1045 | struct of_phandle_args *args)) | |
ff764963 KVA |
1046 | { |
1047 | struct phy_provider *phy_provider; | |
1048 | ||
1140f7c8 TR |
1049 | /* |
1050 | * If specified, the device node containing the children must itself | |
1051 | * be the provider's device node or a child (or further descendant) | |
1052 | * thereof. | |
1053 | */ | |
1054 | if (children) { | |
1055 | struct device_node *parent = of_node_get(children), *next; | |
1056 | ||
1057 | while (parent) { | |
1058 | if (parent == dev->of_node) | |
1059 | break; | |
1060 | ||
1061 | next = of_get_parent(parent); | |
1062 | of_node_put(parent); | |
1063 | parent = next; | |
1064 | } | |
1065 | ||
1066 | if (!parent) | |
1067 | return ERR_PTR(-EINVAL); | |
1068 | ||
1069 | of_node_put(parent); | |
1070 | } else { | |
1071 | children = dev->of_node; | |
1072 | } | |
1073 | ||
ff764963 KVA |
1074 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); |
1075 | if (!phy_provider) | |
1076 | return ERR_PTR(-ENOMEM); | |
1077 | ||
1078 | phy_provider->dev = dev; | |
1140f7c8 | 1079 | phy_provider->children = of_node_get(children); |
ff764963 KVA |
1080 | phy_provider->owner = owner; |
1081 | phy_provider->of_xlate = of_xlate; | |
1082 | ||
1083 | mutex_lock(&phy_provider_mutex); | |
1084 | list_add_tail(&phy_provider->list, &phy_provider_list); | |
1085 | mutex_unlock(&phy_provider_mutex); | |
1086 | ||
1087 | return phy_provider; | |
1088 | } | |
1089 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); | |
1090 | ||
1091 | /** | |
1092 | * __devm_of_phy_provider_register() - create/register phy provider with the | |
1093 | * framework | |
1094 | * @dev: struct device of the phy provider | |
aad075c1 | 1095 | * @children: device node containing children (if different from dev->of_node) |
ff764963 KVA |
1096 | * @owner: the module owner containing of_xlate |
1097 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
1098 | * | |
1099 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
1100 | * This is used in the case of dt boot for finding the phy instance from | |
1101 | * phy provider. While at that, it also associates the device with the | |
1102 | * phy provider using devres. On driver detach, release function is invoked | |
1103 | * on the devres data, then, devres data is freed. | |
1104 | */ | |
1105 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, | |
1140f7c8 TR |
1106 | struct device_node *children, struct module *owner, |
1107 | struct phy * (*of_xlate)(struct device *dev, | |
1108 | struct of_phandle_args *args)) | |
ff764963 KVA |
1109 | { |
1110 | struct phy_provider **ptr, *phy_provider; | |
1111 | ||
1112 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); | |
1113 | if (!ptr) | |
1114 | return ERR_PTR(-ENOMEM); | |
1115 | ||
1140f7c8 TR |
1116 | phy_provider = __of_phy_provider_register(dev, children, owner, |
1117 | of_xlate); | |
ff764963 KVA |
1118 | if (!IS_ERR(phy_provider)) { |
1119 | *ptr = phy_provider; | |
1120 | devres_add(dev, ptr); | |
1121 | } else { | |
1122 | devres_free(ptr); | |
1123 | } | |
1124 | ||
1125 | return phy_provider; | |
1126 | } | |
1127 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); | |
1128 | ||
1129 | /** | |
1130 | * of_phy_provider_unregister() - unregister phy provider from the framework | |
1131 | * @phy_provider: phy provider returned by of_phy_provider_register() | |
1132 | * | |
1133 | * Removes the phy_provider created using of_phy_provider_register(). | |
1134 | */ | |
1135 | void of_phy_provider_unregister(struct phy_provider *phy_provider) | |
1136 | { | |
1137 | if (IS_ERR(phy_provider)) | |
1138 | return; | |
1139 | ||
1140 | mutex_lock(&phy_provider_mutex); | |
1141 | list_del(&phy_provider->list); | |
1140f7c8 | 1142 | of_node_put(phy_provider->children); |
ff764963 KVA |
1143 | kfree(phy_provider); |
1144 | mutex_unlock(&phy_provider_mutex); | |
1145 | } | |
1146 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); | |
1147 | ||
1148 | /** | |
1149 | * devm_of_phy_provider_unregister() - remove phy provider from the framework | |
1150 | * @dev: struct device of the phy provider | |
aad075c1 | 1151 | * @phy_provider: phy provider returned by of_phy_provider_register() |
ff764963 KVA |
1152 | * |
1153 | * destroys the devres associated with this phy provider and invokes | |
1154 | * of_phy_provider_unregister to unregister the phy provider. | |
1155 | */ | |
1156 | void devm_of_phy_provider_unregister(struct device *dev, | |
b555f35f VK |
1157 | struct phy_provider *phy_provider) |
1158 | { | |
ff764963 KVA |
1159 | int r; |
1160 | ||
1161 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, | |
1162 | phy_provider); | |
1163 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); | |
1164 | } | |
1165 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); | |
1166 | ||
1167 | /** | |
1168 | * phy_release() - release the phy | |
1169 | * @dev: the dev member within phy | |
1170 | * | |
1171 | * When the last reference to the device is removed, it is called | |
1172 | * from the embedded kobject as release method. | |
1173 | */ | |
1174 | static void phy_release(struct device *dev) | |
1175 | { | |
1176 | struct phy *phy; | |
1177 | ||
1178 | phy = to_phy(dev); | |
1179 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); | |
3be88125 | 1180 | regulator_put(phy->pwr); |
e73b49f1 | 1181 | ida_simple_remove(&phy_ida, phy->id); |
ff764963 KVA |
1182 | kfree(phy); |
1183 | } | |
1184 | ||
1185 | static int __init phy_core_init(void) | |
1186 | { | |
1187 | phy_class = class_create(THIS_MODULE, "phy"); | |
1188 | if (IS_ERR(phy_class)) { | |
1189 | pr_err("failed to create phy class --> %ld\n", | |
1190 | PTR_ERR(phy_class)); | |
1191 | return PTR_ERR(phy_class); | |
1192 | } | |
1193 | ||
1194 | phy_class->dev_release = phy_release; | |
1195 | ||
1196 | return 0; | |
1197 | } | |
cc013c28 | 1198 | device_initcall(phy_core_init); |