Commit | Line | Data |
---|---|---|
ff764963 KVA |
1 | /* |
2 | * phy-core.c -- Generic Phy framework. | |
3 | * | |
4 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com | |
5 | * | |
6 | * Author: Kishon Vijay Abraham I <kishon@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/export.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/of.h> | |
21 | #include <linux/phy/phy.h> | |
22 | #include <linux/idr.h> | |
23 | #include <linux/pm_runtime.h> | |
24 | ||
25 | static struct class *phy_class; | |
26 | static DEFINE_MUTEX(phy_provider_mutex); | |
27 | static LIST_HEAD(phy_provider_list); | |
28 | static DEFINE_IDA(phy_ida); | |
29 | ||
30 | static void devm_phy_release(struct device *dev, void *res) | |
31 | { | |
32 | struct phy *phy = *(struct phy **)res; | |
33 | ||
34 | phy_put(phy); | |
35 | } | |
36 | ||
37 | static void devm_phy_provider_release(struct device *dev, void *res) | |
38 | { | |
39 | struct phy_provider *phy_provider = *(struct phy_provider **)res; | |
40 | ||
41 | of_phy_provider_unregister(phy_provider); | |
42 | } | |
43 | ||
44 | static void devm_phy_consume(struct device *dev, void *res) | |
45 | { | |
46 | struct phy *phy = *(struct phy **)res; | |
47 | ||
48 | phy_destroy(phy); | |
49 | } | |
50 | ||
51 | static int devm_phy_match(struct device *dev, void *res, void *match_data) | |
52 | { | |
53 | return res == match_data; | |
54 | } | |
55 | ||
56 | static struct phy *phy_lookup(struct device *device, const char *port) | |
57 | { | |
58 | unsigned int count; | |
59 | struct phy *phy; | |
60 | struct device *dev; | |
61 | struct phy_consumer *consumers; | |
62 | struct class_dev_iter iter; | |
63 | ||
64 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
65 | while ((dev = class_dev_iter_next(&iter))) { | |
66 | phy = to_phy(dev); | |
67 | count = phy->init_data->num_consumers; | |
68 | consumers = phy->init_data->consumers; | |
69 | while (count--) { | |
70 | if (!strcmp(consumers->dev_name, dev_name(device)) && | |
71 | !strcmp(consumers->port, port)) { | |
72 | class_dev_iter_exit(&iter); | |
73 | return phy; | |
74 | } | |
75 | consumers++; | |
76 | } | |
77 | } | |
78 | ||
79 | class_dev_iter_exit(&iter); | |
80 | return ERR_PTR(-ENODEV); | |
81 | } | |
82 | ||
83 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) | |
84 | { | |
85 | struct phy_provider *phy_provider; | |
86 | ||
87 | list_for_each_entry(phy_provider, &phy_provider_list, list) { | |
88 | if (phy_provider->dev->of_node == node) | |
89 | return phy_provider; | |
90 | } | |
91 | ||
92 | return ERR_PTR(-EPROBE_DEFER); | |
93 | } | |
94 | ||
95 | int phy_pm_runtime_get(struct phy *phy) | |
96 | { | |
97 | if (!pm_runtime_enabled(&phy->dev)) | |
98 | return -ENOTSUPP; | |
99 | ||
100 | return pm_runtime_get(&phy->dev); | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); | |
103 | ||
104 | int phy_pm_runtime_get_sync(struct phy *phy) | |
105 | { | |
106 | if (!pm_runtime_enabled(&phy->dev)) | |
107 | return -ENOTSUPP; | |
108 | ||
109 | return pm_runtime_get_sync(&phy->dev); | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); | |
112 | ||
113 | int phy_pm_runtime_put(struct phy *phy) | |
114 | { | |
115 | if (!pm_runtime_enabled(&phy->dev)) | |
116 | return -ENOTSUPP; | |
117 | ||
118 | return pm_runtime_put(&phy->dev); | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); | |
121 | ||
122 | int phy_pm_runtime_put_sync(struct phy *phy) | |
123 | { | |
124 | if (!pm_runtime_enabled(&phy->dev)) | |
125 | return -ENOTSUPP; | |
126 | ||
127 | return pm_runtime_put_sync(&phy->dev); | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); | |
130 | ||
131 | void phy_pm_runtime_allow(struct phy *phy) | |
132 | { | |
133 | if (!pm_runtime_enabled(&phy->dev)) | |
134 | return; | |
135 | ||
136 | pm_runtime_allow(&phy->dev); | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); | |
139 | ||
140 | void phy_pm_runtime_forbid(struct phy *phy) | |
141 | { | |
142 | if (!pm_runtime_enabled(&phy->dev)) | |
143 | return; | |
144 | ||
145 | pm_runtime_forbid(&phy->dev); | |
146 | } | |
147 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); | |
148 | ||
149 | int phy_init(struct phy *phy) | |
150 | { | |
151 | int ret; | |
152 | ||
153 | ret = phy_pm_runtime_get_sync(phy); | |
154 | if (ret < 0 && ret != -ENOTSUPP) | |
155 | return ret; | |
156 | ||
157 | mutex_lock(&phy->mutex); | |
158 | if (phy->init_count++ == 0 && phy->ops->init) { | |
159 | ret = phy->ops->init(phy); | |
160 | if (ret < 0) { | |
161 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); | |
162 | goto out; | |
163 | } | |
164 | } | |
165 | ||
166 | out: | |
167 | mutex_unlock(&phy->mutex); | |
168 | phy_pm_runtime_put(phy); | |
169 | return ret; | |
170 | } | |
171 | EXPORT_SYMBOL_GPL(phy_init); | |
172 | ||
173 | int phy_exit(struct phy *phy) | |
174 | { | |
175 | int ret; | |
176 | ||
177 | ret = phy_pm_runtime_get_sync(phy); | |
178 | if (ret < 0 && ret != -ENOTSUPP) | |
179 | return ret; | |
180 | ||
181 | mutex_lock(&phy->mutex); | |
182 | if (--phy->init_count == 0 && phy->ops->exit) { | |
183 | ret = phy->ops->exit(phy); | |
184 | if (ret < 0) { | |
185 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); | |
186 | goto out; | |
187 | } | |
188 | } | |
189 | ||
190 | out: | |
191 | mutex_unlock(&phy->mutex); | |
192 | phy_pm_runtime_put(phy); | |
193 | return ret; | |
194 | } | |
195 | EXPORT_SYMBOL_GPL(phy_exit); | |
196 | ||
197 | int phy_power_on(struct phy *phy) | |
198 | { | |
199 | int ret = -ENOTSUPP; | |
200 | ||
201 | ret = phy_pm_runtime_get_sync(phy); | |
202 | if (ret < 0 && ret != -ENOTSUPP) | |
203 | return ret; | |
204 | ||
205 | mutex_lock(&phy->mutex); | |
206 | if (phy->power_count++ == 0 && phy->ops->power_on) { | |
207 | ret = phy->ops->power_on(phy); | |
208 | if (ret < 0) { | |
209 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); | |
210 | goto out; | |
211 | } | |
212 | } | |
213 | ||
214 | out: | |
215 | mutex_unlock(&phy->mutex); | |
216 | ||
217 | return ret; | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(phy_power_on); | |
220 | ||
221 | int phy_power_off(struct phy *phy) | |
222 | { | |
223 | int ret = -ENOTSUPP; | |
224 | ||
225 | mutex_lock(&phy->mutex); | |
226 | if (--phy->power_count == 0 && phy->ops->power_off) { | |
227 | ret = phy->ops->power_off(phy); | |
228 | if (ret < 0) { | |
229 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); | |
230 | goto out; | |
231 | } | |
232 | } | |
233 | ||
234 | out: | |
235 | mutex_unlock(&phy->mutex); | |
236 | phy_pm_runtime_put(phy); | |
237 | ||
238 | return ret; | |
239 | } | |
240 | EXPORT_SYMBOL_GPL(phy_power_off); | |
241 | ||
242 | /** | |
243 | * of_phy_get() - lookup and obtain a reference to a phy by phandle | |
244 | * @dev: device that requests this phy | |
245 | * @index: the index of the phy | |
246 | * | |
247 | * Returns the phy associated with the given phandle value, | |
248 | * after getting a refcount to it or -ENODEV if there is no such phy or | |
249 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is | |
250 | * not yet loaded. This function uses of_xlate call back function provided | |
251 | * while registering the phy_provider to find the phy instance. | |
252 | */ | |
253 | static struct phy *of_phy_get(struct device *dev, int index) | |
254 | { | |
255 | int ret; | |
256 | struct phy_provider *phy_provider; | |
257 | struct phy *phy = NULL; | |
258 | struct of_phandle_args args; | |
259 | ||
260 | ret = of_parse_phandle_with_args(dev->of_node, "phys", "#phy-cells", | |
261 | index, &args); | |
262 | if (ret) { | |
263 | dev_dbg(dev, "failed to get phy in %s node\n", | |
264 | dev->of_node->full_name); | |
265 | return ERR_PTR(-ENODEV); | |
266 | } | |
267 | ||
268 | mutex_lock(&phy_provider_mutex); | |
269 | phy_provider = of_phy_provider_lookup(args.np); | |
270 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { | |
271 | phy = ERR_PTR(-EPROBE_DEFER); | |
272 | goto err0; | |
273 | } | |
274 | ||
275 | phy = phy_provider->of_xlate(phy_provider->dev, &args); | |
276 | module_put(phy_provider->owner); | |
277 | ||
278 | err0: | |
279 | mutex_unlock(&phy_provider_mutex); | |
280 | of_node_put(args.np); | |
281 | ||
282 | return phy; | |
283 | } | |
284 | ||
285 | /** | |
286 | * phy_put() - release the PHY | |
287 | * @phy: the phy returned by phy_get() | |
288 | * | |
289 | * Releases a refcount the caller received from phy_get(). | |
290 | */ | |
291 | void phy_put(struct phy *phy) | |
292 | { | |
293 | if (IS_ERR(phy)) | |
294 | return; | |
295 | ||
296 | module_put(phy->ops->owner); | |
297 | put_device(&phy->dev); | |
298 | } | |
299 | EXPORT_SYMBOL_GPL(phy_put); | |
300 | ||
301 | /** | |
302 | * devm_phy_put() - release the PHY | |
303 | * @dev: device that wants to release this phy | |
304 | * @phy: the phy returned by devm_phy_get() | |
305 | * | |
306 | * destroys the devres associated with this phy and invokes phy_put | |
307 | * to release the phy. | |
308 | */ | |
309 | void devm_phy_put(struct device *dev, struct phy *phy) | |
310 | { | |
311 | int r; | |
312 | ||
313 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); | |
314 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(devm_phy_put); | |
317 | ||
318 | /** | |
319 | * of_phy_simple_xlate() - returns the phy instance from phy provider | |
320 | * @dev: the PHY provider device | |
321 | * @args: of_phandle_args (not used here) | |
322 | * | |
323 | * Intended to be used by phy provider for the common case where #phy-cells is | |
324 | * 0. For other cases where #phy-cells is greater than '0', the phy provider | |
325 | * should provide a custom of_xlate function that reads the *args* and returns | |
326 | * the appropriate phy. | |
327 | */ | |
328 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args | |
329 | *args) | |
330 | { | |
331 | struct phy *phy; | |
332 | struct class_dev_iter iter; | |
333 | struct device_node *node = dev->of_node; | |
334 | ||
335 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
336 | while ((dev = class_dev_iter_next(&iter))) { | |
337 | phy = to_phy(dev); | |
338 | if (node != phy->dev.of_node) | |
339 | continue; | |
340 | ||
341 | class_dev_iter_exit(&iter); | |
342 | return phy; | |
343 | } | |
344 | ||
345 | class_dev_iter_exit(&iter); | |
346 | return ERR_PTR(-ENODEV); | |
347 | } | |
348 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); | |
349 | ||
350 | /** | |
351 | * phy_get() - lookup and obtain a reference to a phy. | |
352 | * @dev: device that requests this phy | |
353 | * @string: the phy name as given in the dt data or the name of the controller | |
354 | * port for non-dt case | |
355 | * | |
356 | * Returns the phy driver, after getting a refcount to it; or | |
357 | * -ENODEV if there is no such phy. The caller is responsible for | |
358 | * calling phy_put() to release that count. | |
359 | */ | |
360 | struct phy *phy_get(struct device *dev, const char *string) | |
361 | { | |
362 | int index = 0; | |
363 | struct phy *phy = NULL; | |
364 | ||
365 | if (string == NULL) { | |
366 | dev_WARN(dev, "missing string\n"); | |
367 | return ERR_PTR(-EINVAL); | |
368 | } | |
369 | ||
370 | if (dev->of_node) { | |
371 | index = of_property_match_string(dev->of_node, "phy-names", | |
372 | string); | |
373 | phy = of_phy_get(dev, index); | |
374 | if (IS_ERR(phy)) { | |
375 | dev_err(dev, "unable to find phy\n"); | |
376 | return phy; | |
377 | } | |
378 | } else { | |
379 | phy = phy_lookup(dev, string); | |
380 | if (IS_ERR(phy)) { | |
381 | dev_err(dev, "unable to find phy\n"); | |
382 | return phy; | |
383 | } | |
384 | } | |
385 | ||
386 | if (!try_module_get(phy->ops->owner)) | |
387 | return ERR_PTR(-EPROBE_DEFER); | |
388 | ||
389 | get_device(&phy->dev); | |
390 | ||
391 | return phy; | |
392 | } | |
393 | EXPORT_SYMBOL_GPL(phy_get); | |
394 | ||
395 | /** | |
396 | * devm_phy_get() - lookup and obtain a reference to a phy. | |
397 | * @dev: device that requests this phy | |
398 | * @string: the phy name as given in the dt data or phy device name | |
399 | * for non-dt case | |
400 | * | |
401 | * Gets the phy using phy_get(), and associates a device with it using | |
402 | * devres. On driver detach, release function is invoked on the devres data, | |
403 | * then, devres data is freed. | |
404 | */ | |
405 | struct phy *devm_phy_get(struct device *dev, const char *string) | |
406 | { | |
407 | struct phy **ptr, *phy; | |
408 | ||
409 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
410 | if (!ptr) | |
411 | return ERR_PTR(-ENOMEM); | |
412 | ||
413 | phy = phy_get(dev, string); | |
414 | if (!IS_ERR(phy)) { | |
415 | *ptr = phy; | |
416 | devres_add(dev, ptr); | |
417 | } else { | |
418 | devres_free(ptr); | |
419 | } | |
420 | ||
421 | return phy; | |
422 | } | |
423 | EXPORT_SYMBOL_GPL(devm_phy_get); | |
424 | ||
425 | /** | |
426 | * phy_create() - create a new phy | |
427 | * @dev: device that is creating the new phy | |
428 | * @ops: function pointers for performing phy operations | |
429 | * @init_data: contains the list of PHY consumers or NULL | |
430 | * | |
431 | * Called to create a phy using phy framework. | |
432 | */ | |
433 | struct phy *phy_create(struct device *dev, const struct phy_ops *ops, | |
434 | struct phy_init_data *init_data) | |
435 | { | |
436 | int ret; | |
437 | int id; | |
438 | struct phy *phy; | |
439 | ||
440 | if (!dev) { | |
441 | dev_WARN(dev, "no device provided for PHY\n"); | |
442 | ret = -EINVAL; | |
443 | goto err0; | |
444 | } | |
445 | ||
446 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
447 | if (!phy) { | |
448 | ret = -ENOMEM; | |
449 | goto err0; | |
450 | } | |
451 | ||
452 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); | |
453 | if (id < 0) { | |
454 | dev_err(dev, "unable to get id\n"); | |
455 | ret = id; | |
456 | goto err0; | |
457 | } | |
458 | ||
459 | device_initialize(&phy->dev); | |
460 | mutex_init(&phy->mutex); | |
461 | ||
462 | phy->dev.class = phy_class; | |
463 | phy->dev.parent = dev; | |
464 | phy->dev.of_node = dev->of_node; | |
465 | phy->id = id; | |
466 | phy->ops = ops; | |
467 | phy->init_data = init_data; | |
468 | ||
469 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); | |
470 | if (ret) | |
471 | goto err1; | |
472 | ||
473 | ret = device_add(&phy->dev); | |
474 | if (ret) | |
475 | goto err1; | |
476 | ||
477 | if (pm_runtime_enabled(dev)) { | |
478 | pm_runtime_enable(&phy->dev); | |
479 | pm_runtime_no_callbacks(&phy->dev); | |
480 | } | |
481 | ||
482 | return phy; | |
483 | ||
484 | err1: | |
485 | ida_remove(&phy_ida, phy->id); | |
486 | put_device(&phy->dev); | |
487 | kfree(phy); | |
488 | ||
489 | err0: | |
490 | return ERR_PTR(ret); | |
491 | } | |
492 | EXPORT_SYMBOL_GPL(phy_create); | |
493 | ||
494 | /** | |
495 | * devm_phy_create() - create a new phy | |
496 | * @dev: device that is creating the new phy | |
497 | * @ops: function pointers for performing phy operations | |
498 | * @init_data: contains the list of PHY consumers or NULL | |
499 | * | |
500 | * Creates a new PHY device adding it to the PHY class. | |
501 | * While at that, it also associates the device with the phy using devres. | |
502 | * On driver detach, release function is invoked on the devres data, | |
503 | * then, devres data is freed. | |
504 | */ | |
505 | struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops, | |
506 | struct phy_init_data *init_data) | |
507 | { | |
508 | struct phy **ptr, *phy; | |
509 | ||
510 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); | |
511 | if (!ptr) | |
512 | return ERR_PTR(-ENOMEM); | |
513 | ||
514 | phy = phy_create(dev, ops, init_data); | |
515 | if (!IS_ERR(phy)) { | |
516 | *ptr = phy; | |
517 | devres_add(dev, ptr); | |
518 | } else { | |
519 | devres_free(ptr); | |
520 | } | |
521 | ||
522 | return phy; | |
523 | } | |
524 | EXPORT_SYMBOL_GPL(devm_phy_create); | |
525 | ||
526 | /** | |
527 | * phy_destroy() - destroy the phy | |
528 | * @phy: the phy to be destroyed | |
529 | * | |
530 | * Called to destroy the phy. | |
531 | */ | |
532 | void phy_destroy(struct phy *phy) | |
533 | { | |
534 | pm_runtime_disable(&phy->dev); | |
535 | device_unregister(&phy->dev); | |
536 | } | |
537 | EXPORT_SYMBOL_GPL(phy_destroy); | |
538 | ||
539 | /** | |
540 | * devm_phy_destroy() - destroy the PHY | |
541 | * @dev: device that wants to release this phy | |
542 | * @phy: the phy returned by devm_phy_get() | |
543 | * | |
544 | * destroys the devres associated with this phy and invokes phy_destroy | |
545 | * to destroy the phy. | |
546 | */ | |
547 | void devm_phy_destroy(struct device *dev, struct phy *phy) | |
548 | { | |
549 | int r; | |
550 | ||
551 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); | |
552 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
553 | } | |
554 | EXPORT_SYMBOL_GPL(devm_phy_destroy); | |
555 | ||
556 | /** | |
557 | * __of_phy_provider_register() - create/register phy provider with the framework | |
558 | * @dev: struct device of the phy provider | |
559 | * @owner: the module owner containing of_xlate | |
560 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
561 | * | |
562 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
563 | * This is used in the case of dt boot for finding the phy instance from | |
564 | * phy provider. | |
565 | */ | |
566 | struct phy_provider *__of_phy_provider_register(struct device *dev, | |
567 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
568 | struct of_phandle_args *args)) | |
569 | { | |
570 | struct phy_provider *phy_provider; | |
571 | ||
572 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); | |
573 | if (!phy_provider) | |
574 | return ERR_PTR(-ENOMEM); | |
575 | ||
576 | phy_provider->dev = dev; | |
577 | phy_provider->owner = owner; | |
578 | phy_provider->of_xlate = of_xlate; | |
579 | ||
580 | mutex_lock(&phy_provider_mutex); | |
581 | list_add_tail(&phy_provider->list, &phy_provider_list); | |
582 | mutex_unlock(&phy_provider_mutex); | |
583 | ||
584 | return phy_provider; | |
585 | } | |
586 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); | |
587 | ||
588 | /** | |
589 | * __devm_of_phy_provider_register() - create/register phy provider with the | |
590 | * framework | |
591 | * @dev: struct device of the phy provider | |
592 | * @owner: the module owner containing of_xlate | |
593 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
594 | * | |
595 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
596 | * This is used in the case of dt boot for finding the phy instance from | |
597 | * phy provider. While at that, it also associates the device with the | |
598 | * phy provider using devres. On driver detach, release function is invoked | |
599 | * on the devres data, then, devres data is freed. | |
600 | */ | |
601 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, | |
602 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
603 | struct of_phandle_args *args)) | |
604 | { | |
605 | struct phy_provider **ptr, *phy_provider; | |
606 | ||
607 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); | |
608 | if (!ptr) | |
609 | return ERR_PTR(-ENOMEM); | |
610 | ||
611 | phy_provider = __of_phy_provider_register(dev, owner, of_xlate); | |
612 | if (!IS_ERR(phy_provider)) { | |
613 | *ptr = phy_provider; | |
614 | devres_add(dev, ptr); | |
615 | } else { | |
616 | devres_free(ptr); | |
617 | } | |
618 | ||
619 | return phy_provider; | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); | |
622 | ||
623 | /** | |
624 | * of_phy_provider_unregister() - unregister phy provider from the framework | |
625 | * @phy_provider: phy provider returned by of_phy_provider_register() | |
626 | * | |
627 | * Removes the phy_provider created using of_phy_provider_register(). | |
628 | */ | |
629 | void of_phy_provider_unregister(struct phy_provider *phy_provider) | |
630 | { | |
631 | if (IS_ERR(phy_provider)) | |
632 | return; | |
633 | ||
634 | mutex_lock(&phy_provider_mutex); | |
635 | list_del(&phy_provider->list); | |
636 | kfree(phy_provider); | |
637 | mutex_unlock(&phy_provider_mutex); | |
638 | } | |
639 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); | |
640 | ||
641 | /** | |
642 | * devm_of_phy_provider_unregister() - remove phy provider from the framework | |
643 | * @dev: struct device of the phy provider | |
644 | * | |
645 | * destroys the devres associated with this phy provider and invokes | |
646 | * of_phy_provider_unregister to unregister the phy provider. | |
647 | */ | |
648 | void devm_of_phy_provider_unregister(struct device *dev, | |
649 | struct phy_provider *phy_provider) { | |
650 | int r; | |
651 | ||
652 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, | |
653 | phy_provider); | |
654 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); | |
655 | } | |
656 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); | |
657 | ||
658 | /** | |
659 | * phy_release() - release the phy | |
660 | * @dev: the dev member within phy | |
661 | * | |
662 | * When the last reference to the device is removed, it is called | |
663 | * from the embedded kobject as release method. | |
664 | */ | |
665 | static void phy_release(struct device *dev) | |
666 | { | |
667 | struct phy *phy; | |
668 | ||
669 | phy = to_phy(dev); | |
670 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); | |
671 | ida_remove(&phy_ida, phy->id); | |
672 | kfree(phy); | |
673 | } | |
674 | ||
675 | static int __init phy_core_init(void) | |
676 | { | |
677 | phy_class = class_create(THIS_MODULE, "phy"); | |
678 | if (IS_ERR(phy_class)) { | |
679 | pr_err("failed to create phy class --> %ld\n", | |
680 | PTR_ERR(phy_class)); | |
681 | return PTR_ERR(phy_class); | |
682 | } | |
683 | ||
684 | phy_class->dev_release = phy_release; | |
685 | ||
686 | return 0; | |
687 | } | |
688 | module_init(phy_core_init); | |
689 | ||
690 | static void __exit phy_core_exit(void) | |
691 | { | |
692 | class_destroy(phy_class); | |
693 | } | |
694 | module_exit(phy_core_exit); | |
695 | ||
696 | MODULE_DESCRIPTION("Generic PHY Framework"); | |
697 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); | |
698 | MODULE_LICENSE("GPL v2"); |