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); | |
743bb387 SS |
67 | |
68 | if (!phy->init_data) | |
69 | continue; | |
ff764963 KVA |
70 | count = phy->init_data->num_consumers; |
71 | consumers = phy->init_data->consumers; | |
72 | while (count--) { | |
73 | if (!strcmp(consumers->dev_name, dev_name(device)) && | |
74 | !strcmp(consumers->port, port)) { | |
75 | class_dev_iter_exit(&iter); | |
76 | return phy; | |
77 | } | |
78 | consumers++; | |
79 | } | |
80 | } | |
81 | ||
82 | class_dev_iter_exit(&iter); | |
83 | return ERR_PTR(-ENODEV); | |
84 | } | |
85 | ||
86 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) | |
87 | { | |
88 | struct phy_provider *phy_provider; | |
89 | ||
90 | list_for_each_entry(phy_provider, &phy_provider_list, list) { | |
91 | if (phy_provider->dev->of_node == node) | |
92 | return phy_provider; | |
93 | } | |
94 | ||
95 | return ERR_PTR(-EPROBE_DEFER); | |
96 | } | |
97 | ||
98 | int phy_pm_runtime_get(struct phy *phy) | |
99 | { | |
cedb7f89 FB |
100 | int ret; |
101 | ||
ff764963 KVA |
102 | if (!pm_runtime_enabled(&phy->dev)) |
103 | return -ENOTSUPP; | |
104 | ||
cedb7f89 FB |
105 | ret = pm_runtime_get(&phy->dev); |
106 | if (ret < 0 && ret != -EINPROGRESS) | |
107 | pm_runtime_put_noidle(&phy->dev); | |
108 | ||
109 | return ret; | |
ff764963 KVA |
110 | } |
111 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); | |
112 | ||
113 | int phy_pm_runtime_get_sync(struct phy *phy) | |
114 | { | |
cedb7f89 FB |
115 | int ret; |
116 | ||
ff764963 KVA |
117 | if (!pm_runtime_enabled(&phy->dev)) |
118 | return -ENOTSUPP; | |
119 | ||
cedb7f89 FB |
120 | ret = pm_runtime_get_sync(&phy->dev); |
121 | if (ret < 0) | |
122 | pm_runtime_put_sync(&phy->dev); | |
123 | ||
124 | return ret; | |
ff764963 KVA |
125 | } |
126 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); | |
127 | ||
128 | int phy_pm_runtime_put(struct phy *phy) | |
129 | { | |
130 | if (!pm_runtime_enabled(&phy->dev)) | |
131 | return -ENOTSUPP; | |
132 | ||
133 | return pm_runtime_put(&phy->dev); | |
134 | } | |
135 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); | |
136 | ||
137 | int phy_pm_runtime_put_sync(struct phy *phy) | |
138 | { | |
139 | if (!pm_runtime_enabled(&phy->dev)) | |
140 | return -ENOTSUPP; | |
141 | ||
142 | return pm_runtime_put_sync(&phy->dev); | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); | |
145 | ||
146 | void phy_pm_runtime_allow(struct phy *phy) | |
147 | { | |
148 | if (!pm_runtime_enabled(&phy->dev)) | |
149 | return; | |
150 | ||
151 | pm_runtime_allow(&phy->dev); | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); | |
154 | ||
155 | void phy_pm_runtime_forbid(struct phy *phy) | |
156 | { | |
157 | if (!pm_runtime_enabled(&phy->dev)) | |
158 | return; | |
159 | ||
160 | pm_runtime_forbid(&phy->dev); | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); | |
163 | ||
164 | int phy_init(struct phy *phy) | |
165 | { | |
166 | int ret; | |
167 | ||
04c2faca AL |
168 | if (!phy) |
169 | return 0; | |
170 | ||
ff764963 KVA |
171 | ret = phy_pm_runtime_get_sync(phy); |
172 | if (ret < 0 && ret != -ENOTSUPP) | |
173 | return ret; | |
174 | ||
175 | mutex_lock(&phy->mutex); | |
637d378c | 176 | if (phy->init_count == 0 && phy->ops->init) { |
ff764963 KVA |
177 | ret = phy->ops->init(phy); |
178 | if (ret < 0) { | |
179 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); | |
180 | goto out; | |
181 | } | |
767a1b5d HG |
182 | } else { |
183 | ret = 0; /* Override possible ret == -ENOTSUPP */ | |
ff764963 | 184 | } |
637d378c | 185 | ++phy->init_count; |
ff764963 KVA |
186 | |
187 | out: | |
188 | mutex_unlock(&phy->mutex); | |
189 | phy_pm_runtime_put(phy); | |
190 | return ret; | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(phy_init); | |
193 | ||
194 | int phy_exit(struct phy *phy) | |
195 | { | |
196 | int ret; | |
197 | ||
04c2faca AL |
198 | if (!phy) |
199 | return 0; | |
200 | ||
ff764963 KVA |
201 | ret = phy_pm_runtime_get_sync(phy); |
202 | if (ret < 0 && ret != -ENOTSUPP) | |
203 | return ret; | |
204 | ||
205 | mutex_lock(&phy->mutex); | |
637d378c | 206 | if (phy->init_count == 1 && phy->ops->exit) { |
ff764963 KVA |
207 | ret = phy->ops->exit(phy); |
208 | if (ret < 0) { | |
209 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); | |
210 | goto out; | |
211 | } | |
212 | } | |
637d378c | 213 | --phy->init_count; |
ff764963 KVA |
214 | |
215 | out: | |
216 | mutex_unlock(&phy->mutex); | |
217 | phy_pm_runtime_put(phy); | |
218 | return ret; | |
219 | } | |
220 | EXPORT_SYMBOL_GPL(phy_exit); | |
221 | ||
222 | int phy_power_on(struct phy *phy) | |
223 | { | |
d18c9604 | 224 | int ret; |
ff764963 | 225 | |
04c2faca AL |
226 | if (!phy) |
227 | return 0; | |
228 | ||
ff764963 KVA |
229 | ret = phy_pm_runtime_get_sync(phy); |
230 | if (ret < 0 && ret != -ENOTSUPP) | |
231 | return ret; | |
232 | ||
233 | mutex_lock(&phy->mutex); | |
637d378c | 234 | if (phy->power_count == 0 && phy->ops->power_on) { |
ff764963 KVA |
235 | ret = phy->ops->power_on(phy); |
236 | if (ret < 0) { | |
237 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); | |
238 | goto out; | |
239 | } | |
767a1b5d HG |
240 | } else { |
241 | ret = 0; /* Override possible ret == -ENOTSUPP */ | |
ff764963 | 242 | } |
637d378c KVA |
243 | ++phy->power_count; |
244 | mutex_unlock(&phy->mutex); | |
245 | return 0; | |
ff764963 KVA |
246 | |
247 | out: | |
248 | mutex_unlock(&phy->mutex); | |
637d378c | 249 | phy_pm_runtime_put_sync(phy); |
ff764963 KVA |
250 | |
251 | return ret; | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(phy_power_on); | |
254 | ||
255 | int phy_power_off(struct phy *phy) | |
256 | { | |
d18c9604 | 257 | int ret; |
ff764963 | 258 | |
04c2faca AL |
259 | if (!phy) |
260 | return 0; | |
261 | ||
ff764963 | 262 | mutex_lock(&phy->mutex); |
637d378c | 263 | if (phy->power_count == 1 && phy->ops->power_off) { |
ff764963 KVA |
264 | ret = phy->ops->power_off(phy); |
265 | if (ret < 0) { | |
266 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); | |
637d378c KVA |
267 | mutex_unlock(&phy->mutex); |
268 | return ret; | |
ff764963 KVA |
269 | } |
270 | } | |
637d378c | 271 | --phy->power_count; |
ff764963 KVA |
272 | mutex_unlock(&phy->mutex); |
273 | phy_pm_runtime_put(phy); | |
274 | ||
637d378c | 275 | return 0; |
ff764963 KVA |
276 | } |
277 | EXPORT_SYMBOL_GPL(phy_power_off); | |
278 | ||
279 | /** | |
0b3f3b2c KD |
280 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
281 | * @np: device_node for which to get the phy | |
ff764963 KVA |
282 | * @index: the index of the phy |
283 | * | |
284 | * Returns the phy associated with the given phandle value, | |
285 | * after getting a refcount to it or -ENODEV if there is no such phy or | |
286 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is | |
287 | * not yet loaded. This function uses of_xlate call back function provided | |
288 | * while registering the phy_provider to find the phy instance. | |
289 | */ | |
0b3f3b2c | 290 | static struct phy *_of_phy_get(struct device_node *np, int index) |
ff764963 KVA |
291 | { |
292 | int ret; | |
293 | struct phy_provider *phy_provider; | |
294 | struct phy *phy = NULL; | |
295 | struct of_phandle_args args; | |
296 | ||
0b3f3b2c | 297 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
ff764963 | 298 | index, &args); |
0b3f3b2c | 299 | if (ret) |
ff764963 | 300 | return ERR_PTR(-ENODEV); |
ff764963 KVA |
301 | |
302 | mutex_lock(&phy_provider_mutex); | |
303 | phy_provider = of_phy_provider_lookup(args.np); | |
304 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { | |
305 | phy = ERR_PTR(-EPROBE_DEFER); | |
306 | goto err0; | |
307 | } | |
308 | ||
309 | phy = phy_provider->of_xlate(phy_provider->dev, &args); | |
310 | module_put(phy_provider->owner); | |
311 | ||
312 | err0: | |
313 | mutex_unlock(&phy_provider_mutex); | |
314 | of_node_put(args.np); | |
315 | ||
316 | return phy; | |
317 | } | |
318 | ||
0b3f3b2c KD |
319 | /** |
320 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. | |
321 | * @np: device_node for which to get the phy | |
322 | * @con_id: name of the phy from device's point of view | |
323 | * | |
324 | * Returns the phy driver, after getting a refcount to it; or | |
325 | * -ENODEV if there is no such phy. The caller is responsible for | |
326 | * calling phy_put() to release that count. | |
327 | */ | |
328 | struct phy *of_phy_get(struct device_node *np, const char *con_id) | |
329 | { | |
330 | struct phy *phy = NULL; | |
331 | int index = 0; | |
332 | ||
333 | if (con_id) | |
334 | index = of_property_match_string(np, "phy-names", con_id); | |
335 | ||
336 | phy = _of_phy_get(np, index); | |
337 | if (IS_ERR(phy)) | |
338 | return phy; | |
339 | ||
340 | if (!try_module_get(phy->ops->owner)) | |
341 | return ERR_PTR(-EPROBE_DEFER); | |
342 | ||
343 | get_device(&phy->dev); | |
344 | ||
345 | return phy; | |
346 | } | |
347 | EXPORT_SYMBOL_GPL(of_phy_get); | |
348 | ||
ff764963 KVA |
349 | /** |
350 | * phy_put() - release the PHY | |
351 | * @phy: the phy returned by phy_get() | |
352 | * | |
353 | * Releases a refcount the caller received from phy_get(). | |
354 | */ | |
355 | void phy_put(struct phy *phy) | |
356 | { | |
04c2faca | 357 | if (!phy || IS_ERR(phy)) |
ff764963 KVA |
358 | return; |
359 | ||
360 | module_put(phy->ops->owner); | |
361 | put_device(&phy->dev); | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(phy_put); | |
364 | ||
365 | /** | |
366 | * devm_phy_put() - release the PHY | |
367 | * @dev: device that wants to release this phy | |
368 | * @phy: the phy returned by devm_phy_get() | |
369 | * | |
370 | * destroys the devres associated with this phy and invokes phy_put | |
371 | * to release the phy. | |
372 | */ | |
373 | void devm_phy_put(struct device *dev, struct phy *phy) | |
374 | { | |
375 | int r; | |
376 | ||
04c2faca AL |
377 | if (!phy) |
378 | return; | |
379 | ||
ff764963 KVA |
380 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
381 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
382 | } | |
383 | EXPORT_SYMBOL_GPL(devm_phy_put); | |
384 | ||
385 | /** | |
386 | * of_phy_simple_xlate() - returns the phy instance from phy provider | |
387 | * @dev: the PHY provider device | |
388 | * @args: of_phandle_args (not used here) | |
389 | * | |
390 | * Intended to be used by phy provider for the common case where #phy-cells is | |
391 | * 0. For other cases where #phy-cells is greater than '0', the phy provider | |
392 | * should provide a custom of_xlate function that reads the *args* and returns | |
393 | * the appropriate phy. | |
394 | */ | |
395 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args | |
396 | *args) | |
397 | { | |
398 | struct phy *phy; | |
399 | struct class_dev_iter iter; | |
400 | struct device_node *node = dev->of_node; | |
401 | ||
402 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
403 | while ((dev = class_dev_iter_next(&iter))) { | |
404 | phy = to_phy(dev); | |
405 | if (node != phy->dev.of_node) | |
406 | continue; | |
407 | ||
408 | class_dev_iter_exit(&iter); | |
409 | return phy; | |
410 | } | |
411 | ||
412 | class_dev_iter_exit(&iter); | |
413 | return ERR_PTR(-ENODEV); | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); | |
416 | ||
417 | /** | |
418 | * phy_get() - lookup and obtain a reference to a phy. | |
419 | * @dev: device that requests this phy | |
420 | * @string: the phy name as given in the dt data or the name of the controller | |
421 | * port for non-dt case | |
422 | * | |
423 | * Returns the phy driver, after getting a refcount to it; or | |
424 | * -ENODEV if there is no such phy. The caller is responsible for | |
425 | * calling phy_put() to release that count. | |
426 | */ | |
427 | struct phy *phy_get(struct device *dev, const char *string) | |
428 | { | |
429 | int index = 0; | |
d18c9604 | 430 | struct phy *phy; |
ff764963 KVA |
431 | |
432 | if (string == NULL) { | |
433 | dev_WARN(dev, "missing string\n"); | |
434 | return ERR_PTR(-EINVAL); | |
435 | } | |
436 | ||
437 | if (dev->of_node) { | |
438 | index = of_property_match_string(dev->of_node, "phy-names", | |
439 | string); | |
0b3f3b2c | 440 | phy = _of_phy_get(dev->of_node, index); |
ff764963 KVA |
441 | } else { |
442 | phy = phy_lookup(dev, string); | |
ff764963 | 443 | } |
f40037fd HG |
444 | if (IS_ERR(phy)) |
445 | return phy; | |
ff764963 KVA |
446 | |
447 | if (!try_module_get(phy->ops->owner)) | |
448 | return ERR_PTR(-EPROBE_DEFER); | |
449 | ||
450 | get_device(&phy->dev); | |
451 | ||
452 | return phy; | |
453 | } | |
454 | EXPORT_SYMBOL_GPL(phy_get); | |
455 | ||
788a4d56 AL |
456 | /** |
457 | * phy_optional_get() - lookup and obtain a reference to an optional phy. | |
458 | * @dev: device that requests this phy | |
459 | * @string: the phy name as given in the dt data or the name of the controller | |
460 | * port for non-dt case | |
461 | * | |
462 | * Returns the phy driver, after getting a refcount to it; or | |
463 | * NULL if there is no such phy. The caller is responsible for | |
464 | * calling phy_put() to release that count. | |
465 | */ | |
466 | struct phy *phy_optional_get(struct device *dev, const char *string) | |
467 | { | |
468 | struct phy *phy = phy_get(dev, string); | |
469 | ||
470 | if (PTR_ERR(phy) == -ENODEV) | |
471 | phy = NULL; | |
472 | ||
473 | return phy; | |
474 | } | |
475 | EXPORT_SYMBOL_GPL(phy_optional_get); | |
476 | ||
ff764963 KVA |
477 | /** |
478 | * devm_phy_get() - lookup and obtain a reference to a phy. | |
479 | * @dev: device that requests this phy | |
480 | * @string: the phy name as given in the dt data or phy device name | |
481 | * for non-dt case | |
482 | * | |
483 | * Gets the phy using phy_get(), and associates a device with it using | |
484 | * devres. On driver detach, release function is invoked on the devres data, | |
485 | * then, devres data is freed. | |
486 | */ | |
487 | struct phy *devm_phy_get(struct device *dev, const char *string) | |
488 | { | |
489 | struct phy **ptr, *phy; | |
490 | ||
491 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
492 | if (!ptr) | |
493 | return ERR_PTR(-ENOMEM); | |
494 | ||
495 | phy = phy_get(dev, string); | |
496 | if (!IS_ERR(phy)) { | |
497 | *ptr = phy; | |
498 | devres_add(dev, ptr); | |
499 | } else { | |
500 | devres_free(ptr); | |
501 | } | |
502 | ||
503 | return phy; | |
504 | } | |
505 | EXPORT_SYMBOL_GPL(devm_phy_get); | |
506 | ||
788a4d56 AL |
507 | /** |
508 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. | |
509 | * @dev: device that requests this phy | |
510 | * @string: the phy name as given in the dt data or phy device name | |
511 | * for non-dt case | |
512 | * | |
513 | * Gets the phy using phy_get(), and associates a device with it using | |
514 | * devres. On driver detach, release function is invoked on the devres | |
515 | * data, then, devres data is freed. This differs to devm_phy_get() in | |
516 | * that if the phy does not exist, it is not considered an error and | |
517 | * -ENODEV will not be returned. Instead the NULL phy is returned, | |
518 | * which can be passed to all other phy consumer calls. | |
519 | */ | |
520 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) | |
521 | { | |
522 | struct phy *phy = devm_phy_get(dev, string); | |
523 | ||
524 | if (PTR_ERR(phy) == -ENODEV) | |
525 | phy = NULL; | |
526 | ||
527 | return phy; | |
528 | } | |
529 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); | |
530 | ||
b5d682f4 KD |
531 | /** |
532 | * devm_of_phy_get() - lookup and obtain a reference to a phy. | |
533 | * @dev: device that requests this phy | |
534 | * @np: node containing the phy | |
535 | * @con_id: name of the phy from device's point of view | |
536 | * | |
537 | * Gets the phy using of_phy_get(), and associates a device with it using | |
538 | * devres. On driver detach, release function is invoked on the devres data, | |
539 | * then, devres data is freed. | |
540 | */ | |
541 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, | |
542 | const char *con_id) | |
543 | { | |
544 | struct phy **ptr, *phy; | |
545 | ||
546 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
547 | if (!ptr) | |
548 | return ERR_PTR(-ENOMEM); | |
549 | ||
550 | phy = of_phy_get(np, con_id); | |
551 | if (!IS_ERR(phy)) { | |
552 | *ptr = phy; | |
553 | devres_add(dev, ptr); | |
554 | } else { | |
555 | devres_free(ptr); | |
556 | } | |
557 | ||
558 | return phy; | |
559 | } | |
560 | EXPORT_SYMBOL_GPL(devm_of_phy_get); | |
561 | ||
ff764963 KVA |
562 | /** |
563 | * phy_create() - create a new phy | |
564 | * @dev: device that is creating the new phy | |
565 | * @ops: function pointers for performing phy operations | |
566 | * @init_data: contains the list of PHY consumers or NULL | |
567 | * | |
568 | * Called to create a phy using phy framework. | |
569 | */ | |
570 | struct phy *phy_create(struct device *dev, const struct phy_ops *ops, | |
571 | struct phy_init_data *init_data) | |
572 | { | |
573 | int ret; | |
574 | int id; | |
575 | struct phy *phy; | |
576 | ||
52797d29 DC |
577 | if (WARN_ON(!dev)) |
578 | return ERR_PTR(-EINVAL); | |
ff764963 KVA |
579 | |
580 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
52797d29 DC |
581 | if (!phy) |
582 | return ERR_PTR(-ENOMEM); | |
ff764963 KVA |
583 | |
584 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); | |
585 | if (id < 0) { | |
586 | dev_err(dev, "unable to get id\n"); | |
587 | ret = id; | |
52797d29 | 588 | goto free_phy; |
ff764963 KVA |
589 | } |
590 | ||
591 | device_initialize(&phy->dev); | |
592 | mutex_init(&phy->mutex); | |
593 | ||
594 | phy->dev.class = phy_class; | |
595 | phy->dev.parent = dev; | |
596 | phy->dev.of_node = dev->of_node; | |
597 | phy->id = id; | |
598 | phy->ops = ops; | |
599 | phy->init_data = init_data; | |
600 | ||
601 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); | |
602 | if (ret) | |
52797d29 | 603 | goto put_dev; |
ff764963 KVA |
604 | |
605 | ret = device_add(&phy->dev); | |
606 | if (ret) | |
52797d29 | 607 | goto put_dev; |
ff764963 KVA |
608 | |
609 | if (pm_runtime_enabled(dev)) { | |
610 | pm_runtime_enable(&phy->dev); | |
611 | pm_runtime_no_callbacks(&phy->dev); | |
612 | } | |
613 | ||
614 | return phy; | |
615 | ||
52797d29 | 616 | put_dev: |
ff764963 | 617 | put_device(&phy->dev); |
52797d29 DC |
618 | ida_remove(&phy_ida, phy->id); |
619 | free_phy: | |
ff764963 | 620 | kfree(phy); |
ff764963 KVA |
621 | return ERR_PTR(ret); |
622 | } | |
623 | EXPORT_SYMBOL_GPL(phy_create); | |
624 | ||
625 | /** | |
626 | * devm_phy_create() - create a new phy | |
627 | * @dev: device that is creating the new phy | |
628 | * @ops: function pointers for performing phy operations | |
629 | * @init_data: contains the list of PHY consumers or NULL | |
630 | * | |
631 | * Creates a new PHY device adding it to the PHY class. | |
632 | * While at that, it also associates the device with the phy using devres. | |
633 | * On driver detach, release function is invoked on the devres data, | |
634 | * then, devres data is freed. | |
635 | */ | |
636 | struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops, | |
637 | struct phy_init_data *init_data) | |
638 | { | |
639 | struct phy **ptr, *phy; | |
640 | ||
641 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); | |
642 | if (!ptr) | |
643 | return ERR_PTR(-ENOMEM); | |
644 | ||
645 | phy = phy_create(dev, ops, init_data); | |
646 | if (!IS_ERR(phy)) { | |
647 | *ptr = phy; | |
648 | devres_add(dev, ptr); | |
649 | } else { | |
650 | devres_free(ptr); | |
651 | } | |
652 | ||
653 | return phy; | |
654 | } | |
655 | EXPORT_SYMBOL_GPL(devm_phy_create); | |
656 | ||
657 | /** | |
658 | * phy_destroy() - destroy the phy | |
659 | * @phy: the phy to be destroyed | |
660 | * | |
661 | * Called to destroy the phy. | |
662 | */ | |
663 | void phy_destroy(struct phy *phy) | |
664 | { | |
665 | pm_runtime_disable(&phy->dev); | |
666 | device_unregister(&phy->dev); | |
667 | } | |
668 | EXPORT_SYMBOL_GPL(phy_destroy); | |
669 | ||
670 | /** | |
671 | * devm_phy_destroy() - destroy the PHY | |
672 | * @dev: device that wants to release this phy | |
673 | * @phy: the phy returned by devm_phy_get() | |
674 | * | |
675 | * destroys the devres associated with this phy and invokes phy_destroy | |
676 | * to destroy the phy. | |
677 | */ | |
678 | void devm_phy_destroy(struct device *dev, struct phy *phy) | |
679 | { | |
680 | int r; | |
681 | ||
682 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); | |
683 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
684 | } | |
685 | EXPORT_SYMBOL_GPL(devm_phy_destroy); | |
686 | ||
687 | /** | |
688 | * __of_phy_provider_register() - create/register phy provider with the framework | |
689 | * @dev: struct device of the phy provider | |
690 | * @owner: the module owner containing of_xlate | |
691 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
692 | * | |
693 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
694 | * This is used in the case of dt boot for finding the phy instance from | |
695 | * phy provider. | |
696 | */ | |
697 | struct phy_provider *__of_phy_provider_register(struct device *dev, | |
698 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
699 | struct of_phandle_args *args)) | |
700 | { | |
701 | struct phy_provider *phy_provider; | |
702 | ||
703 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); | |
704 | if (!phy_provider) | |
705 | return ERR_PTR(-ENOMEM); | |
706 | ||
707 | phy_provider->dev = dev; | |
708 | phy_provider->owner = owner; | |
709 | phy_provider->of_xlate = of_xlate; | |
710 | ||
711 | mutex_lock(&phy_provider_mutex); | |
712 | list_add_tail(&phy_provider->list, &phy_provider_list); | |
713 | mutex_unlock(&phy_provider_mutex); | |
714 | ||
715 | return phy_provider; | |
716 | } | |
717 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); | |
718 | ||
719 | /** | |
720 | * __devm_of_phy_provider_register() - create/register phy provider with the | |
721 | * framework | |
722 | * @dev: struct device of the phy provider | |
723 | * @owner: the module owner containing of_xlate | |
724 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
725 | * | |
726 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
727 | * This is used in the case of dt boot for finding the phy instance from | |
728 | * phy provider. While at that, it also associates the device with the | |
729 | * phy provider using devres. On driver detach, release function is invoked | |
730 | * on the devres data, then, devres data is freed. | |
731 | */ | |
732 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, | |
733 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
734 | struct of_phandle_args *args)) | |
735 | { | |
736 | struct phy_provider **ptr, *phy_provider; | |
737 | ||
738 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); | |
739 | if (!ptr) | |
740 | return ERR_PTR(-ENOMEM); | |
741 | ||
742 | phy_provider = __of_phy_provider_register(dev, owner, of_xlate); | |
743 | if (!IS_ERR(phy_provider)) { | |
744 | *ptr = phy_provider; | |
745 | devres_add(dev, ptr); | |
746 | } else { | |
747 | devres_free(ptr); | |
748 | } | |
749 | ||
750 | return phy_provider; | |
751 | } | |
752 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); | |
753 | ||
754 | /** | |
755 | * of_phy_provider_unregister() - unregister phy provider from the framework | |
756 | * @phy_provider: phy provider returned by of_phy_provider_register() | |
757 | * | |
758 | * Removes the phy_provider created using of_phy_provider_register(). | |
759 | */ | |
760 | void of_phy_provider_unregister(struct phy_provider *phy_provider) | |
761 | { | |
762 | if (IS_ERR(phy_provider)) | |
763 | return; | |
764 | ||
765 | mutex_lock(&phy_provider_mutex); | |
766 | list_del(&phy_provider->list); | |
767 | kfree(phy_provider); | |
768 | mutex_unlock(&phy_provider_mutex); | |
769 | } | |
770 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); | |
771 | ||
772 | /** | |
773 | * devm_of_phy_provider_unregister() - remove phy provider from the framework | |
774 | * @dev: struct device of the phy provider | |
775 | * | |
776 | * destroys the devres associated with this phy provider and invokes | |
777 | * of_phy_provider_unregister to unregister the phy provider. | |
778 | */ | |
779 | void devm_of_phy_provider_unregister(struct device *dev, | |
780 | struct phy_provider *phy_provider) { | |
781 | int r; | |
782 | ||
783 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, | |
784 | phy_provider); | |
785 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); | |
786 | } | |
787 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); | |
788 | ||
789 | /** | |
790 | * phy_release() - release the phy | |
791 | * @dev: the dev member within phy | |
792 | * | |
793 | * When the last reference to the device is removed, it is called | |
794 | * from the embedded kobject as release method. | |
795 | */ | |
796 | static void phy_release(struct device *dev) | |
797 | { | |
798 | struct phy *phy; | |
799 | ||
800 | phy = to_phy(dev); | |
801 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); | |
802 | ida_remove(&phy_ida, phy->id); | |
803 | kfree(phy); | |
804 | } | |
805 | ||
806 | static int __init phy_core_init(void) | |
807 | { | |
808 | phy_class = class_create(THIS_MODULE, "phy"); | |
809 | if (IS_ERR(phy_class)) { | |
810 | pr_err("failed to create phy class --> %ld\n", | |
811 | PTR_ERR(phy_class)); | |
812 | return PTR_ERR(phy_class); | |
813 | } | |
814 | ||
815 | phy_class->dev_release = phy_release; | |
816 | ||
817 | return 0; | |
818 | } | |
819 | module_init(phy_core_init); | |
820 | ||
821 | static void __exit phy_core_exit(void) | |
822 | { | |
823 | class_destroy(phy_class); | |
824 | } | |
825 | module_exit(phy_core_exit); | |
826 | ||
827 | MODULE_DESCRIPTION("Generic PHY Framework"); | |
828 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); | |
829 | MODULE_LICENSE("GPL v2"); |