Commit | Line | Data |
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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> | |
91694772 | 14 | #include <linux/debugfs.h> |
ff764963 KVA |
15 | #include <linux/device.h> |
16 | #include <linux/slab.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/phy/phy.h> | |
19 | #include <linux/idr.h> | |
20 | #include <linux/pm_runtime.h> | |
3be88125 | 21 | #include <linux/regulator/consumer.h> |
ff764963 KVA |
22 | |
23 | static struct class *phy_class; | |
91694772 | 24 | static struct dentry *phy_debugfs_root; |
ff764963 KVA |
25 | static DEFINE_MUTEX(phy_provider_mutex); |
26 | static LIST_HEAD(phy_provider_list); | |
b7bc15b9 | 27 | static LIST_HEAD(phys); |
ff764963 KVA |
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 | ||
987351e1 | 34 | phy_put(dev, phy); |
ff764963 KVA |
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 | { | |
2f1bce48 TR |
53 | struct phy **phy = res; |
54 | ||
55 | return *phy == match_data; | |
ff764963 KVA |
56 | } |
57 | ||
b7bc15b9 HK |
58 | /** |
59 | * phy_create_lookup() - allocate and register PHY/device association | |
60 | * @phy: the phy of the association | |
61 | * @con_id: connection ID string on device | |
62 | * @dev_id: the device of the association | |
63 | * | |
64 | * Creates and registers phy_lookup entry. | |
65 | */ | |
66 | int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
67 | { | |
68 | struct phy_lookup *pl; | |
69 | ||
70 | if (!phy || !dev_id || !con_id) | |
71 | return -EINVAL; | |
72 | ||
73 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); | |
74 | if (!pl) | |
75 | return -ENOMEM; | |
76 | ||
77 | pl->dev_id = dev_id; | |
78 | pl->con_id = con_id; | |
79 | pl->phy = phy; | |
80 | ||
81 | mutex_lock(&phy_provider_mutex); | |
82 | list_add_tail(&pl->node, &phys); | |
83 | mutex_unlock(&phy_provider_mutex); | |
84 | ||
85 | return 0; | |
86 | } | |
87 | EXPORT_SYMBOL_GPL(phy_create_lookup); | |
88 | ||
89 | /** | |
90 | * phy_remove_lookup() - find and remove PHY/device association | |
91 | * @phy: the phy of the association | |
92 | * @con_id: connection ID string on device | |
93 | * @dev_id: the device of the association | |
94 | * | |
95 | * Finds and unregisters phy_lookup entry that was created with | |
96 | * phy_create_lookup(). | |
97 | */ | |
98 | void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
99 | { | |
100 | struct phy_lookup *pl; | |
101 | ||
102 | if (!phy || !dev_id || !con_id) | |
103 | return; | |
104 | ||
105 | mutex_lock(&phy_provider_mutex); | |
106 | list_for_each_entry(pl, &phys, node) | |
107 | if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) && | |
108 | !strcmp(pl->con_id, con_id)) { | |
109 | list_del(&pl->node); | |
110 | kfree(pl); | |
111 | break; | |
112 | } | |
113 | mutex_unlock(&phy_provider_mutex); | |
114 | } | |
115 | EXPORT_SYMBOL_GPL(phy_remove_lookup); | |
116 | ||
117 | static struct phy *phy_find(struct device *dev, const char *con_id) | |
118 | { | |
119 | const char *dev_id = dev_name(dev); | |
120 | struct phy_lookup *p, *pl = NULL; | |
b7bc15b9 HK |
121 | |
122 | mutex_lock(&phy_provider_mutex); | |
123 | list_for_each_entry(p, &phys, node) | |
124 | if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) { | |
125 | pl = p; | |
126 | break; | |
127 | } | |
128 | mutex_unlock(&phy_provider_mutex); | |
129 | ||
dbc98635 | 130 | return pl ? pl->phy : ERR_PTR(-ENODEV); |
b7bc15b9 HK |
131 | } |
132 | ||
ff764963 KVA |
133 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
134 | { | |
135 | struct phy_provider *phy_provider; | |
2a4c3701 | 136 | struct device_node *child; |
ff764963 KVA |
137 | |
138 | list_for_each_entry(phy_provider, &phy_provider_list, list) { | |
139 | if (phy_provider->dev->of_node == node) | |
140 | return phy_provider; | |
2a4c3701 | 141 | |
1140f7c8 | 142 | for_each_child_of_node(phy_provider->children, child) |
2a4c3701 KVA |
143 | if (child == node) |
144 | return phy_provider; | |
ff764963 KVA |
145 | } |
146 | ||
147 | return ERR_PTR(-EPROBE_DEFER); | |
148 | } | |
149 | ||
150 | int phy_pm_runtime_get(struct phy *phy) | |
151 | { | |
cedb7f89 FB |
152 | int ret; |
153 | ||
8866df25 MG |
154 | if (!phy) |
155 | return 0; | |
156 | ||
ff764963 KVA |
157 | if (!pm_runtime_enabled(&phy->dev)) |
158 | return -ENOTSUPP; | |
159 | ||
cedb7f89 FB |
160 | ret = pm_runtime_get(&phy->dev); |
161 | if (ret < 0 && ret != -EINPROGRESS) | |
162 | pm_runtime_put_noidle(&phy->dev); | |
163 | ||
164 | return ret; | |
ff764963 KVA |
165 | } |
166 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); | |
167 | ||
168 | int phy_pm_runtime_get_sync(struct phy *phy) | |
169 | { | |
cedb7f89 FB |
170 | int ret; |
171 | ||
8866df25 MG |
172 | if (!phy) |
173 | return 0; | |
174 | ||
ff764963 KVA |
175 | if (!pm_runtime_enabled(&phy->dev)) |
176 | return -ENOTSUPP; | |
177 | ||
cedb7f89 FB |
178 | ret = pm_runtime_get_sync(&phy->dev); |
179 | if (ret < 0) | |
180 | pm_runtime_put_sync(&phy->dev); | |
181 | ||
182 | return ret; | |
ff764963 KVA |
183 | } |
184 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); | |
185 | ||
186 | int phy_pm_runtime_put(struct phy *phy) | |
187 | { | |
8866df25 MG |
188 | if (!phy) |
189 | return 0; | |
190 | ||
ff764963 KVA |
191 | if (!pm_runtime_enabled(&phy->dev)) |
192 | return -ENOTSUPP; | |
193 | ||
194 | return pm_runtime_put(&phy->dev); | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); | |
197 | ||
198 | int phy_pm_runtime_put_sync(struct phy *phy) | |
199 | { | |
8866df25 MG |
200 | if (!phy) |
201 | return 0; | |
202 | ||
ff764963 KVA |
203 | if (!pm_runtime_enabled(&phy->dev)) |
204 | return -ENOTSUPP; | |
205 | ||
206 | return pm_runtime_put_sync(&phy->dev); | |
207 | } | |
208 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); | |
209 | ||
210 | void phy_pm_runtime_allow(struct phy *phy) | |
211 | { | |
8866df25 MG |
212 | if (!phy) |
213 | return; | |
214 | ||
ff764963 KVA |
215 | if (!pm_runtime_enabled(&phy->dev)) |
216 | return; | |
217 | ||
218 | pm_runtime_allow(&phy->dev); | |
219 | } | |
220 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); | |
221 | ||
222 | void phy_pm_runtime_forbid(struct phy *phy) | |
223 | { | |
8866df25 MG |
224 | if (!phy) |
225 | return; | |
226 | ||
ff764963 KVA |
227 | if (!pm_runtime_enabled(&phy->dev)) |
228 | return; | |
229 | ||
230 | pm_runtime_forbid(&phy->dev); | |
231 | } | |
232 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); | |
233 | ||
f1b8d335 JM |
234 | /** |
235 | * phy_init - phy internal initialization before phy operation | |
236 | * @phy: the phy returned by phy_get() | |
237 | * | |
238 | * Used to allow phy's driver to perform phy internal initialization, | |
239 | * such as PLL block powering, clock initialization or anything that's | |
240 | * is required by the phy to perform the start of operation. | |
241 | * Must be called before phy_power_on(). | |
242 | * | |
243 | * Return: %0 if successful, a negative error code otherwise | |
244 | */ | |
ff764963 KVA |
245 | int phy_init(struct phy *phy) |
246 | { | |
247 | int ret; | |
248 | ||
04c2faca AL |
249 | if (!phy) |
250 | return 0; | |
251 | ||
ff764963 KVA |
252 | ret = phy_pm_runtime_get_sync(phy); |
253 | if (ret < 0 && ret != -ENOTSUPP) | |
254 | return ret; | |
736b67a3 | 255 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
256 | |
257 | mutex_lock(&phy->mutex); | |
1599069a JM |
258 | if (phy->power_count > phy->init_count) |
259 | dev_warn(&phy->dev, "phy_power_on was called before phy_init\n"); | |
260 | ||
637d378c | 261 | if (phy->init_count == 0 && phy->ops->init) { |
ff764963 KVA |
262 | ret = phy->ops->init(phy); |
263 | if (ret < 0) { | |
264 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); | |
265 | goto out; | |
266 | } | |
267 | } | |
637d378c | 268 | ++phy->init_count; |
ff764963 KVA |
269 | |
270 | out: | |
271 | mutex_unlock(&phy->mutex); | |
272 | phy_pm_runtime_put(phy); | |
273 | return ret; | |
274 | } | |
275 | EXPORT_SYMBOL_GPL(phy_init); | |
276 | ||
f1b8d335 JM |
277 | /** |
278 | * phy_exit - Phy internal un-initialization | |
279 | * @phy: the phy returned by phy_get() | |
280 | * | |
281 | * Must be called after phy_power_off(). | |
282 | * | |
283 | * Return: %0 if successful, a negative error code otherwise | |
284 | */ | |
ff764963 KVA |
285 | int phy_exit(struct phy *phy) |
286 | { | |
287 | int ret; | |
288 | ||
04c2faca AL |
289 | if (!phy) |
290 | return 0; | |
291 | ||
ff764963 KVA |
292 | ret = phy_pm_runtime_get_sync(phy); |
293 | if (ret < 0 && ret != -ENOTSUPP) | |
294 | return ret; | |
736b67a3 | 295 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
296 | |
297 | mutex_lock(&phy->mutex); | |
637d378c | 298 | if (phy->init_count == 1 && phy->ops->exit) { |
ff764963 KVA |
299 | ret = phy->ops->exit(phy); |
300 | if (ret < 0) { | |
301 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); | |
302 | goto out; | |
303 | } | |
304 | } | |
637d378c | 305 | --phy->init_count; |
ff764963 KVA |
306 | |
307 | out: | |
308 | mutex_unlock(&phy->mutex); | |
309 | phy_pm_runtime_put(phy); | |
310 | return ret; | |
311 | } | |
312 | EXPORT_SYMBOL_GPL(phy_exit); | |
313 | ||
f1b8d335 JM |
314 | /** |
315 | * phy_power_on - Enable the phy and enter proper operation | |
316 | * @phy: the phy returned by phy_get() | |
317 | * | |
318 | * Must be called after phy_init(). | |
319 | * | |
320 | * Return: %0 if successful, a negative error code otherwise | |
321 | */ | |
ff764963 KVA |
322 | int phy_power_on(struct phy *phy) |
323 | { | |
b82fcabe | 324 | int ret = 0; |
ff764963 | 325 | |
04c2faca | 326 | if (!phy) |
b82fcabe | 327 | goto out; |
04c2faca | 328 | |
3be88125 RQ |
329 | if (phy->pwr) { |
330 | ret = regulator_enable(phy->pwr); | |
331 | if (ret) | |
b82fcabe | 332 | goto out; |
3be88125 RQ |
333 | } |
334 | ||
ff764963 KVA |
335 | ret = phy_pm_runtime_get_sync(phy); |
336 | if (ret < 0 && ret != -ENOTSUPP) | |
b82fcabe SL |
337 | goto err_pm_sync; |
338 | ||
736b67a3 | 339 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
340 | |
341 | mutex_lock(&phy->mutex); | |
637d378c | 342 | if (phy->power_count == 0 && phy->ops->power_on) { |
ff764963 KVA |
343 | ret = phy->ops->power_on(phy); |
344 | if (ret < 0) { | |
345 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); | |
b82fcabe | 346 | goto err_pwr_on; |
ff764963 KVA |
347 | } |
348 | } | |
637d378c KVA |
349 | ++phy->power_count; |
350 | mutex_unlock(&phy->mutex); | |
351 | return 0; | |
ff764963 | 352 | |
b82fcabe | 353 | err_pwr_on: |
ff764963 | 354 | mutex_unlock(&phy->mutex); |
637d378c | 355 | phy_pm_runtime_put_sync(phy); |
b82fcabe | 356 | err_pm_sync: |
3be88125 RQ |
357 | if (phy->pwr) |
358 | regulator_disable(phy->pwr); | |
b82fcabe | 359 | out: |
ff764963 KVA |
360 | return ret; |
361 | } | |
362 | EXPORT_SYMBOL_GPL(phy_power_on); | |
363 | ||
f1b8d335 JM |
364 | /** |
365 | * phy_power_off - Disable the phy. | |
366 | * @phy: the phy returned by phy_get() | |
367 | * | |
368 | * Must be called before phy_exit(). | |
369 | * | |
370 | * Return: %0 if successful, a negative error code otherwise | |
371 | */ | |
ff764963 KVA |
372 | int phy_power_off(struct phy *phy) |
373 | { | |
d18c9604 | 374 | int ret; |
ff764963 | 375 | |
04c2faca AL |
376 | if (!phy) |
377 | return 0; | |
378 | ||
ff764963 | 379 | mutex_lock(&phy->mutex); |
637d378c | 380 | if (phy->power_count == 1 && phy->ops->power_off) { |
ff764963 KVA |
381 | ret = phy->ops->power_off(phy); |
382 | if (ret < 0) { | |
383 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); | |
637d378c KVA |
384 | mutex_unlock(&phy->mutex); |
385 | return ret; | |
ff764963 KVA |
386 | } |
387 | } | |
637d378c | 388 | --phy->power_count; |
ff764963 KVA |
389 | mutex_unlock(&phy->mutex); |
390 | phy_pm_runtime_put(phy); | |
391 | ||
3be88125 RQ |
392 | if (phy->pwr) |
393 | regulator_disable(phy->pwr); | |
394 | ||
637d378c | 395 | return 0; |
ff764963 KVA |
396 | } |
397 | EXPORT_SYMBOL_GPL(phy_power_off); | |
398 | ||
79a5a18a | 399 | int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) |
300eb013 DL |
400 | { |
401 | int ret; | |
402 | ||
403 | if (!phy || !phy->ops->set_mode) | |
404 | return 0; | |
405 | ||
406 | mutex_lock(&phy->mutex); | |
79a5a18a | 407 | ret = phy->ops->set_mode(phy, mode, submode); |
3b3cd24a MG |
408 | if (!ret) |
409 | phy->attrs.mode = mode; | |
300eb013 DL |
410 | mutex_unlock(&phy->mutex); |
411 | ||
412 | return ret; | |
413 | } | |
79a5a18a | 414 | EXPORT_SYMBOL_GPL(phy_set_mode_ext); |
300eb013 | 415 | |
6c172e73 SH |
416 | int phy_set_media(struct phy *phy, enum phy_media media) |
417 | { | |
418 | int ret; | |
419 | ||
420 | if (!phy || !phy->ops->set_media) | |
421 | return 0; | |
422 | ||
423 | mutex_lock(&phy->mutex); | |
424 | ret = phy->ops->set_media(phy, media); | |
425 | mutex_unlock(&phy->mutex); | |
426 | ||
427 | return ret; | |
428 | } | |
429 | EXPORT_SYMBOL_GPL(phy_set_media); | |
430 | ||
431 | int phy_set_speed(struct phy *phy, int speed) | |
432 | { | |
433 | int ret; | |
434 | ||
435 | if (!phy || !phy->ops->set_speed) | |
436 | return 0; | |
437 | ||
438 | mutex_lock(&phy->mutex); | |
439 | ret = phy->ops->set_speed(phy, speed); | |
440 | mutex_unlock(&phy->mutex); | |
441 | ||
442 | return ret; | |
443 | } | |
444 | EXPORT_SYMBOL_GPL(phy_set_speed); | |
445 | ||
cac18ecb RL |
446 | int phy_reset(struct phy *phy) |
447 | { | |
448 | int ret; | |
449 | ||
450 | if (!phy || !phy->ops->reset) | |
451 | return 0; | |
452 | ||
4df614c4 KVA |
453 | ret = phy_pm_runtime_get_sync(phy); |
454 | if (ret < 0 && ret != -ENOTSUPP) | |
455 | return ret; | |
456 | ||
cac18ecb RL |
457 | mutex_lock(&phy->mutex); |
458 | ret = phy->ops->reset(phy); | |
459 | mutex_unlock(&phy->mutex); | |
460 | ||
4df614c4 KVA |
461 | phy_pm_runtime_put(phy); |
462 | ||
cac18ecb RL |
463 | return ret; |
464 | } | |
465 | EXPORT_SYMBOL_GPL(phy_reset); | |
466 | ||
bbae18f0 MS |
467 | /** |
468 | * phy_calibrate() - Tunes the phy hw parameters for current configuration | |
469 | * @phy: the phy returned by phy_get() | |
470 | * | |
471 | * Used to calibrate phy hardware, typically by adjusting some parameters in | |
472 | * runtime, which are otherwise lost after host controller reset and cannot | |
473 | * be applied in phy_init() or phy_power_on(). | |
474 | * | |
bd5bd02e | 475 | * Return: %0 if successful, a negative error code otherwise |
bbae18f0 | 476 | */ |
36914111 AP |
477 | int phy_calibrate(struct phy *phy) |
478 | { | |
479 | int ret; | |
480 | ||
481 | if (!phy || !phy->ops->calibrate) | |
482 | return 0; | |
483 | ||
484 | mutex_lock(&phy->mutex); | |
485 | ret = phy->ops->calibrate(phy); | |
486 | mutex_unlock(&phy->mutex); | |
487 | ||
488 | return ret; | |
489 | } | |
490 | EXPORT_SYMBOL_GPL(phy_calibrate); | |
491 | ||
aeaac93d MR |
492 | /** |
493 | * phy_configure() - Changes the phy parameters | |
494 | * @phy: the phy returned by phy_get() | |
495 | * @opts: New configuration to apply | |
496 | * | |
497 | * Used to change the PHY parameters. phy_init() must have been called | |
498 | * on the phy. The configuration will be applied on the current phy | |
499 | * mode, that can be changed using phy_set_mode(). | |
500 | * | |
bd5bd02e | 501 | * Return: %0 if successful, a negative error code otherwise |
aeaac93d MR |
502 | */ |
503 | int phy_configure(struct phy *phy, union phy_configure_opts *opts) | |
504 | { | |
505 | int ret; | |
506 | ||
507 | if (!phy) | |
508 | return -EINVAL; | |
509 | ||
510 | if (!phy->ops->configure) | |
511 | return -EOPNOTSUPP; | |
512 | ||
513 | mutex_lock(&phy->mutex); | |
514 | ret = phy->ops->configure(phy, opts); | |
515 | mutex_unlock(&phy->mutex); | |
516 | ||
517 | return ret; | |
518 | } | |
519 | EXPORT_SYMBOL_GPL(phy_configure); | |
520 | ||
521 | /** | |
522 | * phy_validate() - Checks the phy parameters | |
523 | * @phy: the phy returned by phy_get() | |
524 | * @mode: phy_mode the configuration is applicable to. | |
525 | * @submode: PHY submode the configuration is applicable to. | |
526 | * @opts: Configuration to check | |
527 | * | |
528 | * Used to check that the current set of parameters can be handled by | |
529 | * the phy. Implementations are free to tune the parameters passed as | |
530 | * arguments if needed by some implementation detail or | |
531 | * constraints. It will not change any actual configuration of the | |
532 | * PHY, so calling it as many times as deemed fit will have no side | |
533 | * effect. | |
534 | * | |
bd5bd02e | 535 | * Return: %0 if successful, a negative error code otherwise |
aeaac93d MR |
536 | */ |
537 | int phy_validate(struct phy *phy, enum phy_mode mode, int submode, | |
538 | union phy_configure_opts *opts) | |
539 | { | |
540 | int ret; | |
541 | ||
542 | if (!phy) | |
543 | return -EINVAL; | |
544 | ||
545 | if (!phy->ops->validate) | |
546 | return -EOPNOTSUPP; | |
547 | ||
548 | mutex_lock(&phy->mutex); | |
549 | ret = phy->ops->validate(phy, mode, submode, opts); | |
550 | mutex_unlock(&phy->mutex); | |
551 | ||
552 | return ret; | |
553 | } | |
554 | EXPORT_SYMBOL_GPL(phy_validate); | |
555 | ||
ff764963 | 556 | /** |
0b3f3b2c KD |
557 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
558 | * @np: device_node for which to get the phy | |
ff764963 KVA |
559 | * @index: the index of the phy |
560 | * | |
561 | * Returns the phy associated with the given phandle value, | |
562 | * after getting a refcount to it or -ENODEV if there is no such phy or | |
563 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is | |
564 | * not yet loaded. This function uses of_xlate call back function provided | |
565 | * while registering the phy_provider to find the phy instance. | |
566 | */ | |
0b3f3b2c | 567 | static struct phy *_of_phy_get(struct device_node *np, int index) |
ff764963 KVA |
568 | { |
569 | int ret; | |
570 | struct phy_provider *phy_provider; | |
571 | struct phy *phy = NULL; | |
572 | struct of_phandle_args args; | |
573 | ||
0b3f3b2c | 574 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
ff764963 | 575 | index, &args); |
0b3f3b2c | 576 | if (ret) |
ff764963 | 577 | return ERR_PTR(-ENODEV); |
ff764963 | 578 | |
b7563e27 AB |
579 | /* This phy type handled by the usb-phy subsystem for now */ |
580 | if (of_device_is_compatible(args.np, "usb-nop-xceiv")) | |
581 | return ERR_PTR(-ENODEV); | |
582 | ||
ff764963 KVA |
583 | mutex_lock(&phy_provider_mutex); |
584 | phy_provider = of_phy_provider_lookup(args.np); | |
585 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { | |
586 | phy = ERR_PTR(-EPROBE_DEFER); | |
33f434d2 AL |
587 | goto out_unlock; |
588 | } | |
589 | ||
590 | if (!of_device_is_available(args.np)) { | |
591 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n"); | |
592 | phy = ERR_PTR(-ENODEV); | |
593 | goto out_put_module; | |
ff764963 KVA |
594 | } |
595 | ||
596 | phy = phy_provider->of_xlate(phy_provider->dev, &args); | |
33f434d2 AL |
597 | |
598 | out_put_module: | |
ff764963 KVA |
599 | module_put(phy_provider->owner); |
600 | ||
33f434d2 | 601 | out_unlock: |
ff764963 KVA |
602 | mutex_unlock(&phy_provider_mutex); |
603 | of_node_put(args.np); | |
604 | ||
605 | return phy; | |
606 | } | |
607 | ||
0b3f3b2c KD |
608 | /** |
609 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. | |
610 | * @np: device_node for which to get the phy | |
611 | * @con_id: name of the phy from device's point of view | |
612 | * | |
613 | * Returns the phy driver, after getting a refcount to it; or | |
614 | * -ENODEV if there is no such phy. The caller is responsible for | |
615 | * calling phy_put() to release that count. | |
616 | */ | |
617 | struct phy *of_phy_get(struct device_node *np, const char *con_id) | |
618 | { | |
619 | struct phy *phy = NULL; | |
620 | int index = 0; | |
621 | ||
622 | if (con_id) | |
623 | index = of_property_match_string(np, "phy-names", con_id); | |
624 | ||
625 | phy = _of_phy_get(np, index); | |
626 | if (IS_ERR(phy)) | |
627 | return phy; | |
628 | ||
629 | if (!try_module_get(phy->ops->owner)) | |
630 | return ERR_PTR(-EPROBE_DEFER); | |
631 | ||
632 | get_device(&phy->dev); | |
633 | ||
634 | return phy; | |
635 | } | |
636 | EXPORT_SYMBOL_GPL(of_phy_get); | |
637 | ||
ff764963 | 638 | /** |
987351e1 AT |
639 | * of_phy_put() - release the PHY |
640 | * @phy: the phy returned by of_phy_get() | |
ff764963 | 641 | * |
987351e1 | 642 | * Releases a refcount the caller received from of_phy_get(). |
ff764963 | 643 | */ |
987351e1 | 644 | void of_phy_put(struct phy *phy) |
ff764963 | 645 | { |
04c2faca | 646 | if (!phy || IS_ERR(phy)) |
ff764963 KVA |
647 | return; |
648 | ||
fec06b2b KVA |
649 | mutex_lock(&phy->mutex); |
650 | if (phy->ops->release) | |
651 | phy->ops->release(phy); | |
652 | mutex_unlock(&phy->mutex); | |
653 | ||
ff764963 KVA |
654 | module_put(phy->ops->owner); |
655 | put_device(&phy->dev); | |
656 | } | |
987351e1 AT |
657 | EXPORT_SYMBOL_GPL(of_phy_put); |
658 | ||
659 | /** | |
660 | * phy_put() - release the PHY | |
661 | * @dev: device that wants to release this phy | |
662 | * @phy: the phy returned by phy_get() | |
663 | * | |
664 | * Releases a refcount the caller received from phy_get(). | |
665 | */ | |
666 | void phy_put(struct device *dev, struct phy *phy) | |
667 | { | |
668 | device_link_remove(dev, &phy->dev); | |
669 | of_phy_put(phy); | |
670 | } | |
ff764963 KVA |
671 | EXPORT_SYMBOL_GPL(phy_put); |
672 | ||
673 | /** | |
674 | * devm_phy_put() - release the PHY | |
675 | * @dev: device that wants to release this phy | |
676 | * @phy: the phy returned by devm_phy_get() | |
677 | * | |
678 | * destroys the devres associated with this phy and invokes phy_put | |
679 | * to release the phy. | |
680 | */ | |
681 | void devm_phy_put(struct device *dev, struct phy *phy) | |
682 | { | |
683 | int r; | |
684 | ||
04c2faca AL |
685 | if (!phy) |
686 | return; | |
687 | ||
ff764963 KVA |
688 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
689 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
690 | } | |
691 | EXPORT_SYMBOL_GPL(devm_phy_put); | |
692 | ||
693 | /** | |
694 | * of_phy_simple_xlate() - returns the phy instance from phy provider | |
695 | * @dev: the PHY provider device | |
696 | * @args: of_phandle_args (not used here) | |
697 | * | |
698 | * Intended to be used by phy provider for the common case where #phy-cells is | |
699 | * 0. For other cases where #phy-cells is greater than '0', the phy provider | |
700 | * should provide a custom of_xlate function that reads the *args* and returns | |
701 | * the appropriate phy. | |
702 | */ | |
00ca8a15 KK |
703 | struct phy *of_phy_simple_xlate(struct device *dev, |
704 | const struct of_phandle_args *args) | |
ff764963 KVA |
705 | { |
706 | struct phy *phy; | |
707 | struct class_dev_iter iter; | |
ff764963 KVA |
708 | |
709 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
710 | while ((dev = class_dev_iter_next(&iter))) { | |
711 | phy = to_phy(dev); | |
491e0490 | 712 | if (args->np != phy->dev.of_node) |
ff764963 KVA |
713 | continue; |
714 | ||
715 | class_dev_iter_exit(&iter); | |
716 | return phy; | |
717 | } | |
718 | ||
719 | class_dev_iter_exit(&iter); | |
720 | return ERR_PTR(-ENODEV); | |
721 | } | |
722 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); | |
723 | ||
724 | /** | |
725 | * phy_get() - lookup and obtain a reference to a phy. | |
726 | * @dev: device that requests this phy | |
727 | * @string: the phy name as given in the dt data or the name of the controller | |
728 | * port for non-dt case | |
729 | * | |
730 | * Returns the phy driver, after getting a refcount to it; or | |
731 | * -ENODEV if there is no such phy. The caller is responsible for | |
732 | * calling phy_put() to release that count. | |
733 | */ | |
734 | struct phy *phy_get(struct device *dev, const char *string) | |
735 | { | |
736 | int index = 0; | |
d18c9604 | 737 | struct phy *phy; |
987351e1 | 738 | struct device_link *link; |
ff764963 | 739 | |
ff764963 | 740 | if (dev->of_node) { |
8a917813 RH |
741 | if (string) |
742 | index = of_property_match_string(dev->of_node, "phy-names", | |
743 | string); | |
744 | else | |
745 | index = 0; | |
0b3f3b2c | 746 | phy = _of_phy_get(dev->of_node, index); |
ff764963 | 747 | } else { |
8a917813 RH |
748 | if (string == NULL) { |
749 | dev_WARN(dev, "missing string\n"); | |
750 | return ERR_PTR(-EINVAL); | |
751 | } | |
b7bc15b9 | 752 | phy = phy_find(dev, string); |
ff764963 | 753 | } |
f40037fd HG |
754 | if (IS_ERR(phy)) |
755 | return phy; | |
ff764963 KVA |
756 | |
757 | if (!try_module_get(phy->ops->owner)) | |
758 | return ERR_PTR(-EPROBE_DEFER); | |
759 | ||
760 | get_device(&phy->dev); | |
761 | ||
987351e1 | 762 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); |
1d7cb11e KVA |
763 | if (!link) |
764 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 765 | dev_name(phy->dev.parent)); |
987351e1 | 766 | |
ff764963 KVA |
767 | return phy; |
768 | } | |
769 | EXPORT_SYMBOL_GPL(phy_get); | |
770 | ||
771 | /** | |
772 | * devm_phy_get() - lookup and obtain a reference to a phy. | |
773 | * @dev: device that requests this phy | |
774 | * @string: the phy name as given in the dt data or phy device name | |
775 | * for non-dt case | |
776 | * | |
777 | * Gets the phy using phy_get(), and associates a device with it using | |
778 | * devres. On driver detach, release function is invoked on the devres data, | |
779 | * then, devres data is freed. | |
780 | */ | |
781 | struct phy *devm_phy_get(struct device *dev, const char *string) | |
782 | { | |
783 | struct phy **ptr, *phy; | |
784 | ||
785 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
786 | if (!ptr) | |
787 | return ERR_PTR(-ENOMEM); | |
788 | ||
789 | phy = phy_get(dev, string); | |
790 | if (!IS_ERR(phy)) { | |
791 | *ptr = phy; | |
792 | devres_add(dev, ptr); | |
793 | } else { | |
794 | devres_free(ptr); | |
795 | } | |
796 | ||
797 | return phy; | |
798 | } | |
799 | EXPORT_SYMBOL_GPL(devm_phy_get); | |
800 | ||
788a4d56 AL |
801 | /** |
802 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. | |
803 | * @dev: device that requests this phy | |
804 | * @string: the phy name as given in the dt data or phy device name | |
805 | * for non-dt case | |
806 | * | |
807 | * Gets the phy using phy_get(), and associates a device with it using | |
808 | * devres. On driver detach, release function is invoked on the devres | |
809 | * data, then, devres data is freed. This differs to devm_phy_get() in | |
810 | * that if the phy does not exist, it is not considered an error and | |
811 | * -ENODEV will not be returned. Instead the NULL phy is returned, | |
812 | * which can be passed to all other phy consumer calls. | |
813 | */ | |
814 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) | |
815 | { | |
816 | struct phy *phy = devm_phy_get(dev, string); | |
817 | ||
45586c70 | 818 | if (PTR_ERR(phy) == -ENODEV) |
788a4d56 AL |
819 | phy = NULL; |
820 | ||
821 | return phy; | |
822 | } | |
823 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); | |
824 | ||
b5d682f4 KD |
825 | /** |
826 | * devm_of_phy_get() - lookup and obtain a reference to a phy. | |
827 | * @dev: device that requests this phy | |
828 | * @np: node containing the phy | |
829 | * @con_id: name of the phy from device's point of view | |
830 | * | |
831 | * Gets the phy using of_phy_get(), and associates a device with it using | |
832 | * devres. On driver detach, release function is invoked on the devres data, | |
833 | * then, devres data is freed. | |
834 | */ | |
835 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, | |
836 | const char *con_id) | |
837 | { | |
838 | struct phy **ptr, *phy; | |
987351e1 | 839 | struct device_link *link; |
b5d682f4 KD |
840 | |
841 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
842 | if (!ptr) | |
843 | return ERR_PTR(-ENOMEM); | |
844 | ||
845 | phy = of_phy_get(np, con_id); | |
846 | if (!IS_ERR(phy)) { | |
847 | *ptr = phy; | |
848 | devres_add(dev, ptr); | |
849 | } else { | |
850 | devres_free(ptr); | |
987351e1 AT |
851 | return phy; |
852 | } | |
853 | ||
854 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); | |
1d7cb11e KVA |
855 | if (!link) |
856 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 857 | dev_name(phy->dev.parent)); |
b5d682f4 KD |
858 | |
859 | return phy; | |
860 | } | |
861 | EXPORT_SYMBOL_GPL(devm_of_phy_get); | |
862 | ||
d02aa181 GU |
863 | /** |
864 | * devm_of_phy_optional_get() - lookup and obtain a reference to an optional | |
865 | * phy. | |
866 | * @dev: device that requests this phy | |
867 | * @np: node containing the phy | |
868 | * @con_id: name of the phy from device's point of view | |
869 | * | |
870 | * Gets the phy using of_phy_get(), and associates a device with it using | |
871 | * devres. On driver detach, release function is invoked on the devres data, | |
872 | * then, devres data is freed. This differs to devm_of_phy_get() in | |
873 | * that if the phy does not exist, it is not considered an error and | |
874 | * -ENODEV will not be returned. Instead the NULL phy is returned, | |
875 | * which can be passed to all other phy consumer calls. | |
876 | */ | |
877 | struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np, | |
878 | const char *con_id) | |
879 | { | |
880 | struct phy *phy = devm_of_phy_get(dev, np, con_id); | |
881 | ||
882 | if (PTR_ERR(phy) == -ENODEV) | |
883 | phy = NULL; | |
884 | ||
885 | if (IS_ERR(phy)) | |
886 | dev_err_probe(dev, PTR_ERR(phy), "failed to get PHY %pOF:%s", | |
887 | np, con_id); | |
888 | ||
889 | return phy; | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(devm_of_phy_optional_get); | |
892 | ||
6be109b3 AR |
893 | /** |
894 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. | |
895 | * @dev: device that requests this phy | |
896 | * @np: node containing the phy | |
897 | * @index: index of the phy | |
898 | * | |
70874462 CY |
899 | * Gets the phy using _of_phy_get(), then gets a refcount to it, |
900 | * and associates a device with it using devres. On driver detach, | |
901 | * release function is invoked on the devres data, | |
6be109b3 AR |
902 | * then, devres data is freed. |
903 | * | |
904 | */ | |
905 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, | |
906 | int index) | |
907 | { | |
908 | struct phy **ptr, *phy; | |
987351e1 | 909 | struct device_link *link; |
6be109b3 AR |
910 | |
911 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
912 | if (!ptr) | |
913 | return ERR_PTR(-ENOMEM); | |
914 | ||
915 | phy = _of_phy_get(np, index); | |
70874462 | 916 | if (IS_ERR(phy)) { |
6be109b3 | 917 | devres_free(ptr); |
70874462 | 918 | return phy; |
6be109b3 AR |
919 | } |
920 | ||
70874462 CY |
921 | if (!try_module_get(phy->ops->owner)) { |
922 | devres_free(ptr); | |
923 | return ERR_PTR(-EPROBE_DEFER); | |
924 | } | |
925 | ||
926 | get_device(&phy->dev); | |
927 | ||
928 | *ptr = phy; | |
929 | devres_add(dev, ptr); | |
930 | ||
987351e1 | 931 | link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS); |
1d7cb11e KVA |
932 | if (!link) |
933 | dev_dbg(dev, "failed to create device link to %s\n", | |
987351e1 | 934 | dev_name(phy->dev.parent)); |
987351e1 | 935 | |
6be109b3 AR |
936 | return phy; |
937 | } | |
938 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); | |
939 | ||
ff764963 KVA |
940 | /** |
941 | * phy_create() - create a new phy | |
942 | * @dev: device that is creating the new phy | |
f0ed8176 | 943 | * @node: device node of the phy |
ff764963 | 944 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
945 | * |
946 | * Called to create a phy using phy framework. | |
947 | */ | |
f0ed8176 | 948 | struct phy *phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 949 | const struct phy_ops *ops) |
ff764963 KVA |
950 | { |
951 | int ret; | |
952 | int id; | |
953 | struct phy *phy; | |
954 | ||
52797d29 DC |
955 | if (WARN_ON(!dev)) |
956 | return ERR_PTR(-EINVAL); | |
ff764963 KVA |
957 | |
958 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
52797d29 DC |
959 | if (!phy) |
960 | return ERR_PTR(-ENOMEM); | |
ff764963 | 961 | |
772dd70a | 962 | id = ida_alloc(&phy_ida, GFP_KERNEL); |
ff764963 KVA |
963 | if (id < 0) { |
964 | dev_err(dev, "unable to get id\n"); | |
965 | ret = id; | |
52797d29 | 966 | goto free_phy; |
ff764963 KVA |
967 | } |
968 | ||
969 | device_initialize(&phy->dev); | |
970 | mutex_init(&phy->mutex); | |
971 | ||
972 | phy->dev.class = phy_class; | |
973 | phy->dev.parent = dev; | |
f0ed8176 | 974 | phy->dev.of_node = node ?: dev->of_node; |
ff764963 KVA |
975 | phy->id = id; |
976 | phy->ops = ops; | |
ff764963 KVA |
977 | |
978 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); | |
979 | if (ret) | |
52797d29 | 980 | goto put_dev; |
ff764963 | 981 | |
87006dd6 DT |
982 | /* phy-supply */ |
983 | phy->pwr = regulator_get_optional(&phy->dev, "phy"); | |
984 | if (IS_ERR(phy->pwr)) { | |
985 | ret = PTR_ERR(phy->pwr); | |
986 | if (ret == -EPROBE_DEFER) | |
987 | goto put_dev; | |
988 | ||
989 | phy->pwr = NULL; | |
990 | } | |
991 | ||
ff764963 KVA |
992 | ret = device_add(&phy->dev); |
993 | if (ret) | |
52797d29 | 994 | goto put_dev; |
ff764963 KVA |
995 | |
996 | if (pm_runtime_enabled(dev)) { | |
997 | pm_runtime_enable(&phy->dev); | |
998 | pm_runtime_no_callbacks(&phy->dev); | |
999 | } | |
1000 | ||
91694772 CY |
1001 | phy->debugfs = debugfs_create_dir(dev_name(&phy->dev), phy_debugfs_root); |
1002 | ||
ff764963 KVA |
1003 | return phy; |
1004 | ||
52797d29 | 1005 | put_dev: |
e73b49f1 RQ |
1006 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
1007 | return ERR_PTR(ret); | |
1008 | ||
52797d29 | 1009 | free_phy: |
ff764963 | 1010 | kfree(phy); |
ff764963 KVA |
1011 | return ERR_PTR(ret); |
1012 | } | |
1013 | EXPORT_SYMBOL_GPL(phy_create); | |
1014 | ||
1015 | /** | |
1016 | * devm_phy_create() - create a new phy | |
1017 | * @dev: device that is creating the new phy | |
f0ed8176 | 1018 | * @node: device node of the phy |
ff764963 | 1019 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
1020 | * |
1021 | * Creates a new PHY device adding it to the PHY class. | |
1022 | * While at that, it also associates the device with the phy using devres. | |
1023 | * On driver detach, release function is invoked on the devres data, | |
1024 | * then, devres data is freed. | |
1025 | */ | |
f0ed8176 | 1026 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 1027 | const struct phy_ops *ops) |
ff764963 KVA |
1028 | { |
1029 | struct phy **ptr, *phy; | |
1030 | ||
1031 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); | |
1032 | if (!ptr) | |
1033 | return ERR_PTR(-ENOMEM); | |
1034 | ||
dbc98635 | 1035 | phy = phy_create(dev, node, ops); |
ff764963 KVA |
1036 | if (!IS_ERR(phy)) { |
1037 | *ptr = phy; | |
1038 | devres_add(dev, ptr); | |
1039 | } else { | |
1040 | devres_free(ptr); | |
1041 | } | |
1042 | ||
1043 | return phy; | |
1044 | } | |
1045 | EXPORT_SYMBOL_GPL(devm_phy_create); | |
1046 | ||
1047 | /** | |
1048 | * phy_destroy() - destroy the phy | |
1049 | * @phy: the phy to be destroyed | |
1050 | * | |
1051 | * Called to destroy the phy. | |
1052 | */ | |
1053 | void phy_destroy(struct phy *phy) | |
1054 | { | |
1055 | pm_runtime_disable(&phy->dev); | |
1056 | device_unregister(&phy->dev); | |
1057 | } | |
1058 | EXPORT_SYMBOL_GPL(phy_destroy); | |
1059 | ||
1060 | /** | |
1061 | * devm_phy_destroy() - destroy the PHY | |
1062 | * @dev: device that wants to release this phy | |
1063 | * @phy: the phy returned by devm_phy_get() | |
1064 | * | |
1065 | * destroys the devres associated with this phy and invokes phy_destroy | |
1066 | * to destroy the phy. | |
1067 | */ | |
1068 | void devm_phy_destroy(struct device *dev, struct phy *phy) | |
1069 | { | |
1070 | int r; | |
1071 | ||
1072 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); | |
1073 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
1074 | } | |
1075 | EXPORT_SYMBOL_GPL(devm_phy_destroy); | |
1076 | ||
1077 | /** | |
1078 | * __of_phy_provider_register() - create/register phy provider with the framework | |
1079 | * @dev: struct device of the phy provider | |
1140f7c8 | 1080 | * @children: device node containing children (if different from dev->of_node) |
ff764963 KVA |
1081 | * @owner: the module owner containing of_xlate |
1082 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
1083 | * | |
1084 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
1085 | * This is used in the case of dt boot for finding the phy instance from | |
1086 | * phy provider. | |
1140f7c8 TR |
1087 | * |
1088 | * If the PHY provider doesn't nest children directly but uses a separate | |
1089 | * child node to contain the individual children, the @children parameter | |
1090 | * can be used to override the default. If NULL, the default (dev->of_node) | |
1091 | * will be used. If non-NULL, the device node must be a child (or further | |
1092 | * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL | |
1093 | * error code is returned. | |
ff764963 KVA |
1094 | */ |
1095 | struct phy_provider *__of_phy_provider_register(struct device *dev, | |
1140f7c8 TR |
1096 | struct device_node *children, struct module *owner, |
1097 | struct phy * (*of_xlate)(struct device *dev, | |
00ca8a15 | 1098 | const struct of_phandle_args *args)) |
ff764963 KVA |
1099 | { |
1100 | struct phy_provider *phy_provider; | |
1101 | ||
1140f7c8 TR |
1102 | /* |
1103 | * If specified, the device node containing the children must itself | |
1104 | * be the provider's device node or a child (or further descendant) | |
1105 | * thereof. | |
1106 | */ | |
1107 | if (children) { | |
1108 | struct device_node *parent = of_node_get(children), *next; | |
1109 | ||
1110 | while (parent) { | |
1111 | if (parent == dev->of_node) | |
1112 | break; | |
1113 | ||
1114 | next = of_get_parent(parent); | |
1115 | of_node_put(parent); | |
1116 | parent = next; | |
1117 | } | |
1118 | ||
1119 | if (!parent) | |
1120 | return ERR_PTR(-EINVAL); | |
1121 | ||
1122 | of_node_put(parent); | |
1123 | } else { | |
1124 | children = dev->of_node; | |
1125 | } | |
1126 | ||
ff764963 KVA |
1127 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); |
1128 | if (!phy_provider) | |
1129 | return ERR_PTR(-ENOMEM); | |
1130 | ||
1131 | phy_provider->dev = dev; | |
1140f7c8 | 1132 | phy_provider->children = of_node_get(children); |
ff764963 KVA |
1133 | phy_provider->owner = owner; |
1134 | phy_provider->of_xlate = of_xlate; | |
1135 | ||
1136 | mutex_lock(&phy_provider_mutex); | |
1137 | list_add_tail(&phy_provider->list, &phy_provider_list); | |
1138 | mutex_unlock(&phy_provider_mutex); | |
1139 | ||
1140 | return phy_provider; | |
1141 | } | |
1142 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); | |
1143 | ||
1144 | /** | |
1145 | * __devm_of_phy_provider_register() - create/register phy provider with the | |
1146 | * framework | |
1147 | * @dev: struct device of the phy provider | |
aad075c1 | 1148 | * @children: device node containing children (if different from dev->of_node) |
ff764963 KVA |
1149 | * @owner: the module owner containing of_xlate |
1150 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
1151 | * | |
1152 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
1153 | * This is used in the case of dt boot for finding the phy instance from | |
1154 | * phy provider. While at that, it also associates the device with the | |
1155 | * phy provider using devres. On driver detach, release function is invoked | |
1156 | * on the devres data, then, devres data is freed. | |
1157 | */ | |
1158 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, | |
1140f7c8 TR |
1159 | struct device_node *children, struct module *owner, |
1160 | struct phy * (*of_xlate)(struct device *dev, | |
00ca8a15 | 1161 | const struct of_phandle_args *args)) |
ff764963 KVA |
1162 | { |
1163 | struct phy_provider **ptr, *phy_provider; | |
1164 | ||
1165 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); | |
1166 | if (!ptr) | |
1167 | return ERR_PTR(-ENOMEM); | |
1168 | ||
1140f7c8 TR |
1169 | phy_provider = __of_phy_provider_register(dev, children, owner, |
1170 | of_xlate); | |
ff764963 KVA |
1171 | if (!IS_ERR(phy_provider)) { |
1172 | *ptr = phy_provider; | |
1173 | devres_add(dev, ptr); | |
1174 | } else { | |
1175 | devres_free(ptr); | |
1176 | } | |
1177 | ||
1178 | return phy_provider; | |
1179 | } | |
1180 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); | |
1181 | ||
1182 | /** | |
1183 | * of_phy_provider_unregister() - unregister phy provider from the framework | |
1184 | * @phy_provider: phy provider returned by of_phy_provider_register() | |
1185 | * | |
1186 | * Removes the phy_provider created using of_phy_provider_register(). | |
1187 | */ | |
1188 | void of_phy_provider_unregister(struct phy_provider *phy_provider) | |
1189 | { | |
1190 | if (IS_ERR(phy_provider)) | |
1191 | return; | |
1192 | ||
1193 | mutex_lock(&phy_provider_mutex); | |
1194 | list_del(&phy_provider->list); | |
1140f7c8 | 1195 | of_node_put(phy_provider->children); |
ff764963 KVA |
1196 | kfree(phy_provider); |
1197 | mutex_unlock(&phy_provider_mutex); | |
1198 | } | |
1199 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); | |
1200 | ||
1201 | /** | |
1202 | * devm_of_phy_provider_unregister() - remove phy provider from the framework | |
1203 | * @dev: struct device of the phy provider | |
aad075c1 | 1204 | * @phy_provider: phy provider returned by of_phy_provider_register() |
ff764963 KVA |
1205 | * |
1206 | * destroys the devres associated with this phy provider and invokes | |
1207 | * of_phy_provider_unregister to unregister the phy provider. | |
1208 | */ | |
1209 | void devm_of_phy_provider_unregister(struct device *dev, | |
b555f35f VK |
1210 | struct phy_provider *phy_provider) |
1211 | { | |
ff764963 KVA |
1212 | int r; |
1213 | ||
1214 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, | |
1215 | phy_provider); | |
1216 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); | |
1217 | } | |
1218 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); | |
1219 | ||
1220 | /** | |
1221 | * phy_release() - release the phy | |
1222 | * @dev: the dev member within phy | |
1223 | * | |
1224 | * When the last reference to the device is removed, it is called | |
1225 | * from the embedded kobject as release method. | |
1226 | */ | |
1227 | static void phy_release(struct device *dev) | |
1228 | { | |
1229 | struct phy *phy; | |
1230 | ||
1231 | phy = to_phy(dev); | |
1232 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); | |
91694772 | 1233 | debugfs_remove_recursive(phy->debugfs); |
3be88125 | 1234 | regulator_put(phy->pwr); |
772dd70a | 1235 | ida_free(&phy_ida, phy->id); |
ff764963 KVA |
1236 | kfree(phy); |
1237 | } | |
1238 | ||
1239 | static int __init phy_core_init(void) | |
1240 | { | |
1aaba11d | 1241 | phy_class = class_create("phy"); |
ff764963 KVA |
1242 | if (IS_ERR(phy_class)) { |
1243 | pr_err("failed to create phy class --> %ld\n", | |
1244 | PTR_ERR(phy_class)); | |
1245 | return PTR_ERR(phy_class); | |
1246 | } | |
1247 | ||
1248 | phy_class->dev_release = phy_release; | |
1249 | ||
91694772 CY |
1250 | phy_debugfs_root = debugfs_create_dir("phy", NULL); |
1251 | ||
ff764963 KVA |
1252 | return 0; |
1253 | } | |
cc013c28 | 1254 | device_initcall(phy_core_init); |
91694772 CY |
1255 | |
1256 | static void __exit phy_core_exit(void) | |
1257 | { | |
1258 | debugfs_remove_recursive(phy_debugfs_root); | |
1259 | class_destroy(phy_class); | |
1260 | } | |
1261 | module_exit(phy_core_exit); |