blob: b04f4fe85ac2d7c83f731602aff84e49b36f5ba8 [file] [log] [blame]
Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05302/*
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>
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05308 */
9
10#include <linux/kernel.h>
11#include <linux/export.h>
12#include <linux/module.h>
13#include <linux/err.h>
14#include <linux/device.h>
15#include <linux/slab.h>
16#include <linux/of.h>
17#include <linux/phy/phy.h>
18#include <linux/idr.h>
19#include <linux/pm_runtime.h>
Roger Quadros3be88122014-07-04 12:55:45 +030020#include <linux/regulator/consumer.h>
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +053021
22static struct class *phy_class;
23static DEFINE_MUTEX(phy_provider_mutex);
24static LIST_HEAD(phy_provider_list);
Heikki Krogerusb7bc15b2014-11-19 17:28:18 +020025static LIST_HEAD(phys);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +053026static DEFINE_IDA(phy_ida);
27
28static void devm_phy_release(struct device *dev, void *res)
29{
30 struct phy *phy = *(struct phy **)res;
31
32 phy_put(phy);
33}
34
35static void devm_phy_provider_release(struct device *dev, void *res)
36{
37 struct phy_provider *phy_provider = *(struct phy_provider **)res;
38
39 of_phy_provider_unregister(phy_provider);
40}
41
42static void devm_phy_consume(struct device *dev, void *res)
43{
44 struct phy *phy = *(struct phy **)res;
45
46 phy_destroy(phy);
47}
48
49static int devm_phy_match(struct device *dev, void *res, void *match_data)
50{
Thierry Reding2f1bce42015-02-25 16:16:29 +010051 struct phy **phy = res;
52
53 return *phy == match_data;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +053054}
55
Heikki Krogerusb7bc15b2014-11-19 17:28:18 +020056/**
57 * phy_create_lookup() - allocate and register PHY/device association
58 * @phy: the phy of the association
59 * @con_id: connection ID string on device
60 * @dev_id: the device of the association
61 *
62 * Creates and registers phy_lookup entry.
63 */
64int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id)
65{
66 struct phy_lookup *pl;
67
68 if (!phy || !dev_id || !con_id)
69 return -EINVAL;
70
71 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
72 if (!pl)
73 return -ENOMEM;
74
75 pl->dev_id = dev_id;
76 pl->con_id = con_id;
77 pl->phy = phy;
78
79 mutex_lock(&phy_provider_mutex);
80 list_add_tail(&pl->node, &phys);
81 mutex_unlock(&phy_provider_mutex);
82
83 return 0;
84}
85EXPORT_SYMBOL_GPL(phy_create_lookup);
86
87/**
88 * phy_remove_lookup() - find and remove PHY/device association
89 * @phy: the phy of the association
90 * @con_id: connection ID string on device
91 * @dev_id: the device of the association
92 *
93 * Finds and unregisters phy_lookup entry that was created with
94 * phy_create_lookup().
95 */
96void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id)
97{
98 struct phy_lookup *pl;
99
100 if (!phy || !dev_id || !con_id)
101 return;
102
103 mutex_lock(&phy_provider_mutex);
104 list_for_each_entry(pl, &phys, node)
105 if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) &&
106 !strcmp(pl->con_id, con_id)) {
107 list_del(&pl->node);
108 kfree(pl);
109 break;
110 }
111 mutex_unlock(&phy_provider_mutex);
112}
113EXPORT_SYMBOL_GPL(phy_remove_lookup);
114
115static struct phy *phy_find(struct device *dev, const char *con_id)
116{
117 const char *dev_id = dev_name(dev);
118 struct phy_lookup *p, *pl = NULL;
Heikki Krogerusb7bc15b2014-11-19 17:28:18 +0200119
120 mutex_lock(&phy_provider_mutex);
121 list_for_each_entry(p, &phys, node)
122 if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) {
123 pl = p;
124 break;
125 }
126 mutex_unlock(&phy_provider_mutex);
127
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200128 return pl ? pl->phy : ERR_PTR(-ENODEV);
Heikki Krogerusb7bc15b2014-11-19 17:28:18 +0200129}
130
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530131static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
132{
133 struct phy_provider *phy_provider;
Kishon Vijay Abraham I2a4c3702014-07-14 15:55:01 +0530134 struct device_node *child;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530135
136 list_for_each_entry(phy_provider, &phy_provider_list, list) {
137 if (phy_provider->dev->of_node == node)
138 return phy_provider;
Kishon Vijay Abraham I2a4c3702014-07-14 15:55:01 +0530139
Thierry Reding1140f7c2016-04-05 17:17:34 +0200140 for_each_child_of_node(phy_provider->children, child)
Kishon Vijay Abraham I2a4c3702014-07-14 15:55:01 +0530141 if (child == node)
142 return phy_provider;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530143 }
144
145 return ERR_PTR(-EPROBE_DEFER);
146}
147
148int phy_pm_runtime_get(struct phy *phy)
149{
Felipe Balbicedb7f82013-12-20 15:00:48 -0600150 int ret;
151
Manu Gautam8866df22018-03-20 11:31:47 +0530152 if (!phy)
153 return 0;
154
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530155 if (!pm_runtime_enabled(&phy->dev))
156 return -ENOTSUPP;
157
Felipe Balbicedb7f82013-12-20 15:00:48 -0600158 ret = pm_runtime_get(&phy->dev);
159 if (ret < 0 && ret != -EINPROGRESS)
160 pm_runtime_put_noidle(&phy->dev);
161
162 return ret;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530163}
164EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
165
166int phy_pm_runtime_get_sync(struct phy *phy)
167{
Felipe Balbicedb7f82013-12-20 15:00:48 -0600168 int ret;
169
Manu Gautam8866df22018-03-20 11:31:47 +0530170 if (!phy)
171 return 0;
172
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530173 if (!pm_runtime_enabled(&phy->dev))
174 return -ENOTSUPP;
175
Felipe Balbicedb7f82013-12-20 15:00:48 -0600176 ret = pm_runtime_get_sync(&phy->dev);
177 if (ret < 0)
178 pm_runtime_put_sync(&phy->dev);
179
180 return ret;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530181}
182EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
183
184int phy_pm_runtime_put(struct phy *phy)
185{
Manu Gautam8866df22018-03-20 11:31:47 +0530186 if (!phy)
187 return 0;
188
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530189 if (!pm_runtime_enabled(&phy->dev))
190 return -ENOTSUPP;
191
192 return pm_runtime_put(&phy->dev);
193}
194EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
195
196int phy_pm_runtime_put_sync(struct phy *phy)
197{
Manu Gautam8866df22018-03-20 11:31:47 +0530198 if (!phy)
199 return 0;
200
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530201 if (!pm_runtime_enabled(&phy->dev))
202 return -ENOTSUPP;
203
204 return pm_runtime_put_sync(&phy->dev);
205}
206EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
207
208void phy_pm_runtime_allow(struct phy *phy)
209{
Manu Gautam8866df22018-03-20 11:31:47 +0530210 if (!phy)
211 return;
212
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530213 if (!pm_runtime_enabled(&phy->dev))
214 return;
215
216 pm_runtime_allow(&phy->dev);
217}
218EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
219
220void phy_pm_runtime_forbid(struct phy *phy)
221{
Manu Gautam8866df22018-03-20 11:31:47 +0530222 if (!phy)
223 return;
224
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530225 if (!pm_runtime_enabled(&phy->dev))
226 return;
227
228 pm_runtime_forbid(&phy->dev);
229}
230EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
231
232int phy_init(struct phy *phy)
233{
234 int ret;
235
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100236 if (!phy)
237 return 0;
238
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530239 ret = phy_pm_runtime_get_sync(phy);
240 if (ret < 0 && ret != -ENOTSUPP)
241 return ret;
Axel Lin736b67a32015-03-06 15:55:10 +0800242 ret = 0; /* Override possible ret == -ENOTSUPP */
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530243
244 mutex_lock(&phy->mutex);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530245 if (phy->init_count == 0 && phy->ops->init) {
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530246 ret = phy->ops->init(phy);
247 if (ret < 0) {
248 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
249 goto out;
250 }
251 }
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530252 ++phy->init_count;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530253
254out:
255 mutex_unlock(&phy->mutex);
256 phy_pm_runtime_put(phy);
257 return ret;
258}
259EXPORT_SYMBOL_GPL(phy_init);
260
261int phy_exit(struct phy *phy)
262{
263 int ret;
264
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100265 if (!phy)
266 return 0;
267
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530268 ret = phy_pm_runtime_get_sync(phy);
269 if (ret < 0 && ret != -ENOTSUPP)
270 return ret;
Axel Lin736b67a32015-03-06 15:55:10 +0800271 ret = 0; /* Override possible ret == -ENOTSUPP */
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530272
273 mutex_lock(&phy->mutex);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530274 if (phy->init_count == 1 && phy->ops->exit) {
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530275 ret = phy->ops->exit(phy);
276 if (ret < 0) {
277 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
278 goto out;
279 }
280 }
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530281 --phy->init_count;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530282
283out:
284 mutex_unlock(&phy->mutex);
285 phy_pm_runtime_put(phy);
286 return ret;
287}
288EXPORT_SYMBOL_GPL(phy_exit);
289
290int phy_power_on(struct phy *phy)
291{
Shawn Linb82fcab2016-01-28 16:14:18 +0800292 int ret = 0;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530293
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100294 if (!phy)
Shawn Linb82fcab2016-01-28 16:14:18 +0800295 goto out;
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100296
Roger Quadros3be88122014-07-04 12:55:45 +0300297 if (phy->pwr) {
298 ret = regulator_enable(phy->pwr);
299 if (ret)
Shawn Linb82fcab2016-01-28 16:14:18 +0800300 goto out;
Roger Quadros3be88122014-07-04 12:55:45 +0300301 }
302
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530303 ret = phy_pm_runtime_get_sync(phy);
304 if (ret < 0 && ret != -ENOTSUPP)
Shawn Linb82fcab2016-01-28 16:14:18 +0800305 goto err_pm_sync;
306
Axel Lin736b67a32015-03-06 15:55:10 +0800307 ret = 0; /* Override possible ret == -ENOTSUPP */
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530308
309 mutex_lock(&phy->mutex);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530310 if (phy->power_count == 0 && phy->ops->power_on) {
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530311 ret = phy->ops->power_on(phy);
312 if (ret < 0) {
313 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
Shawn Linb82fcab2016-01-28 16:14:18 +0800314 goto err_pwr_on;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530315 }
316 }
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530317 ++phy->power_count;
318 mutex_unlock(&phy->mutex);
319 return 0;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530320
Shawn Linb82fcab2016-01-28 16:14:18 +0800321err_pwr_on:
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530322 mutex_unlock(&phy->mutex);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530323 phy_pm_runtime_put_sync(phy);
Shawn Linb82fcab2016-01-28 16:14:18 +0800324err_pm_sync:
Roger Quadros3be88122014-07-04 12:55:45 +0300325 if (phy->pwr)
326 regulator_disable(phy->pwr);
Shawn Linb82fcab2016-01-28 16:14:18 +0800327out:
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530328 return ret;
329}
330EXPORT_SYMBOL_GPL(phy_power_on);
331
332int phy_power_off(struct phy *phy)
333{
Kishon Vijay Abraham Id18c9602013-12-19 20:01:44 +0530334 int ret;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530335
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100336 if (!phy)
337 return 0;
338
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530339 mutex_lock(&phy->mutex);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530340 if (phy->power_count == 1 && phy->ops->power_off) {
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530341 ret = phy->ops->power_off(phy);
342 if (ret < 0) {
343 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530344 mutex_unlock(&phy->mutex);
345 return ret;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530346 }
347 }
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530348 --phy->power_count;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530349 mutex_unlock(&phy->mutex);
350 phy_pm_runtime_put(phy);
351
Roger Quadros3be88122014-07-04 12:55:45 +0300352 if (phy->pwr)
353 regulator_disable(phy->pwr);
354
Kishon Vijay Abraham I637d378c2013-12-20 10:36:49 +0530355 return 0;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530356}
357EXPORT_SYMBOL_GPL(phy_power_off);
358
Grygorii Strashko79a5a182018-11-19 19:24:20 -0600359int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode)
David Lechner300eb012016-05-09 18:39:59 -0500360{
361 int ret;
362
363 if (!phy || !phy->ops->set_mode)
364 return 0;
365
366 mutex_lock(&phy->mutex);
Grygorii Strashko79a5a182018-11-19 19:24:20 -0600367 ret = phy->ops->set_mode(phy, mode, submode);
Manu Gautam3b3cd242018-01-16 16:27:09 +0530368 if (!ret)
369 phy->attrs.mode = mode;
David Lechner300eb012016-05-09 18:39:59 -0500370 mutex_unlock(&phy->mutex);
371
372 return ret;
373}
Grygorii Strashko79a5a182018-11-19 19:24:20 -0600374EXPORT_SYMBOL_GPL(phy_set_mode_ext);
David Lechner300eb012016-05-09 18:39:59 -0500375
Randy Licac18ec2016-09-10 02:59:37 +0800376int phy_reset(struct phy *phy)
377{
378 int ret;
379
380 if (!phy || !phy->ops->reset)
381 return 0;
382
Kishon Vijay Abraham I4df614c2019-04-05 16:38:31 +0530383 ret = phy_pm_runtime_get_sync(phy);
384 if (ret < 0 && ret != -ENOTSUPP)
385 return ret;
386
Randy Licac18ec2016-09-10 02:59:37 +0800387 mutex_lock(&phy->mutex);
388 ret = phy->ops->reset(phy);
389 mutex_unlock(&phy->mutex);
390
Kishon Vijay Abraham I4df614c2019-04-05 16:38:31 +0530391 phy_pm_runtime_put(phy);
392
Randy Licac18ec2016-09-10 02:59:37 +0800393 return ret;
394}
395EXPORT_SYMBOL_GPL(phy_reset);
396
Marek Szyprowskibbae18f2019-07-22 19:32:23 +0200397/**
398 * phy_calibrate() - Tunes the phy hw parameters for current configuration
399 * @phy: the phy returned by phy_get()
400 *
401 * Used to calibrate phy hardware, typically by adjusting some parameters in
402 * runtime, which are otherwise lost after host controller reset and cannot
403 * be applied in phy_init() or phy_power_on().
404 *
405 * Returns: 0 if successful, an negative error code otherwise
406 */
Andrzej Pietrasiewicz36914112017-10-09 14:00:50 +0200407int phy_calibrate(struct phy *phy)
408{
409 int ret;
410
411 if (!phy || !phy->ops->calibrate)
412 return 0;
413
414 mutex_lock(&phy->mutex);
415 ret = phy->ops->calibrate(phy);
416 mutex_unlock(&phy->mutex);
417
418 return ret;
419}
420EXPORT_SYMBOL_GPL(phy_calibrate);
421
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530422/**
Maxime Ripardaeaac932018-12-07 14:55:29 +0100423 * phy_configure() - Changes the phy parameters
424 * @phy: the phy returned by phy_get()
425 * @opts: New configuration to apply
426 *
427 * Used to change the PHY parameters. phy_init() must have been called
428 * on the phy. The configuration will be applied on the current phy
429 * mode, that can be changed using phy_set_mode().
430 *
431 * Returns: 0 if successful, an negative error code otherwise
432 */
433int phy_configure(struct phy *phy, union phy_configure_opts *opts)
434{
435 int ret;
436
437 if (!phy)
438 return -EINVAL;
439
440 if (!phy->ops->configure)
441 return -EOPNOTSUPP;
442
443 mutex_lock(&phy->mutex);
444 ret = phy->ops->configure(phy, opts);
445 mutex_unlock(&phy->mutex);
446
447 return ret;
448}
449EXPORT_SYMBOL_GPL(phy_configure);
450
451/**
452 * phy_validate() - Checks the phy parameters
453 * @phy: the phy returned by phy_get()
454 * @mode: phy_mode the configuration is applicable to.
455 * @submode: PHY submode the configuration is applicable to.
456 * @opts: Configuration to check
457 *
458 * Used to check that the current set of parameters can be handled by
459 * the phy. Implementations are free to tune the parameters passed as
460 * arguments if needed by some implementation detail or
461 * constraints. It will not change any actual configuration of the
462 * PHY, so calling it as many times as deemed fit will have no side
463 * effect.
464 *
465 * Returns: 0 if successful, an negative error code otherwise
466 */
467int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
468 union phy_configure_opts *opts)
469{
470 int ret;
471
472 if (!phy)
473 return -EINVAL;
474
475 if (!phy->ops->validate)
476 return -EOPNOTSUPP;
477
478 mutex_lock(&phy->mutex);
479 ret = phy->ops->validate(phy, mode, submode, opts);
480 mutex_unlock(&phy->mutex);
481
482 return ret;
483}
484EXPORT_SYMBOL_GPL(phy_validate);
485
486/**
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100487 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
488 * @np: device_node for which to get the phy
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530489 * @index: the index of the phy
490 *
491 * Returns the phy associated with the given phandle value,
492 * after getting a refcount to it or -ENODEV if there is no such phy or
493 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
494 * not yet loaded. This function uses of_xlate call back function provided
495 * while registering the phy_provider to find the phy instance.
496 */
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100497static struct phy *_of_phy_get(struct device_node *np, int index)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530498{
499 int ret;
500 struct phy_provider *phy_provider;
501 struct phy *phy = NULL;
502 struct of_phandle_args args;
503
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100504 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530505 index, &args);
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100506 if (ret)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530507 return ERR_PTR(-ENODEV);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530508
Arnd Bergmannb7563e22018-01-12 11:12:05 +0100509 /* This phy type handled by the usb-phy subsystem for now */
510 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
511 return ERR_PTR(-ENODEV);
512
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530513 mutex_lock(&phy_provider_mutex);
514 phy_provider = of_phy_provider_lookup(args.np);
515 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
516 phy = ERR_PTR(-EPROBE_DEFER);
Axel Lin33f434d2015-04-07 12:23:38 +0800517 goto out_unlock;
518 }
519
520 if (!of_device_is_available(args.np)) {
521 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
522 phy = ERR_PTR(-ENODEV);
523 goto out_put_module;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530524 }
525
526 phy = phy_provider->of_xlate(phy_provider->dev, &args);
Axel Lin33f434d2015-04-07 12:23:38 +0800527
528out_put_module:
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530529 module_put(phy_provider->owner);
530
Axel Lin33f434d2015-04-07 12:23:38 +0800531out_unlock:
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530532 mutex_unlock(&phy_provider_mutex);
533 of_node_put(args.np);
534
535 return phy;
536}
537
538/**
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100539 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
540 * @np: device_node for which to get the phy
541 * @con_id: name of the phy from device's point of view
542 *
543 * Returns the phy driver, after getting a refcount to it; or
544 * -ENODEV if there is no such phy. The caller is responsible for
545 * calling phy_put() to release that count.
546 */
547struct phy *of_phy_get(struct device_node *np, const char *con_id)
548{
549 struct phy *phy = NULL;
550 int index = 0;
551
552 if (con_id)
553 index = of_property_match_string(np, "phy-names", con_id);
554
555 phy = _of_phy_get(np, index);
556 if (IS_ERR(phy))
557 return phy;
558
559 if (!try_module_get(phy->ops->owner))
560 return ERR_PTR(-EPROBE_DEFER);
561
562 get_device(&phy->dev);
563
564 return phy;
565}
566EXPORT_SYMBOL_GPL(of_phy_get);
567
568/**
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530569 * phy_put() - release the PHY
570 * @phy: the phy returned by phy_get()
571 *
572 * Releases a refcount the caller received from phy_get().
573 */
574void phy_put(struct phy *phy)
575{
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100576 if (!phy || IS_ERR(phy))
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530577 return;
578
Kishon Vijay Abraham Ifec06b22019-04-05 16:38:30 +0530579 mutex_lock(&phy->mutex);
580 if (phy->ops->release)
581 phy->ops->release(phy);
582 mutex_unlock(&phy->mutex);
583
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530584 module_put(phy->ops->owner);
585 put_device(&phy->dev);
586}
587EXPORT_SYMBOL_GPL(phy_put);
588
589/**
590 * devm_phy_put() - release the PHY
591 * @dev: device that wants to release this phy
592 * @phy: the phy returned by devm_phy_get()
593 *
594 * destroys the devres associated with this phy and invokes phy_put
595 * to release the phy.
596 */
597void devm_phy_put(struct device *dev, struct phy *phy)
598{
599 int r;
600
Andrew Lunn04c2fac2014-02-04 18:33:11 +0100601 if (!phy)
602 return;
603
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530604 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
605 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
606}
607EXPORT_SYMBOL_GPL(devm_phy_put);
608
609/**
610 * of_phy_simple_xlate() - returns the phy instance from phy provider
611 * @dev: the PHY provider device
612 * @args: of_phandle_args (not used here)
613 *
614 * Intended to be used by phy provider for the common case where #phy-cells is
615 * 0. For other cases where #phy-cells is greater than '0', the phy provider
616 * should provide a custom of_xlate function that reads the *args* and returns
617 * the appropriate phy.
618 */
619struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
620 *args)
621{
622 struct phy *phy;
623 struct class_dev_iter iter;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530624
625 class_dev_iter_init(&iter, phy_class, NULL, NULL);
626 while ((dev = class_dev_iter_next(&iter))) {
627 phy = to_phy(dev);
Kishon Vijay Abraham I491e0492014-10-31 14:04:20 +0530628 if (args->np != phy->dev.of_node)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530629 continue;
630
631 class_dev_iter_exit(&iter);
632 return phy;
633 }
634
635 class_dev_iter_exit(&iter);
636 return ERR_PTR(-ENODEV);
637}
638EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
639
640/**
641 * phy_get() - lookup and obtain a reference to a phy.
642 * @dev: device that requests this phy
643 * @string: the phy name as given in the dt data or the name of the controller
644 * port for non-dt case
645 *
646 * Returns the phy driver, after getting a refcount to it; or
647 * -ENODEV if there is no such phy. The caller is responsible for
648 * calling phy_put() to release that count.
649 */
650struct phy *phy_get(struct device *dev, const char *string)
651{
652 int index = 0;
Kishon Vijay Abraham Id18c9602013-12-19 20:01:44 +0530653 struct phy *phy;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530654
655 if (string == NULL) {
656 dev_WARN(dev, "missing string\n");
657 return ERR_PTR(-EINVAL);
658 }
659
660 if (dev->of_node) {
661 index = of_property_match_string(dev->of_node, "phy-names",
662 string);
Kamil Debski0b3f3b22014-03-06 12:16:46 +0100663 phy = _of_phy_get(dev->of_node, index);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530664 } else {
Heikki Krogerusb7bc15b2014-11-19 17:28:18 +0200665 phy = phy_find(dev, string);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530666 }
Hans de Goedef40037f2014-02-17 14:29:22 +0530667 if (IS_ERR(phy))
668 return phy;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530669
670 if (!try_module_get(phy->ops->owner))
671 return ERR_PTR(-EPROBE_DEFER);
672
673 get_device(&phy->dev);
674
675 return phy;
676}
677EXPORT_SYMBOL_GPL(phy_get);
678
679/**
Andrew Lunn788a4d52014-02-04 18:33:12 +0100680 * phy_optional_get() - lookup and obtain a reference to an optional phy.
681 * @dev: device that requests this phy
682 * @string: the phy name as given in the dt data or the name of the controller
683 * port for non-dt case
684 *
685 * Returns the phy driver, after getting a refcount to it; or
686 * NULL if there is no such phy. The caller is responsible for
687 * calling phy_put() to release that count.
688 */
689struct phy *phy_optional_get(struct device *dev, const char *string)
690{
691 struct phy *phy = phy_get(dev, string);
692
Axel Linf83be4c2015-04-08 07:30:15 +0800693 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
Andrew Lunn788a4d52014-02-04 18:33:12 +0100694 phy = NULL;
695
696 return phy;
697}
698EXPORT_SYMBOL_GPL(phy_optional_get);
699
700/**
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530701 * devm_phy_get() - lookup and obtain a reference to a phy.
702 * @dev: device that requests this phy
703 * @string: the phy name as given in the dt data or phy device name
704 * for non-dt case
705 *
706 * Gets the phy using phy_get(), and associates a device with it using
707 * devres. On driver detach, release function is invoked on the devres data,
708 * then, devres data is freed.
709 */
710struct phy *devm_phy_get(struct device *dev, const char *string)
711{
712 struct phy **ptr, *phy;
713
714 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
715 if (!ptr)
716 return ERR_PTR(-ENOMEM);
717
718 phy = phy_get(dev, string);
719 if (!IS_ERR(phy)) {
720 *ptr = phy;
721 devres_add(dev, ptr);
722 } else {
723 devres_free(ptr);
724 }
725
726 return phy;
727}
728EXPORT_SYMBOL_GPL(devm_phy_get);
729
730/**
Andrew Lunn788a4d52014-02-04 18:33:12 +0100731 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
732 * @dev: device that requests this phy
733 * @string: the phy name as given in the dt data or phy device name
734 * for non-dt case
735 *
736 * Gets the phy using phy_get(), and associates a device with it using
737 * devres. On driver detach, release function is invoked on the devres
738 * data, then, devres data is freed. This differs to devm_phy_get() in
739 * that if the phy does not exist, it is not considered an error and
740 * -ENODEV will not be returned. Instead the NULL phy is returned,
741 * which can be passed to all other phy consumer calls.
742 */
743struct phy *devm_phy_optional_get(struct device *dev, const char *string)
744{
745 struct phy *phy = devm_phy_get(dev, string);
746
Axel Linf83be4c2015-04-08 07:30:15 +0800747 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
Andrew Lunn788a4d52014-02-04 18:33:12 +0100748 phy = NULL;
749
750 return phy;
751}
752EXPORT_SYMBOL_GPL(devm_phy_optional_get);
753
754/**
Kamil Debskib5d682f2014-03-06 12:16:47 +0100755 * devm_of_phy_get() - lookup and obtain a reference to a phy.
756 * @dev: device that requests this phy
757 * @np: node containing the phy
758 * @con_id: name of the phy from device's point of view
759 *
760 * Gets the phy using of_phy_get(), and associates a device with it using
761 * devres. On driver detach, release function is invoked on the devres data,
762 * then, devres data is freed.
763 */
764struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
765 const char *con_id)
766{
767 struct phy **ptr, *phy;
768
769 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
770 if (!ptr)
771 return ERR_PTR(-ENOMEM);
772
773 phy = of_phy_get(np, con_id);
774 if (!IS_ERR(phy)) {
775 *ptr = phy;
776 devres_add(dev, ptr);
777 } else {
778 devres_free(ptr);
779 }
780
781 return phy;
782}
783EXPORT_SYMBOL_GPL(devm_of_phy_get);
784
785/**
Arun Ramamurthy6be109b2015-04-22 16:04:11 -0700786 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
787 * @dev: device that requests this phy
788 * @np: node containing the phy
789 * @index: index of the phy
790 *
Chunfeng Yun708744622015-12-04 10:06:29 +0800791 * Gets the phy using _of_phy_get(), then gets a refcount to it,
792 * and associates a device with it using devres. On driver detach,
793 * release function is invoked on the devres data,
Arun Ramamurthy6be109b2015-04-22 16:04:11 -0700794 * then, devres data is freed.
795 *
796 */
797struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
798 int index)
799{
800 struct phy **ptr, *phy;
801
802 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
803 if (!ptr)
804 return ERR_PTR(-ENOMEM);
805
806 phy = _of_phy_get(np, index);
Chunfeng Yun708744622015-12-04 10:06:29 +0800807 if (IS_ERR(phy)) {
Arun Ramamurthy6be109b2015-04-22 16:04:11 -0700808 devres_free(ptr);
Chunfeng Yun708744622015-12-04 10:06:29 +0800809 return phy;
Arun Ramamurthy6be109b2015-04-22 16:04:11 -0700810 }
811
Chunfeng Yun708744622015-12-04 10:06:29 +0800812 if (!try_module_get(phy->ops->owner)) {
813 devres_free(ptr);
814 return ERR_PTR(-EPROBE_DEFER);
815 }
816
817 get_device(&phy->dev);
818
819 *ptr = phy;
820 devres_add(dev, ptr);
821
Arun Ramamurthy6be109b2015-04-22 16:04:11 -0700822 return phy;
823}
824EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
825
826/**
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530827 * phy_create() - create a new phy
828 * @dev: device that is creating the new phy
Kishon Vijay Abraham If0ed8172014-07-14 15:55:02 +0530829 * @node: device node of the phy
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530830 * @ops: function pointers for performing phy operations
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530831 *
832 * Called to create a phy using phy framework.
833 */
Kishon Vijay Abraham If0ed8172014-07-14 15:55:02 +0530834struct phy *phy_create(struct device *dev, struct device_node *node,
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200835 const struct phy_ops *ops)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530836{
837 int ret;
838 int id;
839 struct phy *phy;
840
Dan Carpenter52797d22013-12-06 17:51:19 +0530841 if (WARN_ON(!dev))
842 return ERR_PTR(-EINVAL);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530843
844 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
Dan Carpenter52797d22013-12-06 17:51:19 +0530845 if (!phy)
846 return ERR_PTR(-ENOMEM);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530847
848 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
849 if (id < 0) {
850 dev_err(dev, "unable to get id\n");
851 ret = id;
Dan Carpenter52797d22013-12-06 17:51:19 +0530852 goto free_phy;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530853 }
854
855 device_initialize(&phy->dev);
856 mutex_init(&phy->mutex);
857
858 phy->dev.class = phy_class;
859 phy->dev.parent = dev;
Kishon Vijay Abraham If0ed8172014-07-14 15:55:02 +0530860 phy->dev.of_node = node ?: dev->of_node;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530861 phy->id = id;
862 phy->ops = ops;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530863
864 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
865 if (ret)
Dan Carpenter52797d22013-12-06 17:51:19 +0530866 goto put_dev;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530867
Dmitry Torokhov87006dd2015-04-22 16:14:37 -0700868 /* phy-supply */
869 phy->pwr = regulator_get_optional(&phy->dev, "phy");
870 if (IS_ERR(phy->pwr)) {
871 ret = PTR_ERR(phy->pwr);
872 if (ret == -EPROBE_DEFER)
873 goto put_dev;
874
875 phy->pwr = NULL;
876 }
877
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530878 ret = device_add(&phy->dev);
879 if (ret)
Dan Carpenter52797d22013-12-06 17:51:19 +0530880 goto put_dev;
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530881
882 if (pm_runtime_enabled(dev)) {
883 pm_runtime_enable(&phy->dev);
884 pm_runtime_no_callbacks(&phy->dev);
885 }
886
887 return phy;
888
Dan Carpenter52797d22013-12-06 17:51:19 +0530889put_dev:
Roger Quadrose73b49f2014-07-10 11:55:02 +0530890 put_device(&phy->dev); /* calls phy_release() which frees resources */
891 return ERR_PTR(ret);
892
Dan Carpenter52797d22013-12-06 17:51:19 +0530893free_phy:
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530894 kfree(phy);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530895 return ERR_PTR(ret);
896}
897EXPORT_SYMBOL_GPL(phy_create);
898
899/**
900 * devm_phy_create() - create a new phy
901 * @dev: device that is creating the new phy
Kishon Vijay Abraham If0ed8172014-07-14 15:55:02 +0530902 * @node: device node of the phy
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530903 * @ops: function pointers for performing phy operations
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530904 *
905 * Creates a new PHY device adding it to the PHY class.
906 * While at that, it also associates the device with the phy using devres.
907 * On driver detach, release function is invoked on the devres data,
908 * then, devres data is freed.
909 */
Kishon Vijay Abraham If0ed8172014-07-14 15:55:02 +0530910struct phy *devm_phy_create(struct device *dev, struct device_node *node,
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200911 const struct phy_ops *ops)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530912{
913 struct phy **ptr, *phy;
914
915 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
916 if (!ptr)
917 return ERR_PTR(-ENOMEM);
918
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200919 phy = phy_create(dev, node, ops);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530920 if (!IS_ERR(phy)) {
921 *ptr = phy;
922 devres_add(dev, ptr);
923 } else {
924 devres_free(ptr);
925 }
926
927 return phy;
928}
929EXPORT_SYMBOL_GPL(devm_phy_create);
930
931/**
932 * phy_destroy() - destroy the phy
933 * @phy: the phy to be destroyed
934 *
935 * Called to destroy the phy.
936 */
937void phy_destroy(struct phy *phy)
938{
939 pm_runtime_disable(&phy->dev);
940 device_unregister(&phy->dev);
941}
942EXPORT_SYMBOL_GPL(phy_destroy);
943
944/**
945 * devm_phy_destroy() - destroy the PHY
946 * @dev: device that wants to release this phy
947 * @phy: the phy returned by devm_phy_get()
948 *
949 * destroys the devres associated with this phy and invokes phy_destroy
950 * to destroy the phy.
951 */
952void devm_phy_destroy(struct device *dev, struct phy *phy)
953{
954 int r;
955
956 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
957 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
958}
959EXPORT_SYMBOL_GPL(devm_phy_destroy);
960
961/**
962 * __of_phy_provider_register() - create/register phy provider with the framework
963 * @dev: struct device of the phy provider
Thierry Reding1140f7c2016-04-05 17:17:34 +0200964 * @children: device node containing children (if different from dev->of_node)
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530965 * @owner: the module owner containing of_xlate
966 * @of_xlate: function pointer to obtain phy instance from phy provider
967 *
968 * Creates struct phy_provider from dev and of_xlate function pointer.
969 * This is used in the case of dt boot for finding the phy instance from
970 * phy provider.
Thierry Reding1140f7c2016-04-05 17:17:34 +0200971 *
972 * If the PHY provider doesn't nest children directly but uses a separate
973 * child node to contain the individual children, the @children parameter
974 * can be used to override the default. If NULL, the default (dev->of_node)
975 * will be used. If non-NULL, the device node must be a child (or further
976 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
977 * error code is returned.
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530978 */
979struct phy_provider *__of_phy_provider_register(struct device *dev,
Thierry Reding1140f7c2016-04-05 17:17:34 +0200980 struct device_node *children, struct module *owner,
981 struct phy * (*of_xlate)(struct device *dev,
982 struct of_phandle_args *args))
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +0530983{
984 struct phy_provider *phy_provider;
985
Thierry Reding1140f7c2016-04-05 17:17:34 +0200986 /*
987 * If specified, the device node containing the children must itself
988 * be the provider's device node or a child (or further descendant)
989 * thereof.
990 */
991 if (children) {
992 struct device_node *parent = of_node_get(children), *next;
993
994 while (parent) {
995 if (parent == dev->of_node)
996 break;
997
998 next = of_get_parent(parent);
999 of_node_put(parent);
1000 parent = next;
1001 }
1002
1003 if (!parent)
1004 return ERR_PTR(-EINVAL);
1005
1006 of_node_put(parent);
1007 } else {
1008 children = dev->of_node;
1009 }
1010
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301011 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
1012 if (!phy_provider)
1013 return ERR_PTR(-ENOMEM);
1014
1015 phy_provider->dev = dev;
Thierry Reding1140f7c2016-04-05 17:17:34 +02001016 phy_provider->children = of_node_get(children);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301017 phy_provider->owner = owner;
1018 phy_provider->of_xlate = of_xlate;
1019
1020 mutex_lock(&phy_provider_mutex);
1021 list_add_tail(&phy_provider->list, &phy_provider_list);
1022 mutex_unlock(&phy_provider_mutex);
1023
1024 return phy_provider;
1025}
1026EXPORT_SYMBOL_GPL(__of_phy_provider_register);
1027
1028/**
1029 * __devm_of_phy_provider_register() - create/register phy provider with the
1030 * framework
1031 * @dev: struct device of the phy provider
1032 * @owner: the module owner containing of_xlate
1033 * @of_xlate: function pointer to obtain phy instance from phy provider
1034 *
1035 * Creates struct phy_provider from dev and of_xlate function pointer.
1036 * This is used in the case of dt boot for finding the phy instance from
1037 * phy provider. While at that, it also associates the device with the
1038 * phy provider using devres. On driver detach, release function is invoked
1039 * on the devres data, then, devres data is freed.
1040 */
1041struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
Thierry Reding1140f7c2016-04-05 17:17:34 +02001042 struct device_node *children, struct module *owner,
1043 struct phy * (*of_xlate)(struct device *dev,
1044 struct of_phandle_args *args))
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301045{
1046 struct phy_provider **ptr, *phy_provider;
1047
1048 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
1049 if (!ptr)
1050 return ERR_PTR(-ENOMEM);
1051
Thierry Reding1140f7c2016-04-05 17:17:34 +02001052 phy_provider = __of_phy_provider_register(dev, children, owner,
1053 of_xlate);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301054 if (!IS_ERR(phy_provider)) {
1055 *ptr = phy_provider;
1056 devres_add(dev, ptr);
1057 } else {
1058 devres_free(ptr);
1059 }
1060
1061 return phy_provider;
1062}
1063EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
1064
1065/**
1066 * of_phy_provider_unregister() - unregister phy provider from the framework
1067 * @phy_provider: phy provider returned by of_phy_provider_register()
1068 *
1069 * Removes the phy_provider created using of_phy_provider_register().
1070 */
1071void of_phy_provider_unregister(struct phy_provider *phy_provider)
1072{
1073 if (IS_ERR(phy_provider))
1074 return;
1075
1076 mutex_lock(&phy_provider_mutex);
1077 list_del(&phy_provider->list);
Thierry Reding1140f7c2016-04-05 17:17:34 +02001078 of_node_put(phy_provider->children);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301079 kfree(phy_provider);
1080 mutex_unlock(&phy_provider_mutex);
1081}
1082EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1083
1084/**
1085 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1086 * @dev: struct device of the phy provider
1087 *
1088 * destroys the devres associated with this phy provider and invokes
1089 * of_phy_provider_unregister to unregister the phy provider.
1090 */
1091void devm_of_phy_provider_unregister(struct device *dev,
1092 struct phy_provider *phy_provider) {
1093 int r;
1094
1095 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
1096 phy_provider);
1097 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1098}
1099EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1100
1101/**
1102 * phy_release() - release the phy
1103 * @dev: the dev member within phy
1104 *
1105 * When the last reference to the device is removed, it is called
1106 * from the embedded kobject as release method.
1107 */
1108static void phy_release(struct device *dev)
1109{
1110 struct phy *phy;
1111
1112 phy = to_phy(dev);
1113 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
Roger Quadros3be88122014-07-04 12:55:45 +03001114 regulator_put(phy->pwr);
Roger Quadrose73b49f2014-07-10 11:55:02 +05301115 ida_simple_remove(&phy_ida, phy->id);
Kishon Vijay Abraham Iff764962013-09-27 11:53:25 +05301116 kfree(phy);
1117}
1118
1119static int __init phy_core_init(void)
1120{
1121 phy_class = class_create(THIS_MODULE, "phy");
1122 if (IS_ERR(phy_class)) {
1123 pr_err("failed to create phy class --> %ld\n",
1124 PTR_ERR(phy_class));
1125 return PTR_ERR(phy_class);
1126 }
1127
1128 phy_class->dev_release = phy_release;
1129
1130 return 0;
1131}
Paul Gortmakercc013c22018-12-09 19:34:48 -05001132device_initcall(phy_core_init);