1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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> |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/export.h> |
12 | #include <linux/module.h> |
13 | #include <linux/err.h> |
14 | #include <linux/debugfs.h> |
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> |
21 | #include <linux/regulator/consumer.h> |
22 | |
23 | static struct class *phy_class; |
24 | static struct dentry *phy_debugfs_root; |
25 | static DEFINE_MUTEX(phy_provider_mutex); |
26 | static LIST_HEAD(phy_provider_list); |
27 | static LIST_HEAD(phys); |
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(dev, 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 | struct phy **phy = res; |
54 | |
55 | return *phy == match_data; |
56 | } |
57 | |
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(size: 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(new: &pl->node, head: &phys); |
83 | mutex_unlock(lock: &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(entry: &pl->node); |
110 | kfree(objp: pl); |
111 | break; |
112 | } |
113 | mutex_unlock(lock: &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; |
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(lock: &phy_provider_mutex); |
129 | |
130 | return pl ? pl->phy : ERR_PTR(error: -ENODEV); |
131 | } |
132 | |
133 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
134 | { |
135 | struct phy_provider *phy_provider; |
136 | struct device_node *child; |
137 | |
138 | list_for_each_entry(phy_provider, &phy_provider_list, list) { |
139 | if (phy_provider->dev->of_node == node) |
140 | return phy_provider; |
141 | |
142 | for_each_child_of_node(phy_provider->children, child) |
143 | if (child == node) |
144 | return phy_provider; |
145 | } |
146 | |
147 | return ERR_PTR(error: -EPROBE_DEFER); |
148 | } |
149 | |
150 | int phy_pm_runtime_get(struct phy *phy) |
151 | { |
152 | int ret; |
153 | |
154 | if (!phy) |
155 | return 0; |
156 | |
157 | if (!pm_runtime_enabled(dev: &phy->dev)) |
158 | return -ENOTSUPP; |
159 | |
160 | ret = pm_runtime_get(dev: &phy->dev); |
161 | if (ret < 0 && ret != -EINPROGRESS) |
162 | pm_runtime_put_noidle(dev: &phy->dev); |
163 | |
164 | return ret; |
165 | } |
166 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); |
167 | |
168 | int phy_pm_runtime_get_sync(struct phy *phy) |
169 | { |
170 | int ret; |
171 | |
172 | if (!phy) |
173 | return 0; |
174 | |
175 | if (!pm_runtime_enabled(dev: &phy->dev)) |
176 | return -ENOTSUPP; |
177 | |
178 | ret = pm_runtime_get_sync(dev: &phy->dev); |
179 | if (ret < 0) |
180 | pm_runtime_put_sync(dev: &phy->dev); |
181 | |
182 | return ret; |
183 | } |
184 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); |
185 | |
186 | int phy_pm_runtime_put(struct phy *phy) |
187 | { |
188 | if (!phy) |
189 | return 0; |
190 | |
191 | if (!pm_runtime_enabled(dev: &phy->dev)) |
192 | return -ENOTSUPP; |
193 | |
194 | return pm_runtime_put(dev: &phy->dev); |
195 | } |
196 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); |
197 | |
198 | int phy_pm_runtime_put_sync(struct phy *phy) |
199 | { |
200 | if (!phy) |
201 | return 0; |
202 | |
203 | if (!pm_runtime_enabled(dev: &phy->dev)) |
204 | return -ENOTSUPP; |
205 | |
206 | return pm_runtime_put_sync(dev: &phy->dev); |
207 | } |
208 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); |
209 | |
210 | void phy_pm_runtime_allow(struct phy *phy) |
211 | { |
212 | if (!phy) |
213 | return; |
214 | |
215 | if (!pm_runtime_enabled(dev: &phy->dev)) |
216 | return; |
217 | |
218 | pm_runtime_allow(dev: &phy->dev); |
219 | } |
220 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); |
221 | |
222 | void phy_pm_runtime_forbid(struct phy *phy) |
223 | { |
224 | if (!phy) |
225 | return; |
226 | |
227 | if (!pm_runtime_enabled(dev: &phy->dev)) |
228 | return; |
229 | |
230 | pm_runtime_forbid(dev: &phy->dev); |
231 | } |
232 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); |
233 | |
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 | */ |
245 | int phy_init(struct phy *phy) |
246 | { |
247 | int ret; |
248 | |
249 | if (!phy) |
250 | return 0; |
251 | |
252 | ret = phy_pm_runtime_get_sync(phy); |
253 | if (ret < 0 && ret != -ENOTSUPP) |
254 | return ret; |
255 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
256 | |
257 | mutex_lock(&phy->mutex); |
258 | if (phy->power_count > phy->init_count) |
259 | dev_warn(&phy->dev, "phy_power_on was called before phy_init\n" ); |
260 | |
261 | if (phy->init_count == 0 && phy->ops->init) { |
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 | } |
268 | ++phy->init_count; |
269 | |
270 | out: |
271 | mutex_unlock(lock: &phy->mutex); |
272 | phy_pm_runtime_put(phy); |
273 | return ret; |
274 | } |
275 | EXPORT_SYMBOL_GPL(phy_init); |
276 | |
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 | */ |
285 | int phy_exit(struct phy *phy) |
286 | { |
287 | int ret; |
288 | |
289 | if (!phy) |
290 | return 0; |
291 | |
292 | ret = phy_pm_runtime_get_sync(phy); |
293 | if (ret < 0 && ret != -ENOTSUPP) |
294 | return ret; |
295 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
296 | |
297 | mutex_lock(&phy->mutex); |
298 | if (phy->init_count == 1 && phy->ops->exit) { |
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 | } |
305 | --phy->init_count; |
306 | |
307 | out: |
308 | mutex_unlock(lock: &phy->mutex); |
309 | phy_pm_runtime_put(phy); |
310 | return ret; |
311 | } |
312 | EXPORT_SYMBOL_GPL(phy_exit); |
313 | |
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 | */ |
322 | int phy_power_on(struct phy *phy) |
323 | { |
324 | int ret = 0; |
325 | |
326 | if (!phy) |
327 | goto out; |
328 | |
329 | if (phy->pwr) { |
330 | ret = regulator_enable(regulator: phy->pwr); |
331 | if (ret) |
332 | goto out; |
333 | } |
334 | |
335 | ret = phy_pm_runtime_get_sync(phy); |
336 | if (ret < 0 && ret != -ENOTSUPP) |
337 | goto err_pm_sync; |
338 | |
339 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
340 | |
341 | mutex_lock(&phy->mutex); |
342 | if (phy->power_count == 0 && phy->ops->power_on) { |
343 | ret = phy->ops->power_on(phy); |
344 | if (ret < 0) { |
345 | dev_err(&phy->dev, "phy poweron failed --> %d\n" , ret); |
346 | goto err_pwr_on; |
347 | } |
348 | } |
349 | ++phy->power_count; |
350 | mutex_unlock(lock: &phy->mutex); |
351 | return 0; |
352 | |
353 | err_pwr_on: |
354 | mutex_unlock(lock: &phy->mutex); |
355 | phy_pm_runtime_put_sync(phy); |
356 | err_pm_sync: |
357 | if (phy->pwr) |
358 | regulator_disable(regulator: phy->pwr); |
359 | out: |
360 | return ret; |
361 | } |
362 | EXPORT_SYMBOL_GPL(phy_power_on); |
363 | |
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 | */ |
372 | int phy_power_off(struct phy *phy) |
373 | { |
374 | int ret; |
375 | |
376 | if (!phy) |
377 | return 0; |
378 | |
379 | mutex_lock(&phy->mutex); |
380 | if (phy->power_count == 1 && phy->ops->power_off) { |
381 | ret = phy->ops->power_off(phy); |
382 | if (ret < 0) { |
383 | dev_err(&phy->dev, "phy poweroff failed --> %d\n" , ret); |
384 | mutex_unlock(lock: &phy->mutex); |
385 | return ret; |
386 | } |
387 | } |
388 | --phy->power_count; |
389 | mutex_unlock(lock: &phy->mutex); |
390 | phy_pm_runtime_put(phy); |
391 | |
392 | if (phy->pwr) |
393 | regulator_disable(regulator: phy->pwr); |
394 | |
395 | return 0; |
396 | } |
397 | EXPORT_SYMBOL_GPL(phy_power_off); |
398 | |
399 | int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) |
400 | { |
401 | int ret; |
402 | |
403 | if (!phy || !phy->ops->set_mode) |
404 | return 0; |
405 | |
406 | mutex_lock(&phy->mutex); |
407 | ret = phy->ops->set_mode(phy, mode, submode); |
408 | if (!ret) |
409 | phy->attrs.mode = mode; |
410 | mutex_unlock(lock: &phy->mutex); |
411 | |
412 | return ret; |
413 | } |
414 | EXPORT_SYMBOL_GPL(phy_set_mode_ext); |
415 | |
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(lock: &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(lock: &phy->mutex); |
441 | |
442 | return ret; |
443 | } |
444 | EXPORT_SYMBOL_GPL(phy_set_speed); |
445 | |
446 | int phy_reset(struct phy *phy) |
447 | { |
448 | int ret; |
449 | |
450 | if (!phy || !phy->ops->reset) |
451 | return 0; |
452 | |
453 | ret = phy_pm_runtime_get_sync(phy); |
454 | if (ret < 0 && ret != -ENOTSUPP) |
455 | return ret; |
456 | |
457 | mutex_lock(&phy->mutex); |
458 | ret = phy->ops->reset(phy); |
459 | mutex_unlock(lock: &phy->mutex); |
460 | |
461 | phy_pm_runtime_put(phy); |
462 | |
463 | return ret; |
464 | } |
465 | EXPORT_SYMBOL_GPL(phy_reset); |
466 | |
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 | * |
475 | * Return: %0 if successful, a negative error code otherwise |
476 | */ |
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(lock: &phy->mutex); |
487 | |
488 | return ret; |
489 | } |
490 | EXPORT_SYMBOL_GPL(phy_calibrate); |
491 | |
492 | /** |
493 | * phy_notify_connect() - phy connect notification |
494 | * @phy: the phy returned by phy_get() |
495 | * @port: the port index for connect |
496 | * |
497 | * If the phy needs to get connection status, the callback can be used. |
498 | * Returns: %0 if successful, a negative error code otherwise |
499 | */ |
500 | int phy_notify_connect(struct phy *phy, int port) |
501 | { |
502 | int ret; |
503 | |
504 | if (!phy || !phy->ops->connect) |
505 | return 0; |
506 | |
507 | mutex_lock(&phy->mutex); |
508 | ret = phy->ops->connect(phy, port); |
509 | mutex_unlock(lock: &phy->mutex); |
510 | |
511 | return ret; |
512 | } |
513 | EXPORT_SYMBOL_GPL(phy_notify_connect); |
514 | |
515 | /** |
516 | * phy_notify_disconnect() - phy disconnect notification |
517 | * @phy: the phy returned by phy_get() |
518 | * @port: the port index for disconnect |
519 | * |
520 | * If the phy needs to get connection status, the callback can be used. |
521 | * |
522 | * Returns: %0 if successful, a negative error code otherwise |
523 | */ |
524 | int phy_notify_disconnect(struct phy *phy, int port) |
525 | { |
526 | int ret; |
527 | |
528 | if (!phy || !phy->ops->disconnect) |
529 | return 0; |
530 | |
531 | mutex_lock(&phy->mutex); |
532 | ret = phy->ops->disconnect(phy, port); |
533 | mutex_unlock(lock: &phy->mutex); |
534 | |
535 | return ret; |
536 | } |
537 | EXPORT_SYMBOL_GPL(phy_notify_disconnect); |
538 | |
539 | /** |
540 | * phy_configure() - Changes the phy parameters |
541 | * @phy: the phy returned by phy_get() |
542 | * @opts: New configuration to apply |
543 | * |
544 | * Used to change the PHY parameters. phy_init() must have been called |
545 | * on the phy. The configuration will be applied on the current phy |
546 | * mode, that can be changed using phy_set_mode(). |
547 | * |
548 | * Return: %0 if successful, a negative error code otherwise |
549 | */ |
550 | int phy_configure(struct phy *phy, union phy_configure_opts *opts) |
551 | { |
552 | int ret; |
553 | |
554 | if (!phy) |
555 | return -EINVAL; |
556 | |
557 | if (!phy->ops->configure) |
558 | return -EOPNOTSUPP; |
559 | |
560 | mutex_lock(&phy->mutex); |
561 | ret = phy->ops->configure(phy, opts); |
562 | mutex_unlock(lock: &phy->mutex); |
563 | |
564 | return ret; |
565 | } |
566 | EXPORT_SYMBOL_GPL(phy_configure); |
567 | |
568 | /** |
569 | * phy_validate() - Checks the phy parameters |
570 | * @phy: the phy returned by phy_get() |
571 | * @mode: phy_mode the configuration is applicable to. |
572 | * @submode: PHY submode the configuration is applicable to. |
573 | * @opts: Configuration to check |
574 | * |
575 | * Used to check that the current set of parameters can be handled by |
576 | * the phy. Implementations are free to tune the parameters passed as |
577 | * arguments if needed by some implementation detail or |
578 | * constraints. It will not change any actual configuration of the |
579 | * PHY, so calling it as many times as deemed fit will have no side |
580 | * effect. |
581 | * |
582 | * Return: %0 if successful, a negative error code otherwise |
583 | */ |
584 | int phy_validate(struct phy *phy, enum phy_mode mode, int submode, |
585 | union phy_configure_opts *opts) |
586 | { |
587 | int ret; |
588 | |
589 | if (!phy) |
590 | return -EINVAL; |
591 | |
592 | if (!phy->ops->validate) |
593 | return -EOPNOTSUPP; |
594 | |
595 | mutex_lock(&phy->mutex); |
596 | ret = phy->ops->validate(phy, mode, submode, opts); |
597 | mutex_unlock(lock: &phy->mutex); |
598 | |
599 | return ret; |
600 | } |
601 | EXPORT_SYMBOL_GPL(phy_validate); |
602 | |
603 | /** |
604 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
605 | * @np: device_node for which to get the phy |
606 | * @index: the index of the phy |
607 | * |
608 | * Returns the phy associated with the given phandle value, |
609 | * after getting a refcount to it or -ENODEV if there is no such phy or |
610 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is |
611 | * not yet loaded. This function uses of_xlate call back function provided |
612 | * while registering the phy_provider to find the phy instance. |
613 | */ |
614 | static struct phy *_of_phy_get(struct device_node *np, int index) |
615 | { |
616 | int ret; |
617 | struct phy_provider *phy_provider; |
618 | struct phy *phy = NULL; |
619 | struct of_phandle_args args; |
620 | |
621 | ret = of_parse_phandle_with_args(np, list_name: "phys" , cells_name: "#phy-cells" , |
622 | index, out_args: &args); |
623 | if (ret) |
624 | return ERR_PTR(error: -ENODEV); |
625 | |
626 | /* This phy type handled by the usb-phy subsystem for now */ |
627 | if (of_device_is_compatible(device: args.np, "usb-nop-xceiv" )) |
628 | return ERR_PTR(error: -ENODEV); |
629 | |
630 | mutex_lock(&phy_provider_mutex); |
631 | phy_provider = of_phy_provider_lookup(node: args.np); |
632 | if (IS_ERR(ptr: phy_provider) || !try_module_get(module: phy_provider->owner)) { |
633 | phy = ERR_PTR(error: -EPROBE_DEFER); |
634 | goto out_unlock; |
635 | } |
636 | |
637 | if (!of_device_is_available(device: args.np)) { |
638 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n" ); |
639 | phy = ERR_PTR(error: -ENODEV); |
640 | goto out_put_module; |
641 | } |
642 | |
643 | phy = phy_provider->of_xlate(phy_provider->dev, &args); |
644 | |
645 | out_put_module: |
646 | module_put(module: phy_provider->owner); |
647 | |
648 | out_unlock: |
649 | mutex_unlock(lock: &phy_provider_mutex); |
650 | of_node_put(node: args.np); |
651 | |
652 | return phy; |
653 | } |
654 | |
655 | /** |
656 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. |
657 | * @np: device_node for which to get the phy |
658 | * @con_id: name of the phy from device's point of view |
659 | * |
660 | * Returns the phy driver, after getting a refcount to it; or |
661 | * -ENODEV if there is no such phy. The caller is responsible for |
662 | * calling phy_put() to release that count. |
663 | */ |
664 | struct phy *of_phy_get(struct device_node *np, const char *con_id) |
665 | { |
666 | struct phy *phy = NULL; |
667 | int index = 0; |
668 | |
669 | if (con_id) |
670 | index = of_property_match_string(np, propname: "phy-names" , string: con_id); |
671 | |
672 | phy = _of_phy_get(np, index); |
673 | if (IS_ERR(ptr: phy)) |
674 | return phy; |
675 | |
676 | if (!try_module_get(module: phy->ops->owner)) |
677 | return ERR_PTR(error: -EPROBE_DEFER); |
678 | |
679 | get_device(dev: &phy->dev); |
680 | |
681 | return phy; |
682 | } |
683 | EXPORT_SYMBOL_GPL(of_phy_get); |
684 | |
685 | /** |
686 | * of_phy_put() - release the PHY |
687 | * @phy: the phy returned by of_phy_get() |
688 | * |
689 | * Releases a refcount the caller received from of_phy_get(). |
690 | */ |
691 | void of_phy_put(struct phy *phy) |
692 | { |
693 | if (!phy || IS_ERR(ptr: phy)) |
694 | return; |
695 | |
696 | mutex_lock(&phy->mutex); |
697 | if (phy->ops->release) |
698 | phy->ops->release(phy); |
699 | mutex_unlock(lock: &phy->mutex); |
700 | |
701 | module_put(module: phy->ops->owner); |
702 | put_device(dev: &phy->dev); |
703 | } |
704 | EXPORT_SYMBOL_GPL(of_phy_put); |
705 | |
706 | /** |
707 | * phy_put() - release the PHY |
708 | * @dev: device that wants to release this phy |
709 | * @phy: the phy returned by phy_get() |
710 | * |
711 | * Releases a refcount the caller received from phy_get(). |
712 | */ |
713 | void phy_put(struct device *dev, struct phy *phy) |
714 | { |
715 | device_link_remove(consumer: dev, supplier: &phy->dev); |
716 | of_phy_put(phy); |
717 | } |
718 | EXPORT_SYMBOL_GPL(phy_put); |
719 | |
720 | /** |
721 | * devm_phy_put() - release the PHY |
722 | * @dev: device that wants to release this phy |
723 | * @phy: the phy returned by devm_phy_get() |
724 | * |
725 | * destroys the devres associated with this phy and invokes phy_put |
726 | * to release the phy. |
727 | */ |
728 | void devm_phy_put(struct device *dev, struct phy *phy) |
729 | { |
730 | int r; |
731 | |
732 | if (!phy) |
733 | return; |
734 | |
735 | r = devres_destroy(dev, release: devm_phy_release, match: devm_phy_match, match_data: phy); |
736 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n" ); |
737 | } |
738 | EXPORT_SYMBOL_GPL(devm_phy_put); |
739 | |
740 | /** |
741 | * of_phy_simple_xlate() - returns the phy instance from phy provider |
742 | * @dev: the PHY provider device |
743 | * @args: of_phandle_args (not used here) |
744 | * |
745 | * Intended to be used by phy provider for the common case where #phy-cells is |
746 | * 0. For other cases where #phy-cells is greater than '0', the phy provider |
747 | * should provide a custom of_xlate function that reads the *args* and returns |
748 | * the appropriate phy. |
749 | */ |
750 | struct phy *of_phy_simple_xlate(struct device *dev, |
751 | const struct of_phandle_args *args) |
752 | { |
753 | struct phy *phy; |
754 | struct class_dev_iter iter; |
755 | |
756 | class_dev_iter_init(iter: &iter, class: phy_class, NULL, NULL); |
757 | while ((dev = class_dev_iter_next(iter: &iter))) { |
758 | phy = to_phy(dev); |
759 | if (args->np != phy->dev.of_node) |
760 | continue; |
761 | |
762 | class_dev_iter_exit(iter: &iter); |
763 | return phy; |
764 | } |
765 | |
766 | class_dev_iter_exit(iter: &iter); |
767 | return ERR_PTR(error: -ENODEV); |
768 | } |
769 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); |
770 | |
771 | /** |
772 | * 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 the name of the controller |
775 | * port for non-dt case |
776 | * |
777 | * Returns the phy driver, after getting a refcount to it; or |
778 | * -ENODEV if there is no such phy. The caller is responsible for |
779 | * calling phy_put() to release that count. |
780 | */ |
781 | struct phy *phy_get(struct device *dev, const char *string) |
782 | { |
783 | int index = 0; |
784 | struct phy *phy; |
785 | struct device_link *link; |
786 | |
787 | if (dev->of_node) { |
788 | if (string) |
789 | index = of_property_match_string(np: dev->of_node, propname: "phy-names" , |
790 | string); |
791 | else |
792 | index = 0; |
793 | phy = _of_phy_get(np: dev->of_node, index); |
794 | } else { |
795 | if (string == NULL) { |
796 | dev_WARN(dev, "missing string\n" ); |
797 | return ERR_PTR(error: -EINVAL); |
798 | } |
799 | phy = phy_find(dev, con_id: string); |
800 | } |
801 | if (IS_ERR(ptr: phy)) |
802 | return phy; |
803 | |
804 | if (!try_module_get(module: phy->ops->owner)) |
805 | return ERR_PTR(error: -EPROBE_DEFER); |
806 | |
807 | get_device(dev: &phy->dev); |
808 | |
809 | link = device_link_add(consumer: dev, supplier: &phy->dev, DL_FLAG_STATELESS); |
810 | if (!link) |
811 | dev_dbg(dev, "failed to create device link to %s\n" , |
812 | dev_name(phy->dev.parent)); |
813 | |
814 | return phy; |
815 | } |
816 | EXPORT_SYMBOL_GPL(phy_get); |
817 | |
818 | /** |
819 | * devm_phy_get() - lookup and obtain a reference to a phy. |
820 | * @dev: device that requests this phy |
821 | * @string: the phy name as given in the dt data or phy device name |
822 | * for non-dt case |
823 | * |
824 | * Gets the phy using phy_get(), and associates a device with it using |
825 | * devres. On driver detach, release function is invoked on the devres data, |
826 | * then, devres data is freed. |
827 | */ |
828 | struct phy *devm_phy_get(struct device *dev, const char *string) |
829 | { |
830 | struct phy **ptr, *phy; |
831 | |
832 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
833 | if (!ptr) |
834 | return ERR_PTR(error: -ENOMEM); |
835 | |
836 | phy = phy_get(dev, string); |
837 | if (!IS_ERR(ptr: phy)) { |
838 | *ptr = phy; |
839 | devres_add(dev, res: ptr); |
840 | } else { |
841 | devres_free(res: ptr); |
842 | } |
843 | |
844 | return phy; |
845 | } |
846 | EXPORT_SYMBOL_GPL(devm_phy_get); |
847 | |
848 | /** |
849 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. |
850 | * @dev: device that requests this phy |
851 | * @string: the phy name as given in the dt data or phy device name |
852 | * for non-dt case |
853 | * |
854 | * Gets the phy using phy_get(), and associates a device with it using |
855 | * devres. On driver detach, release function is invoked on the devres |
856 | * data, then, devres data is freed. This differs to devm_phy_get() in |
857 | * that if the phy does not exist, it is not considered an error and |
858 | * -ENODEV will not be returned. Instead the NULL phy is returned, |
859 | * which can be passed to all other phy consumer calls. |
860 | */ |
861 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) |
862 | { |
863 | struct phy *phy = devm_phy_get(dev, string); |
864 | |
865 | if (PTR_ERR(ptr: phy) == -ENODEV) |
866 | phy = NULL; |
867 | |
868 | return phy; |
869 | } |
870 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); |
871 | |
872 | /** |
873 | * devm_of_phy_get() - lookup and obtain a reference to a phy. |
874 | * @dev: device that requests this phy |
875 | * @np: node containing the phy |
876 | * @con_id: name of the phy from device's point of view |
877 | * |
878 | * Gets the phy using of_phy_get(), and associates a device with it using |
879 | * devres. On driver detach, release function is invoked on the devres data, |
880 | * then, devres data is freed. |
881 | */ |
882 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, |
883 | const char *con_id) |
884 | { |
885 | struct phy **ptr, *phy; |
886 | struct device_link *link; |
887 | |
888 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
889 | if (!ptr) |
890 | return ERR_PTR(error: -ENOMEM); |
891 | |
892 | phy = of_phy_get(np, con_id); |
893 | if (!IS_ERR(ptr: phy)) { |
894 | *ptr = phy; |
895 | devres_add(dev, res: ptr); |
896 | } else { |
897 | devres_free(res: ptr); |
898 | return phy; |
899 | } |
900 | |
901 | link = device_link_add(consumer: dev, supplier: &phy->dev, DL_FLAG_STATELESS); |
902 | if (!link) |
903 | dev_dbg(dev, "failed to create device link to %s\n" , |
904 | dev_name(phy->dev.parent)); |
905 | |
906 | return phy; |
907 | } |
908 | EXPORT_SYMBOL_GPL(devm_of_phy_get); |
909 | |
910 | /** |
911 | * devm_of_phy_optional_get() - lookup and obtain a reference to an optional |
912 | * phy. |
913 | * @dev: device that requests this phy |
914 | * @np: node containing the phy |
915 | * @con_id: name of the phy from device's point of view |
916 | * |
917 | * Gets the phy using of_phy_get(), and associates a device with it using |
918 | * devres. On driver detach, release function is invoked on the devres data, |
919 | * then, devres data is freed. This differs to devm_of_phy_get() in |
920 | * that if the phy does not exist, it is not considered an error and |
921 | * -ENODEV will not be returned. Instead the NULL phy is returned, |
922 | * which can be passed to all other phy consumer calls. |
923 | */ |
924 | struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np, |
925 | const char *con_id) |
926 | { |
927 | struct phy *phy = devm_of_phy_get(dev, np, con_id); |
928 | |
929 | if (PTR_ERR(ptr: phy) == -ENODEV) |
930 | phy = NULL; |
931 | |
932 | if (IS_ERR(ptr: phy)) |
933 | dev_err_probe(dev, err: PTR_ERR(ptr: phy), fmt: "failed to get PHY %pOF:%s" , |
934 | np, con_id); |
935 | |
936 | return phy; |
937 | } |
938 | EXPORT_SYMBOL_GPL(devm_of_phy_optional_get); |
939 | |
940 | /** |
941 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. |
942 | * @dev: device that requests this phy |
943 | * @np: node containing the phy |
944 | * @index: index of the phy |
945 | * |
946 | * Gets the phy using _of_phy_get(), then gets a refcount to it, |
947 | * and associates a device with it using devres. On driver detach, |
948 | * release function is invoked on the devres data, |
949 | * then, devres data is freed. |
950 | * |
951 | */ |
952 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, |
953 | int index) |
954 | { |
955 | struct phy **ptr, *phy; |
956 | struct device_link *link; |
957 | |
958 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
959 | if (!ptr) |
960 | return ERR_PTR(error: -ENOMEM); |
961 | |
962 | phy = _of_phy_get(np, index); |
963 | if (IS_ERR(ptr: phy)) { |
964 | devres_free(res: ptr); |
965 | return phy; |
966 | } |
967 | |
968 | if (!try_module_get(module: phy->ops->owner)) { |
969 | devres_free(res: ptr); |
970 | return ERR_PTR(error: -EPROBE_DEFER); |
971 | } |
972 | |
973 | get_device(dev: &phy->dev); |
974 | |
975 | *ptr = phy; |
976 | devres_add(dev, res: ptr); |
977 | |
978 | link = device_link_add(consumer: dev, supplier: &phy->dev, DL_FLAG_STATELESS); |
979 | if (!link) |
980 | dev_dbg(dev, "failed to create device link to %s\n" , |
981 | dev_name(phy->dev.parent)); |
982 | |
983 | return phy; |
984 | } |
985 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); |
986 | |
987 | /** |
988 | * phy_create() - create a new phy |
989 | * @dev: device that is creating the new phy |
990 | * @node: device node of the phy |
991 | * @ops: function pointers for performing phy operations |
992 | * |
993 | * Called to create a phy using phy framework. |
994 | */ |
995 | struct phy *phy_create(struct device *dev, struct device_node *node, |
996 | const struct phy_ops *ops) |
997 | { |
998 | int ret; |
999 | int id; |
1000 | struct phy *phy; |
1001 | |
1002 | if (WARN_ON(!dev)) |
1003 | return ERR_PTR(error: -EINVAL); |
1004 | |
1005 | phy = kzalloc(size: sizeof(*phy), GFP_KERNEL); |
1006 | if (!phy) |
1007 | return ERR_PTR(error: -ENOMEM); |
1008 | |
1009 | id = ida_alloc(ida: &phy_ida, GFP_KERNEL); |
1010 | if (id < 0) { |
1011 | dev_err(dev, "unable to get id\n" ); |
1012 | ret = id; |
1013 | goto free_phy; |
1014 | } |
1015 | |
1016 | device_initialize(dev: &phy->dev); |
1017 | mutex_init(&phy->mutex); |
1018 | |
1019 | phy->dev.class = phy_class; |
1020 | phy->dev.parent = dev; |
1021 | phy->dev.of_node = node ?: dev->of_node; |
1022 | phy->id = id; |
1023 | phy->ops = ops; |
1024 | |
1025 | ret = dev_set_name(dev: &phy->dev, name: "phy-%s.%d" , dev_name(dev), id); |
1026 | if (ret) |
1027 | goto put_dev; |
1028 | |
1029 | /* phy-supply */ |
1030 | phy->pwr = regulator_get_optional(dev: &phy->dev, id: "phy" ); |
1031 | if (IS_ERR(ptr: phy->pwr)) { |
1032 | ret = PTR_ERR(ptr: phy->pwr); |
1033 | if (ret == -EPROBE_DEFER) |
1034 | goto put_dev; |
1035 | |
1036 | phy->pwr = NULL; |
1037 | } |
1038 | |
1039 | ret = device_add(dev: &phy->dev); |
1040 | if (ret) |
1041 | goto put_dev; |
1042 | |
1043 | if (pm_runtime_enabled(dev)) { |
1044 | pm_runtime_enable(dev: &phy->dev); |
1045 | pm_runtime_no_callbacks(dev: &phy->dev); |
1046 | } |
1047 | |
1048 | phy->debugfs = debugfs_create_dir(name: dev_name(dev: &phy->dev), parent: phy_debugfs_root); |
1049 | |
1050 | return phy; |
1051 | |
1052 | put_dev: |
1053 | put_device(dev: &phy->dev); /* calls phy_release() which frees resources */ |
1054 | return ERR_PTR(error: ret); |
1055 | |
1056 | free_phy: |
1057 | kfree(objp: phy); |
1058 | return ERR_PTR(error: ret); |
1059 | } |
1060 | EXPORT_SYMBOL_GPL(phy_create); |
1061 | |
1062 | /** |
1063 | * devm_phy_create() - create a new phy |
1064 | * @dev: device that is creating the new phy |
1065 | * @node: device node of the phy |
1066 | * @ops: function pointers for performing phy operations |
1067 | * |
1068 | * Creates a new PHY device adding it to the PHY class. |
1069 | * While at that, it also associates the device with the phy using devres. |
1070 | * On driver detach, release function is invoked on the devres data, |
1071 | * then, devres data is freed. |
1072 | */ |
1073 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
1074 | const struct phy_ops *ops) |
1075 | { |
1076 | struct phy **ptr, *phy; |
1077 | |
1078 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); |
1079 | if (!ptr) |
1080 | return ERR_PTR(error: -ENOMEM); |
1081 | |
1082 | phy = phy_create(dev, node, ops); |
1083 | if (!IS_ERR(ptr: phy)) { |
1084 | *ptr = phy; |
1085 | devres_add(dev, res: ptr); |
1086 | } else { |
1087 | devres_free(res: ptr); |
1088 | } |
1089 | |
1090 | return phy; |
1091 | } |
1092 | EXPORT_SYMBOL_GPL(devm_phy_create); |
1093 | |
1094 | /** |
1095 | * phy_destroy() - destroy the phy |
1096 | * @phy: the phy to be destroyed |
1097 | * |
1098 | * Called to destroy the phy. |
1099 | */ |
1100 | void phy_destroy(struct phy *phy) |
1101 | { |
1102 | pm_runtime_disable(dev: &phy->dev); |
1103 | device_unregister(dev: &phy->dev); |
1104 | } |
1105 | EXPORT_SYMBOL_GPL(phy_destroy); |
1106 | |
1107 | /** |
1108 | * devm_phy_destroy() - destroy the PHY |
1109 | * @dev: device that wants to release this phy |
1110 | * @phy: the phy returned by devm_phy_get() |
1111 | * |
1112 | * destroys the devres associated with this phy and invokes phy_destroy |
1113 | * to destroy the phy. |
1114 | */ |
1115 | void devm_phy_destroy(struct device *dev, struct phy *phy) |
1116 | { |
1117 | int r; |
1118 | |
1119 | r = devres_destroy(dev, release: devm_phy_consume, match: devm_phy_match, match_data: phy); |
1120 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n" ); |
1121 | } |
1122 | EXPORT_SYMBOL_GPL(devm_phy_destroy); |
1123 | |
1124 | /** |
1125 | * __of_phy_provider_register() - create/register phy provider with the framework |
1126 | * @dev: struct device of the phy provider |
1127 | * @children: device node containing children (if different from dev->of_node) |
1128 | * @owner: the module owner containing of_xlate |
1129 | * @of_xlate: function pointer to obtain phy instance from phy provider |
1130 | * |
1131 | * Creates struct phy_provider from dev and of_xlate function pointer. |
1132 | * This is used in the case of dt boot for finding the phy instance from |
1133 | * phy provider. |
1134 | * |
1135 | * If the PHY provider doesn't nest children directly but uses a separate |
1136 | * child node to contain the individual children, the @children parameter |
1137 | * can be used to override the default. If NULL, the default (dev->of_node) |
1138 | * will be used. If non-NULL, the device node must be a child (or further |
1139 | * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL |
1140 | * error code is returned. |
1141 | */ |
1142 | struct phy_provider *__of_phy_provider_register(struct device *dev, |
1143 | struct device_node *children, struct module *owner, |
1144 | struct phy * (*of_xlate)(struct device *dev, |
1145 | const struct of_phandle_args *args)) |
1146 | { |
1147 | struct phy_provider *phy_provider; |
1148 | |
1149 | /* |
1150 | * If specified, the device node containing the children must itself |
1151 | * be the provider's device node or a child (or further descendant) |
1152 | * thereof. |
1153 | */ |
1154 | if (children) { |
1155 | struct device_node *parent = of_node_get(node: children), *next; |
1156 | |
1157 | while (parent) { |
1158 | if (parent == dev->of_node) |
1159 | break; |
1160 | |
1161 | next = of_get_parent(node: parent); |
1162 | of_node_put(node: parent); |
1163 | parent = next; |
1164 | } |
1165 | |
1166 | if (!parent) |
1167 | return ERR_PTR(error: -EINVAL); |
1168 | |
1169 | of_node_put(node: parent); |
1170 | } else { |
1171 | children = dev->of_node; |
1172 | } |
1173 | |
1174 | phy_provider = kzalloc(size: sizeof(*phy_provider), GFP_KERNEL); |
1175 | if (!phy_provider) |
1176 | return ERR_PTR(error: -ENOMEM); |
1177 | |
1178 | phy_provider->dev = dev; |
1179 | phy_provider->children = of_node_get(node: children); |
1180 | phy_provider->owner = owner; |
1181 | phy_provider->of_xlate = of_xlate; |
1182 | |
1183 | mutex_lock(&phy_provider_mutex); |
1184 | list_add_tail(new: &phy_provider->list, head: &phy_provider_list); |
1185 | mutex_unlock(lock: &phy_provider_mutex); |
1186 | |
1187 | return phy_provider; |
1188 | } |
1189 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); |
1190 | |
1191 | /** |
1192 | * __devm_of_phy_provider_register() - create/register phy provider with the |
1193 | * framework |
1194 | * @dev: struct device of the phy provider |
1195 | * @children: device node containing children (if different from dev->of_node) |
1196 | * @owner: the module owner containing of_xlate |
1197 | * @of_xlate: function pointer to obtain phy instance from phy provider |
1198 | * |
1199 | * Creates struct phy_provider from dev and of_xlate function pointer. |
1200 | * This is used in the case of dt boot for finding the phy instance from |
1201 | * phy provider. While at that, it also associates the device with the |
1202 | * phy provider using devres. On driver detach, release function is invoked |
1203 | * on the devres data, then, devres data is freed. |
1204 | */ |
1205 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, |
1206 | struct device_node *children, struct module *owner, |
1207 | struct phy * (*of_xlate)(struct device *dev, |
1208 | const struct of_phandle_args *args)) |
1209 | { |
1210 | struct phy_provider **ptr, *phy_provider; |
1211 | |
1212 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); |
1213 | if (!ptr) |
1214 | return ERR_PTR(error: -ENOMEM); |
1215 | |
1216 | phy_provider = __of_phy_provider_register(dev, children, owner, |
1217 | of_xlate); |
1218 | if (!IS_ERR(ptr: phy_provider)) { |
1219 | *ptr = phy_provider; |
1220 | devres_add(dev, res: ptr); |
1221 | } else { |
1222 | devres_free(res: ptr); |
1223 | } |
1224 | |
1225 | return phy_provider; |
1226 | } |
1227 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); |
1228 | |
1229 | /** |
1230 | * of_phy_provider_unregister() - unregister phy provider from the framework |
1231 | * @phy_provider: phy provider returned by of_phy_provider_register() |
1232 | * |
1233 | * Removes the phy_provider created using of_phy_provider_register(). |
1234 | */ |
1235 | void of_phy_provider_unregister(struct phy_provider *phy_provider) |
1236 | { |
1237 | if (IS_ERR(ptr: phy_provider)) |
1238 | return; |
1239 | |
1240 | mutex_lock(&phy_provider_mutex); |
1241 | list_del(entry: &phy_provider->list); |
1242 | of_node_put(node: phy_provider->children); |
1243 | kfree(objp: phy_provider); |
1244 | mutex_unlock(lock: &phy_provider_mutex); |
1245 | } |
1246 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); |
1247 | |
1248 | /** |
1249 | * devm_of_phy_provider_unregister() - remove phy provider from the framework |
1250 | * @dev: struct device of the phy provider |
1251 | * @phy_provider: phy provider returned by of_phy_provider_register() |
1252 | * |
1253 | * destroys the devres associated with this phy provider and invokes |
1254 | * of_phy_provider_unregister to unregister the phy provider. |
1255 | */ |
1256 | void devm_of_phy_provider_unregister(struct device *dev, |
1257 | struct phy_provider *phy_provider) |
1258 | { |
1259 | int r; |
1260 | |
1261 | r = devres_destroy(dev, release: devm_phy_provider_release, match: devm_phy_match, |
1262 | match_data: phy_provider); |
1263 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n" ); |
1264 | } |
1265 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); |
1266 | |
1267 | /** |
1268 | * phy_release() - release the phy |
1269 | * @dev: the dev member within phy |
1270 | * |
1271 | * When the last reference to the device is removed, it is called |
1272 | * from the embedded kobject as release method. |
1273 | */ |
1274 | static void phy_release(struct device *dev) |
1275 | { |
1276 | struct phy *phy; |
1277 | |
1278 | phy = to_phy(dev); |
1279 | dev_vdbg(dev, "releasing '%s'\n" , dev_name(dev)); |
1280 | debugfs_remove_recursive(dentry: phy->debugfs); |
1281 | regulator_put(regulator: phy->pwr); |
1282 | ida_free(&phy_ida, id: phy->id); |
1283 | kfree(objp: phy); |
1284 | } |
1285 | |
1286 | static int __init phy_core_init(void) |
1287 | { |
1288 | phy_class = class_create(name: "phy" ); |
1289 | if (IS_ERR(ptr: phy_class)) { |
1290 | pr_err("failed to create phy class --> %ld\n" , |
1291 | PTR_ERR(phy_class)); |
1292 | return PTR_ERR(ptr: phy_class); |
1293 | } |
1294 | |
1295 | phy_class->dev_release = phy_release; |
1296 | |
1297 | phy_debugfs_root = debugfs_create_dir(name: "phy" , NULL); |
1298 | |
1299 | return 0; |
1300 | } |
1301 | device_initcall(phy_core_init); |
1302 | |
1303 | static void __exit phy_core_exit(void) |
1304 | { |
1305 | debugfs_remove_recursive(dentry: phy_debugfs_root); |
1306 | class_destroy(cls: phy_class); |
1307 | } |
1308 | module_exit(phy_core_exit); |
1309 | |