2 * phy-core.c -- Generic Phy framework.
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
6 * Author: Kishon Vijay Abraham I <kishon@ti.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/export.h>
16 #include <linux/module.h>
17 #include <linux/err.h>
18 #include <linux/device.h>
19 #include <linux/slab.h>
21 #include <linux/phy/phy.h>
22 #include <linux/idr.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/regulator/consumer.h>
26 static struct class *phy_class;
27 static DEFINE_MUTEX(phy_provider_mutex);
28 static LIST_HEAD(phy_provider_list);
29 static LIST_HEAD(phys);
30 static DEFINE_IDA(phy_ida);
32 static void devm_phy_release(struct device *dev, void *res)
34 struct phy *phy = *(struct phy **)res;
39 static void devm_phy_provider_release(struct device *dev, void *res)
41 struct phy_provider *phy_provider = *(struct phy_provider **)res;
43 of_phy_provider_unregister(phy_provider);
46 static void devm_phy_consume(struct device *dev, void *res)
48 struct phy *phy = *(struct phy **)res;
53 static int devm_phy_match(struct device *dev, void *res, void *match_data)
55 struct phy **phy = res;
57 return *phy == match_data;
61 * phy_create_lookup() - allocate and register PHY/device association
62 * @phy: the phy of the association
63 * @con_id: connection ID string on device
64 * @dev_id: the device of the association
66 * Creates and registers phy_lookup entry.
68 int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id)
70 struct phy_lookup *pl;
72 if (!phy || !dev_id || !con_id)
75 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
83 mutex_lock(&phy_provider_mutex);
84 list_add_tail(&pl->node, &phys);
85 mutex_unlock(&phy_provider_mutex);
89 EXPORT_SYMBOL_GPL(phy_create_lookup);
92 * phy_remove_lookup() - find and remove PHY/device association
93 * @phy: the phy of the association
94 * @con_id: connection ID string on device
95 * @dev_id: the device of the association
97 * Finds and unregisters phy_lookup entry that was created with
98 * phy_create_lookup().
100 void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id)
102 struct phy_lookup *pl;
104 if (!phy || !dev_id || !con_id)
107 mutex_lock(&phy_provider_mutex);
108 list_for_each_entry(pl, &phys, node)
109 if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) &&
110 !strcmp(pl->con_id, con_id)) {
115 mutex_unlock(&phy_provider_mutex);
117 EXPORT_SYMBOL_GPL(phy_remove_lookup);
119 static struct phy *phy_find(struct device *dev, const char *con_id)
121 const char *dev_id = dev_name(dev);
122 struct phy_lookup *p, *pl = NULL;
124 mutex_lock(&phy_provider_mutex);
125 list_for_each_entry(p, &phys, node)
126 if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) {
130 mutex_unlock(&phy_provider_mutex);
132 return pl ? pl->phy : ERR_PTR(-ENODEV);
135 static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
137 struct phy_provider *phy_provider;
138 struct device_node *child;
140 list_for_each_entry(phy_provider, &phy_provider_list, list) {
141 if (phy_provider->dev->of_node == node)
144 for_each_child_of_node(phy_provider->children, child)
149 return ERR_PTR(-EPROBE_DEFER);
152 int phy_pm_runtime_get(struct phy *phy)
156 if (!pm_runtime_enabled(&phy->dev))
159 ret = pm_runtime_get(&phy->dev);
160 if (ret < 0 && ret != -EINPROGRESS)
161 pm_runtime_put_noidle(&phy->dev);
165 EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
167 int phy_pm_runtime_get_sync(struct phy *phy)
171 if (!pm_runtime_enabled(&phy->dev))
174 ret = pm_runtime_get_sync(&phy->dev);
176 pm_runtime_put_sync(&phy->dev);
180 EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
182 int phy_pm_runtime_put(struct phy *phy)
184 if (!pm_runtime_enabled(&phy->dev))
187 return pm_runtime_put(&phy->dev);
189 EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
191 int phy_pm_runtime_put_sync(struct phy *phy)
193 if (!pm_runtime_enabled(&phy->dev))
196 return pm_runtime_put_sync(&phy->dev);
198 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
200 void phy_pm_runtime_allow(struct phy *phy)
202 if (!pm_runtime_enabled(&phy->dev))
205 pm_runtime_allow(&phy->dev);
207 EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
209 void phy_pm_runtime_forbid(struct phy *phy)
211 if (!pm_runtime_enabled(&phy->dev))
214 pm_runtime_forbid(&phy->dev);
216 EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
218 int phy_init(struct phy *phy)
225 ret = phy_pm_runtime_get_sync(phy);
226 if (ret < 0 && ret != -ENOTSUPP)
228 ret = 0; /* Override possible ret == -ENOTSUPP */
230 mutex_lock(&phy->mutex);
231 if (phy->init_count == 0 && phy->ops->init) {
232 ret = phy->ops->init(phy);
234 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
241 mutex_unlock(&phy->mutex);
242 phy_pm_runtime_put(phy);
245 EXPORT_SYMBOL_GPL(phy_init);
247 int phy_exit(struct phy *phy)
254 ret = phy_pm_runtime_get_sync(phy);
255 if (ret < 0 && ret != -ENOTSUPP)
257 ret = 0; /* Override possible ret == -ENOTSUPP */
259 mutex_lock(&phy->mutex);
260 if (phy->init_count == 1 && phy->ops->exit) {
261 ret = phy->ops->exit(phy);
263 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
270 mutex_unlock(&phy->mutex);
271 phy_pm_runtime_put(phy);
274 EXPORT_SYMBOL_GPL(phy_exit);
276 int phy_power_on(struct phy *phy)
284 ret = regulator_enable(phy->pwr);
289 ret = phy_pm_runtime_get_sync(phy);
290 if (ret < 0 && ret != -ENOTSUPP)
293 ret = 0; /* Override possible ret == -ENOTSUPP */
295 mutex_lock(&phy->mutex);
296 if (phy->power_count == 0 && phy->ops->power_on) {
297 ret = phy->ops->power_on(phy);
299 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
304 mutex_unlock(&phy->mutex);
308 mutex_unlock(&phy->mutex);
309 phy_pm_runtime_put_sync(phy);
312 regulator_disable(phy->pwr);
316 EXPORT_SYMBOL_GPL(phy_power_on);
318 int phy_power_off(struct phy *phy)
325 mutex_lock(&phy->mutex);
326 if (phy->power_count == 1 && phy->ops->power_off) {
327 ret = phy->ops->power_off(phy);
329 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
330 mutex_unlock(&phy->mutex);
335 mutex_unlock(&phy->mutex);
336 phy_pm_runtime_put(phy);
339 regulator_disable(phy->pwr);
343 EXPORT_SYMBOL_GPL(phy_power_off);
345 int phy_set_mode(struct phy *phy, enum phy_mode mode)
349 if (!phy || !phy->ops->set_mode)
352 mutex_lock(&phy->mutex);
353 ret = phy->ops->set_mode(phy, mode);
354 mutex_unlock(&phy->mutex);
358 EXPORT_SYMBOL_GPL(phy_set_mode);
360 int phy_reset(struct phy *phy)
364 if (!phy || !phy->ops->reset)
367 mutex_lock(&phy->mutex);
368 ret = phy->ops->reset(phy);
369 mutex_unlock(&phy->mutex);
373 EXPORT_SYMBOL_GPL(phy_reset);
376 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
377 * @np: device_node for which to get the phy
378 * @index: the index of the phy
380 * Returns the phy associated with the given phandle value,
381 * after getting a refcount to it or -ENODEV if there is no such phy or
382 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
383 * not yet loaded. This function uses of_xlate call back function provided
384 * while registering the phy_provider to find the phy instance.
386 static struct phy *_of_phy_get(struct device_node *np, int index)
389 struct phy_provider *phy_provider;
390 struct phy *phy = NULL;
391 struct of_phandle_args args;
393 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
396 return ERR_PTR(-ENODEV);
398 /* This phy type handled by the usb-phy subsystem for now */
399 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
400 return ERR_PTR(-ENODEV);
402 mutex_lock(&phy_provider_mutex);
403 phy_provider = of_phy_provider_lookup(args.np);
404 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
405 phy = ERR_PTR(-EPROBE_DEFER);
409 if (!of_device_is_available(args.np)) {
410 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
411 phy = ERR_PTR(-ENODEV);
415 phy = phy_provider->of_xlate(phy_provider->dev, &args);
418 module_put(phy_provider->owner);
421 mutex_unlock(&phy_provider_mutex);
422 of_node_put(args.np);
428 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
429 * @np: device_node for which to get the phy
430 * @con_id: name of the phy from device's point of view
432 * Returns the phy driver, after getting a refcount to it; or
433 * -ENODEV if there is no such phy. The caller is responsible for
434 * calling phy_put() to release that count.
436 struct phy *of_phy_get(struct device_node *np, const char *con_id)
438 struct phy *phy = NULL;
442 index = of_property_match_string(np, "phy-names", con_id);
444 phy = _of_phy_get(np, index);
448 if (!try_module_get(phy->ops->owner))
449 return ERR_PTR(-EPROBE_DEFER);
451 get_device(&phy->dev);
455 EXPORT_SYMBOL_GPL(of_phy_get);
458 * phy_put() - release the PHY
459 * @phy: the phy returned by phy_get()
461 * Releases a refcount the caller received from phy_get().
463 void phy_put(struct phy *phy)
465 if (!phy || IS_ERR(phy))
468 module_put(phy->ops->owner);
469 put_device(&phy->dev);
471 EXPORT_SYMBOL_GPL(phy_put);
474 * devm_phy_put() - release the PHY
475 * @dev: device that wants to release this phy
476 * @phy: the phy returned by devm_phy_get()
478 * destroys the devres associated with this phy and invokes phy_put
479 * to release the phy.
481 void devm_phy_put(struct device *dev, struct phy *phy)
488 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
489 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
491 EXPORT_SYMBOL_GPL(devm_phy_put);
494 * of_phy_simple_xlate() - returns the phy instance from phy provider
495 * @dev: the PHY provider device
496 * @args: of_phandle_args (not used here)
498 * Intended to be used by phy provider for the common case where #phy-cells is
499 * 0. For other cases where #phy-cells is greater than '0', the phy provider
500 * should provide a custom of_xlate function that reads the *args* and returns
501 * the appropriate phy.
503 struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
507 struct class_dev_iter iter;
509 class_dev_iter_init(&iter, phy_class, NULL, NULL);
510 while ((dev = class_dev_iter_next(&iter))) {
512 if (args->np != phy->dev.of_node)
515 class_dev_iter_exit(&iter);
519 class_dev_iter_exit(&iter);
520 return ERR_PTR(-ENODEV);
522 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
525 * phy_get() - lookup and obtain a reference to a phy.
526 * @dev: device that requests this phy
527 * @string: the phy name as given in the dt data or the name of the controller
528 * port for non-dt case
530 * Returns the phy driver, after getting a refcount to it; or
531 * -ENODEV if there is no such phy. The caller is responsible for
532 * calling phy_put() to release that count.
534 struct phy *phy_get(struct device *dev, const char *string)
539 if (string == NULL) {
540 dev_WARN(dev, "missing string\n");
541 return ERR_PTR(-EINVAL);
545 index = of_property_match_string(dev->of_node, "phy-names",
547 phy = _of_phy_get(dev->of_node, index);
549 phy = phy_find(dev, string);
554 if (!try_module_get(phy->ops->owner))
555 return ERR_PTR(-EPROBE_DEFER);
557 get_device(&phy->dev);
561 EXPORT_SYMBOL_GPL(phy_get);
564 * phy_optional_get() - lookup and obtain a reference to an optional phy.
565 * @dev: device that requests this phy
566 * @string: the phy name as given in the dt data or the name of the controller
567 * port for non-dt case
569 * Returns the phy driver, after getting a refcount to it; or
570 * NULL if there is no such phy. The caller is responsible for
571 * calling phy_put() to release that count.
573 struct phy *phy_optional_get(struct device *dev, const char *string)
575 struct phy *phy = phy_get(dev, string);
577 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
582 EXPORT_SYMBOL_GPL(phy_optional_get);
585 * devm_phy_get() - lookup and obtain a reference to a phy.
586 * @dev: device that requests this phy
587 * @string: the phy name as given in the dt data or phy device name
590 * Gets the phy using phy_get(), and associates a device with it using
591 * devres. On driver detach, release function is invoked on the devres data,
592 * then, devres data is freed.
594 struct phy *devm_phy_get(struct device *dev, const char *string)
596 struct phy **ptr, *phy;
598 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
600 return ERR_PTR(-ENOMEM);
602 phy = phy_get(dev, string);
605 devres_add(dev, ptr);
612 EXPORT_SYMBOL_GPL(devm_phy_get);
615 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
616 * @dev: device that requests this phy
617 * @string: the phy name as given in the dt data or phy device name
620 * Gets the phy using phy_get(), and associates a device with it using
621 * devres. On driver detach, release function is invoked on the devres
622 * data, then, devres data is freed. This differs to devm_phy_get() in
623 * that if the phy does not exist, it is not considered an error and
624 * -ENODEV will not be returned. Instead the NULL phy is returned,
625 * which can be passed to all other phy consumer calls.
627 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
629 struct phy *phy = devm_phy_get(dev, string);
631 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
636 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
639 * devm_of_phy_get() - lookup and obtain a reference to a phy.
640 * @dev: device that requests this phy
641 * @np: node containing the phy
642 * @con_id: name of the phy from device's point of view
644 * Gets the phy using of_phy_get(), and associates a device with it using
645 * devres. On driver detach, release function is invoked on the devres data,
646 * then, devres data is freed.
648 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
651 struct phy **ptr, *phy;
653 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
655 return ERR_PTR(-ENOMEM);
657 phy = of_phy_get(np, con_id);
660 devres_add(dev, ptr);
667 EXPORT_SYMBOL_GPL(devm_of_phy_get);
670 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
671 * @dev: device that requests this phy
672 * @np: node containing the phy
673 * @index: index of the phy
675 * Gets the phy using _of_phy_get(), then gets a refcount to it,
676 * and associates a device with it using devres. On driver detach,
677 * release function is invoked on the devres data,
678 * then, devres data is freed.
681 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
684 struct phy **ptr, *phy;
686 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
688 return ERR_PTR(-ENOMEM);
690 phy = _of_phy_get(np, index);
696 if (!try_module_get(phy->ops->owner)) {
698 return ERR_PTR(-EPROBE_DEFER);
701 get_device(&phy->dev);
704 devres_add(dev, ptr);
708 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
711 * phy_create() - create a new phy
712 * @dev: device that is creating the new phy
713 * @node: device node of the phy
714 * @ops: function pointers for performing phy operations
716 * Called to create a phy using phy framework.
718 struct phy *phy_create(struct device *dev, struct device_node *node,
719 const struct phy_ops *ops)
726 return ERR_PTR(-EINVAL);
728 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
730 return ERR_PTR(-ENOMEM);
732 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
734 dev_err(dev, "unable to get id\n");
739 device_initialize(&phy->dev);
740 mutex_init(&phy->mutex);
742 phy->dev.class = phy_class;
743 phy->dev.parent = dev;
744 phy->dev.of_node = node ?: dev->of_node;
748 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
753 phy->pwr = regulator_get_optional(&phy->dev, "phy");
754 if (IS_ERR(phy->pwr)) {
755 ret = PTR_ERR(phy->pwr);
756 if (ret == -EPROBE_DEFER)
762 ret = device_add(&phy->dev);
766 if (pm_runtime_enabled(dev)) {
767 pm_runtime_enable(&phy->dev);
768 pm_runtime_no_callbacks(&phy->dev);
774 put_device(&phy->dev); /* calls phy_release() which frees resources */
781 EXPORT_SYMBOL_GPL(phy_create);
784 * devm_phy_create() - create a new phy
785 * @dev: device that is creating the new phy
786 * @node: device node of the phy
787 * @ops: function pointers for performing phy operations
789 * Creates a new PHY device adding it to the PHY class.
790 * While at that, it also associates the device with the phy using devres.
791 * On driver detach, release function is invoked on the devres data,
792 * then, devres data is freed.
794 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
795 const struct phy_ops *ops)
797 struct phy **ptr, *phy;
799 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
801 return ERR_PTR(-ENOMEM);
803 phy = phy_create(dev, node, ops);
806 devres_add(dev, ptr);
813 EXPORT_SYMBOL_GPL(devm_phy_create);
816 * phy_destroy() - destroy the phy
817 * @phy: the phy to be destroyed
819 * Called to destroy the phy.
821 void phy_destroy(struct phy *phy)
823 pm_runtime_disable(&phy->dev);
824 device_unregister(&phy->dev);
826 EXPORT_SYMBOL_GPL(phy_destroy);
829 * devm_phy_destroy() - destroy the PHY
830 * @dev: device that wants to release this phy
831 * @phy: the phy returned by devm_phy_get()
833 * destroys the devres associated with this phy and invokes phy_destroy
834 * to destroy the phy.
836 void devm_phy_destroy(struct device *dev, struct phy *phy)
840 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
841 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
843 EXPORT_SYMBOL_GPL(devm_phy_destroy);
846 * __of_phy_provider_register() - create/register phy provider with the framework
847 * @dev: struct device of the phy provider
848 * @children: device node containing children (if different from dev->of_node)
849 * @owner: the module owner containing of_xlate
850 * @of_xlate: function pointer to obtain phy instance from phy provider
852 * Creates struct phy_provider from dev and of_xlate function pointer.
853 * This is used in the case of dt boot for finding the phy instance from
856 * If the PHY provider doesn't nest children directly but uses a separate
857 * child node to contain the individual children, the @children parameter
858 * can be used to override the default. If NULL, the default (dev->of_node)
859 * will be used. If non-NULL, the device node must be a child (or further
860 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
861 * error code is returned.
863 struct phy_provider *__of_phy_provider_register(struct device *dev,
864 struct device_node *children, struct module *owner,
865 struct phy * (*of_xlate)(struct device *dev,
866 struct of_phandle_args *args))
868 struct phy_provider *phy_provider;
871 * If specified, the device node containing the children must itself
872 * be the provider's device node or a child (or further descendant)
876 struct device_node *parent = of_node_get(children), *next;
879 if (parent == dev->of_node)
882 next = of_get_parent(parent);
888 return ERR_PTR(-EINVAL);
892 children = dev->of_node;
895 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
897 return ERR_PTR(-ENOMEM);
899 phy_provider->dev = dev;
900 phy_provider->children = of_node_get(children);
901 phy_provider->owner = owner;
902 phy_provider->of_xlate = of_xlate;
904 mutex_lock(&phy_provider_mutex);
905 list_add_tail(&phy_provider->list, &phy_provider_list);
906 mutex_unlock(&phy_provider_mutex);
910 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
913 * __devm_of_phy_provider_register() - create/register phy provider with the
915 * @dev: struct device of the phy provider
916 * @owner: the module owner containing of_xlate
917 * @of_xlate: function pointer to obtain phy instance from phy provider
919 * Creates struct phy_provider from dev and of_xlate function pointer.
920 * This is used in the case of dt boot for finding the phy instance from
921 * phy provider. While at that, it also associates the device with the
922 * phy provider using devres. On driver detach, release function is invoked
923 * on the devres data, then, devres data is freed.
925 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
926 struct device_node *children, struct module *owner,
927 struct phy * (*of_xlate)(struct device *dev,
928 struct of_phandle_args *args))
930 struct phy_provider **ptr, *phy_provider;
932 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
934 return ERR_PTR(-ENOMEM);
936 phy_provider = __of_phy_provider_register(dev, children, owner,
938 if (!IS_ERR(phy_provider)) {
940 devres_add(dev, ptr);
947 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
950 * of_phy_provider_unregister() - unregister phy provider from the framework
951 * @phy_provider: phy provider returned by of_phy_provider_register()
953 * Removes the phy_provider created using of_phy_provider_register().
955 void of_phy_provider_unregister(struct phy_provider *phy_provider)
957 if (IS_ERR(phy_provider))
960 mutex_lock(&phy_provider_mutex);
961 list_del(&phy_provider->list);
962 of_node_put(phy_provider->children);
964 mutex_unlock(&phy_provider_mutex);
966 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
969 * devm_of_phy_provider_unregister() - remove phy provider from the framework
970 * @dev: struct device of the phy provider
972 * destroys the devres associated with this phy provider and invokes
973 * of_phy_provider_unregister to unregister the phy provider.
975 void devm_of_phy_provider_unregister(struct device *dev,
976 struct phy_provider *phy_provider) {
979 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
981 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
983 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
986 * phy_release() - release the phy
987 * @dev: the dev member within phy
989 * When the last reference to the device is removed, it is called
990 * from the embedded kobject as release method.
992 static void phy_release(struct device *dev)
997 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
998 regulator_put(phy->pwr);
999 ida_simple_remove(&phy_ida, phy->id);
1003 static int __init phy_core_init(void)
1005 phy_class = class_create(THIS_MODULE, "phy");
1006 if (IS_ERR(phy_class)) {
1007 pr_err("failed to create phy class --> %ld\n",
1008 PTR_ERR(phy_class));
1009 return PTR_ERR(phy_class);
1012 phy_class->dev_release = phy_release;
1016 module_init(phy_core_init);
1018 static void __exit phy_core_exit(void)
1020 class_destroy(phy_class);
1022 module_exit(phy_core_exit);
1024 MODULE_DESCRIPTION("Generic PHY Framework");
1025 MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
1026 MODULE_LICENSE("GPL v2");