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)
159 if (!pm_runtime_enabled(&phy->dev))
162 ret = pm_runtime_get(&phy->dev);
163 if (ret < 0 && ret != -EINPROGRESS)
164 pm_runtime_put_noidle(&phy->dev);
168 EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
170 int phy_pm_runtime_get_sync(struct phy *phy)
177 if (!pm_runtime_enabled(&phy->dev))
180 ret = pm_runtime_get_sync(&phy->dev);
182 pm_runtime_put_sync(&phy->dev);
186 EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
188 int phy_pm_runtime_put(struct phy *phy)
193 if (!pm_runtime_enabled(&phy->dev))
196 return pm_runtime_put(&phy->dev);
198 EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
200 int phy_pm_runtime_put_sync(struct phy *phy)
205 if (!pm_runtime_enabled(&phy->dev))
208 return pm_runtime_put_sync(&phy->dev);
210 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
212 void phy_pm_runtime_allow(struct phy *phy)
217 if (!pm_runtime_enabled(&phy->dev))
220 pm_runtime_allow(&phy->dev);
222 EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
224 void phy_pm_runtime_forbid(struct phy *phy)
229 if (!pm_runtime_enabled(&phy->dev))
232 pm_runtime_forbid(&phy->dev);
234 EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
236 int phy_init(struct phy *phy)
243 ret = phy_pm_runtime_get_sync(phy);
244 if (ret < 0 && ret != -ENOTSUPP)
246 ret = 0; /* Override possible ret == -ENOTSUPP */
248 mutex_lock(&phy->mutex);
249 if (phy->init_count == 0 && phy->ops->init) {
250 ret = phy->ops->init(phy);
252 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
259 mutex_unlock(&phy->mutex);
260 phy_pm_runtime_put(phy);
263 EXPORT_SYMBOL_GPL(phy_init);
265 int phy_exit(struct phy *phy)
272 ret = phy_pm_runtime_get_sync(phy);
273 if (ret < 0 && ret != -ENOTSUPP)
275 ret = 0; /* Override possible ret == -ENOTSUPP */
277 mutex_lock(&phy->mutex);
278 if (phy->init_count == 1 && phy->ops->exit) {
279 ret = phy->ops->exit(phy);
281 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
288 mutex_unlock(&phy->mutex);
289 phy_pm_runtime_put(phy);
292 EXPORT_SYMBOL_GPL(phy_exit);
294 int phy_power_on(struct phy *phy)
302 ret = regulator_enable(phy->pwr);
307 ret = phy_pm_runtime_get_sync(phy);
308 if (ret < 0 && ret != -ENOTSUPP)
311 ret = 0; /* Override possible ret == -ENOTSUPP */
313 mutex_lock(&phy->mutex);
314 if (phy->power_count == 0 && phy->ops->power_on) {
315 ret = phy->ops->power_on(phy);
317 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
322 mutex_unlock(&phy->mutex);
326 mutex_unlock(&phy->mutex);
327 phy_pm_runtime_put_sync(phy);
330 regulator_disable(phy->pwr);
334 EXPORT_SYMBOL_GPL(phy_power_on);
336 int phy_power_off(struct phy *phy)
343 mutex_lock(&phy->mutex);
344 if (phy->power_count == 1 && phy->ops->power_off) {
345 ret = phy->ops->power_off(phy);
347 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
348 mutex_unlock(&phy->mutex);
353 mutex_unlock(&phy->mutex);
354 phy_pm_runtime_put(phy);
357 regulator_disable(phy->pwr);
361 EXPORT_SYMBOL_GPL(phy_power_off);
363 int phy_set_mode(struct phy *phy, enum phy_mode mode)
367 if (!phy || !phy->ops->set_mode)
370 mutex_lock(&phy->mutex);
371 ret = phy->ops->set_mode(phy, mode);
373 phy->attrs.mode = mode;
374 mutex_unlock(&phy->mutex);
378 EXPORT_SYMBOL_GPL(phy_set_mode);
380 int phy_reset(struct phy *phy)
384 if (!phy || !phy->ops->reset)
387 mutex_lock(&phy->mutex);
388 ret = phy->ops->reset(phy);
389 mutex_unlock(&phy->mutex);
393 EXPORT_SYMBOL_GPL(phy_reset);
395 int phy_calibrate(struct phy *phy)
399 if (!phy || !phy->ops->calibrate)
402 mutex_lock(&phy->mutex);
403 ret = phy->ops->calibrate(phy);
404 mutex_unlock(&phy->mutex);
408 EXPORT_SYMBOL_GPL(phy_calibrate);
411 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
412 * @np: device_node for which to get the phy
413 * @index: the index of the phy
415 * Returns the phy associated with the given phandle value,
416 * after getting a refcount to it or -ENODEV if there is no such phy or
417 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
418 * not yet loaded. This function uses of_xlate call back function provided
419 * while registering the phy_provider to find the phy instance.
421 static struct phy *_of_phy_get(struct device_node *np, int index)
424 struct phy_provider *phy_provider;
425 struct phy *phy = NULL;
426 struct of_phandle_args args;
428 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
431 return ERR_PTR(-ENODEV);
433 /* This phy type handled by the usb-phy subsystem for now */
434 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
435 return ERR_PTR(-ENODEV);
437 mutex_lock(&phy_provider_mutex);
438 phy_provider = of_phy_provider_lookup(args.np);
439 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
440 phy = ERR_PTR(-EPROBE_DEFER);
444 if (!of_device_is_available(args.np)) {
445 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
446 phy = ERR_PTR(-ENODEV);
450 phy = phy_provider->of_xlate(phy_provider->dev, &args);
453 module_put(phy_provider->owner);
456 mutex_unlock(&phy_provider_mutex);
457 of_node_put(args.np);
463 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
464 * @np: device_node for which to get the phy
465 * @con_id: name of the phy from device's point of view
467 * Returns the phy driver, after getting a refcount to it; or
468 * -ENODEV if there is no such phy. The caller is responsible for
469 * calling phy_put() to release that count.
471 struct phy *of_phy_get(struct device_node *np, const char *con_id)
473 struct phy *phy = NULL;
477 index = of_property_match_string(np, "phy-names", con_id);
479 phy = _of_phy_get(np, index);
483 if (!try_module_get(phy->ops->owner))
484 return ERR_PTR(-EPROBE_DEFER);
486 get_device(&phy->dev);
490 EXPORT_SYMBOL_GPL(of_phy_get);
493 * phy_put() - release the PHY
494 * @phy: the phy returned by phy_get()
496 * Releases a refcount the caller received from phy_get().
498 void phy_put(struct phy *phy)
500 if (!phy || IS_ERR(phy))
503 module_put(phy->ops->owner);
504 put_device(&phy->dev);
506 EXPORT_SYMBOL_GPL(phy_put);
509 * devm_phy_put() - release the PHY
510 * @dev: device that wants to release this phy
511 * @phy: the phy returned by devm_phy_get()
513 * destroys the devres associated with this phy and invokes phy_put
514 * to release the phy.
516 void devm_phy_put(struct device *dev, struct phy *phy)
523 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
524 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
526 EXPORT_SYMBOL_GPL(devm_phy_put);
529 * of_phy_simple_xlate() - returns the phy instance from phy provider
530 * @dev: the PHY provider device
531 * @args: of_phandle_args (not used here)
533 * Intended to be used by phy provider for the common case where #phy-cells is
534 * 0. For other cases where #phy-cells is greater than '0', the phy provider
535 * should provide a custom of_xlate function that reads the *args* and returns
536 * the appropriate phy.
538 struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
542 struct class_dev_iter iter;
544 class_dev_iter_init(&iter, phy_class, NULL, NULL);
545 while ((dev = class_dev_iter_next(&iter))) {
547 if (args->np != phy->dev.of_node)
550 class_dev_iter_exit(&iter);
554 class_dev_iter_exit(&iter);
555 return ERR_PTR(-ENODEV);
557 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
560 * phy_get() - lookup and obtain a reference to a phy.
561 * @dev: device that requests this phy
562 * @string: the phy name as given in the dt data or the name of the controller
563 * port for non-dt case
565 * Returns the phy driver, after getting a refcount to it; or
566 * -ENODEV if there is no such phy. The caller is responsible for
567 * calling phy_put() to release that count.
569 struct phy *phy_get(struct device *dev, const char *string)
574 if (string == NULL) {
575 dev_WARN(dev, "missing string\n");
576 return ERR_PTR(-EINVAL);
580 index = of_property_match_string(dev->of_node, "phy-names",
582 phy = _of_phy_get(dev->of_node, index);
584 phy = phy_find(dev, string);
589 if (!try_module_get(phy->ops->owner))
590 return ERR_PTR(-EPROBE_DEFER);
592 get_device(&phy->dev);
596 EXPORT_SYMBOL_GPL(phy_get);
599 * phy_optional_get() - lookup and obtain a reference to an optional phy.
600 * @dev: device that requests this phy
601 * @string: the phy name as given in the dt data or the name of the controller
602 * port for non-dt case
604 * Returns the phy driver, after getting a refcount to it; or
605 * NULL if there is no such phy. The caller is responsible for
606 * calling phy_put() to release that count.
608 struct phy *phy_optional_get(struct device *dev, const char *string)
610 struct phy *phy = phy_get(dev, string);
612 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
617 EXPORT_SYMBOL_GPL(phy_optional_get);
620 * devm_phy_get() - lookup and obtain a reference to a phy.
621 * @dev: device that requests this phy
622 * @string: the phy name as given in the dt data or phy device name
625 * Gets the phy using phy_get(), and associates a device with it using
626 * devres. On driver detach, release function is invoked on the devres data,
627 * then, devres data is freed.
629 struct phy *devm_phy_get(struct device *dev, const char *string)
631 struct phy **ptr, *phy;
633 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
635 return ERR_PTR(-ENOMEM);
637 phy = phy_get(dev, string);
640 devres_add(dev, ptr);
647 EXPORT_SYMBOL_GPL(devm_phy_get);
650 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
651 * @dev: device that requests this phy
652 * @string: the phy name as given in the dt data or phy device name
655 * Gets the phy using phy_get(), and associates a device with it using
656 * devres. On driver detach, release function is invoked on the devres
657 * data, then, devres data is freed. This differs to devm_phy_get() in
658 * that if the phy does not exist, it is not considered an error and
659 * -ENODEV will not be returned. Instead the NULL phy is returned,
660 * which can be passed to all other phy consumer calls.
662 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
664 struct phy *phy = devm_phy_get(dev, string);
666 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
671 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
674 * devm_of_phy_get() - lookup and obtain a reference to a phy.
675 * @dev: device that requests this phy
676 * @np: node containing the phy
677 * @con_id: name of the phy from device's point of view
679 * Gets the phy using of_phy_get(), and associates a device with it using
680 * devres. On driver detach, release function is invoked on the devres data,
681 * then, devres data is freed.
683 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
686 struct phy **ptr, *phy;
688 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
690 return ERR_PTR(-ENOMEM);
692 phy = of_phy_get(np, con_id);
695 devres_add(dev, ptr);
702 EXPORT_SYMBOL_GPL(devm_of_phy_get);
705 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
706 * @dev: device that requests this phy
707 * @np: node containing the phy
708 * @index: index of the phy
710 * Gets the phy using _of_phy_get(), then gets a refcount to it,
711 * and associates a device with it using devres. On driver detach,
712 * release function is invoked on the devres data,
713 * then, devres data is freed.
716 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
719 struct phy **ptr, *phy;
721 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
723 return ERR_PTR(-ENOMEM);
725 phy = _of_phy_get(np, index);
731 if (!try_module_get(phy->ops->owner)) {
733 return ERR_PTR(-EPROBE_DEFER);
736 get_device(&phy->dev);
739 devres_add(dev, ptr);
743 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
746 * phy_create() - create a new phy
747 * @dev: device that is creating the new phy
748 * @node: device node of the phy
749 * @ops: function pointers for performing phy operations
751 * Called to create a phy using phy framework.
753 struct phy *phy_create(struct device *dev, struct device_node *node,
754 const struct phy_ops *ops)
761 return ERR_PTR(-EINVAL);
763 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
765 return ERR_PTR(-ENOMEM);
767 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
769 dev_err(dev, "unable to get id\n");
774 device_initialize(&phy->dev);
775 mutex_init(&phy->mutex);
777 phy->dev.class = phy_class;
778 phy->dev.parent = dev;
779 phy->dev.of_node = node ?: dev->of_node;
783 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
788 phy->pwr = regulator_get_optional(&phy->dev, "phy");
789 if (IS_ERR(phy->pwr)) {
790 ret = PTR_ERR(phy->pwr);
791 if (ret == -EPROBE_DEFER)
797 ret = device_add(&phy->dev);
801 if (pm_runtime_enabled(dev)) {
802 pm_runtime_enable(&phy->dev);
803 pm_runtime_no_callbacks(&phy->dev);
809 put_device(&phy->dev); /* calls phy_release() which frees resources */
816 EXPORT_SYMBOL_GPL(phy_create);
819 * devm_phy_create() - create a new phy
820 * @dev: device that is creating the new phy
821 * @node: device node of the phy
822 * @ops: function pointers for performing phy operations
824 * Creates a new PHY device adding it to the PHY class.
825 * While at that, it also associates the device with the phy using devres.
826 * On driver detach, release function is invoked on the devres data,
827 * then, devres data is freed.
829 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
830 const struct phy_ops *ops)
832 struct phy **ptr, *phy;
834 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
836 return ERR_PTR(-ENOMEM);
838 phy = phy_create(dev, node, ops);
841 devres_add(dev, ptr);
848 EXPORT_SYMBOL_GPL(devm_phy_create);
851 * phy_destroy() - destroy the phy
852 * @phy: the phy to be destroyed
854 * Called to destroy the phy.
856 void phy_destroy(struct phy *phy)
858 pm_runtime_disable(&phy->dev);
859 device_unregister(&phy->dev);
861 EXPORT_SYMBOL_GPL(phy_destroy);
864 * devm_phy_destroy() - destroy the PHY
865 * @dev: device that wants to release this phy
866 * @phy: the phy returned by devm_phy_get()
868 * destroys the devres associated with this phy and invokes phy_destroy
869 * to destroy the phy.
871 void devm_phy_destroy(struct device *dev, struct phy *phy)
875 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
876 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
878 EXPORT_SYMBOL_GPL(devm_phy_destroy);
881 * __of_phy_provider_register() - create/register phy provider with the framework
882 * @dev: struct device of the phy provider
883 * @children: device node containing children (if different from dev->of_node)
884 * @owner: the module owner containing of_xlate
885 * @of_xlate: function pointer to obtain phy instance from phy provider
887 * Creates struct phy_provider from dev and of_xlate function pointer.
888 * This is used in the case of dt boot for finding the phy instance from
891 * If the PHY provider doesn't nest children directly but uses a separate
892 * child node to contain the individual children, the @children parameter
893 * can be used to override the default. If NULL, the default (dev->of_node)
894 * will be used. If non-NULL, the device node must be a child (or further
895 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
896 * error code is returned.
898 struct phy_provider *__of_phy_provider_register(struct device *dev,
899 struct device_node *children, struct module *owner,
900 struct phy * (*of_xlate)(struct device *dev,
901 struct of_phandle_args *args))
903 struct phy_provider *phy_provider;
906 * If specified, the device node containing the children must itself
907 * be the provider's device node or a child (or further descendant)
911 struct device_node *parent = of_node_get(children), *next;
914 if (parent == dev->of_node)
917 next = of_get_parent(parent);
923 return ERR_PTR(-EINVAL);
927 children = dev->of_node;
930 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
932 return ERR_PTR(-ENOMEM);
934 phy_provider->dev = dev;
935 phy_provider->children = of_node_get(children);
936 phy_provider->owner = owner;
937 phy_provider->of_xlate = of_xlate;
939 mutex_lock(&phy_provider_mutex);
940 list_add_tail(&phy_provider->list, &phy_provider_list);
941 mutex_unlock(&phy_provider_mutex);
945 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
948 * __devm_of_phy_provider_register() - create/register phy provider with the
950 * @dev: struct device of the phy provider
951 * @owner: the module owner containing of_xlate
952 * @of_xlate: function pointer to obtain phy instance from phy provider
954 * Creates struct phy_provider from dev and of_xlate function pointer.
955 * This is used in the case of dt boot for finding the phy instance from
956 * phy provider. While at that, it also associates the device with the
957 * phy provider using devres. On driver detach, release function is invoked
958 * on the devres data, then, devres data is freed.
960 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
961 struct device_node *children, struct module *owner,
962 struct phy * (*of_xlate)(struct device *dev,
963 struct of_phandle_args *args))
965 struct phy_provider **ptr, *phy_provider;
967 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
969 return ERR_PTR(-ENOMEM);
971 phy_provider = __of_phy_provider_register(dev, children, owner,
973 if (!IS_ERR(phy_provider)) {
975 devres_add(dev, ptr);
982 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
985 * of_phy_provider_unregister() - unregister phy provider from the framework
986 * @phy_provider: phy provider returned by of_phy_provider_register()
988 * Removes the phy_provider created using of_phy_provider_register().
990 void of_phy_provider_unregister(struct phy_provider *phy_provider)
992 if (IS_ERR(phy_provider))
995 mutex_lock(&phy_provider_mutex);
996 list_del(&phy_provider->list);
997 of_node_put(phy_provider->children);
999 mutex_unlock(&phy_provider_mutex);
1001 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1004 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1005 * @dev: struct device of the phy provider
1007 * destroys the devres associated with this phy provider and invokes
1008 * of_phy_provider_unregister to unregister the phy provider.
1010 void devm_of_phy_provider_unregister(struct device *dev,
1011 struct phy_provider *phy_provider) {
1014 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
1016 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1018 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1021 * phy_release() - release the phy
1022 * @dev: the dev member within phy
1024 * When the last reference to the device is removed, it is called
1025 * from the embedded kobject as release method.
1027 static void phy_release(struct device *dev)
1032 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
1033 regulator_put(phy->pwr);
1034 ida_simple_remove(&phy_ida, phy->id);
1038 static int __init phy_core_init(void)
1040 phy_class = class_create(THIS_MODULE, "phy");
1041 if (IS_ERR(phy_class)) {
1042 pr_err("failed to create phy class --> %ld\n",
1043 PTR_ERR(phy_class));
1044 return PTR_ERR(phy_class);
1047 phy_class->dev_release = phy_release;
1051 module_init(phy_core_init);
1053 static void __exit phy_core_exit(void)
1055 class_destroy(phy_class);
1057 module_exit(phy_core_exit);
1059 MODULE_DESCRIPTION("Generic PHY Framework");
1060 MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
1061 MODULE_LICENSE("GPL v2");