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_ext(struct phy *phy, enum phy_mode mode, int submode)
367 if (!phy || !phy->ops->set_mode)
370 mutex_lock(&phy->mutex);
371 ret = phy->ops->set_mode(phy, mode, submode);
373 phy->attrs.mode = mode;
374 mutex_unlock(&phy->mutex);
378 EXPORT_SYMBOL_GPL(phy_set_mode_ext);
380 int phy_reset(struct phy *phy)
384 if (!phy || !phy->ops->reset)
387 ret = phy_pm_runtime_get_sync(phy);
388 if (ret < 0 && ret != -ENOTSUPP)
391 mutex_lock(&phy->mutex);
392 ret = phy->ops->reset(phy);
393 mutex_unlock(&phy->mutex);
395 phy_pm_runtime_put(phy);
399 EXPORT_SYMBOL_GPL(phy_reset);
401 int phy_calibrate(struct phy *phy)
405 if (!phy || !phy->ops->calibrate)
408 mutex_lock(&phy->mutex);
409 ret = phy->ops->calibrate(phy);
410 mutex_unlock(&phy->mutex);
414 EXPORT_SYMBOL_GPL(phy_calibrate);
417 * phy_configure() - Changes the phy parameters
418 * @phy: the phy returned by phy_get()
419 * @opts: New configuration to apply
421 * Used to change the PHY parameters. phy_init() must have been called
422 * on the phy. The configuration will be applied on the current phy
423 * mode, that can be changed using phy_set_mode().
425 * Returns: 0 if successful, an negative error code otherwise
427 int phy_configure(struct phy *phy, union phy_configure_opts *opts)
434 if (!phy->ops->configure)
437 mutex_lock(&phy->mutex);
438 ret = phy->ops->configure(phy, opts);
439 mutex_unlock(&phy->mutex);
443 EXPORT_SYMBOL_GPL(phy_configure);
446 * phy_validate() - Checks the phy parameters
447 * @phy: the phy returned by phy_get()
448 * @mode: phy_mode the configuration is applicable to.
449 * @submode: PHY submode the configuration is applicable to.
450 * @opts: Configuration to check
452 * Used to check that the current set of parameters can be handled by
453 * the phy. Implementations are free to tune the parameters passed as
454 * arguments if needed by some implementation detail or
455 * constraints. It will not change any actual configuration of the
456 * PHY, so calling it as many times as deemed fit will have no side
459 * Returns: 0 if successful, an negative error code otherwise
461 int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
462 union phy_configure_opts *opts)
469 if (!phy->ops->validate)
472 mutex_lock(&phy->mutex);
473 ret = phy->ops->validate(phy, mode, submode, opts);
474 mutex_unlock(&phy->mutex);
478 EXPORT_SYMBOL_GPL(phy_validate);
481 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
482 * @np: device_node for which to get the phy
483 * @index: the index of the phy
485 * Returns the phy associated with the given phandle value,
486 * after getting a refcount to it or -ENODEV if there is no such phy or
487 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
488 * not yet loaded. This function uses of_xlate call back function provided
489 * while registering the phy_provider to find the phy instance.
491 static struct phy *_of_phy_get(struct device_node *np, int index)
494 struct phy_provider *phy_provider;
495 struct phy *phy = NULL;
496 struct of_phandle_args args;
498 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
501 return ERR_PTR(-ENODEV);
503 /* This phy type handled by the usb-phy subsystem for now */
504 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
505 return ERR_PTR(-ENODEV);
507 mutex_lock(&phy_provider_mutex);
508 phy_provider = of_phy_provider_lookup(args.np);
509 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
510 phy = ERR_PTR(-EPROBE_DEFER);
514 if (!of_device_is_available(args.np)) {
515 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
516 phy = ERR_PTR(-ENODEV);
520 phy = phy_provider->of_xlate(phy_provider->dev, &args);
523 module_put(phy_provider->owner);
526 mutex_unlock(&phy_provider_mutex);
527 of_node_put(args.np);
533 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
534 * @np: device_node for which to get the phy
535 * @con_id: name of the phy from device's point of view
537 * Returns the phy driver, after getting a refcount to it; or
538 * -ENODEV if there is no such phy. The caller is responsible for
539 * calling phy_put() to release that count.
541 struct phy *of_phy_get(struct device_node *np, const char *con_id)
543 struct phy *phy = NULL;
547 index = of_property_match_string(np, "phy-names", con_id);
549 phy = _of_phy_get(np, index);
553 if (!try_module_get(phy->ops->owner))
554 return ERR_PTR(-EPROBE_DEFER);
556 get_device(&phy->dev);
560 EXPORT_SYMBOL_GPL(of_phy_get);
563 * phy_put() - release the PHY
564 * @phy: the phy returned by phy_get()
566 * Releases a refcount the caller received from phy_get().
568 void phy_put(struct phy *phy)
570 if (!phy || IS_ERR(phy))
573 mutex_lock(&phy->mutex);
574 if (phy->ops->release)
575 phy->ops->release(phy);
576 mutex_unlock(&phy->mutex);
578 module_put(phy->ops->owner);
579 put_device(&phy->dev);
581 EXPORT_SYMBOL_GPL(phy_put);
584 * devm_phy_put() - release the PHY
585 * @dev: device that wants to release this phy
586 * @phy: the phy returned by devm_phy_get()
588 * destroys the devres associated with this phy and invokes phy_put
589 * to release the phy.
591 void devm_phy_put(struct device *dev, struct phy *phy)
598 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
599 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
601 EXPORT_SYMBOL_GPL(devm_phy_put);
604 * of_phy_simple_xlate() - returns the phy instance from phy provider
605 * @dev: the PHY provider device
606 * @args: of_phandle_args (not used here)
608 * Intended to be used by phy provider for the common case where #phy-cells is
609 * 0. For other cases where #phy-cells is greater than '0', the phy provider
610 * should provide a custom of_xlate function that reads the *args* and returns
611 * the appropriate phy.
613 struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
617 struct class_dev_iter iter;
619 class_dev_iter_init(&iter, phy_class, NULL, NULL);
620 while ((dev = class_dev_iter_next(&iter))) {
622 if (args->np != phy->dev.of_node)
625 class_dev_iter_exit(&iter);
629 class_dev_iter_exit(&iter);
630 return ERR_PTR(-ENODEV);
632 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
635 * phy_get() - lookup and obtain a reference to a phy.
636 * @dev: device that requests this phy
637 * @string: the phy name as given in the dt data or the name of the controller
638 * port for non-dt case
640 * Returns the phy driver, after getting a refcount to it; or
641 * -ENODEV if there is no such phy. The caller is responsible for
642 * calling phy_put() to release that count.
644 struct phy *phy_get(struct device *dev, const char *string)
649 if (string == NULL) {
650 dev_WARN(dev, "missing string\n");
651 return ERR_PTR(-EINVAL);
655 index = of_property_match_string(dev->of_node, "phy-names",
657 phy = _of_phy_get(dev->of_node, index);
659 phy = phy_find(dev, string);
664 if (!try_module_get(phy->ops->owner))
665 return ERR_PTR(-EPROBE_DEFER);
667 get_device(&phy->dev);
671 EXPORT_SYMBOL_GPL(phy_get);
674 * phy_optional_get() - lookup and obtain a reference to an optional phy.
675 * @dev: device that requests this phy
676 * @string: the phy name as given in the dt data or the name of the controller
677 * port for non-dt case
679 * Returns the phy driver, after getting a refcount to it; or
680 * NULL if there is no such phy. The caller is responsible for
681 * calling phy_put() to release that count.
683 struct phy *phy_optional_get(struct device *dev, const char *string)
685 struct phy *phy = phy_get(dev, string);
687 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
692 EXPORT_SYMBOL_GPL(phy_optional_get);
695 * devm_phy_get() - lookup and obtain a reference to a phy.
696 * @dev: device that requests this phy
697 * @string: the phy name as given in the dt data or phy device name
700 * Gets the phy using phy_get(), and associates a device with it using
701 * devres. On driver detach, release function is invoked on the devres data,
702 * then, devres data is freed.
704 struct phy *devm_phy_get(struct device *dev, const char *string)
706 struct phy **ptr, *phy;
708 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
710 return ERR_PTR(-ENOMEM);
712 phy = phy_get(dev, string);
715 devres_add(dev, ptr);
722 EXPORT_SYMBOL_GPL(devm_phy_get);
725 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
726 * @dev: device that requests this phy
727 * @string: the phy name as given in the dt data or phy device name
730 * Gets the phy using phy_get(), and associates a device with it using
731 * devres. On driver detach, release function is invoked on the devres
732 * data, then, devres data is freed. This differs to devm_phy_get() in
733 * that if the phy does not exist, it is not considered an error and
734 * -ENODEV will not be returned. Instead the NULL phy is returned,
735 * which can be passed to all other phy consumer calls.
737 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
739 struct phy *phy = devm_phy_get(dev, string);
741 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
746 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
749 * devm_of_phy_get() - lookup and obtain a reference to a phy.
750 * @dev: device that requests this phy
751 * @np: node containing the phy
752 * @con_id: name of the phy from device's point of view
754 * Gets the phy using of_phy_get(), and associates a device with it using
755 * devres. On driver detach, release function is invoked on the devres data,
756 * then, devres data is freed.
758 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
761 struct phy **ptr, *phy;
763 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
765 return ERR_PTR(-ENOMEM);
767 phy = of_phy_get(np, con_id);
770 devres_add(dev, ptr);
777 EXPORT_SYMBOL_GPL(devm_of_phy_get);
780 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
781 * @dev: device that requests this phy
782 * @np: node containing the phy
783 * @index: index of the phy
785 * Gets the phy using _of_phy_get(), then gets a refcount to it,
786 * and associates a device with it using devres. On driver detach,
787 * release function is invoked on the devres data,
788 * then, devres data is freed.
791 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
794 struct phy **ptr, *phy;
796 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
798 return ERR_PTR(-ENOMEM);
800 phy = _of_phy_get(np, index);
806 if (!try_module_get(phy->ops->owner)) {
808 return ERR_PTR(-EPROBE_DEFER);
811 get_device(&phy->dev);
814 devres_add(dev, ptr);
818 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
821 * phy_create() - create a new phy
822 * @dev: device that is creating the new phy
823 * @node: device node of the phy
824 * @ops: function pointers for performing phy operations
826 * Called to create a phy using phy framework.
828 struct phy *phy_create(struct device *dev, struct device_node *node,
829 const struct phy_ops *ops)
836 return ERR_PTR(-EINVAL);
838 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
840 return ERR_PTR(-ENOMEM);
842 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
844 dev_err(dev, "unable to get id\n");
849 device_initialize(&phy->dev);
850 mutex_init(&phy->mutex);
852 phy->dev.class = phy_class;
853 phy->dev.parent = dev;
854 phy->dev.of_node = node ?: dev->of_node;
858 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
863 phy->pwr = regulator_get_optional(&phy->dev, "phy");
864 if (IS_ERR(phy->pwr)) {
865 ret = PTR_ERR(phy->pwr);
866 if (ret == -EPROBE_DEFER)
872 ret = device_add(&phy->dev);
876 if (pm_runtime_enabled(dev)) {
877 pm_runtime_enable(&phy->dev);
878 pm_runtime_no_callbacks(&phy->dev);
884 put_device(&phy->dev); /* calls phy_release() which frees resources */
891 EXPORT_SYMBOL_GPL(phy_create);
894 * devm_phy_create() - create a new phy
895 * @dev: device that is creating the new phy
896 * @node: device node of the phy
897 * @ops: function pointers for performing phy operations
899 * Creates a new PHY device adding it to the PHY class.
900 * While at that, it also associates the device with the phy using devres.
901 * On driver detach, release function is invoked on the devres data,
902 * then, devres data is freed.
904 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
905 const struct phy_ops *ops)
907 struct phy **ptr, *phy;
909 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
911 return ERR_PTR(-ENOMEM);
913 phy = phy_create(dev, node, ops);
916 devres_add(dev, ptr);
923 EXPORT_SYMBOL_GPL(devm_phy_create);
926 * phy_destroy() - destroy the phy
927 * @phy: the phy to be destroyed
929 * Called to destroy the phy.
931 void phy_destroy(struct phy *phy)
933 pm_runtime_disable(&phy->dev);
934 device_unregister(&phy->dev);
936 EXPORT_SYMBOL_GPL(phy_destroy);
939 * devm_phy_destroy() - destroy the PHY
940 * @dev: device that wants to release this phy
941 * @phy: the phy returned by devm_phy_get()
943 * destroys the devres associated with this phy and invokes phy_destroy
944 * to destroy the phy.
946 void devm_phy_destroy(struct device *dev, struct phy *phy)
950 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
951 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
953 EXPORT_SYMBOL_GPL(devm_phy_destroy);
956 * __of_phy_provider_register() - create/register phy provider with the framework
957 * @dev: struct device of the phy provider
958 * @children: device node containing children (if different from dev->of_node)
959 * @owner: the module owner containing of_xlate
960 * @of_xlate: function pointer to obtain phy instance from phy provider
962 * Creates struct phy_provider from dev and of_xlate function pointer.
963 * This is used in the case of dt boot for finding the phy instance from
966 * If the PHY provider doesn't nest children directly but uses a separate
967 * child node to contain the individual children, the @children parameter
968 * can be used to override the default. If NULL, the default (dev->of_node)
969 * will be used. If non-NULL, the device node must be a child (or further
970 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
971 * error code is returned.
973 struct phy_provider *__of_phy_provider_register(struct device *dev,
974 struct device_node *children, struct module *owner,
975 struct phy * (*of_xlate)(struct device *dev,
976 struct of_phandle_args *args))
978 struct phy_provider *phy_provider;
981 * If specified, the device node containing the children must itself
982 * be the provider's device node or a child (or further descendant)
986 struct device_node *parent = of_node_get(children), *next;
989 if (parent == dev->of_node)
992 next = of_get_parent(parent);
998 return ERR_PTR(-EINVAL);
1000 of_node_put(parent);
1002 children = dev->of_node;
1005 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
1007 return ERR_PTR(-ENOMEM);
1009 phy_provider->dev = dev;
1010 phy_provider->children = of_node_get(children);
1011 phy_provider->owner = owner;
1012 phy_provider->of_xlate = of_xlate;
1014 mutex_lock(&phy_provider_mutex);
1015 list_add_tail(&phy_provider->list, &phy_provider_list);
1016 mutex_unlock(&phy_provider_mutex);
1018 return phy_provider;
1020 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
1023 * __devm_of_phy_provider_register() - create/register phy provider with the
1025 * @dev: struct device of the phy provider
1026 * @owner: the module owner containing of_xlate
1027 * @of_xlate: function pointer to obtain phy instance from phy provider
1029 * Creates struct phy_provider from dev and of_xlate function pointer.
1030 * This is used in the case of dt boot for finding the phy instance from
1031 * phy provider. While at that, it also associates the device with the
1032 * phy provider using devres. On driver detach, release function is invoked
1033 * on the devres data, then, devres data is freed.
1035 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
1036 struct device_node *children, struct module *owner,
1037 struct phy * (*of_xlate)(struct device *dev,
1038 struct of_phandle_args *args))
1040 struct phy_provider **ptr, *phy_provider;
1042 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
1044 return ERR_PTR(-ENOMEM);
1046 phy_provider = __of_phy_provider_register(dev, children, owner,
1048 if (!IS_ERR(phy_provider)) {
1049 *ptr = phy_provider;
1050 devres_add(dev, ptr);
1055 return phy_provider;
1057 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
1060 * of_phy_provider_unregister() - unregister phy provider from the framework
1061 * @phy_provider: phy provider returned by of_phy_provider_register()
1063 * Removes the phy_provider created using of_phy_provider_register().
1065 void of_phy_provider_unregister(struct phy_provider *phy_provider)
1067 if (IS_ERR(phy_provider))
1070 mutex_lock(&phy_provider_mutex);
1071 list_del(&phy_provider->list);
1072 of_node_put(phy_provider->children);
1073 kfree(phy_provider);
1074 mutex_unlock(&phy_provider_mutex);
1076 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1079 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1080 * @dev: struct device of the phy provider
1082 * destroys the devres associated with this phy provider and invokes
1083 * of_phy_provider_unregister to unregister the phy provider.
1085 void devm_of_phy_provider_unregister(struct device *dev,
1086 struct phy_provider *phy_provider) {
1089 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
1091 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1093 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1096 * phy_release() - release the phy
1097 * @dev: the dev member within phy
1099 * When the last reference to the device is removed, it is called
1100 * from the embedded kobject as release method.
1102 static void phy_release(struct device *dev)
1107 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
1108 regulator_put(phy->pwr);
1109 ida_simple_remove(&phy_ida, phy->id);
1113 static int __init phy_core_init(void)
1115 phy_class = class_create(THIS_MODULE, "phy");
1116 if (IS_ERR(phy_class)) {
1117 pr_err("failed to create phy class --> %ld\n",
1118 PTR_ERR(phy_class));
1119 return PTR_ERR(phy_class);
1122 phy_class->dev_release = phy_release;
1126 device_initcall(phy_core_init);