1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * phy-core.c -- Generic Phy framework.
5 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
10 #include <linux/kernel.h>
11 #include <linux/export.h>
12 #include <linux/module.h>
13 #include <linux/err.h>
14 #include <linux/device.h>
15 #include <linux/slab.h>
17 #include <linux/phy/phy.h>
18 #include <linux/idr.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/regulator/consumer.h>
22 static struct class *phy_class;
23 static DEFINE_MUTEX(phy_provider_mutex);
24 static LIST_HEAD(phy_provider_list);
25 static LIST_HEAD(phys);
26 static DEFINE_IDA(phy_ida);
28 static void devm_phy_release(struct device *dev, void *res)
30 struct phy *phy = *(struct phy **)res;
35 static void devm_phy_provider_release(struct device *dev, void *res)
37 struct phy_provider *phy_provider = *(struct phy_provider **)res;
39 of_phy_provider_unregister(phy_provider);
42 static void devm_phy_consume(struct device *dev, void *res)
44 struct phy *phy = *(struct phy **)res;
49 static int devm_phy_match(struct device *dev, void *res, void *match_data)
51 struct phy **phy = res;
53 return *phy == match_data;
57 * phy_create_lookup() - allocate and register PHY/device association
58 * @phy: the phy of the association
59 * @con_id: connection ID string on device
60 * @dev_id: the device of the association
62 * Creates and registers phy_lookup entry.
64 int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id)
66 struct phy_lookup *pl;
68 if (!phy || !dev_id || !con_id)
71 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
79 mutex_lock(&phy_provider_mutex);
80 list_add_tail(&pl->node, &phys);
81 mutex_unlock(&phy_provider_mutex);
85 EXPORT_SYMBOL_GPL(phy_create_lookup);
88 * phy_remove_lookup() - find and remove PHY/device association
89 * @phy: the phy of the association
90 * @con_id: connection ID string on device
91 * @dev_id: the device of the association
93 * Finds and unregisters phy_lookup entry that was created with
94 * phy_create_lookup().
96 void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id)
98 struct phy_lookup *pl;
100 if (!phy || !dev_id || !con_id)
103 mutex_lock(&phy_provider_mutex);
104 list_for_each_entry(pl, &phys, node)
105 if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) &&
106 !strcmp(pl->con_id, con_id)) {
111 mutex_unlock(&phy_provider_mutex);
113 EXPORT_SYMBOL_GPL(phy_remove_lookup);
115 static struct phy *phy_find(struct device *dev, const char *con_id)
117 const char *dev_id = dev_name(dev);
118 struct phy_lookup *p, *pl = NULL;
120 mutex_lock(&phy_provider_mutex);
121 list_for_each_entry(p, &phys, node)
122 if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) {
126 mutex_unlock(&phy_provider_mutex);
128 return pl ? pl->phy : ERR_PTR(-ENODEV);
131 static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
133 struct phy_provider *phy_provider;
134 struct device_node *child;
136 list_for_each_entry(phy_provider, &phy_provider_list, list) {
137 if (phy_provider->dev->of_node == node)
140 for_each_child_of_node(phy_provider->children, child)
145 return ERR_PTR(-EPROBE_DEFER);
148 int phy_pm_runtime_get(struct phy *phy)
155 if (!pm_runtime_enabled(&phy->dev))
158 ret = pm_runtime_get(&phy->dev);
159 if (ret < 0 && ret != -EINPROGRESS)
160 pm_runtime_put_noidle(&phy->dev);
164 EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
166 int phy_pm_runtime_get_sync(struct phy *phy)
173 if (!pm_runtime_enabled(&phy->dev))
176 ret = pm_runtime_get_sync(&phy->dev);
178 pm_runtime_put_sync(&phy->dev);
182 EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
184 int phy_pm_runtime_put(struct phy *phy)
189 if (!pm_runtime_enabled(&phy->dev))
192 return pm_runtime_put(&phy->dev);
194 EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
196 int phy_pm_runtime_put_sync(struct phy *phy)
201 if (!pm_runtime_enabled(&phy->dev))
204 return pm_runtime_put_sync(&phy->dev);
206 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
208 void phy_pm_runtime_allow(struct phy *phy)
213 if (!pm_runtime_enabled(&phy->dev))
216 pm_runtime_allow(&phy->dev);
218 EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
220 void phy_pm_runtime_forbid(struct phy *phy)
225 if (!pm_runtime_enabled(&phy->dev))
228 pm_runtime_forbid(&phy->dev);
230 EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
232 int phy_init(struct phy *phy)
239 ret = phy_pm_runtime_get_sync(phy);
240 if (ret < 0 && ret != -ENOTSUPP)
242 ret = 0; /* Override possible ret == -ENOTSUPP */
244 mutex_lock(&phy->mutex);
245 if (phy->init_count == 0 && phy->ops->init) {
246 ret = phy->ops->init(phy);
248 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
255 mutex_unlock(&phy->mutex);
256 phy_pm_runtime_put(phy);
259 EXPORT_SYMBOL_GPL(phy_init);
261 int phy_exit(struct phy *phy)
268 ret = phy_pm_runtime_get_sync(phy);
269 if (ret < 0 && ret != -ENOTSUPP)
271 ret = 0; /* Override possible ret == -ENOTSUPP */
273 mutex_lock(&phy->mutex);
274 if (phy->init_count == 1 && phy->ops->exit) {
275 ret = phy->ops->exit(phy);
277 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
284 mutex_unlock(&phy->mutex);
285 phy_pm_runtime_put(phy);
288 EXPORT_SYMBOL_GPL(phy_exit);
290 int phy_power_on(struct phy *phy)
298 ret = regulator_enable(phy->pwr);
303 ret = phy_pm_runtime_get_sync(phy);
304 if (ret < 0 && ret != -ENOTSUPP)
307 ret = 0; /* Override possible ret == -ENOTSUPP */
309 mutex_lock(&phy->mutex);
310 if (phy->power_count == 0 && phy->ops->power_on) {
311 ret = phy->ops->power_on(phy);
313 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
318 mutex_unlock(&phy->mutex);
322 mutex_unlock(&phy->mutex);
323 phy_pm_runtime_put_sync(phy);
326 regulator_disable(phy->pwr);
330 EXPORT_SYMBOL_GPL(phy_power_on);
332 int phy_power_off(struct phy *phy)
339 mutex_lock(&phy->mutex);
340 if (phy->power_count == 1 && phy->ops->power_off) {
341 ret = phy->ops->power_off(phy);
343 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
344 mutex_unlock(&phy->mutex);
349 mutex_unlock(&phy->mutex);
350 phy_pm_runtime_put(phy);
353 regulator_disable(phy->pwr);
357 EXPORT_SYMBOL_GPL(phy_power_off);
359 int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode)
363 if (!phy || !phy->ops->set_mode)
366 mutex_lock(&phy->mutex);
367 ret = phy->ops->set_mode(phy, mode, submode);
369 phy->attrs.mode = mode;
370 mutex_unlock(&phy->mutex);
374 EXPORT_SYMBOL_GPL(phy_set_mode_ext);
376 int phy_reset(struct phy *phy)
380 if (!phy || !phy->ops->reset)
383 ret = phy_pm_runtime_get_sync(phy);
384 if (ret < 0 && ret != -ENOTSUPP)
387 mutex_lock(&phy->mutex);
388 ret = phy->ops->reset(phy);
389 mutex_unlock(&phy->mutex);
391 phy_pm_runtime_put(phy);
395 EXPORT_SYMBOL_GPL(phy_reset);
398 * phy_calibrate() - Tunes the phy hw parameters for current configuration
399 * @phy: the phy returned by phy_get()
401 * Used to calibrate phy hardware, typically by adjusting some parameters in
402 * runtime, which are otherwise lost after host controller reset and cannot
403 * be applied in phy_init() or phy_power_on().
405 * Returns: 0 if successful, an negative error code otherwise
407 int phy_calibrate(struct phy *phy)
411 if (!phy || !phy->ops->calibrate)
414 mutex_lock(&phy->mutex);
415 ret = phy->ops->calibrate(phy);
416 mutex_unlock(&phy->mutex);
420 EXPORT_SYMBOL_GPL(phy_calibrate);
423 * phy_configure() - Changes the phy parameters
424 * @phy: the phy returned by phy_get()
425 * @opts: New configuration to apply
427 * Used to change the PHY parameters. phy_init() must have been called
428 * on the phy. The configuration will be applied on the current phy
429 * mode, that can be changed using phy_set_mode().
431 * Returns: 0 if successful, an negative error code otherwise
433 int phy_configure(struct phy *phy, union phy_configure_opts *opts)
440 if (!phy->ops->configure)
443 mutex_lock(&phy->mutex);
444 ret = phy->ops->configure(phy, opts);
445 mutex_unlock(&phy->mutex);
449 EXPORT_SYMBOL_GPL(phy_configure);
452 * phy_validate() - Checks the phy parameters
453 * @phy: the phy returned by phy_get()
454 * @mode: phy_mode the configuration is applicable to.
455 * @submode: PHY submode the configuration is applicable to.
456 * @opts: Configuration to check
458 * Used to check that the current set of parameters can be handled by
459 * the phy. Implementations are free to tune the parameters passed as
460 * arguments if needed by some implementation detail or
461 * constraints. It will not change any actual configuration of the
462 * PHY, so calling it as many times as deemed fit will have no side
465 * Returns: 0 if successful, an negative error code otherwise
467 int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
468 union phy_configure_opts *opts)
475 if (!phy->ops->validate)
478 mutex_lock(&phy->mutex);
479 ret = phy->ops->validate(phy, mode, submode, opts);
480 mutex_unlock(&phy->mutex);
484 EXPORT_SYMBOL_GPL(phy_validate);
487 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
488 * @np: device_node for which to get the phy
489 * @index: the index of the phy
491 * Returns the phy associated with the given phandle value,
492 * after getting a refcount to it or -ENODEV if there is no such phy or
493 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
494 * not yet loaded. This function uses of_xlate call back function provided
495 * while registering the phy_provider to find the phy instance.
497 static struct phy *_of_phy_get(struct device_node *np, int index)
500 struct phy_provider *phy_provider;
501 struct phy *phy = NULL;
502 struct of_phandle_args args;
504 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
507 return ERR_PTR(-ENODEV);
509 /* This phy type handled by the usb-phy subsystem for now */
510 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
511 return ERR_PTR(-ENODEV);
513 mutex_lock(&phy_provider_mutex);
514 phy_provider = of_phy_provider_lookup(args.np);
515 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
516 phy = ERR_PTR(-EPROBE_DEFER);
520 if (!of_device_is_available(args.np)) {
521 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
522 phy = ERR_PTR(-ENODEV);
526 phy = phy_provider->of_xlate(phy_provider->dev, &args);
529 module_put(phy_provider->owner);
532 mutex_unlock(&phy_provider_mutex);
533 of_node_put(args.np);
539 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
540 * @np: device_node for which to get the phy
541 * @con_id: name of the phy from device's point of view
543 * Returns the phy driver, after getting a refcount to it; or
544 * -ENODEV if there is no such phy. The caller is responsible for
545 * calling phy_put() to release that count.
547 struct phy *of_phy_get(struct device_node *np, const char *con_id)
549 struct phy *phy = NULL;
553 index = of_property_match_string(np, "phy-names", con_id);
555 phy = _of_phy_get(np, index);
559 if (!try_module_get(phy->ops->owner))
560 return ERR_PTR(-EPROBE_DEFER);
562 get_device(&phy->dev);
566 EXPORT_SYMBOL_GPL(of_phy_get);
569 * phy_put() - release the PHY
570 * @phy: the phy returned by phy_get()
572 * Releases a refcount the caller received from phy_get().
574 void phy_put(struct phy *phy)
576 if (!phy || IS_ERR(phy))
579 mutex_lock(&phy->mutex);
580 if (phy->ops->release)
581 phy->ops->release(phy);
582 mutex_unlock(&phy->mutex);
584 module_put(phy->ops->owner);
585 put_device(&phy->dev);
587 EXPORT_SYMBOL_GPL(phy_put);
590 * devm_phy_put() - release the PHY
591 * @dev: device that wants to release this phy
592 * @phy: the phy returned by devm_phy_get()
594 * destroys the devres associated with this phy and invokes phy_put
595 * to release the phy.
597 void devm_phy_put(struct device *dev, struct phy *phy)
604 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
605 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
607 EXPORT_SYMBOL_GPL(devm_phy_put);
610 * of_phy_simple_xlate() - returns the phy instance from phy provider
611 * @dev: the PHY provider device
612 * @args: of_phandle_args (not used here)
614 * Intended to be used by phy provider for the common case where #phy-cells is
615 * 0. For other cases where #phy-cells is greater than '0', the phy provider
616 * should provide a custom of_xlate function that reads the *args* and returns
617 * the appropriate phy.
619 struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
623 struct class_dev_iter iter;
625 class_dev_iter_init(&iter, phy_class, NULL, NULL);
626 while ((dev = class_dev_iter_next(&iter))) {
628 if (args->np != phy->dev.of_node)
631 class_dev_iter_exit(&iter);
635 class_dev_iter_exit(&iter);
636 return ERR_PTR(-ENODEV);
638 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
641 * phy_get() - lookup and obtain a reference to a phy.
642 * @dev: device that requests this phy
643 * @string: the phy name as given in the dt data or the name of the controller
644 * port for non-dt case
646 * Returns the phy driver, after getting a refcount to it; or
647 * -ENODEV if there is no such phy. The caller is responsible for
648 * calling phy_put() to release that count.
650 struct phy *phy_get(struct device *dev, const char *string)
655 if (string == NULL) {
656 dev_WARN(dev, "missing string\n");
657 return ERR_PTR(-EINVAL);
661 index = of_property_match_string(dev->of_node, "phy-names",
663 phy = _of_phy_get(dev->of_node, index);
665 phy = phy_find(dev, string);
670 if (!try_module_get(phy->ops->owner))
671 return ERR_PTR(-EPROBE_DEFER);
673 get_device(&phy->dev);
677 EXPORT_SYMBOL_GPL(phy_get);
680 * phy_optional_get() - lookup and obtain a reference to an optional phy.
681 * @dev: device that requests this phy
682 * @string: the phy name as given in the dt data or the name of the controller
683 * port for non-dt case
685 * Returns the phy driver, after getting a refcount to it; or
686 * NULL if there is no such phy. The caller is responsible for
687 * calling phy_put() to release that count.
689 struct phy *phy_optional_get(struct device *dev, const char *string)
691 struct phy *phy = phy_get(dev, string);
693 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
698 EXPORT_SYMBOL_GPL(phy_optional_get);
701 * devm_phy_get() - lookup and obtain a reference to a phy.
702 * @dev: device that requests this phy
703 * @string: the phy name as given in the dt data or phy device name
706 * Gets the phy using phy_get(), and associates a device with it using
707 * devres. On driver detach, release function is invoked on the devres data,
708 * then, devres data is freed.
710 struct phy *devm_phy_get(struct device *dev, const char *string)
712 struct phy **ptr, *phy;
714 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
716 return ERR_PTR(-ENOMEM);
718 phy = phy_get(dev, string);
721 devres_add(dev, ptr);
728 EXPORT_SYMBOL_GPL(devm_phy_get);
731 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
732 * @dev: device that requests this phy
733 * @string: the phy name as given in the dt data or phy device name
736 * Gets the phy using phy_get(), and associates a device with it using
737 * devres. On driver detach, release function is invoked on the devres
738 * data, then, devres data is freed. This differs to devm_phy_get() in
739 * that if the phy does not exist, it is not considered an error and
740 * -ENODEV will not be returned. Instead the NULL phy is returned,
741 * which can be passed to all other phy consumer calls.
743 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
745 struct phy *phy = devm_phy_get(dev, string);
747 if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
752 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
755 * devm_of_phy_get() - lookup and obtain a reference to a phy.
756 * @dev: device that requests this phy
757 * @np: node containing the phy
758 * @con_id: name of the phy from device's point of view
760 * Gets the phy using of_phy_get(), and associates a device with it using
761 * devres. On driver detach, release function is invoked on the devres data,
762 * then, devres data is freed.
764 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
767 struct phy **ptr, *phy;
769 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
771 return ERR_PTR(-ENOMEM);
773 phy = of_phy_get(np, con_id);
776 devres_add(dev, ptr);
783 EXPORT_SYMBOL_GPL(devm_of_phy_get);
786 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
787 * @dev: device that requests this phy
788 * @np: node containing the phy
789 * @index: index of the phy
791 * Gets the phy using _of_phy_get(), then gets a refcount to it,
792 * and associates a device with it using devres. On driver detach,
793 * release function is invoked on the devres data,
794 * then, devres data is freed.
797 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
800 struct phy **ptr, *phy;
802 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
804 return ERR_PTR(-ENOMEM);
806 phy = _of_phy_get(np, index);
812 if (!try_module_get(phy->ops->owner)) {
814 return ERR_PTR(-EPROBE_DEFER);
817 get_device(&phy->dev);
820 devres_add(dev, ptr);
824 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
827 * phy_create() - create a new phy
828 * @dev: device that is creating the new phy
829 * @node: device node of the phy
830 * @ops: function pointers for performing phy operations
832 * Called to create a phy using phy framework.
834 struct phy *phy_create(struct device *dev, struct device_node *node,
835 const struct phy_ops *ops)
842 return ERR_PTR(-EINVAL);
844 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
846 return ERR_PTR(-ENOMEM);
848 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
850 dev_err(dev, "unable to get id\n");
855 device_initialize(&phy->dev);
856 mutex_init(&phy->mutex);
858 phy->dev.class = phy_class;
859 phy->dev.parent = dev;
860 phy->dev.of_node = node ?: dev->of_node;
864 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
869 phy->pwr = regulator_get_optional(&phy->dev, "phy");
870 if (IS_ERR(phy->pwr)) {
871 ret = PTR_ERR(phy->pwr);
872 if (ret == -EPROBE_DEFER)
878 ret = device_add(&phy->dev);
882 if (pm_runtime_enabled(dev)) {
883 pm_runtime_enable(&phy->dev);
884 pm_runtime_no_callbacks(&phy->dev);
890 put_device(&phy->dev); /* calls phy_release() which frees resources */
897 EXPORT_SYMBOL_GPL(phy_create);
900 * devm_phy_create() - create a new phy
901 * @dev: device that is creating the new phy
902 * @node: device node of the phy
903 * @ops: function pointers for performing phy operations
905 * Creates a new PHY device adding it to the PHY class.
906 * While at that, it also associates the device with the phy using devres.
907 * On driver detach, release function is invoked on the devres data,
908 * then, devres data is freed.
910 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
911 const struct phy_ops *ops)
913 struct phy **ptr, *phy;
915 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
917 return ERR_PTR(-ENOMEM);
919 phy = phy_create(dev, node, ops);
922 devres_add(dev, ptr);
929 EXPORT_SYMBOL_GPL(devm_phy_create);
932 * phy_destroy() - destroy the phy
933 * @phy: the phy to be destroyed
935 * Called to destroy the phy.
937 void phy_destroy(struct phy *phy)
939 pm_runtime_disable(&phy->dev);
940 device_unregister(&phy->dev);
942 EXPORT_SYMBOL_GPL(phy_destroy);
945 * devm_phy_destroy() - destroy the PHY
946 * @dev: device that wants to release this phy
947 * @phy: the phy returned by devm_phy_get()
949 * destroys the devres associated with this phy and invokes phy_destroy
950 * to destroy the phy.
952 void devm_phy_destroy(struct device *dev, struct phy *phy)
956 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
957 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
959 EXPORT_SYMBOL_GPL(devm_phy_destroy);
962 * __of_phy_provider_register() - create/register phy provider with the framework
963 * @dev: struct device of the phy provider
964 * @children: device node containing children (if different from dev->of_node)
965 * @owner: the module owner containing of_xlate
966 * @of_xlate: function pointer to obtain phy instance from phy provider
968 * Creates struct phy_provider from dev and of_xlate function pointer.
969 * This is used in the case of dt boot for finding the phy instance from
972 * If the PHY provider doesn't nest children directly but uses a separate
973 * child node to contain the individual children, the @children parameter
974 * can be used to override the default. If NULL, the default (dev->of_node)
975 * will be used. If non-NULL, the device node must be a child (or further
976 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
977 * error code is returned.
979 struct phy_provider *__of_phy_provider_register(struct device *dev,
980 struct device_node *children, struct module *owner,
981 struct phy * (*of_xlate)(struct device *dev,
982 struct of_phandle_args *args))
984 struct phy_provider *phy_provider;
987 * If specified, the device node containing the children must itself
988 * be the provider's device node or a child (or further descendant)
992 struct device_node *parent = of_node_get(children), *next;
995 if (parent == dev->of_node)
998 next = of_get_parent(parent);
1004 return ERR_PTR(-EINVAL);
1006 of_node_put(parent);
1008 children = dev->of_node;
1011 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
1013 return ERR_PTR(-ENOMEM);
1015 phy_provider->dev = dev;
1016 phy_provider->children = of_node_get(children);
1017 phy_provider->owner = owner;
1018 phy_provider->of_xlate = of_xlate;
1020 mutex_lock(&phy_provider_mutex);
1021 list_add_tail(&phy_provider->list, &phy_provider_list);
1022 mutex_unlock(&phy_provider_mutex);
1024 return phy_provider;
1026 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
1029 * __devm_of_phy_provider_register() - create/register phy provider with the
1031 * @dev: struct device of the phy provider
1032 * @owner: the module owner containing of_xlate
1033 * @of_xlate: function pointer to obtain phy instance from phy provider
1035 * Creates struct phy_provider from dev and of_xlate function pointer.
1036 * This is used in the case of dt boot for finding the phy instance from
1037 * phy provider. While at that, it also associates the device with the
1038 * phy provider using devres. On driver detach, release function is invoked
1039 * on the devres data, then, devres data is freed.
1041 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
1042 struct device_node *children, struct module *owner,
1043 struct phy * (*of_xlate)(struct device *dev,
1044 struct of_phandle_args *args))
1046 struct phy_provider **ptr, *phy_provider;
1048 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
1050 return ERR_PTR(-ENOMEM);
1052 phy_provider = __of_phy_provider_register(dev, children, owner,
1054 if (!IS_ERR(phy_provider)) {
1055 *ptr = phy_provider;
1056 devres_add(dev, ptr);
1061 return phy_provider;
1063 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
1066 * of_phy_provider_unregister() - unregister phy provider from the framework
1067 * @phy_provider: phy provider returned by of_phy_provider_register()
1069 * Removes the phy_provider created using of_phy_provider_register().
1071 void of_phy_provider_unregister(struct phy_provider *phy_provider)
1073 if (IS_ERR(phy_provider))
1076 mutex_lock(&phy_provider_mutex);
1077 list_del(&phy_provider->list);
1078 of_node_put(phy_provider->children);
1079 kfree(phy_provider);
1080 mutex_unlock(&phy_provider_mutex);
1082 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1085 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1086 * @dev: struct device of the phy provider
1088 * destroys the devres associated with this phy provider and invokes
1089 * of_phy_provider_unregister to unregister the phy provider.
1091 void devm_of_phy_provider_unregister(struct device *dev,
1092 struct phy_provider *phy_provider) {
1095 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
1097 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1099 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1102 * phy_release() - release the phy
1103 * @dev: the dev member within phy
1105 * When the last reference to the device is removed, it is called
1106 * from the embedded kobject as release method.
1108 static void phy_release(struct device *dev)
1113 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
1114 regulator_put(phy->pwr);
1115 ida_simple_remove(&phy_ida, phy->id);
1119 static int __init phy_core_init(void)
1121 phy_class = class_create(THIS_MODULE, "phy");
1122 if (IS_ERR(phy_class)) {
1123 pr_err("failed to create phy class --> %ld\n",
1124 PTR_ERR(phy_class));
1125 return PTR_ERR(phy_class);
1128 phy_class->dev_release = phy_release;
1132 device_initcall(phy_core_init);