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);
233 * phy_init - phy internal initialization before phy operation
234 * @phy: the phy returned by phy_get()
236 * Used to allow phy's driver to perform phy internal initialization,
237 * such as PLL block powering, clock initialization or anything that's
238 * is required by the phy to perform the start of operation.
239 * Must be called before phy_power_on().
241 * Return: %0 if successful, a negative error code otherwise
243 int phy_init(struct phy *phy)
250 ret = phy_pm_runtime_get_sync(phy);
251 if (ret < 0 && ret != -ENOTSUPP)
253 ret = 0; /* Override possible ret == -ENOTSUPP */
255 mutex_lock(&phy->mutex);
256 if (phy->power_count > phy->init_count)
257 dev_warn(&phy->dev, "phy_power_on was called before phy_init\n");
259 if (phy->init_count == 0 && phy->ops->init) {
260 ret = phy->ops->init(phy);
262 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
269 mutex_unlock(&phy->mutex);
270 phy_pm_runtime_put(phy);
273 EXPORT_SYMBOL_GPL(phy_init);
276 * phy_exit - Phy internal un-initialization
277 * @phy: the phy returned by phy_get()
279 * Must be called after phy_power_off().
281 * Return: %0 if successful, a negative error code otherwise
283 int phy_exit(struct phy *phy)
290 ret = phy_pm_runtime_get_sync(phy);
291 if (ret < 0 && ret != -ENOTSUPP)
293 ret = 0; /* Override possible ret == -ENOTSUPP */
295 mutex_lock(&phy->mutex);
296 if (phy->init_count == 1 && phy->ops->exit) {
297 ret = phy->ops->exit(phy);
299 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
306 mutex_unlock(&phy->mutex);
307 phy_pm_runtime_put(phy);
310 EXPORT_SYMBOL_GPL(phy_exit);
313 * phy_power_on - Enable the phy and enter proper operation
314 * @phy: the phy returned by phy_get()
316 * Must be called after phy_init().
318 * Return: %0 if successful, a negative error code otherwise
320 int phy_power_on(struct phy *phy)
328 ret = regulator_enable(phy->pwr);
333 ret = phy_pm_runtime_get_sync(phy);
334 if (ret < 0 && ret != -ENOTSUPP)
337 ret = 0; /* Override possible ret == -ENOTSUPP */
339 mutex_lock(&phy->mutex);
340 if (phy->power_count == 0 && phy->ops->power_on) {
341 ret = phy->ops->power_on(phy);
343 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
348 mutex_unlock(&phy->mutex);
352 mutex_unlock(&phy->mutex);
353 phy_pm_runtime_put_sync(phy);
356 regulator_disable(phy->pwr);
360 EXPORT_SYMBOL_GPL(phy_power_on);
363 * phy_power_off - Disable the phy.
364 * @phy: the phy returned by phy_get()
366 * Must be called before phy_exit().
368 * Return: %0 if successful, a negative error code otherwise
370 int phy_power_off(struct phy *phy)
377 mutex_lock(&phy->mutex);
378 if (phy->power_count == 1 && phy->ops->power_off) {
379 ret = phy->ops->power_off(phy);
381 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
382 mutex_unlock(&phy->mutex);
387 mutex_unlock(&phy->mutex);
388 phy_pm_runtime_put(phy);
391 regulator_disable(phy->pwr);
395 EXPORT_SYMBOL_GPL(phy_power_off);
397 int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode)
401 if (!phy || !phy->ops->set_mode)
404 mutex_lock(&phy->mutex);
405 ret = phy->ops->set_mode(phy, mode, submode);
407 phy->attrs.mode = mode;
408 mutex_unlock(&phy->mutex);
412 EXPORT_SYMBOL_GPL(phy_set_mode_ext);
414 int phy_set_media(struct phy *phy, enum phy_media media)
418 if (!phy || !phy->ops->set_media)
421 mutex_lock(&phy->mutex);
422 ret = phy->ops->set_media(phy, media);
423 mutex_unlock(&phy->mutex);
427 EXPORT_SYMBOL_GPL(phy_set_media);
429 int phy_set_speed(struct phy *phy, int speed)
433 if (!phy || !phy->ops->set_speed)
436 mutex_lock(&phy->mutex);
437 ret = phy->ops->set_speed(phy, speed);
438 mutex_unlock(&phy->mutex);
442 EXPORT_SYMBOL_GPL(phy_set_speed);
444 int phy_reset(struct phy *phy)
448 if (!phy || !phy->ops->reset)
451 ret = phy_pm_runtime_get_sync(phy);
452 if (ret < 0 && ret != -ENOTSUPP)
455 mutex_lock(&phy->mutex);
456 ret = phy->ops->reset(phy);
457 mutex_unlock(&phy->mutex);
459 phy_pm_runtime_put(phy);
463 EXPORT_SYMBOL_GPL(phy_reset);
466 * phy_calibrate() - Tunes the phy hw parameters for current configuration
467 * @phy: the phy returned by phy_get()
469 * Used to calibrate phy hardware, typically by adjusting some parameters in
470 * runtime, which are otherwise lost after host controller reset and cannot
471 * be applied in phy_init() or phy_power_on().
473 * Return: %0 if successful, a negative error code otherwise
475 int phy_calibrate(struct phy *phy)
479 if (!phy || !phy->ops->calibrate)
482 mutex_lock(&phy->mutex);
483 ret = phy->ops->calibrate(phy);
484 mutex_unlock(&phy->mutex);
488 EXPORT_SYMBOL_GPL(phy_calibrate);
491 * phy_configure() - Changes the phy parameters
492 * @phy: the phy returned by phy_get()
493 * @opts: New configuration to apply
495 * Used to change the PHY parameters. phy_init() must have been called
496 * on the phy. The configuration will be applied on the current phy
497 * mode, that can be changed using phy_set_mode().
499 * Return: %0 if successful, a negative error code otherwise
501 int phy_configure(struct phy *phy, union phy_configure_opts *opts)
508 if (!phy->ops->configure)
511 mutex_lock(&phy->mutex);
512 ret = phy->ops->configure(phy, opts);
513 mutex_unlock(&phy->mutex);
517 EXPORT_SYMBOL_GPL(phy_configure);
520 * phy_validate() - Checks the phy parameters
521 * @phy: the phy returned by phy_get()
522 * @mode: phy_mode the configuration is applicable to.
523 * @submode: PHY submode the configuration is applicable to.
524 * @opts: Configuration to check
526 * Used to check that the current set of parameters can be handled by
527 * the phy. Implementations are free to tune the parameters passed as
528 * arguments if needed by some implementation detail or
529 * constraints. It will not change any actual configuration of the
530 * PHY, so calling it as many times as deemed fit will have no side
533 * Return: %0 if successful, a negative error code otherwise
535 int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
536 union phy_configure_opts *opts)
543 if (!phy->ops->validate)
546 mutex_lock(&phy->mutex);
547 ret = phy->ops->validate(phy, mode, submode, opts);
548 mutex_unlock(&phy->mutex);
552 EXPORT_SYMBOL_GPL(phy_validate);
555 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
556 * @np: device_node for which to get the phy
557 * @index: the index of the phy
559 * Returns the phy associated with the given phandle value,
560 * after getting a refcount to it or -ENODEV if there is no such phy or
561 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
562 * not yet loaded. This function uses of_xlate call back function provided
563 * while registering the phy_provider to find the phy instance.
565 static struct phy *_of_phy_get(struct device_node *np, int index)
568 struct phy_provider *phy_provider;
569 struct phy *phy = NULL;
570 struct of_phandle_args args;
572 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
575 return ERR_PTR(-ENODEV);
577 /* This phy type handled by the usb-phy subsystem for now */
578 if (of_device_is_compatible(args.np, "usb-nop-xceiv"))
579 return ERR_PTR(-ENODEV);
581 mutex_lock(&phy_provider_mutex);
582 phy_provider = of_phy_provider_lookup(args.np);
583 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
584 phy = ERR_PTR(-EPROBE_DEFER);
588 if (!of_device_is_available(args.np)) {
589 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
590 phy = ERR_PTR(-ENODEV);
594 phy = phy_provider->of_xlate(phy_provider->dev, &args);
597 module_put(phy_provider->owner);
600 mutex_unlock(&phy_provider_mutex);
601 of_node_put(args.np);
607 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
608 * @np: device_node for which to get the phy
609 * @con_id: name of the phy from device's point of view
611 * Returns the phy driver, after getting a refcount to it; or
612 * -ENODEV if there is no such phy. The caller is responsible for
613 * calling phy_put() to release that count.
615 struct phy *of_phy_get(struct device_node *np, const char *con_id)
617 struct phy *phy = NULL;
621 index = of_property_match_string(np, "phy-names", con_id);
623 phy = _of_phy_get(np, index);
627 if (!try_module_get(phy->ops->owner))
628 return ERR_PTR(-EPROBE_DEFER);
630 get_device(&phy->dev);
634 EXPORT_SYMBOL_GPL(of_phy_get);
637 * of_phy_put() - release the PHY
638 * @phy: the phy returned by of_phy_get()
640 * Releases a refcount the caller received from of_phy_get().
642 void of_phy_put(struct phy *phy)
644 if (!phy || IS_ERR(phy))
647 mutex_lock(&phy->mutex);
648 if (phy->ops->release)
649 phy->ops->release(phy);
650 mutex_unlock(&phy->mutex);
652 module_put(phy->ops->owner);
653 put_device(&phy->dev);
655 EXPORT_SYMBOL_GPL(of_phy_put);
658 * phy_put() - release the PHY
659 * @dev: device that wants to release this phy
660 * @phy: the phy returned by phy_get()
662 * Releases a refcount the caller received from phy_get().
664 void phy_put(struct device *dev, struct phy *phy)
666 device_link_remove(dev, &phy->dev);
669 EXPORT_SYMBOL_GPL(phy_put);
672 * devm_phy_put() - release the PHY
673 * @dev: device that wants to release this phy
674 * @phy: the phy returned by devm_phy_get()
676 * destroys the devres associated with this phy and invokes phy_put
677 * to release the phy.
679 void devm_phy_put(struct device *dev, struct phy *phy)
686 r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
687 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
689 EXPORT_SYMBOL_GPL(devm_phy_put);
692 * of_phy_simple_xlate() - returns the phy instance from phy provider
693 * @dev: the PHY provider device
694 * @args: of_phandle_args (not used here)
696 * Intended to be used by phy provider for the common case where #phy-cells is
697 * 0. For other cases where #phy-cells is greater than '0', the phy provider
698 * should provide a custom of_xlate function that reads the *args* and returns
699 * the appropriate phy.
701 struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
705 struct class_dev_iter iter;
707 class_dev_iter_init(&iter, phy_class, NULL, NULL);
708 while ((dev = class_dev_iter_next(&iter))) {
710 if (args->np != phy->dev.of_node)
713 class_dev_iter_exit(&iter);
717 class_dev_iter_exit(&iter);
718 return ERR_PTR(-ENODEV);
720 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
723 * phy_get() - lookup and obtain a reference to a phy.
724 * @dev: device that requests this phy
725 * @string: the phy name as given in the dt data or the name of the controller
726 * port for non-dt case
728 * Returns the phy driver, after getting a refcount to it; or
729 * -ENODEV if there is no such phy. The caller is responsible for
730 * calling phy_put() to release that count.
732 struct phy *phy_get(struct device *dev, const char *string)
736 struct device_link *link;
740 index = of_property_match_string(dev->of_node, "phy-names",
744 phy = _of_phy_get(dev->of_node, index);
746 if (string == NULL) {
747 dev_WARN(dev, "missing string\n");
748 return ERR_PTR(-EINVAL);
750 phy = phy_find(dev, string);
755 if (!try_module_get(phy->ops->owner))
756 return ERR_PTR(-EPROBE_DEFER);
758 get_device(&phy->dev);
760 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
762 dev_dbg(dev, "failed to create device link to %s\n",
763 dev_name(phy->dev.parent));
767 EXPORT_SYMBOL_GPL(phy_get);
770 * devm_phy_get() - lookup and obtain a reference to a phy.
771 * @dev: device that requests this phy
772 * @string: the phy name as given in the dt data or phy device name
775 * Gets the phy using phy_get(), and associates a device with it using
776 * devres. On driver detach, release function is invoked on the devres data,
777 * then, devres data is freed.
779 struct phy *devm_phy_get(struct device *dev, const char *string)
781 struct phy **ptr, *phy;
783 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
785 return ERR_PTR(-ENOMEM);
787 phy = phy_get(dev, string);
790 devres_add(dev, ptr);
797 EXPORT_SYMBOL_GPL(devm_phy_get);
800 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
801 * @dev: device that requests this phy
802 * @string: the phy name as given in the dt data or phy device name
805 * Gets the phy using phy_get(), and associates a device with it using
806 * devres. On driver detach, release function is invoked on the devres
807 * data, then, devres data is freed. This differs to devm_phy_get() in
808 * that if the phy does not exist, it is not considered an error and
809 * -ENODEV will not be returned. Instead the NULL phy is returned,
810 * which can be passed to all other phy consumer calls.
812 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
814 struct phy *phy = devm_phy_get(dev, string);
816 if (PTR_ERR(phy) == -ENODEV)
821 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
824 * devm_of_phy_get() - lookup and obtain a reference to a phy.
825 * @dev: device that requests this phy
826 * @np: node containing the phy
827 * @con_id: name of the phy from device's point of view
829 * Gets the phy using of_phy_get(), and associates a device with it using
830 * devres. On driver detach, release function is invoked on the devres data,
831 * then, devres data is freed.
833 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
836 struct phy **ptr, *phy;
837 struct device_link *link;
839 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
841 return ERR_PTR(-ENOMEM);
843 phy = of_phy_get(np, con_id);
846 devres_add(dev, ptr);
852 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
854 dev_dbg(dev, "failed to create device link to %s\n",
855 dev_name(phy->dev.parent));
859 EXPORT_SYMBOL_GPL(devm_of_phy_get);
862 * devm_of_phy_optional_get() - lookup and obtain a reference to an optional
864 * @dev: device that requests this phy
865 * @np: node containing the phy
866 * @con_id: name of the phy from device's point of view
868 * Gets the phy using of_phy_get(), and associates a device with it using
869 * devres. On driver detach, release function is invoked on the devres data,
870 * then, devres data is freed. This differs to devm_of_phy_get() in
871 * that if the phy does not exist, it is not considered an error and
872 * -ENODEV will not be returned. Instead the NULL phy is returned,
873 * which can be passed to all other phy consumer calls.
875 struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np,
878 struct phy *phy = devm_of_phy_get(dev, np, con_id);
880 if (PTR_ERR(phy) == -ENODEV)
884 dev_err_probe(dev, PTR_ERR(phy), "failed to get PHY %pOF:%s",
889 EXPORT_SYMBOL_GPL(devm_of_phy_optional_get);
892 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
893 * @dev: device that requests this phy
894 * @np: node containing the phy
895 * @index: index of the phy
897 * Gets the phy using _of_phy_get(), then gets a refcount to it,
898 * and associates a device with it using devres. On driver detach,
899 * release function is invoked on the devres data,
900 * then, devres data is freed.
903 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
906 struct phy **ptr, *phy;
907 struct device_link *link;
909 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
911 return ERR_PTR(-ENOMEM);
913 phy = _of_phy_get(np, index);
919 if (!try_module_get(phy->ops->owner)) {
921 return ERR_PTR(-EPROBE_DEFER);
924 get_device(&phy->dev);
927 devres_add(dev, ptr);
929 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
931 dev_dbg(dev, "failed to create device link to %s\n",
932 dev_name(phy->dev.parent));
936 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
939 * phy_create() - create a new phy
940 * @dev: device that is creating the new phy
941 * @node: device node of the phy
942 * @ops: function pointers for performing phy operations
944 * Called to create a phy using phy framework.
946 struct phy *phy_create(struct device *dev, struct device_node *node,
947 const struct phy_ops *ops)
954 return ERR_PTR(-EINVAL);
956 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
958 return ERR_PTR(-ENOMEM);
960 id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
962 dev_err(dev, "unable to get id\n");
967 device_initialize(&phy->dev);
968 mutex_init(&phy->mutex);
970 phy->dev.class = phy_class;
971 phy->dev.parent = dev;
972 phy->dev.of_node = node ?: dev->of_node;
976 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
981 phy->pwr = regulator_get_optional(&phy->dev, "phy");
982 if (IS_ERR(phy->pwr)) {
983 ret = PTR_ERR(phy->pwr);
984 if (ret == -EPROBE_DEFER)
990 ret = device_add(&phy->dev);
994 if (pm_runtime_enabled(dev)) {
995 pm_runtime_enable(&phy->dev);
996 pm_runtime_no_callbacks(&phy->dev);
1002 put_device(&phy->dev); /* calls phy_release() which frees resources */
1003 return ERR_PTR(ret);
1007 return ERR_PTR(ret);
1009 EXPORT_SYMBOL_GPL(phy_create);
1012 * devm_phy_create() - create a new phy
1013 * @dev: device that is creating the new phy
1014 * @node: device node of the phy
1015 * @ops: function pointers for performing phy operations
1017 * Creates a new PHY device adding it to the PHY class.
1018 * While at that, it also associates the device with the phy using devres.
1019 * On driver detach, release function is invoked on the devres data,
1020 * then, devres data is freed.
1022 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
1023 const struct phy_ops *ops)
1025 struct phy **ptr, *phy;
1027 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
1029 return ERR_PTR(-ENOMEM);
1031 phy = phy_create(dev, node, ops);
1034 devres_add(dev, ptr);
1041 EXPORT_SYMBOL_GPL(devm_phy_create);
1044 * phy_destroy() - destroy the phy
1045 * @phy: the phy to be destroyed
1047 * Called to destroy the phy.
1049 void phy_destroy(struct phy *phy)
1051 pm_runtime_disable(&phy->dev);
1052 device_unregister(&phy->dev);
1054 EXPORT_SYMBOL_GPL(phy_destroy);
1057 * devm_phy_destroy() - destroy the PHY
1058 * @dev: device that wants to release this phy
1059 * @phy: the phy returned by devm_phy_get()
1061 * destroys the devres associated with this phy and invokes phy_destroy
1062 * to destroy the phy.
1064 void devm_phy_destroy(struct device *dev, struct phy *phy)
1068 r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
1069 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
1071 EXPORT_SYMBOL_GPL(devm_phy_destroy);
1074 * __of_phy_provider_register() - create/register phy provider with the framework
1075 * @dev: struct device of the phy provider
1076 * @children: device node containing children (if different from dev->of_node)
1077 * @owner: the module owner containing of_xlate
1078 * @of_xlate: function pointer to obtain phy instance from phy provider
1080 * Creates struct phy_provider from dev and of_xlate function pointer.
1081 * This is used in the case of dt boot for finding the phy instance from
1084 * If the PHY provider doesn't nest children directly but uses a separate
1085 * child node to contain the individual children, the @children parameter
1086 * can be used to override the default. If NULL, the default (dev->of_node)
1087 * will be used. If non-NULL, the device node must be a child (or further
1088 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
1089 * error code is returned.
1091 struct phy_provider *__of_phy_provider_register(struct device *dev,
1092 struct device_node *children, struct module *owner,
1093 struct phy * (*of_xlate)(struct device *dev,
1094 struct of_phandle_args *args))
1096 struct phy_provider *phy_provider;
1099 * If specified, the device node containing the children must itself
1100 * be the provider's device node or a child (or further descendant)
1104 struct device_node *parent = of_node_get(children), *next;
1107 if (parent == dev->of_node)
1110 next = of_get_parent(parent);
1111 of_node_put(parent);
1116 return ERR_PTR(-EINVAL);
1118 of_node_put(parent);
1120 children = dev->of_node;
1123 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
1125 return ERR_PTR(-ENOMEM);
1127 phy_provider->dev = dev;
1128 phy_provider->children = of_node_get(children);
1129 phy_provider->owner = owner;
1130 phy_provider->of_xlate = of_xlate;
1132 mutex_lock(&phy_provider_mutex);
1133 list_add_tail(&phy_provider->list, &phy_provider_list);
1134 mutex_unlock(&phy_provider_mutex);
1136 return phy_provider;
1138 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
1141 * __devm_of_phy_provider_register() - create/register phy provider with the
1143 * @dev: struct device of the phy provider
1144 * @children: device node containing children (if different from dev->of_node)
1145 * @owner: the module owner containing of_xlate
1146 * @of_xlate: function pointer to obtain phy instance from phy provider
1148 * Creates struct phy_provider from dev and of_xlate function pointer.
1149 * This is used in the case of dt boot for finding the phy instance from
1150 * phy provider. While at that, it also associates the device with the
1151 * phy provider using devres. On driver detach, release function is invoked
1152 * on the devres data, then, devres data is freed.
1154 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
1155 struct device_node *children, struct module *owner,
1156 struct phy * (*of_xlate)(struct device *dev,
1157 struct of_phandle_args *args))
1159 struct phy_provider **ptr, *phy_provider;
1161 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
1163 return ERR_PTR(-ENOMEM);
1165 phy_provider = __of_phy_provider_register(dev, children, owner,
1167 if (!IS_ERR(phy_provider)) {
1168 *ptr = phy_provider;
1169 devres_add(dev, ptr);
1174 return phy_provider;
1176 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
1179 * of_phy_provider_unregister() - unregister phy provider from the framework
1180 * @phy_provider: phy provider returned by of_phy_provider_register()
1182 * Removes the phy_provider created using of_phy_provider_register().
1184 void of_phy_provider_unregister(struct phy_provider *phy_provider)
1186 if (IS_ERR(phy_provider))
1189 mutex_lock(&phy_provider_mutex);
1190 list_del(&phy_provider->list);
1191 of_node_put(phy_provider->children);
1192 kfree(phy_provider);
1193 mutex_unlock(&phy_provider_mutex);
1195 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1198 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1199 * @dev: struct device of the phy provider
1200 * @phy_provider: phy provider returned by of_phy_provider_register()
1202 * destroys the devres associated with this phy provider and invokes
1203 * of_phy_provider_unregister to unregister the phy provider.
1205 void devm_of_phy_provider_unregister(struct device *dev,
1206 struct phy_provider *phy_provider)
1210 r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
1212 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1214 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1217 * phy_release() - release the phy
1218 * @dev: the dev member within phy
1220 * When the last reference to the device is removed, it is called
1221 * from the embedded kobject as release method.
1223 static void phy_release(struct device *dev)
1228 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
1229 regulator_put(phy->pwr);
1230 ida_simple_remove(&phy_ida, phy->id);
1234 static int __init phy_core_init(void)
1236 phy_class = class_create("phy");
1237 if (IS_ERR(phy_class)) {
1238 pr_err("failed to create phy class --> %ld\n",
1239 PTR_ERR(phy_class));
1240 return PTR_ERR(phy_class);
1243 phy_class->dev_release = phy_release;
1247 device_initcall(phy_core_init);