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/debugfs.h>
15 #include <linux/device.h>
16 #include <linux/slab.h>
18 #include <linux/phy/phy.h>
19 #include <linux/idr.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/regulator/consumer.h>
23 static void phy_release(struct device *dev);
24 static const struct class phy_class = {
26 .dev_release = phy_release,
29 static struct dentry *phy_debugfs_root;
30 static DEFINE_MUTEX(phy_provider_mutex);
31 static LIST_HEAD(phy_provider_list);
32 static LIST_HEAD(phys);
33 static DEFINE_IDA(phy_ida);
35 static void devm_phy_release(struct device *dev, void *res)
37 struct phy *phy = *(struct phy **)res;
42 static void devm_phy_provider_release(struct device *dev, void *res)
44 struct phy_provider *phy_provider = *(struct phy_provider **)res;
46 of_phy_provider_unregister(phy_provider);
49 static void devm_phy_consume(struct device *dev, void *res)
51 struct phy *phy = *(struct phy **)res;
56 static int devm_phy_match(struct device *dev, void *res, void *match_data)
58 struct phy **phy = res;
60 return *phy == match_data;
64 * phy_create_lookup() - allocate and register PHY/device association
65 * @phy: the phy of the association
66 * @con_id: connection ID string on device
67 * @dev_id: the device of the association
69 * Creates and registers phy_lookup entry.
71 int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id)
73 struct phy_lookup *pl;
75 if (!phy || !dev_id || !con_id)
78 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
86 mutex_lock(&phy_provider_mutex);
87 list_add_tail(&pl->node, &phys);
88 mutex_unlock(&phy_provider_mutex);
92 EXPORT_SYMBOL_GPL(phy_create_lookup);
95 * phy_remove_lookup() - find and remove PHY/device association
96 * @phy: the phy of the association
97 * @con_id: connection ID string on device
98 * @dev_id: the device of the association
100 * Finds and unregisters phy_lookup entry that was created with
101 * phy_create_lookup().
103 void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id)
105 struct phy_lookup *pl;
107 if (!phy || !dev_id || !con_id)
110 mutex_lock(&phy_provider_mutex);
111 list_for_each_entry(pl, &phys, node)
112 if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) &&
113 !strcmp(pl->con_id, con_id)) {
118 mutex_unlock(&phy_provider_mutex);
120 EXPORT_SYMBOL_GPL(phy_remove_lookup);
122 static struct phy *phy_find(struct device *dev, const char *con_id)
124 const char *dev_id = dev_name(dev);
125 struct phy_lookup *p, *pl = NULL;
127 mutex_lock(&phy_provider_mutex);
128 list_for_each_entry(p, &phys, node)
129 if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) {
133 mutex_unlock(&phy_provider_mutex);
135 return pl ? pl->phy : ERR_PTR(-ENODEV);
138 static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
140 struct phy_provider *phy_provider;
141 struct device_node *child;
143 list_for_each_entry(phy_provider, &phy_provider_list, list) {
144 if (phy_provider->dev->of_node == node)
147 for_each_child_of_node(phy_provider->children, child)
154 return ERR_PTR(-EPROBE_DEFER);
157 int phy_pm_runtime_get(struct phy *phy)
164 if (!pm_runtime_enabled(&phy->dev))
167 ret = pm_runtime_get(&phy->dev);
168 if (ret < 0 && ret != -EINPROGRESS)
169 pm_runtime_put_noidle(&phy->dev);
173 EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
175 int phy_pm_runtime_get_sync(struct phy *phy)
182 if (!pm_runtime_enabled(&phy->dev))
185 ret = pm_runtime_get_sync(&phy->dev);
187 pm_runtime_put_sync(&phy->dev);
191 EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
193 int phy_pm_runtime_put(struct phy *phy)
198 if (!pm_runtime_enabled(&phy->dev))
201 return pm_runtime_put(&phy->dev);
203 EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
205 int phy_pm_runtime_put_sync(struct phy *phy)
210 if (!pm_runtime_enabled(&phy->dev))
213 return pm_runtime_put_sync(&phy->dev);
215 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
217 void phy_pm_runtime_allow(struct phy *phy)
222 if (!pm_runtime_enabled(&phy->dev))
225 pm_runtime_allow(&phy->dev);
227 EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
229 void phy_pm_runtime_forbid(struct phy *phy)
234 if (!pm_runtime_enabled(&phy->dev))
237 pm_runtime_forbid(&phy->dev);
239 EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
242 * phy_init - phy internal initialization before phy operation
243 * @phy: the phy returned by phy_get()
245 * Used to allow phy's driver to perform phy internal initialization,
246 * such as PLL block powering, clock initialization or anything that's
247 * is required by the phy to perform the start of operation.
248 * Must be called before phy_power_on().
250 * Return: %0 if successful, a negative error code otherwise
252 int phy_init(struct phy *phy)
259 ret = phy_pm_runtime_get_sync(phy);
260 if (ret < 0 && ret != -ENOTSUPP)
262 ret = 0; /* Override possible ret == -ENOTSUPP */
264 mutex_lock(&phy->mutex);
265 if (phy->power_count > phy->init_count)
266 dev_warn(&phy->dev, "phy_power_on was called before phy_init\n");
268 if (phy->init_count == 0 && phy->ops->init) {
269 ret = phy->ops->init(phy);
271 dev_err(&phy->dev, "phy init failed --> %d\n", ret);
278 mutex_unlock(&phy->mutex);
279 phy_pm_runtime_put(phy);
282 EXPORT_SYMBOL_GPL(phy_init);
285 * phy_exit - Phy internal un-initialization
286 * @phy: the phy returned by phy_get()
288 * Must be called after phy_power_off().
290 * Return: %0 if successful, a negative error code otherwise
292 int phy_exit(struct phy *phy)
299 ret = phy_pm_runtime_get_sync(phy);
300 if (ret < 0 && ret != -ENOTSUPP)
302 ret = 0; /* Override possible ret == -ENOTSUPP */
304 mutex_lock(&phy->mutex);
305 if (phy->init_count == 1 && phy->ops->exit) {
306 ret = phy->ops->exit(phy);
308 dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
315 mutex_unlock(&phy->mutex);
316 phy_pm_runtime_put(phy);
319 EXPORT_SYMBOL_GPL(phy_exit);
322 * phy_power_on - Enable the phy and enter proper operation
323 * @phy: the phy returned by phy_get()
325 * Must be called after phy_init().
327 * Return: %0 if successful, a negative error code otherwise
329 int phy_power_on(struct phy *phy)
337 ret = regulator_enable(phy->pwr);
342 ret = phy_pm_runtime_get_sync(phy);
343 if (ret < 0 && ret != -ENOTSUPP)
346 ret = 0; /* Override possible ret == -ENOTSUPP */
348 mutex_lock(&phy->mutex);
349 if (phy->power_count == 0 && phy->ops->power_on) {
350 ret = phy->ops->power_on(phy);
352 dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
357 mutex_unlock(&phy->mutex);
361 mutex_unlock(&phy->mutex);
362 phy_pm_runtime_put_sync(phy);
365 regulator_disable(phy->pwr);
369 EXPORT_SYMBOL_GPL(phy_power_on);
372 * phy_power_off - Disable the phy.
373 * @phy: the phy returned by phy_get()
375 * Must be called before phy_exit().
377 * Return: %0 if successful, a negative error code otherwise
379 int phy_power_off(struct phy *phy)
386 mutex_lock(&phy->mutex);
387 if (phy->power_count == 1 && phy->ops->power_off) {
388 ret = phy->ops->power_off(phy);
390 dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
391 mutex_unlock(&phy->mutex);
396 mutex_unlock(&phy->mutex);
397 phy_pm_runtime_put(phy);
400 regulator_disable(phy->pwr);
404 EXPORT_SYMBOL_GPL(phy_power_off);
406 int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode)
410 if (!phy || !phy->ops->set_mode)
413 mutex_lock(&phy->mutex);
414 ret = phy->ops->set_mode(phy, mode, submode);
416 phy->attrs.mode = mode;
417 mutex_unlock(&phy->mutex);
421 EXPORT_SYMBOL_GPL(phy_set_mode_ext);
423 int phy_set_media(struct phy *phy, enum phy_media media)
427 if (!phy || !phy->ops->set_media)
430 mutex_lock(&phy->mutex);
431 ret = phy->ops->set_media(phy, media);
432 mutex_unlock(&phy->mutex);
436 EXPORT_SYMBOL_GPL(phy_set_media);
438 int phy_set_speed(struct phy *phy, int speed)
442 if (!phy || !phy->ops->set_speed)
445 mutex_lock(&phy->mutex);
446 ret = phy->ops->set_speed(phy, speed);
447 mutex_unlock(&phy->mutex);
451 EXPORT_SYMBOL_GPL(phy_set_speed);
453 int phy_reset(struct phy *phy)
457 if (!phy || !phy->ops->reset)
460 ret = phy_pm_runtime_get_sync(phy);
461 if (ret < 0 && ret != -ENOTSUPP)
464 mutex_lock(&phy->mutex);
465 ret = phy->ops->reset(phy);
466 mutex_unlock(&phy->mutex);
468 phy_pm_runtime_put(phy);
472 EXPORT_SYMBOL_GPL(phy_reset);
475 * phy_calibrate() - Tunes the phy hw parameters for current configuration
476 * @phy: the phy returned by phy_get()
478 * Used to calibrate phy hardware, typically by adjusting some parameters in
479 * runtime, which are otherwise lost after host controller reset and cannot
480 * be applied in phy_init() or phy_power_on().
482 * Return: %0 if successful, a negative error code otherwise
484 int phy_calibrate(struct phy *phy)
488 if (!phy || !phy->ops->calibrate)
491 mutex_lock(&phy->mutex);
492 ret = phy->ops->calibrate(phy);
493 mutex_unlock(&phy->mutex);
497 EXPORT_SYMBOL_GPL(phy_calibrate);
500 * phy_notify_connect() - phy connect notification
501 * @phy: the phy returned by phy_get()
502 * @port: the port index for connect
504 * If the phy needs to get connection status, the callback can be used.
505 * Returns: %0 if successful, a negative error code otherwise
507 int phy_notify_connect(struct phy *phy, int port)
511 if (!phy || !phy->ops->connect)
514 mutex_lock(&phy->mutex);
515 ret = phy->ops->connect(phy, port);
516 mutex_unlock(&phy->mutex);
520 EXPORT_SYMBOL_GPL(phy_notify_connect);
523 * phy_notify_disconnect() - phy disconnect notification
524 * @phy: the phy returned by phy_get()
525 * @port: the port index for disconnect
527 * If the phy needs to get connection status, the callback can be used.
529 * Returns: %0 if successful, a negative error code otherwise
531 int phy_notify_disconnect(struct phy *phy, int port)
535 if (!phy || !phy->ops->disconnect)
538 mutex_lock(&phy->mutex);
539 ret = phy->ops->disconnect(phy, port);
540 mutex_unlock(&phy->mutex);
544 EXPORT_SYMBOL_GPL(phy_notify_disconnect);
547 * phy_configure() - Changes the phy parameters
548 * @phy: the phy returned by phy_get()
549 * @opts: New configuration to apply
551 * Used to change the PHY parameters. phy_init() must have been called
552 * on the phy. The configuration will be applied on the current phy
553 * mode, that can be changed using phy_set_mode().
555 * Return: %0 if successful, a negative error code otherwise
557 int phy_configure(struct phy *phy, union phy_configure_opts *opts)
564 if (!phy->ops->configure)
567 mutex_lock(&phy->mutex);
568 ret = phy->ops->configure(phy, opts);
569 mutex_unlock(&phy->mutex);
573 EXPORT_SYMBOL_GPL(phy_configure);
576 * phy_validate() - Checks the phy parameters
577 * @phy: the phy returned by phy_get()
578 * @mode: phy_mode the configuration is applicable to.
579 * @submode: PHY submode the configuration is applicable to.
580 * @opts: Configuration to check
582 * Used to check that the current set of parameters can be handled by
583 * the phy. Implementations are free to tune the parameters passed as
584 * arguments if needed by some implementation detail or
585 * constraints. It will not change any actual configuration of the
586 * PHY, so calling it as many times as deemed fit will have no side
589 * Return: %0 if successful, a negative error code otherwise
591 int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
592 union phy_configure_opts *opts)
599 if (!phy->ops->validate)
602 mutex_lock(&phy->mutex);
603 ret = phy->ops->validate(phy, mode, submode, opts);
604 mutex_unlock(&phy->mutex);
608 EXPORT_SYMBOL_GPL(phy_validate);
611 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
612 * @np: device_node for which to get the phy
613 * @index: the index of the phy
615 * Returns the phy associated with the given phandle value,
616 * after getting a refcount to it or -ENODEV if there is no such phy or
617 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
618 * not yet loaded. This function uses of_xlate call back function provided
619 * while registering the phy_provider to find the phy instance.
621 static struct phy *_of_phy_get(struct device_node *np, int index)
624 struct phy_provider *phy_provider;
625 struct phy *phy = NULL;
626 struct of_phandle_args args;
628 ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
631 return ERR_PTR(-ENODEV);
633 /* This phy type handled by the usb-phy subsystem for now */
634 if (of_device_is_compatible(args.np, "usb-nop-xceiv")) {
635 phy = ERR_PTR(-ENODEV);
639 mutex_lock(&phy_provider_mutex);
640 phy_provider = of_phy_provider_lookup(args.np);
641 if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
642 phy = ERR_PTR(-EPROBE_DEFER);
646 if (!of_device_is_available(args.np)) {
647 dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
648 phy = ERR_PTR(-ENODEV);
652 phy = phy_provider->of_xlate(phy_provider->dev, &args);
655 module_put(phy_provider->owner);
658 mutex_unlock(&phy_provider_mutex);
660 of_node_put(args.np);
666 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
667 * @np: device_node for which to get the phy
668 * @con_id: name of the phy from device's point of view
670 * Returns the phy driver, after getting a refcount to it; or
671 * -ENODEV if there is no such phy. The caller is responsible for
672 * calling of_phy_put() to release that count.
674 struct phy *of_phy_get(struct device_node *np, const char *con_id)
676 struct phy *phy = NULL;
680 index = of_property_match_string(np, "phy-names", con_id);
682 phy = _of_phy_get(np, index);
686 if (!try_module_get(phy->ops->owner))
687 return ERR_PTR(-EPROBE_DEFER);
689 get_device(&phy->dev);
693 EXPORT_SYMBOL_GPL(of_phy_get);
696 * of_phy_put() - release the PHY
697 * @phy: the phy returned by of_phy_get()
699 * Releases a refcount the caller received from of_phy_get().
701 void of_phy_put(struct phy *phy)
703 if (!phy || IS_ERR(phy))
706 mutex_lock(&phy->mutex);
707 if (phy->ops->release)
708 phy->ops->release(phy);
709 mutex_unlock(&phy->mutex);
711 module_put(phy->ops->owner);
712 put_device(&phy->dev);
714 EXPORT_SYMBOL_GPL(of_phy_put);
717 * phy_put() - release the PHY
718 * @dev: device that wants to release this phy
719 * @phy: the phy returned by phy_get()
721 * Releases a refcount the caller received from phy_get().
723 void phy_put(struct device *dev, struct phy *phy)
725 device_link_remove(dev, &phy->dev);
728 EXPORT_SYMBOL_GPL(phy_put);
731 * devm_phy_put() - release the PHY
732 * @dev: device that wants to release this phy
733 * @phy: the phy returned by devm_phy_get()
735 * destroys the devres associated with this phy and invokes phy_put
736 * to release the phy.
738 void devm_phy_put(struct device *dev, struct phy *phy)
745 r = devres_release(dev, devm_phy_release, devm_phy_match, phy);
746 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
748 EXPORT_SYMBOL_GPL(devm_phy_put);
751 * of_phy_simple_xlate() - returns the phy instance from phy provider
752 * @dev: the PHY provider device
753 * @args: of_phandle_args (not used here)
755 * Intended to be used by phy provider for the common case where #phy-cells is
756 * 0. For other cases where #phy-cells is greater than '0', the phy provider
757 * should provide a custom of_xlate function that reads the *args* and returns
758 * the appropriate phy.
760 struct phy *of_phy_simple_xlate(struct device *dev,
761 const struct of_phandle_args *args)
764 struct class_dev_iter iter;
766 class_dev_iter_init(&iter, &phy_class, NULL, NULL);
767 while ((dev = class_dev_iter_next(&iter))) {
769 if (args->np != phy->dev.of_node)
772 class_dev_iter_exit(&iter);
776 class_dev_iter_exit(&iter);
777 return ERR_PTR(-ENODEV);
779 EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
782 * phy_get() - lookup and obtain a reference to a phy.
783 * @dev: device that requests this phy
784 * @string: the phy name as given in the dt data or the name of the controller
785 * port for non-dt case
787 * Returns the phy driver, after getting a refcount to it; or
788 * -ENODEV if there is no such phy. The caller is responsible for
789 * calling phy_put() to release that count.
791 struct phy *phy_get(struct device *dev, const char *string)
795 struct device_link *link;
799 index = of_property_match_string(dev->of_node, "phy-names",
803 phy = _of_phy_get(dev->of_node, index);
805 if (string == NULL) {
806 dev_WARN(dev, "missing string\n");
807 return ERR_PTR(-EINVAL);
809 phy = phy_find(dev, string);
814 if (!try_module_get(phy->ops->owner))
815 return ERR_PTR(-EPROBE_DEFER);
817 get_device(&phy->dev);
819 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
821 dev_dbg(dev, "failed to create device link to %s\n",
822 dev_name(phy->dev.parent));
826 EXPORT_SYMBOL_GPL(phy_get);
829 * devm_phy_get() - lookup and obtain a reference to a phy.
830 * @dev: device that requests this phy
831 * @string: the phy name as given in the dt data or phy device name
834 * Gets the phy using phy_get(), and associates a device with it using
835 * devres. On driver detach, release function is invoked on the devres data,
836 * then, devres data is freed.
838 struct phy *devm_phy_get(struct device *dev, const char *string)
840 struct phy **ptr, *phy;
842 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
844 return ERR_PTR(-ENOMEM);
846 phy = phy_get(dev, string);
849 devres_add(dev, ptr);
856 EXPORT_SYMBOL_GPL(devm_phy_get);
859 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
860 * @dev: device that requests this phy
861 * @string: the phy name as given in the dt data or phy device name
864 * Gets the phy using phy_get(), and associates a device with it using
865 * devres. On driver detach, release function is invoked on the devres
866 * data, then, devres data is freed. This differs to devm_phy_get() in
867 * that if the phy does not exist, it is not considered an error and
868 * -ENODEV will not be returned. Instead the NULL phy is returned,
869 * which can be passed to all other phy consumer calls.
871 struct phy *devm_phy_optional_get(struct device *dev, const char *string)
873 struct phy *phy = devm_phy_get(dev, string);
875 if (PTR_ERR(phy) == -ENODEV)
880 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
883 * devm_of_phy_get() - lookup and obtain a reference to a phy.
884 * @dev: device that requests this phy
885 * @np: node containing the phy
886 * @con_id: name of the phy from device's point of view
888 * Gets the phy using of_phy_get(), and associates a device with it using
889 * devres. On driver detach, release function is invoked on the devres data,
890 * then, devres data is freed.
892 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
895 struct phy **ptr, *phy;
896 struct device_link *link;
898 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
900 return ERR_PTR(-ENOMEM);
902 phy = of_phy_get(np, con_id);
905 devres_add(dev, ptr);
911 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
913 dev_dbg(dev, "failed to create device link to %s\n",
914 dev_name(phy->dev.parent));
918 EXPORT_SYMBOL_GPL(devm_of_phy_get);
921 * devm_of_phy_optional_get() - lookup and obtain a reference to an optional
923 * @dev: device that requests this phy
924 * @np: node containing the phy
925 * @con_id: name of the phy from device's point of view
927 * Gets the phy using of_phy_get(), and associates a device with it using
928 * devres. On driver detach, release function is invoked on the devres data,
929 * then, devres data is freed. This differs to devm_of_phy_get() in
930 * that if the phy does not exist, it is not considered an error and
931 * -ENODEV will not be returned. Instead the NULL phy is returned,
932 * which can be passed to all other phy consumer calls.
934 struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np,
937 struct phy *phy = devm_of_phy_get(dev, np, con_id);
939 if (PTR_ERR(phy) == -ENODEV)
943 dev_err_probe(dev, PTR_ERR(phy), "failed to get PHY %pOF:%s",
948 EXPORT_SYMBOL_GPL(devm_of_phy_optional_get);
951 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
952 * @dev: device that requests this phy
953 * @np: node containing the phy
954 * @index: index of the phy
956 * Gets the phy using _of_phy_get(), then gets a refcount to it,
957 * and associates a device with it using devres. On driver detach,
958 * release function is invoked on the devres data,
959 * then, devres data is freed.
962 struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
965 struct phy **ptr, *phy;
966 struct device_link *link;
968 ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
970 return ERR_PTR(-ENOMEM);
972 phy = _of_phy_get(np, index);
978 if (!try_module_get(phy->ops->owner)) {
980 return ERR_PTR(-EPROBE_DEFER);
983 get_device(&phy->dev);
986 devres_add(dev, ptr);
988 link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
990 dev_dbg(dev, "failed to create device link to %s\n",
991 dev_name(phy->dev.parent));
995 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
998 * phy_create() - create a new phy
999 * @dev: device that is creating the new phy
1000 * @node: device node of the phy
1001 * @ops: function pointers for performing phy operations
1003 * Called to create a phy using phy framework.
1005 struct phy *phy_create(struct device *dev, struct device_node *node,
1006 const struct phy_ops *ops)
1013 return ERR_PTR(-EINVAL);
1015 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
1017 return ERR_PTR(-ENOMEM);
1019 id = ida_alloc(&phy_ida, GFP_KERNEL);
1021 dev_err(dev, "unable to get id\n");
1026 device_initialize(&phy->dev);
1027 mutex_init(&phy->mutex);
1029 phy->dev.class = &phy_class;
1030 phy->dev.parent = dev;
1031 phy->dev.of_node = node ?: dev->of_node;
1035 ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
1040 phy->pwr = regulator_get_optional(&phy->dev, "phy");
1041 if (IS_ERR(phy->pwr)) {
1042 ret = PTR_ERR(phy->pwr);
1043 if (ret == -EPROBE_DEFER)
1049 ret = device_add(&phy->dev);
1053 if (pm_runtime_enabled(dev)) {
1054 pm_runtime_enable(&phy->dev);
1055 pm_runtime_no_callbacks(&phy->dev);
1058 phy->debugfs = debugfs_create_dir(dev_name(&phy->dev), phy_debugfs_root);
1063 put_device(&phy->dev); /* calls phy_release() which frees resources */
1064 return ERR_PTR(ret);
1068 return ERR_PTR(ret);
1070 EXPORT_SYMBOL_GPL(phy_create);
1073 * devm_phy_create() - create a new phy
1074 * @dev: device that is creating the new phy
1075 * @node: device node of the phy
1076 * @ops: function pointers for performing phy operations
1078 * Creates a new PHY device adding it to the PHY class.
1079 * While at that, it also associates the device with the phy using devres.
1080 * On driver detach, release function is invoked on the devres data,
1081 * then, devres data is freed.
1083 struct phy *devm_phy_create(struct device *dev, struct device_node *node,
1084 const struct phy_ops *ops)
1086 struct phy **ptr, *phy;
1088 ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
1090 return ERR_PTR(-ENOMEM);
1092 phy = phy_create(dev, node, ops);
1095 devres_add(dev, ptr);
1102 EXPORT_SYMBOL_GPL(devm_phy_create);
1105 * phy_destroy() - destroy the phy
1106 * @phy: the phy to be destroyed
1108 * Called to destroy the phy.
1110 void phy_destroy(struct phy *phy)
1112 pm_runtime_disable(&phy->dev);
1113 device_unregister(&phy->dev);
1115 EXPORT_SYMBOL_GPL(phy_destroy);
1118 * devm_phy_destroy() - destroy the PHY
1119 * @dev: device that wants to release this phy
1120 * @phy: the phy returned by devm_phy_get()
1122 * destroys the devres associated with this phy and invokes phy_destroy
1123 * to destroy the phy.
1125 void devm_phy_destroy(struct device *dev, struct phy *phy)
1129 r = devres_release(dev, devm_phy_consume, devm_phy_match, phy);
1130 dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
1132 EXPORT_SYMBOL_GPL(devm_phy_destroy);
1135 * __of_phy_provider_register() - create/register phy provider with the framework
1136 * @dev: struct device of the phy provider
1137 * @children: device node containing children (if different from dev->of_node)
1138 * @owner: the module owner containing of_xlate
1139 * @of_xlate: function pointer to obtain phy instance from phy provider
1141 * Creates struct phy_provider from dev and of_xlate function pointer.
1142 * This is used in the case of dt boot for finding the phy instance from
1145 * If the PHY provider doesn't nest children directly but uses a separate
1146 * child node to contain the individual children, the @children parameter
1147 * can be used to override the default. If NULL, the default (dev->of_node)
1148 * will be used. If non-NULL, the device node must be a child (or further
1149 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
1150 * error code is returned.
1152 struct phy_provider *__of_phy_provider_register(struct device *dev,
1153 struct device_node *children, struct module *owner,
1154 struct phy * (*of_xlate)(struct device *dev,
1155 const struct of_phandle_args *args))
1157 struct phy_provider *phy_provider;
1160 * If specified, the device node containing the children must itself
1161 * be the provider's device node or a child (or further descendant)
1165 struct device_node *parent = of_node_get(children), *next;
1168 if (parent == dev->of_node)
1171 next = of_get_parent(parent);
1172 of_node_put(parent);
1177 return ERR_PTR(-EINVAL);
1179 of_node_put(parent);
1181 children = dev->of_node;
1184 phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
1186 return ERR_PTR(-ENOMEM);
1188 phy_provider->dev = dev;
1189 phy_provider->children = of_node_get(children);
1190 phy_provider->owner = owner;
1191 phy_provider->of_xlate = of_xlate;
1193 mutex_lock(&phy_provider_mutex);
1194 list_add_tail(&phy_provider->list, &phy_provider_list);
1195 mutex_unlock(&phy_provider_mutex);
1197 return phy_provider;
1199 EXPORT_SYMBOL_GPL(__of_phy_provider_register);
1202 * __devm_of_phy_provider_register() - create/register phy provider with the
1204 * @dev: struct device of the phy provider
1205 * @children: device node containing children (if different from dev->of_node)
1206 * @owner: the module owner containing of_xlate
1207 * @of_xlate: function pointer to obtain phy instance from phy provider
1209 * Creates struct phy_provider from dev and of_xlate function pointer.
1210 * This is used in the case of dt boot for finding the phy instance from
1211 * phy provider. While at that, it also associates the device with the
1212 * phy provider using devres. On driver detach, release function is invoked
1213 * on the devres data, then, devres data is freed.
1215 struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
1216 struct device_node *children, struct module *owner,
1217 struct phy * (*of_xlate)(struct device *dev,
1218 const struct of_phandle_args *args))
1220 struct phy_provider **ptr, *phy_provider;
1222 ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
1224 return ERR_PTR(-ENOMEM);
1226 phy_provider = __of_phy_provider_register(dev, children, owner,
1228 if (!IS_ERR(phy_provider)) {
1229 *ptr = phy_provider;
1230 devres_add(dev, ptr);
1235 return phy_provider;
1237 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
1240 * of_phy_provider_unregister() - unregister phy provider from the framework
1241 * @phy_provider: phy provider returned by of_phy_provider_register()
1243 * Removes the phy_provider created using of_phy_provider_register().
1245 void of_phy_provider_unregister(struct phy_provider *phy_provider)
1247 if (IS_ERR(phy_provider))
1250 mutex_lock(&phy_provider_mutex);
1251 list_del(&phy_provider->list);
1252 of_node_put(phy_provider->children);
1253 kfree(phy_provider);
1254 mutex_unlock(&phy_provider_mutex);
1256 EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
1259 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1260 * @dev: struct device of the phy provider
1261 * @phy_provider: phy provider returned by of_phy_provider_register()
1263 * destroys the devres associated with this phy provider and invokes
1264 * of_phy_provider_unregister to unregister the phy provider.
1266 void devm_of_phy_provider_unregister(struct device *dev,
1267 struct phy_provider *phy_provider)
1271 r = devres_release(dev, devm_phy_provider_release, devm_phy_match,
1273 dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
1275 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
1278 * phy_release() - release the phy
1279 * @dev: the dev member within phy
1281 * When the last reference to the device is removed, it is called
1282 * from the embedded kobject as release method.
1284 static void phy_release(struct device *dev)
1289 dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
1290 debugfs_remove_recursive(phy->debugfs);
1291 regulator_put(phy->pwr);
1292 ida_free(&phy_ida, phy->id);
1296 static int __init phy_core_init(void)
1300 err = class_register(&phy_class);
1302 pr_err("failed to register phy class");
1306 phy_debugfs_root = debugfs_create_dir("phy", NULL);
1310 device_initcall(phy_core_init);
1312 static void __exit phy_core_exit(void)
1314 debugfs_remove_recursive(phy_debugfs_root);
1315 class_unregister(&phy_class);
1317 module_exit(phy_core_exit);