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
7 * Author: Kishon Vijay Abraham I <kishon@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 struct class *phy_class
;
24 static struct dentry
*phy_debugfs_root
;
25 static DEFINE_MUTEX(phy_provider_mutex
);
26 static LIST_HEAD(phy_provider_list
);
27 static LIST_HEAD(phys
);
28 static DEFINE_IDA(phy_ida
);
30 static void devm_phy_release(struct device
*dev
, void *res
)
32 struct phy
*phy
= *(struct phy
**)res
;
37 static void devm_phy_provider_release(struct device
*dev
, void *res
)
39 struct phy_provider
*phy_provider
= *(struct phy_provider
**)res
;
41 of_phy_provider_unregister(phy_provider
);
44 static void devm_phy_consume(struct device
*dev
, void *res
)
46 struct phy
*phy
= *(struct phy
**)res
;
51 static int devm_phy_match(struct device
*dev
, void *res
, void *match_data
)
53 struct phy
**phy
= res
;
55 return *phy
== match_data
;
59 * phy_create_lookup() - allocate and register PHY/device association
60 * @phy: the phy of the association
61 * @con_id: connection ID string on device
62 * @dev_id: the device of the association
64 * Creates and registers phy_lookup entry.
66 int phy_create_lookup(struct phy
*phy
, const char *con_id
, const char *dev_id
)
68 struct phy_lookup
*pl
;
70 if (!phy
|| !dev_id
|| !con_id
)
73 pl
= kzalloc(sizeof(*pl
), GFP_KERNEL
);
81 mutex_lock(&phy_provider_mutex
);
82 list_add_tail(&pl
->node
, &phys
);
83 mutex_unlock(&phy_provider_mutex
);
87 EXPORT_SYMBOL_GPL(phy_create_lookup
);
90 * phy_remove_lookup() - find and remove PHY/device association
91 * @phy: the phy of the association
92 * @con_id: connection ID string on device
93 * @dev_id: the device of the association
95 * Finds and unregisters phy_lookup entry that was created with
96 * phy_create_lookup().
98 void phy_remove_lookup(struct phy
*phy
, const char *con_id
, const char *dev_id
)
100 struct phy_lookup
*pl
;
102 if (!phy
|| !dev_id
|| !con_id
)
105 mutex_lock(&phy_provider_mutex
);
106 list_for_each_entry(pl
, &phys
, node
)
107 if (pl
->phy
== phy
&& !strcmp(pl
->dev_id
, dev_id
) &&
108 !strcmp(pl
->con_id
, con_id
)) {
113 mutex_unlock(&phy_provider_mutex
);
115 EXPORT_SYMBOL_GPL(phy_remove_lookup
);
117 static struct phy
*phy_find(struct device
*dev
, const char *con_id
)
119 const char *dev_id
= dev_name(dev
);
120 struct phy_lookup
*p
, *pl
= NULL
;
122 mutex_lock(&phy_provider_mutex
);
123 list_for_each_entry(p
, &phys
, node
)
124 if (!strcmp(p
->dev_id
, dev_id
) && !strcmp(p
->con_id
, con_id
)) {
128 mutex_unlock(&phy_provider_mutex
);
130 return pl
? pl
->phy
: ERR_PTR(-ENODEV
);
133 static struct phy_provider
*of_phy_provider_lookup(struct device_node
*node
)
135 struct phy_provider
*phy_provider
;
136 struct device_node
*child
;
138 list_for_each_entry(phy_provider
, &phy_provider_list
, list
) {
139 if (phy_provider
->dev
->of_node
== node
)
142 for_each_child_of_node(phy_provider
->children
, child
)
147 return ERR_PTR(-EPROBE_DEFER
);
150 int phy_pm_runtime_get(struct phy
*phy
)
157 if (!pm_runtime_enabled(&phy
->dev
))
160 ret
= pm_runtime_get(&phy
->dev
);
161 if (ret
< 0 && ret
!= -EINPROGRESS
)
162 pm_runtime_put_noidle(&phy
->dev
);
166 EXPORT_SYMBOL_GPL(phy_pm_runtime_get
);
168 int phy_pm_runtime_get_sync(struct phy
*phy
)
175 if (!pm_runtime_enabled(&phy
->dev
))
178 ret
= pm_runtime_get_sync(&phy
->dev
);
180 pm_runtime_put_sync(&phy
->dev
);
184 EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync
);
186 int phy_pm_runtime_put(struct phy
*phy
)
191 if (!pm_runtime_enabled(&phy
->dev
))
194 return pm_runtime_put(&phy
->dev
);
196 EXPORT_SYMBOL_GPL(phy_pm_runtime_put
);
198 int phy_pm_runtime_put_sync(struct phy
*phy
)
203 if (!pm_runtime_enabled(&phy
->dev
))
206 return pm_runtime_put_sync(&phy
->dev
);
208 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync
);
210 void phy_pm_runtime_allow(struct phy
*phy
)
215 if (!pm_runtime_enabled(&phy
->dev
))
218 pm_runtime_allow(&phy
->dev
);
220 EXPORT_SYMBOL_GPL(phy_pm_runtime_allow
);
222 void phy_pm_runtime_forbid(struct phy
*phy
)
227 if (!pm_runtime_enabled(&phy
->dev
))
230 pm_runtime_forbid(&phy
->dev
);
232 EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid
);
235 * phy_init - phy internal initialization before phy operation
236 * @phy: the phy returned by phy_get()
238 * Used to allow phy's driver to perform phy internal initialization,
239 * such as PLL block powering, clock initialization or anything that's
240 * is required by the phy to perform the start of operation.
241 * Must be called before phy_power_on().
243 * Return: %0 if successful, a negative error code otherwise
245 int phy_init(struct phy
*phy
)
252 ret
= phy_pm_runtime_get_sync(phy
);
253 if (ret
< 0 && ret
!= -ENOTSUPP
)
255 ret
= 0; /* Override possible ret == -ENOTSUPP */
257 mutex_lock(&phy
->mutex
);
258 if (phy
->power_count
> phy
->init_count
)
259 dev_warn(&phy
->dev
, "phy_power_on was called before phy_init\n");
261 if (phy
->init_count
== 0 && phy
->ops
->init
) {
262 ret
= phy
->ops
->init(phy
);
264 dev_err(&phy
->dev
, "phy init failed --> %d\n", ret
);
271 mutex_unlock(&phy
->mutex
);
272 phy_pm_runtime_put(phy
);
275 EXPORT_SYMBOL_GPL(phy_init
);
278 * phy_exit - Phy internal un-initialization
279 * @phy: the phy returned by phy_get()
281 * Must be called after phy_power_off().
283 * Return: %0 if successful, a negative error code otherwise
285 int phy_exit(struct phy
*phy
)
292 ret
= phy_pm_runtime_get_sync(phy
);
293 if (ret
< 0 && ret
!= -ENOTSUPP
)
295 ret
= 0; /* Override possible ret == -ENOTSUPP */
297 mutex_lock(&phy
->mutex
);
298 if (phy
->init_count
== 1 && phy
->ops
->exit
) {
299 ret
= phy
->ops
->exit(phy
);
301 dev_err(&phy
->dev
, "phy exit failed --> %d\n", ret
);
308 mutex_unlock(&phy
->mutex
);
309 phy_pm_runtime_put(phy
);
312 EXPORT_SYMBOL_GPL(phy_exit
);
315 * phy_power_on - Enable the phy and enter proper operation
316 * @phy: the phy returned by phy_get()
318 * Must be called after phy_init().
320 * Return: %0 if successful, a negative error code otherwise
322 int phy_power_on(struct phy
*phy
)
330 ret
= regulator_enable(phy
->pwr
);
335 ret
= phy_pm_runtime_get_sync(phy
);
336 if (ret
< 0 && ret
!= -ENOTSUPP
)
339 ret
= 0; /* Override possible ret == -ENOTSUPP */
341 mutex_lock(&phy
->mutex
);
342 if (phy
->power_count
== 0 && phy
->ops
->power_on
) {
343 ret
= phy
->ops
->power_on(phy
);
345 dev_err(&phy
->dev
, "phy poweron failed --> %d\n", ret
);
350 mutex_unlock(&phy
->mutex
);
354 mutex_unlock(&phy
->mutex
);
355 phy_pm_runtime_put_sync(phy
);
358 regulator_disable(phy
->pwr
);
362 EXPORT_SYMBOL_GPL(phy_power_on
);
365 * phy_power_off - Disable the phy.
366 * @phy: the phy returned by phy_get()
368 * Must be called before phy_exit().
370 * Return: %0 if successful, a negative error code otherwise
372 int phy_power_off(struct phy
*phy
)
379 mutex_lock(&phy
->mutex
);
380 if (phy
->power_count
== 1 && phy
->ops
->power_off
) {
381 ret
= phy
->ops
->power_off(phy
);
383 dev_err(&phy
->dev
, "phy poweroff failed --> %d\n", ret
);
384 mutex_unlock(&phy
->mutex
);
389 mutex_unlock(&phy
->mutex
);
390 phy_pm_runtime_put(phy
);
393 regulator_disable(phy
->pwr
);
397 EXPORT_SYMBOL_GPL(phy_power_off
);
399 int phy_set_mode_ext(struct phy
*phy
, enum phy_mode mode
, int submode
)
403 if (!phy
|| !phy
->ops
->set_mode
)
406 mutex_lock(&phy
->mutex
);
407 ret
= phy
->ops
->set_mode(phy
, mode
, submode
);
409 phy
->attrs
.mode
= mode
;
410 mutex_unlock(&phy
->mutex
);
414 EXPORT_SYMBOL_GPL(phy_set_mode_ext
);
416 int phy_set_media(struct phy
*phy
, enum phy_media media
)
420 if (!phy
|| !phy
->ops
->set_media
)
423 mutex_lock(&phy
->mutex
);
424 ret
= phy
->ops
->set_media(phy
, media
);
425 mutex_unlock(&phy
->mutex
);
429 EXPORT_SYMBOL_GPL(phy_set_media
);
431 int phy_set_speed(struct phy
*phy
, int speed
)
435 if (!phy
|| !phy
->ops
->set_speed
)
438 mutex_lock(&phy
->mutex
);
439 ret
= phy
->ops
->set_speed(phy
, speed
);
440 mutex_unlock(&phy
->mutex
);
444 EXPORT_SYMBOL_GPL(phy_set_speed
);
446 int phy_reset(struct phy
*phy
)
450 if (!phy
|| !phy
->ops
->reset
)
453 ret
= phy_pm_runtime_get_sync(phy
);
454 if (ret
< 0 && ret
!= -ENOTSUPP
)
457 mutex_lock(&phy
->mutex
);
458 ret
= phy
->ops
->reset(phy
);
459 mutex_unlock(&phy
->mutex
);
461 phy_pm_runtime_put(phy
);
465 EXPORT_SYMBOL_GPL(phy_reset
);
468 * phy_calibrate() - Tunes the phy hw parameters for current configuration
469 * @phy: the phy returned by phy_get()
471 * Used to calibrate phy hardware, typically by adjusting some parameters in
472 * runtime, which are otherwise lost after host controller reset and cannot
473 * be applied in phy_init() or phy_power_on().
475 * Return: %0 if successful, a negative error code otherwise
477 int phy_calibrate(struct phy
*phy
)
481 if (!phy
|| !phy
->ops
->calibrate
)
484 mutex_lock(&phy
->mutex
);
485 ret
= phy
->ops
->calibrate(phy
);
486 mutex_unlock(&phy
->mutex
);
490 EXPORT_SYMBOL_GPL(phy_calibrate
);
493 * phy_configure() - Changes the phy parameters
494 * @phy: the phy returned by phy_get()
495 * @opts: New configuration to apply
497 * Used to change the PHY parameters. phy_init() must have been called
498 * on the phy. The configuration will be applied on the current phy
499 * mode, that can be changed using phy_set_mode().
501 * Return: %0 if successful, a negative error code otherwise
503 int phy_configure(struct phy
*phy
, union phy_configure_opts
*opts
)
510 if (!phy
->ops
->configure
)
513 mutex_lock(&phy
->mutex
);
514 ret
= phy
->ops
->configure(phy
, opts
);
515 mutex_unlock(&phy
->mutex
);
519 EXPORT_SYMBOL_GPL(phy_configure
);
522 * phy_validate() - Checks the phy parameters
523 * @phy: the phy returned by phy_get()
524 * @mode: phy_mode the configuration is applicable to.
525 * @submode: PHY submode the configuration is applicable to.
526 * @opts: Configuration to check
528 * Used to check that the current set of parameters can be handled by
529 * the phy. Implementations are free to tune the parameters passed as
530 * arguments if needed by some implementation detail or
531 * constraints. It will not change any actual configuration of the
532 * PHY, so calling it as many times as deemed fit will have no side
535 * Return: %0 if successful, a negative error code otherwise
537 int phy_validate(struct phy
*phy
, enum phy_mode mode
, int submode
,
538 union phy_configure_opts
*opts
)
545 if (!phy
->ops
->validate
)
548 mutex_lock(&phy
->mutex
);
549 ret
= phy
->ops
->validate(phy
, mode
, submode
, opts
);
550 mutex_unlock(&phy
->mutex
);
554 EXPORT_SYMBOL_GPL(phy_validate
);
557 * _of_phy_get() - lookup and obtain a reference to a phy by phandle
558 * @np: device_node for which to get the phy
559 * @index: the index of the phy
561 * Returns the phy associated with the given phandle value,
562 * after getting a refcount to it or -ENODEV if there is no such phy or
563 * -EPROBE_DEFER if there is a phandle to the phy, but the device is
564 * not yet loaded. This function uses of_xlate call back function provided
565 * while registering the phy_provider to find the phy instance.
567 static struct phy
*_of_phy_get(struct device_node
*np
, int index
)
570 struct phy_provider
*phy_provider
;
571 struct phy
*phy
= NULL
;
572 struct of_phandle_args args
;
574 ret
= of_parse_phandle_with_args(np
, "phys", "#phy-cells",
577 return ERR_PTR(-ENODEV
);
579 /* This phy type handled by the usb-phy subsystem for now */
580 if (of_device_is_compatible(args
.np
, "usb-nop-xceiv"))
581 return ERR_PTR(-ENODEV
);
583 mutex_lock(&phy_provider_mutex
);
584 phy_provider
= of_phy_provider_lookup(args
.np
);
585 if (IS_ERR(phy_provider
) || !try_module_get(phy_provider
->owner
)) {
586 phy
= ERR_PTR(-EPROBE_DEFER
);
590 if (!of_device_is_available(args
.np
)) {
591 dev_warn(phy_provider
->dev
, "Requested PHY is disabled\n");
592 phy
= ERR_PTR(-ENODEV
);
596 phy
= phy_provider
->of_xlate(phy_provider
->dev
, &args
);
599 module_put(phy_provider
->owner
);
602 mutex_unlock(&phy_provider_mutex
);
603 of_node_put(args
.np
);
609 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
610 * @np: device_node for which to get the phy
611 * @con_id: name of the phy from device's point of view
613 * Returns the phy driver, after getting a refcount to it; or
614 * -ENODEV if there is no such phy. The caller is responsible for
615 * calling phy_put() to release that count.
617 struct phy
*of_phy_get(struct device_node
*np
, const char *con_id
)
619 struct phy
*phy
= NULL
;
623 index
= of_property_match_string(np
, "phy-names", con_id
);
625 phy
= _of_phy_get(np
, index
);
629 if (!try_module_get(phy
->ops
->owner
))
630 return ERR_PTR(-EPROBE_DEFER
);
632 get_device(&phy
->dev
);
636 EXPORT_SYMBOL_GPL(of_phy_get
);
639 * of_phy_put() - release the PHY
640 * @phy: the phy returned by of_phy_get()
642 * Releases a refcount the caller received from of_phy_get().
644 void of_phy_put(struct phy
*phy
)
646 if (!phy
|| IS_ERR(phy
))
649 mutex_lock(&phy
->mutex
);
650 if (phy
->ops
->release
)
651 phy
->ops
->release(phy
);
652 mutex_unlock(&phy
->mutex
);
654 module_put(phy
->ops
->owner
);
655 put_device(&phy
->dev
);
657 EXPORT_SYMBOL_GPL(of_phy_put
);
660 * phy_put() - release the PHY
661 * @dev: device that wants to release this phy
662 * @phy: the phy returned by phy_get()
664 * Releases a refcount the caller received from phy_get().
666 void phy_put(struct device
*dev
, struct phy
*phy
)
668 device_link_remove(dev
, &phy
->dev
);
671 EXPORT_SYMBOL_GPL(phy_put
);
674 * devm_phy_put() - release the PHY
675 * @dev: device that wants to release this phy
676 * @phy: the phy returned by devm_phy_get()
678 * destroys the devres associated with this phy and invokes phy_put
679 * to release the phy.
681 void devm_phy_put(struct device
*dev
, struct phy
*phy
)
688 r
= devres_destroy(dev
, devm_phy_release
, devm_phy_match
, phy
);
689 dev_WARN_ONCE(dev
, r
, "couldn't find PHY resource\n");
691 EXPORT_SYMBOL_GPL(devm_phy_put
);
694 * of_phy_simple_xlate() - returns the phy instance from phy provider
695 * @dev: the PHY provider device
696 * @args: of_phandle_args (not used here)
698 * Intended to be used by phy provider for the common case where #phy-cells is
699 * 0. For other cases where #phy-cells is greater than '0', the phy provider
700 * should provide a custom of_xlate function that reads the *args* and returns
701 * the appropriate phy.
703 struct phy
*of_phy_simple_xlate(struct device
*dev
,
704 const struct of_phandle_args
*args
)
707 struct class_dev_iter iter
;
709 class_dev_iter_init(&iter
, phy_class
, NULL
, NULL
);
710 while ((dev
= class_dev_iter_next(&iter
))) {
712 if (args
->np
!= phy
->dev
.of_node
)
715 class_dev_iter_exit(&iter
);
719 class_dev_iter_exit(&iter
);
720 return ERR_PTR(-ENODEV
);
722 EXPORT_SYMBOL_GPL(of_phy_simple_xlate
);
725 * phy_get() - lookup and obtain a reference to a phy.
726 * @dev: device that requests this phy
727 * @string: the phy name as given in the dt data or the name of the controller
728 * port for non-dt case
730 * Returns the phy driver, after getting a refcount to it; or
731 * -ENODEV if there is no such phy. The caller is responsible for
732 * calling phy_put() to release that count.
734 struct phy
*phy_get(struct device
*dev
, const char *string
)
738 struct device_link
*link
;
742 index
= of_property_match_string(dev
->of_node
, "phy-names",
746 phy
= _of_phy_get(dev
->of_node
, index
);
748 if (string
== NULL
) {
749 dev_WARN(dev
, "missing string\n");
750 return ERR_PTR(-EINVAL
);
752 phy
= phy_find(dev
, string
);
757 if (!try_module_get(phy
->ops
->owner
))
758 return ERR_PTR(-EPROBE_DEFER
);
760 get_device(&phy
->dev
);
762 link
= device_link_add(dev
, &phy
->dev
, DL_FLAG_STATELESS
);
764 dev_dbg(dev
, "failed to create device link to %s\n",
765 dev_name(phy
->dev
.parent
));
769 EXPORT_SYMBOL_GPL(phy_get
);
772 * devm_phy_get() - lookup and obtain a reference to a phy.
773 * @dev: device that requests this phy
774 * @string: the phy name as given in the dt data or phy device name
777 * Gets the phy using phy_get(), and associates a device with it using
778 * devres. On driver detach, release function is invoked on the devres data,
779 * then, devres data is freed.
781 struct phy
*devm_phy_get(struct device
*dev
, const char *string
)
783 struct phy
**ptr
, *phy
;
785 ptr
= devres_alloc(devm_phy_release
, sizeof(*ptr
), GFP_KERNEL
);
787 return ERR_PTR(-ENOMEM
);
789 phy
= phy_get(dev
, string
);
792 devres_add(dev
, ptr
);
799 EXPORT_SYMBOL_GPL(devm_phy_get
);
802 * devm_phy_optional_get() - lookup and obtain a reference to an optional phy.
803 * @dev: device that requests this phy
804 * @string: the phy name as given in the dt data or phy device name
807 * Gets the phy using phy_get(), and associates a device with it using
808 * devres. On driver detach, release function is invoked on the devres
809 * data, then, devres data is freed. This differs to devm_phy_get() in
810 * that if the phy does not exist, it is not considered an error and
811 * -ENODEV will not be returned. Instead the NULL phy is returned,
812 * which can be passed to all other phy consumer calls.
814 struct phy
*devm_phy_optional_get(struct device
*dev
, const char *string
)
816 struct phy
*phy
= devm_phy_get(dev
, string
);
818 if (PTR_ERR(phy
) == -ENODEV
)
823 EXPORT_SYMBOL_GPL(devm_phy_optional_get
);
826 * devm_of_phy_get() - lookup and obtain a reference to a phy.
827 * @dev: device that requests this phy
828 * @np: node containing the phy
829 * @con_id: name of the phy from device's point of view
831 * Gets the phy using of_phy_get(), and associates a device with it using
832 * devres. On driver detach, release function is invoked on the devres data,
833 * then, devres data is freed.
835 struct phy
*devm_of_phy_get(struct device
*dev
, struct device_node
*np
,
838 struct phy
**ptr
, *phy
;
839 struct device_link
*link
;
841 ptr
= devres_alloc(devm_phy_release
, sizeof(*ptr
), GFP_KERNEL
);
843 return ERR_PTR(-ENOMEM
);
845 phy
= of_phy_get(np
, con_id
);
848 devres_add(dev
, ptr
);
854 link
= device_link_add(dev
, &phy
->dev
, DL_FLAG_STATELESS
);
856 dev_dbg(dev
, "failed to create device link to %s\n",
857 dev_name(phy
->dev
.parent
));
861 EXPORT_SYMBOL_GPL(devm_of_phy_get
);
864 * devm_of_phy_optional_get() - lookup and obtain a reference to an optional
866 * @dev: device that requests this phy
867 * @np: node containing the phy
868 * @con_id: name of the phy from device's point of view
870 * Gets the phy using of_phy_get(), and associates a device with it using
871 * devres. On driver detach, release function is invoked on the devres data,
872 * then, devres data is freed. This differs to devm_of_phy_get() in
873 * that if the phy does not exist, it is not considered an error and
874 * -ENODEV will not be returned. Instead the NULL phy is returned,
875 * which can be passed to all other phy consumer calls.
877 struct phy
*devm_of_phy_optional_get(struct device
*dev
, struct device_node
*np
,
880 struct phy
*phy
= devm_of_phy_get(dev
, np
, con_id
);
882 if (PTR_ERR(phy
) == -ENODEV
)
886 dev_err_probe(dev
, PTR_ERR(phy
), "failed to get PHY %pOF:%s",
891 EXPORT_SYMBOL_GPL(devm_of_phy_optional_get
);
894 * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
895 * @dev: device that requests this phy
896 * @np: node containing the phy
897 * @index: index of the phy
899 * Gets the phy using _of_phy_get(), then gets a refcount to it,
900 * and associates a device with it using devres. On driver detach,
901 * release function is invoked on the devres data,
902 * then, devres data is freed.
905 struct phy
*devm_of_phy_get_by_index(struct device
*dev
, struct device_node
*np
,
908 struct phy
**ptr
, *phy
;
909 struct device_link
*link
;
911 ptr
= devres_alloc(devm_phy_release
, sizeof(*ptr
), GFP_KERNEL
);
913 return ERR_PTR(-ENOMEM
);
915 phy
= _of_phy_get(np
, index
);
921 if (!try_module_get(phy
->ops
->owner
)) {
923 return ERR_PTR(-EPROBE_DEFER
);
926 get_device(&phy
->dev
);
929 devres_add(dev
, ptr
);
931 link
= device_link_add(dev
, &phy
->dev
, DL_FLAG_STATELESS
);
933 dev_dbg(dev
, "failed to create device link to %s\n",
934 dev_name(phy
->dev
.parent
));
938 EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index
);
941 * phy_create() - create a new phy
942 * @dev: device that is creating the new phy
943 * @node: device node of the phy
944 * @ops: function pointers for performing phy operations
946 * Called to create a phy using phy framework.
948 struct phy
*phy_create(struct device
*dev
, struct device_node
*node
,
949 const struct phy_ops
*ops
)
956 return ERR_PTR(-EINVAL
);
958 phy
= kzalloc(sizeof(*phy
), GFP_KERNEL
);
960 return ERR_PTR(-ENOMEM
);
962 id
= ida_alloc(&phy_ida
, GFP_KERNEL
);
964 dev_err(dev
, "unable to get id\n");
969 device_initialize(&phy
->dev
);
970 mutex_init(&phy
->mutex
);
972 phy
->dev
.class = phy_class
;
973 phy
->dev
.parent
= dev
;
974 phy
->dev
.of_node
= node
?: dev
->of_node
;
978 ret
= dev_set_name(&phy
->dev
, "phy-%s.%d", dev_name(dev
), id
);
983 phy
->pwr
= regulator_get_optional(&phy
->dev
, "phy");
984 if (IS_ERR(phy
->pwr
)) {
985 ret
= PTR_ERR(phy
->pwr
);
986 if (ret
== -EPROBE_DEFER
)
992 ret
= device_add(&phy
->dev
);
996 if (pm_runtime_enabled(dev
)) {
997 pm_runtime_enable(&phy
->dev
);
998 pm_runtime_no_callbacks(&phy
->dev
);
1001 phy
->debugfs
= debugfs_create_dir(dev_name(&phy
->dev
), phy_debugfs_root
);
1006 put_device(&phy
->dev
); /* calls phy_release() which frees resources */
1007 return ERR_PTR(ret
);
1011 return ERR_PTR(ret
);
1013 EXPORT_SYMBOL_GPL(phy_create
);
1016 * devm_phy_create() - create a new phy
1017 * @dev: device that is creating the new phy
1018 * @node: device node of the phy
1019 * @ops: function pointers for performing phy operations
1021 * Creates a new PHY device adding it to the PHY class.
1022 * While at that, it also associates the device with the phy using devres.
1023 * On driver detach, release function is invoked on the devres data,
1024 * then, devres data is freed.
1026 struct phy
*devm_phy_create(struct device
*dev
, struct device_node
*node
,
1027 const struct phy_ops
*ops
)
1029 struct phy
**ptr
, *phy
;
1031 ptr
= devres_alloc(devm_phy_consume
, sizeof(*ptr
), GFP_KERNEL
);
1033 return ERR_PTR(-ENOMEM
);
1035 phy
= phy_create(dev
, node
, ops
);
1038 devres_add(dev
, ptr
);
1045 EXPORT_SYMBOL_GPL(devm_phy_create
);
1048 * phy_destroy() - destroy the phy
1049 * @phy: the phy to be destroyed
1051 * Called to destroy the phy.
1053 void phy_destroy(struct phy
*phy
)
1055 pm_runtime_disable(&phy
->dev
);
1056 device_unregister(&phy
->dev
);
1058 EXPORT_SYMBOL_GPL(phy_destroy
);
1061 * devm_phy_destroy() - destroy the PHY
1062 * @dev: device that wants to release this phy
1063 * @phy: the phy returned by devm_phy_get()
1065 * destroys the devres associated with this phy and invokes phy_destroy
1066 * to destroy the phy.
1068 void devm_phy_destroy(struct device
*dev
, struct phy
*phy
)
1072 r
= devres_destroy(dev
, devm_phy_consume
, devm_phy_match
, phy
);
1073 dev_WARN_ONCE(dev
, r
, "couldn't find PHY resource\n");
1075 EXPORT_SYMBOL_GPL(devm_phy_destroy
);
1078 * __of_phy_provider_register() - create/register phy provider with the framework
1079 * @dev: struct device of the phy provider
1080 * @children: device node containing children (if different from dev->of_node)
1081 * @owner: the module owner containing of_xlate
1082 * @of_xlate: function pointer to obtain phy instance from phy provider
1084 * Creates struct phy_provider from dev and of_xlate function pointer.
1085 * This is used in the case of dt boot for finding the phy instance from
1088 * If the PHY provider doesn't nest children directly but uses a separate
1089 * child node to contain the individual children, the @children parameter
1090 * can be used to override the default. If NULL, the default (dev->of_node)
1091 * will be used. If non-NULL, the device node must be a child (or further
1092 * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL
1093 * error code is returned.
1095 struct phy_provider
*__of_phy_provider_register(struct device
*dev
,
1096 struct device_node
*children
, struct module
*owner
,
1097 struct phy
* (*of_xlate
)(struct device
*dev
,
1098 const struct of_phandle_args
*args
))
1100 struct phy_provider
*phy_provider
;
1103 * If specified, the device node containing the children must itself
1104 * be the provider's device node or a child (or further descendant)
1108 struct device_node
*parent
= of_node_get(children
), *next
;
1111 if (parent
== dev
->of_node
)
1114 next
= of_get_parent(parent
);
1115 of_node_put(parent
);
1120 return ERR_PTR(-EINVAL
);
1122 of_node_put(parent
);
1124 children
= dev
->of_node
;
1127 phy_provider
= kzalloc(sizeof(*phy_provider
), GFP_KERNEL
);
1129 return ERR_PTR(-ENOMEM
);
1131 phy_provider
->dev
= dev
;
1132 phy_provider
->children
= of_node_get(children
);
1133 phy_provider
->owner
= owner
;
1134 phy_provider
->of_xlate
= of_xlate
;
1136 mutex_lock(&phy_provider_mutex
);
1137 list_add_tail(&phy_provider
->list
, &phy_provider_list
);
1138 mutex_unlock(&phy_provider_mutex
);
1140 return phy_provider
;
1142 EXPORT_SYMBOL_GPL(__of_phy_provider_register
);
1145 * __devm_of_phy_provider_register() - create/register phy provider with the
1147 * @dev: struct device of the phy provider
1148 * @children: device node containing children (if different from dev->of_node)
1149 * @owner: the module owner containing of_xlate
1150 * @of_xlate: function pointer to obtain phy instance from phy provider
1152 * Creates struct phy_provider from dev and of_xlate function pointer.
1153 * This is used in the case of dt boot for finding the phy instance from
1154 * phy provider. While at that, it also associates the device with the
1155 * phy provider using devres. On driver detach, release function is invoked
1156 * on the devres data, then, devres data is freed.
1158 struct phy_provider
*__devm_of_phy_provider_register(struct device
*dev
,
1159 struct device_node
*children
, struct module
*owner
,
1160 struct phy
* (*of_xlate
)(struct device
*dev
,
1161 const struct of_phandle_args
*args
))
1163 struct phy_provider
**ptr
, *phy_provider
;
1165 ptr
= devres_alloc(devm_phy_provider_release
, sizeof(*ptr
), GFP_KERNEL
);
1167 return ERR_PTR(-ENOMEM
);
1169 phy_provider
= __of_phy_provider_register(dev
, children
, owner
,
1171 if (!IS_ERR(phy_provider
)) {
1172 *ptr
= phy_provider
;
1173 devres_add(dev
, ptr
);
1178 return phy_provider
;
1180 EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register
);
1183 * of_phy_provider_unregister() - unregister phy provider from the framework
1184 * @phy_provider: phy provider returned by of_phy_provider_register()
1186 * Removes the phy_provider created using of_phy_provider_register().
1188 void of_phy_provider_unregister(struct phy_provider
*phy_provider
)
1190 if (IS_ERR(phy_provider
))
1193 mutex_lock(&phy_provider_mutex
);
1194 list_del(&phy_provider
->list
);
1195 of_node_put(phy_provider
->children
);
1196 kfree(phy_provider
);
1197 mutex_unlock(&phy_provider_mutex
);
1199 EXPORT_SYMBOL_GPL(of_phy_provider_unregister
);
1202 * devm_of_phy_provider_unregister() - remove phy provider from the framework
1203 * @dev: struct device of the phy provider
1204 * @phy_provider: phy provider returned by of_phy_provider_register()
1206 * destroys the devres associated with this phy provider and invokes
1207 * of_phy_provider_unregister to unregister the phy provider.
1209 void devm_of_phy_provider_unregister(struct device
*dev
,
1210 struct phy_provider
*phy_provider
)
1214 r
= devres_destroy(dev
, devm_phy_provider_release
, devm_phy_match
,
1216 dev_WARN_ONCE(dev
, r
, "couldn't find PHY provider device resource\n");
1218 EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister
);
1221 * phy_release() - release the phy
1222 * @dev: the dev member within phy
1224 * When the last reference to the device is removed, it is called
1225 * from the embedded kobject as release method.
1227 static void phy_release(struct device
*dev
)
1232 dev_vdbg(dev
, "releasing '%s'\n", dev_name(dev
));
1233 debugfs_remove_recursive(phy
->debugfs
);
1234 regulator_put(phy
->pwr
);
1235 ida_free(&phy_ida
, phy
->id
);
1239 static int __init
phy_core_init(void)
1241 phy_class
= class_create("phy");
1242 if (IS_ERR(phy_class
)) {
1243 pr_err("failed to create phy class --> %ld\n",
1244 PTR_ERR(phy_class
));
1245 return PTR_ERR(phy_class
);
1248 phy_class
->dev_release
= phy_release
;
1250 phy_debugfs_root
= debugfs_create_dir("phy", NULL
);
1254 device_initcall(phy_core_init
);
1256 static void __exit
phy_core_exit(void)
1258 debugfs_remove_recursive(phy_debugfs_root
);
1259 class_destroy(phy_class
);
1261 module_exit(phy_core_exit
);