[mirror_ubuntu-jammy-kernel.git] / drivers / regulator / devres.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * devres.c  --  Voltage/Current Regulator framework devres implementation.
 *
 * Copyright 2013 Linaro Ltd
 */

#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/module.h>

#include "internal.h"

static void devm_regulator_release(struct device *dev, void *res)
{
	regulator_put(*(struct regulator **)res);
}

static struct regulator *_devm_regulator_get(struct device *dev, const char *id,
					     int get_type)
{
	struct regulator **ptr, *regulator;

	ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return ERR_PTR(-ENOMEM);

	regulator = _regulator_get(dev, id, get_type);
	if (!IS_ERR(regulator)) {
		*ptr = regulator;
		devres_add(dev, ptr);
	} else {
		devres_free(ptr);
	}

	return regulator;
}

/**
 * devm_regulator_get - Resource managed regulator_get()
 * @dev: device to supply
 * @id:  supply name or regulator ID.
 *
 * Managed regulator_get(). Regulators returned from this function are
 * automatically regulator_put() on driver detach. See regulator_get() for more
 * information.
 */
struct regulator *devm_regulator_get(struct device *dev, const char *id)
{
	return _devm_regulator_get(dev, id, NORMAL_GET);
}
EXPORT_SYMBOL_GPL(devm_regulator_get);

/**
 * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
 * @dev: device to supply
 * @id:  supply name or regulator ID.
 *
 * Managed regulator_get_exclusive(). Regulators returned from this function
 * are automatically regulator_put() on driver detach. See regulator_get() for
 * more information.
 */
struct regulator *devm_regulator_get_exclusive(struct device *dev,
					       const char *id)
{
	return _devm_regulator_get(dev, id, EXCLUSIVE_GET);
}
EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);

/**
 * devm_regulator_get_optional - Resource managed regulator_get_optional()
 * @dev: device to supply
 * @id:  supply name or regulator ID.
 *
 * Managed regulator_get_optional(). Regulators returned from this
 * function are automatically regulator_put() on driver detach. See
 * regulator_get_optional() for more information.
 */
struct regulator *devm_regulator_get_optional(struct device *dev,
					      const char *id)
{
	return _devm_regulator_get(dev, id, OPTIONAL_GET);
}
EXPORT_SYMBOL_GPL(devm_regulator_get_optional);

static int devm_regulator_match(struct device *dev, void *res, void *data)
{
	struct regulator **r = res;
	if (!r || !*r) {
		WARN_ON(!r || !*r);
		return 0;
	}
	return *r == data;
}

/**
 * devm_regulator_put - Resource managed regulator_put()
 * @regulator: regulator to free
 *
 * Deallocate a regulator allocated with devm_regulator_get(). Normally
 * this function will not need to be called and the resource management
 * code will ensure that the resource is freed.
 */
void devm_regulator_put(struct regulator *regulator)
{
	int rc;

	rc = devres_release(regulator->dev, devm_regulator_release,
			    devm_regulator_match, regulator);
	if (rc != 0)
		WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_put);

struct regulator_bulk_devres {
	struct regulator_bulk_data *consumers;
	int num_consumers;
};

static void devm_regulator_bulk_release(struct device *dev, void *res)
{
	struct regulator_bulk_devres *devres = res;

	regulator_bulk_free(devres->num_consumers, devres->consumers);
}

/**
 * devm_regulator_bulk_get - managed get multiple regulator consumers
 *
 * @dev:           device to supply
 * @num_consumers: number of consumers to register
 * @consumers:     configuration of consumers; clients are stored here.
 *
 * @return 0 on success, an errno on failure.
 *
 * This helper function allows drivers to get several regulator
 * consumers in one operation with management, the regulators will
 * automatically be freed when the device is unbound.  If any of the
 * regulators cannot be acquired then any regulators that were
 * allocated will be freed before returning to the caller.
 */
int devm_regulator_bulk_get(struct device *dev, int num_consumers,
			    struct regulator_bulk_data *consumers)
{
	struct regulator_bulk_devres *devres;
	int ret;

	devres = devres_alloc(devm_regulator_bulk_release,
			      sizeof(*devres), GFP_KERNEL);
	if (!devres)
		return -ENOMEM;

	ret = regulator_bulk_get(dev, num_consumers, consumers);
	if (!ret) {
		devres->consumers = consumers;
		devres->num_consumers = num_consumers;
		devres_add(dev, devres);
	} else {
		devres_free(devres);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);

static void devm_rdev_release(struct device *dev, void *res)
{
	regulator_unregister(*(struct regulator_dev **)res);
}

/**
 * devm_regulator_register - Resource managed regulator_register()
 * @dev:            device to supply
 * @regulator_desc: regulator to register
 * @config:         runtime configuration for regulator
 *
 * Called by regulator drivers to register a regulator.  Returns a
 * valid pointer to struct regulator_dev on success or an ERR_PTR() on
 * error.  The regulator will automatically be released when the device
 * is unbound.
 */
struct regulator_dev *devm_regulator_register(struct device *dev,
				  const struct regulator_desc *regulator_desc,
				  const struct regulator_config *config)
{
	struct regulator_dev **ptr, *rdev;

	ptr = devres_alloc(devm_rdev_release, sizeof(*ptr),
			   GFP_KERNEL);
	if (!ptr)
		return ERR_PTR(-ENOMEM);

	rdev = regulator_register(regulator_desc, config);
	if (!IS_ERR(rdev)) {
		*ptr = rdev;
		devres_add(dev, ptr);
	} else {
		devres_free(ptr);
	}

	return rdev;
}
EXPORT_SYMBOL_GPL(devm_regulator_register);

static int devm_rdev_match(struct device *dev, void *res, void *data)
{
	struct regulator_dev **r = res;
	if (!r || !*r) {
		WARN_ON(!r || !*r);
		return 0;
	}
	return *r == data;
}

/**
 * devm_regulator_unregister - Resource managed regulator_unregister()
 * @dev:  device to supply
 * @rdev: regulator to free
 *
 * Unregister a regulator registered with devm_regulator_register().
 * Normally this function will not need to be called and the resource
 * management code will ensure that the resource is freed.
 */
void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev)
{
	int rc;

	rc = devres_release(dev, devm_rdev_release, devm_rdev_match, rdev);
	if (rc != 0)
		WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_unregister);

struct regulator_supply_alias_match {
	struct device *dev;
	const char *id;
};

static int devm_regulator_match_supply_alias(struct device *dev, void *res,
					     void *data)
{
	struct regulator_supply_alias_match *match = res;
	struct regulator_supply_alias_match *target = data;

	return match->dev == target->dev && strcmp(match->id, target->id) == 0;
}

static void devm_regulator_destroy_supply_alias(struct device *dev, void *res)
{
	struct regulator_supply_alias_match *match = res;

	regulator_unregister_supply_alias(match->dev, match->id);
}

/**
 * devm_regulator_register_supply_alias - Resource managed
 * regulator_register_supply_alias()
 *
 * @dev:       device to supply
 * @id:        supply name or regulator ID
 * @alias_dev: device that should be used to lookup the supply
 * @alias_id:  supply name or regulator ID that should be used to lookup the
 * supply
 *
 * The supply alias will automatically be unregistered when the source
 * device is unbound.
 */
int devm_regulator_register_supply_alias(struct device *dev, const char *id,
					 struct device *alias_dev,
					 const char *alias_id)
{
	struct regulator_supply_alias_match *match;
	int ret;

	match = devres_alloc(devm_regulator_destroy_supply_alias,
			   sizeof(struct regulator_supply_alias_match),
			   GFP_KERNEL);
	if (!match)
		return -ENOMEM;

	match->dev = dev;
	match->id = id;

	ret = regulator_register_supply_alias(dev, id, alias_dev, alias_id);
	if (ret < 0) {
		devres_free(match);
		return ret;
	}

	devres_add(dev, match);

	return 0;
}
EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias);

/**
 * devm_regulator_unregister_supply_alias - Resource managed
 * regulator_unregister_supply_alias()
 *
 * @dev: device to supply
 * @id:  supply name or regulator ID
 *
 * Unregister an alias registered with
 * devm_regulator_register_supply_alias(). Normally this function
 * will not need to be called and the resource management code
 * will ensure that the resource is freed.
 */
void devm_regulator_unregister_supply_alias(struct device *dev, const char *id)
{
	struct regulator_supply_alias_match match;
	int rc;

	match.dev = dev;
	match.id = id;

	rc = devres_release(dev, devm_regulator_destroy_supply_alias,
			    devm_regulator_match_supply_alias, &match);
	if (rc != 0)
		WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_unregister_supply_alias);

/**
 * devm_regulator_bulk_register_supply_alias - Managed register
 * multiple aliases
 *
 * @dev:       device to supply
 * @id:        list of supply names or regulator IDs
 * @alias_dev: device that should be used to lookup the supply
 * @alias_id:  list of supply names or regulator IDs that should be used to
 *             lookup the supply
 * @num_id:    number of aliases to register
 *
 * @return 0 on success, an errno on failure.
 *
 * This helper function allows drivers to register several supply
 * aliases in one operation, the aliases will be automatically
 * unregisters when the source device is unbound.  If any of the
 * aliases cannot be registered any aliases that were registered
 * will be removed before returning to the caller.
 */
int devm_regulator_bulk_register_supply_alias(struct device *dev,
					      const char *const *id,
					      struct device *alias_dev,
					      const char *const *alias_id,
					      int num_id)
{
	int i;
	int ret;

	for (i = 0; i < num_id; ++i) {
		ret = devm_regulator_register_supply_alias(dev, id[i],
							   alias_dev,
							   alias_id[i]);
		if (ret < 0)
			goto err;
	}

	return 0;

err:
	dev_err(dev,
		"Failed to create supply alias %s,%s -> %s,%s\n",
		id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));

	while (--i >= 0)
		devm_regulator_unregister_supply_alias(dev, id[i]);

	return ret;
}
EXPORT_SYMBOL_GPL(devm_regulator_bulk_register_supply_alias);

/**
 * devm_regulator_bulk_unregister_supply_alias - Managed unregister
 * multiple aliases
 *
 * @dev:    device to supply
 * @id:     list of supply names or regulator IDs
 * @num_id: number of aliases to unregister
 *
 * Unregister aliases registered with
 * devm_regulator_bulk_register_supply_alias(). Normally this function
 * will not need to be called and the resource management code
 * will ensure that the resource is freed.
 */
void devm_regulator_bulk_unregister_supply_alias(struct device *dev,
						 const char *const *id,
						 int num_id)
{
	int i;

	for (i = 0; i < num_id; ++i)
		devm_regulator_unregister_supply_alias(dev, id[i]);
}
EXPORT_SYMBOL_GPL(devm_regulator_bulk_unregister_supply_alias);

struct regulator_notifier_match {
	struct regulator *regulator;
	struct notifier_block *nb;
};

static int devm_regulator_match_notifier(struct device *dev, void *res,
					 void *data)
{
	struct regulator_notifier_match *match = res;
	struct regulator_notifier_match *target = data;

	return match->regulator == target->regulator && match->nb == target->nb;
}

static void devm_regulator_destroy_notifier(struct device *dev, void *res)
{
	struct regulator_notifier_match *match = res;

	regulator_unregister_notifier(match->regulator, match->nb);
}

/**
 * devm_regulator_register_notifier - Resource managed
 * regulator_register_notifier
 *
 * @regulator: regulator source
 * @nb:        notifier block
 *
 * The notifier will be registers under the consumer device and be
 * automatically be unregistered when the source device is unbound.
 */
int devm_regulator_register_notifier(struct regulator *regulator,
				     struct notifier_block *nb)
{
	struct regulator_notifier_match *match;
	int ret;

	match = devres_alloc(devm_regulator_destroy_notifier,
			     sizeof(struct regulator_notifier_match),
			     GFP_KERNEL);
	if (!match)
		return -ENOMEM;

	match->regulator = regulator;
	match->nb = nb;

	ret = regulator_register_notifier(regulator, nb);
	if (ret < 0) {
		devres_free(match);
		return ret;
	}

	devres_add(regulator->dev, match);

	return 0;
}
EXPORT_SYMBOL_GPL(devm_regulator_register_notifier);

/**
 * devm_regulator_unregister_notifier - Resource managed
 * regulator_unregister_notifier()
 *
 * @regulator: regulator source
 * @nb:        notifier block
 *
 * Unregister a notifier registered with devm_regulator_register_notifier().
 * Normally this function will not need to be called and the resource
 * management code will ensure that the resource is freed.
 */
void devm_regulator_unregister_notifier(struct regulator *regulator,
					struct notifier_block *nb)
{
	struct regulator_notifier_match match;
	int rc;

	match.regulator = regulator;
	match.nb = nb;

	rc = devres_release(regulator->dev, devm_regulator_destroy_notifier,
			    devm_regulator_match_notifier, &match);
	if (rc != 0)
		WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_unregister_notifier);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
0cdfcc0f MB	2	/*
	3	* devres.c -- Voltage/Current Regulator framework devres implementation.
	4	*
	5	* Copyright 2013 Linaro Ltd
0cdfcc0f MB	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/err.h>
	10	#include <linux/regmap.h>
	11	#include <linux/regulator/consumer.h>
	12	#include <linux/regulator/driver.h>
	13	#include <linux/module.h>
	14
	15	#include "internal.h"
	16
0cdfcc0f MB	17	static void devm_regulator_release(struct device dev, void res)
	18	{
	19	regulator_put((struct regulator *)res);
	20	}
	21
	22	static struct regulator _devm_regulator_get(struct device dev, const char *id,
	23	int get_type)
	24	{
	25	struct regulator *ptr, regulator;
	26
	27	ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
	28	if (!ptr)
	29	return ERR_PTR(-ENOMEM);
	30
a8bd42a9	31	regulator = _regulator_get(dev, id, get_type);
0cdfcc0f MB	32	if (!IS_ERR(regulator)) {
	33	*ptr = regulator;
	34	devres_add(dev, ptr);
	35	} else {
	36	devres_free(ptr);
	37	}
	38
	39	return regulator;
	40	}
	41
	42	/**
	43	* devm_regulator_get - Resource managed regulator_get()
a7c15187 LJ	44	* @dev: device to supply
a7c15187 LJ	45	* @id: supply name or regulator ID.
0cdfcc0f MB	46	*
	47	* Managed regulator_get(). Regulators returned from this function are
	48	* automatically regulator_put() on driver detach. See regulator_get() for more
	49	* information.
	50	*/
	51	struct regulator devm_regulator_get(struct device dev, const char *id)
	52	{
	53	return _devm_regulator_get(dev, id, NORMAL_GET);
	54	}
	55	EXPORT_SYMBOL_GPL(devm_regulator_get);
	56
	57	/**
	58	* devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
a7c15187 LJ	59	* @dev: device to supply
a7c15187 LJ	60	* @id: supply name or regulator ID.
0cdfcc0f MB	61	*
	62	* Managed regulator_get_exclusive(). Regulators returned from this function
	63	* are automatically regulator_put() on driver detach. See regulator_get() for
	64	* more information.
	65	*/
	66	struct regulator devm_regulator_get_exclusive(struct device dev,
	67	const char *id)
	68	{
	69	return _devm_regulator_get(dev, id, EXCLUSIVE_GET);
	70	}
	71	EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
	72
	73	/**
	74	* devm_regulator_get_optional - Resource managed regulator_get_optional()
a7c15187 LJ	75	* @dev: device to supply
a7c15187 LJ	76	* @id: supply name or regulator ID.
0cdfcc0f MB	77	*
	78	* Managed regulator_get_optional(). Regulators returned from this
	79	* function are automatically regulator_put() on driver detach. See
	80	* regulator_get_optional() for more information.
	81	*/
	82	struct regulator devm_regulator_get_optional(struct device dev,
	83	const char *id)
	84	{
	85	return _devm_regulator_get(dev, id, OPTIONAL_GET);
	86	}
	87	EXPORT_SYMBOL_GPL(devm_regulator_get_optional);
	88
	89	static int devm_regulator_match(struct device dev, void res, void *data)
	90	{
	91	struct regulator **r = res;
	92	if (!r \|\| !*r) {
	93	WARN_ON(!r \|\| !*r);
	94	return 0;
	95	}
	96	return *r == data;
	97	}
	98
	99	/**
	100	* devm_regulator_put - Resource managed regulator_put()
	101	* @regulator: regulator to free
	102	*
	103	* Deallocate a regulator allocated with devm_regulator_get(). Normally
	104	* this function will not need to be called and the resource management
	105	* code will ensure that the resource is freed.
	106	*/
	107	void devm_regulator_put(struct regulator *regulator)
	108	{
	109	int rc;
	110
	111	rc = devres_release(regulator->dev, devm_regulator_release,
	112	devm_regulator_match, regulator);
	113	if (rc != 0)
	114	WARN_ON(rc);
	115	}
	116	EXPORT_SYMBOL_GPL(devm_regulator_put);
	117
3eaeb475 DT	118	struct regulator_bulk_devres {
	119	struct regulator_bulk_data *consumers;
	120	int num_consumers;
	121	};
	122
	123	static void devm_regulator_bulk_release(struct device dev, void res)
	124	{
	125	struct regulator_bulk_devres *devres = res;
	126
	127	regulator_bulk_free(devres->num_consumers, devres->consumers);
	128	}
	129
0cdfcc0f MB	130	/**
	131	* devm_regulator_bulk_get - managed get multiple regulator consumers
	132	*
a7c15187 LJ	133	* @dev: device to supply
	134	* @num_consumers: number of consumers to register
	135	* @consumers: configuration of consumers; clients are stored here.
0cdfcc0f MB	136	*
	137	* @return 0 on success, an errno on failure.
	138	*
	139	* This helper function allows drivers to get several regulator
	140	* consumers in one operation with management, the regulators will
	141	* automatically be freed when the device is unbound. If any of the
	142	* regulators cannot be acquired then any regulators that were
	143	* allocated will be freed before returning to the caller.
	144	*/
	145	int devm_regulator_bulk_get(struct device *dev, int num_consumers,
	146	struct regulator_bulk_data *consumers)
	147	{
3eaeb475	148	struct regulator_bulk_devres *devres;
0cdfcc0f MB	149	int ret;
0cdfcc0f MB	150
3eaeb475 DT	151	devres = devres_alloc(devm_regulator_bulk_release,
	152	sizeof(*devres), GFP_KERNEL);
	153	if (!devres)
	154	return -ENOMEM;
0cdfcc0f	155
3eaeb475 DT	156	ret = regulator_bulk_get(dev, num_consumers, consumers);
	157	if (!ret) {
	158	devres->consumers = consumers;
	159	devres->num_consumers = num_consumers;
	160	devres_add(dev, devres);
	161	} else {
	162	devres_free(devres);
	163	}
0cdfcc0f MB	164
	165	return ret;
	166	}
	167	EXPORT_SYMBOL_GPL(devm_regulator_bulk_get);
	168
	169	static void devm_rdev_release(struct device dev, void res)
	170	{
	171	regulator_unregister((struct regulator_dev *)res);
	172	}
	173
	174	/**
	175	* devm_regulator_register - Resource managed regulator_register()
a7c15187	176	* @dev: device to supply
0cdfcc0f	177	* @regulator_desc: regulator to register
a7c15187	178	* @config: runtime configuration for regulator
0cdfcc0f MB	179	*
	180	* Called by regulator drivers to register a regulator. Returns a
	181	* valid pointer to struct regulator_dev on success or an ERR_PTR() on
	182	* error. The regulator will automatically be released when the device
	183	* is unbound.
	184	*/
	185	struct regulator_dev devm_regulator_register(struct device dev,
	186	const struct regulator_desc *regulator_desc,
	187	const struct regulator_config *config)
	188	{
	189	struct regulator_dev *ptr, rdev;
	190
	191	ptr = devres_alloc(devm_rdev_release, sizeof(*ptr),
	192	GFP_KERNEL);
	193	if (!ptr)
	194	return ERR_PTR(-ENOMEM);
	195
	196	rdev = regulator_register(regulator_desc, config);
	197	if (!IS_ERR(rdev)) {
	198	*ptr = rdev;
	199	devres_add(dev, ptr);
	200	} else {
	201	devres_free(ptr);
	202	}
	203
	204	return rdev;
	205	}
	206	EXPORT_SYMBOL_GPL(devm_regulator_register);
	207
	208	static int devm_rdev_match(struct device dev, void res, void *data)
	209	{
	210	struct regulator_dev **r = res;
	211	if (!r \|\| !*r) {
	212	WARN_ON(!r \|\| !*r);
	213	return 0;
	214	}
	215	return *r == data;
	216	}
	217
	218	/**
	219	* devm_regulator_unregister - Resource managed regulator_unregister()
9565cccd LJ	220	* @dev: device to supply
9565cccd LJ	221	* @rdev: regulator to free
0cdfcc0f MB	222	*
	223	* Unregister a regulator registered with devm_regulator_register().
	224	* Normally this function will not need to be called and the resource
	225	* management code will ensure that the resource is freed.
	226	*/
	227	void devm_regulator_unregister(struct device dev, struct regulator_dev rdev)
	228	{
	229	int rc;
	230
	231	rc = devres_release(dev, devm_rdev_release, devm_rdev_match, rdev);
	232	if (rc != 0)
	233	WARN_ON(rc);
	234	}
	235	EXPORT_SYMBOL_GPL(devm_regulator_unregister);
a06ccd9c CK	236
	237	struct regulator_supply_alias_match {
	238	struct device *dev;
	239	const char *id;
	240	};
	241
	242	static int devm_regulator_match_supply_alias(struct device dev, void res,
	243	void *data)
	244	{
	245	struct regulator_supply_alias_match *match = res;
	246	struct regulator_supply_alias_match *target = data;
	247
	248	return match->dev == target->dev && strcmp(match->id, target->id) == 0;
	249	}
	250
	251	static void devm_regulator_destroy_supply_alias(struct device dev, void res)
	252	{
	253	struct regulator_supply_alias_match *match = res;
	254
	255	regulator_unregister_supply_alias(match->dev, match->id);
	256	}
	257
	258	/**
	259	* devm_regulator_register_supply_alias - Resource managed
	260	* regulator_register_supply_alias()
	261	*
a7c15187 LJ	262	* @dev: device to supply
a7c15187 LJ	263	* @id: supply name or regulator ID
a06ccd9c	264	* @alias_dev: device that should be used to lookup the supply
a7c15187	265	* @alias_id: supply name or regulator ID that should be used to lookup the
a06ccd9c CK	266	* supply
	267	*
	268	* The supply alias will automatically be unregistered when the source
	269	* device is unbound.
	270	*/
	271	int devm_regulator_register_supply_alias(struct device dev, const char id,
	272	struct device *alias_dev,
	273	const char *alias_id)
	274	{
	275	struct regulator_supply_alias_match *match;
	276	int ret;
	277
	278	match = devres_alloc(devm_regulator_destroy_supply_alias,
	279	sizeof(struct regulator_supply_alias_match),
	280	GFP_KERNEL);
	281	if (!match)
	282	return -ENOMEM;
	283
	284	match->dev = dev;
	285	match->id = id;
	286
	287	ret = regulator_register_supply_alias(dev, id, alias_dev, alias_id);
	288	if (ret < 0) {
	289	devres_free(match);
	290	return ret;
	291	}
	292
	293	devres_add(dev, match);
	294
	295	return 0;
	296	}
	297	EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias);
	298
	299	/**
	300	* devm_regulator_unregister_supply_alias - Resource managed
	301	* regulator_unregister_supply_alias()
	302	*
a7c15187 LJ	303	* @dev: device to supply
a7c15187 LJ	304	* @id: supply name or regulator ID
a06ccd9c CK	305	*
	306	* Unregister an alias registered with
	307	* devm_regulator_register_supply_alias(). Normally this function
	308	* will not need to be called and the resource management code
	309	* will ensure that the resource is freed.
	310	*/
	311	void devm_regulator_unregister_supply_alias(struct device dev, const char id)
	312	{
	313	struct regulator_supply_alias_match match;
	314	int rc;
	315
	316	match.dev = dev;
	317	match.id = id;
	318
	319	rc = devres_release(dev, devm_regulator_destroy_supply_alias,
	320	devm_regulator_match_supply_alias, &match);
	321	if (rc != 0)
	322	WARN_ON(rc);
	323	}
	324	EXPORT_SYMBOL_GPL(devm_regulator_unregister_supply_alias);
	325
	326	/**
	327	* devm_regulator_bulk_register_supply_alias - Managed register
	328	* multiple aliases
	329	*
a7c15187 LJ	330	* @dev: device to supply
a7c15187 LJ	331	* @id: list of supply names or regulator IDs
a06ccd9c	332	* @alias_dev: device that should be used to lookup the supply
a7c15187 LJ	333	* @alias_id: list of supply names or regulator IDs that should be used to
	334	* lookup the supply
	335	* @num_id: number of aliases to register
a06ccd9c CK	336	*
	337	* @return 0 on success, an errno on failure.
	338	*
	339	* This helper function allows drivers to register several supply
	340	* aliases in one operation, the aliases will be automatically
	341	* unregisters when the source device is unbound. If any of the
	342	* aliases cannot be registered any aliases that were registered
	343	* will be removed before returning to the caller.
	344	*/
	345	int devm_regulator_bulk_register_supply_alias(struct device *dev,
9f8c0fe9	346	const char const id,
a06ccd9c	347	struct device *alias_dev,
9f8c0fe9	348	const char const alias_id,
a06ccd9c CK	349	int num_id)
	350	{
	351	int i;
	352	int ret;
	353
	354	for (i = 0; i < num_id; ++i) {
	355	ret = devm_regulator_register_supply_alias(dev, id[i],
	356	alias_dev,
	357	alias_id[i]);
	358	if (ret < 0)
	359	goto err;
	360	}
	361
	362	return 0;
	363
	364	err:
	365	dev_err(dev,
	366	"Failed to create supply alias %s,%s -> %s,%s\n",
	367	id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));
	368
	369	while (--i >= 0)
	370	devm_regulator_unregister_supply_alias(dev, id[i]);
	371
	372	return ret;
	373	}
	374	EXPORT_SYMBOL_GPL(devm_regulator_bulk_register_supply_alias);
	375
	376	/**
	377	* devm_regulator_bulk_unregister_supply_alias - Managed unregister
	378	* multiple aliases
	379	*
a7c15187 LJ	380	* @dev: device to supply
	381	* @id: list of supply names or regulator IDs
	382	* @num_id: number of aliases to unregister
a06ccd9c CK	383	*
	384	* Unregister aliases registered with
	385	* devm_regulator_bulk_register_supply_alias(). Normally this function
	386	* will not need to be called and the resource management code
	387	* will ensure that the resource is freed.
	388	*/
	389	void devm_regulator_bulk_unregister_supply_alias(struct device *dev,
9f8c0fe9	390	const char const id,
a06ccd9c CK	391	int num_id)
	392	{
	393	int i;
	394
	395	for (i = 0; i < num_id; ++i)
	396	devm_regulator_unregister_supply_alias(dev, id[i]);
	397	}
	398	EXPORT_SYMBOL_GPL(devm_regulator_bulk_unregister_supply_alias);
046db763 CK	399
	400	struct regulator_notifier_match {
	401	struct regulator *regulator;
	402	struct notifier_block *nb;
	403	};
	404
	405	static int devm_regulator_match_notifier(struct device dev, void res,
	406	void *data)
	407	{
	408	struct regulator_notifier_match *match = res;
	409	struct regulator_notifier_match *target = data;
	410
	411	return match->regulator == target->regulator && match->nb == target->nb;
	412	}
	413
	414	static void devm_regulator_destroy_notifier(struct device dev, void res)
	415	{
	416	struct regulator_notifier_match *match = res;
	417
	418	regulator_unregister_notifier(match->regulator, match->nb);
	419	}
	420
	421	/**
	422	* devm_regulator_register_notifier - Resource managed
	423	* regulator_register_notifier
	424	*
	425	* @regulator: regulator source
a7c15187	426	* @nb: notifier block
046db763 CK	427	*
	428	* The notifier will be registers under the consumer device and be
	429	* automatically be unregistered when the source device is unbound.
	430	*/
	431	int devm_regulator_register_notifier(struct regulator *regulator,
	432	struct notifier_block *nb)
	433	{
	434	struct regulator_notifier_match *match;
	435	int ret;
	436
	437	match = devres_alloc(devm_regulator_destroy_notifier,
	438	sizeof(struct regulator_notifier_match),
	439	GFP_KERNEL);
	440	if (!match)
	441	return -ENOMEM;
	442
	443	match->regulator = regulator;
	444	match->nb = nb;
	445
	446	ret = regulator_register_notifier(regulator, nb);
	447	if (ret < 0) {
	448	devres_free(match);
	449	return ret;
	450	}
	451
	452	devres_add(regulator->dev, match);
	453
	454	return 0;
	455	}
	456	EXPORT_SYMBOL_GPL(devm_regulator_register_notifier);
	457
	458	/**
	459	* devm_regulator_unregister_notifier - Resource managed
	460	* regulator_unregister_notifier()
	461	*
	462	* @regulator: regulator source
a7c15187	463	* @nb: notifier block
046db763 CK	464	*
	465	* Unregister a notifier registered with devm_regulator_register_notifier().
	466	* Normally this function will not need to be called and the resource
	467	* management code will ensure that the resource is freed.
	468	*/
	469	void devm_regulator_unregister_notifier(struct regulator *regulator,
	470	struct notifier_block *nb)
	471	{
	472	struct regulator_notifier_match match;
	473	int rc;
	474
	475	match.regulator = regulator;
	476	match.nb = nb;
	477
	478	rc = devres_release(regulator->dev, devm_regulator_destroy_notifier,
	479	devm_regulator_match_notifier, &match);
	480	if (rc != 0)
	481	WARN_ON(rc);
	482	}
	483	EXPORT_SYMBOL_GPL(devm_regulator_unregister_notifier);