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regulator: Add devm_regulator_get_exclusive()

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Add a resource managed regulator_get_exclusive()

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Matthias Kaehlcke 2013-08-25 17:54:13 +02:00 committed by Mark Brown
parent 9e059bacec
commit 9efdd27678
2 changed files with 32 additions and 0 deletions
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30
drivers/regulator/core.c
View file

@ -1493,6 +1493,36 @@ static void _regulator_put(struct regulator *regulator)
module_put(rdev->owner);
}
/**
* devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
* @dev: device for regulator "consumer"
* @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)
{
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, 1);
if (!IS_ERR(regulator)) {
*ptr = regulator;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return regulator;
}
EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
/**
* regulator_put - "free" the regulator source
* @regulator: regulator source

2
include/linux/regulator/consumer.h
View file

@ -137,6 +137,8 @@ struct regulator *__must_check devm_regulator_get(struct device *dev,
const char *id);
struct regulator *__must_check regulator_get_exclusive(struct device *dev,
const char *id);
struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev,
const char *id);
struct regulator *__must_check regulator_get_optional(struct device *dev,
const char *id);
struct regulator *__must_check devm_regulator_get_optional(struct device *dev,