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regulator: Implement devm_regulator_free()

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Allow consumers to free regulators allocated using devm_regulator_get()
if they need to. This will not normally be required.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-01-20 20:09:18 +00:00
parent 070b907922
commit d5ad34f7cb
2 changed files with 29 additions and 0 deletions
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28
drivers/regulator/core.c
View File

@ -1421,6 +1421,34 @@ void regulator_put(struct regulator *regulator)
} }
EXPORT_SYMBOL_GPL(regulator_put); EXPORT_SYMBOL_GPL(regulator_put);
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_destroy(regulator->dev, devm_regulator_release,
devm_regulator_match, regulator);
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_regulator_put);
static int _regulator_can_change_status(struct regulator_dev *rdev) static int _regulator_can_change_status(struct regulator_dev *rdev)
{ {
if (!rdev->constraints) if (!rdev->constraints)

1
include/linux/regulator/consumer.h
View File

@ -137,6 +137,7 @@ struct regulator *__must_check devm_regulator_get(struct device *dev,
struct regulator *__must_check regulator_get_exclusive(struct device *dev, struct regulator *__must_check regulator_get_exclusive(struct device *dev,
const char *id); const char *id);
void regulator_put(struct regulator *regulator); void regulator_put(struct regulator *regulator);
void devm_regulator_free(struct regulator *regulator);
/* regulator output control and status */ /* regulator output control and status */
int regulator_enable(struct regulator *regulator); int regulator_enable(struct regulator *regulator);