From: Mark Brown <[email protected]> Many regulator drivers have a remove function that consists solely of calling regulator_unregister() so provide a devm_regulator_register() in order to allow this repeated code to be removed and help eliminate error handling code.
Signed-off-by: Mark Brown <[email protected]> --- drivers/regulator/core.c | 66 ++++++++++++++++++++++++++++++++++++++++ include/linux/regulator/driver.h | 5 +++ 2 files changed, 71 insertions(+) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a01b8b3..5f995d2 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -3492,6 +3492,44 @@ clean: } EXPORT_SYMBOL_GPL(regulator_register); +static void devm_rdev_release(struct device *dev, void *res) +{ + regulator_unregister(*(struct regulator_dev **)res); +} + +/** + * devm_regulator_register - Resource managed regulator_register() + * @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 automaticall 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); + /** * regulator_unregister - unregister regulator * @rdev: regulator to unregister @@ -3521,6 +3559,34 @@ void regulator_unregister(struct regulator_dev *rdev) } EXPORT_SYMBOL_GPL(regulator_unregister); +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() + * @regulator: 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); + /** * regulator_suspend_prepare - prepare regulators for system wide suspend * @state: system suspend state diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index 67e13aa..8474c7f 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -334,7 +334,12 @@ struct regulator_dev { struct regulator_dev * regulator_register(const struct regulator_desc *regulator_desc, const struct regulator_config *config); +struct regulator_dev * +devm_regulator_register(struct device *dev, + const struct regulator_desc *regulator_desc, + const struct regulator_config *config); void regulator_unregister(struct regulator_dev *rdev); +void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev); int regulator_notifier_call_chain(struct regulator_dev *rdev, unsigned long event, void *data); -- 1.8.4.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
