diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index c63eea0c1c8c..f5e522342ee5 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -352,6 +352,10 @@ REGULATOR devm_regulator_put() devm_regulator_register() +RESET + devm_reset_control_get() + devm_reset_controller_register() + SLAVE DMA ENGINE devm_acpi_dma_controller_register() diff --git a/drivers/reset/core.c b/drivers/reset/core.c index 72b32bd15549..395dc9ce492e 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -93,6 +93,43 @@ void reset_controller_unregister(struct reset_controller_dev *rcdev) } EXPORT_SYMBOL_GPL(reset_controller_unregister); +static void devm_reset_controller_release(struct device *dev, void *res) +{ + reset_controller_unregister(*(struct reset_controller_dev **)res); +} + +/** + * devm_reset_controller_register - resource managed reset_controller_register() + * @dev: device that is registering this reset controller + * @rcdev: a pointer to the initialized reset controller device + * + * Managed reset_controller_register(). For reset controllers registered by + * this function, reset_controller_unregister() is automatically called on + * driver detach. See reset_controller_register() for more information. + */ +int devm_reset_controller_register(struct device *dev, + struct reset_controller_dev *rcdev) +{ + struct reset_controller_dev **rcdevp; + int ret; + + rcdevp = devres_alloc(devm_reset_controller_release, sizeof(*rcdevp), + GFP_KERNEL); + if (!rcdevp) + return -ENOMEM; + + ret = reset_controller_register(rcdev); + if (!ret) { + *rcdevp = rcdev; + devres_add(dev, rcdevp); + } else { + devres_free(rcdevp); + } + + return ret; +} +EXPORT_SYMBOL_GPL(devm_reset_controller_register); + /** * reset_control_reset - reset the controlled device * @rstc: reset controller diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h index b91ba932bbd4..db1fe6772ad5 100644 --- a/include/linux/reset-controller.h +++ b/include/linux/reset-controller.h @@ -53,4 +53,8 @@ struct reset_controller_dev { int reset_controller_register(struct reset_controller_dev *rcdev); void reset_controller_unregister(struct reset_controller_dev *rcdev); +struct device; +int devm_reset_controller_register(struct device *dev, + struct reset_controller_dev *rcdev); + #endif