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Commit 8d5b5d5c authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Philipp Zabel
Browse files

reset: add devm_reset_controller_register API 



Add a device managed API for reset_controller_register().

This helps in reducing code in .remove callbacks and sometimes
dropping .remove callbacks entirely.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 1a695a90

Documentation/driver-model/devres.txt

+4 −0
Original line number Diff line number Diff line
@@ -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()

drivers/reset/core.c

+37 −0
Original line number Diff line number Diff line
@@ -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

include/linux/reset-controller.h

+4 −0
Original line number Diff line number Diff line
@@ -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