Commit c4f5b30d authored by Biju Das's avatar Biju Das Committed by Philipp Zabel
Browse files

reset: Add of_reset_control_get_optional_exclusive() 



Add optional variant of of_reset_control_get_exclusive(). If the
requested reset is not specified in the device tree, this function
returns NULL instead of an error.

Suggested-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20211112184413.4391-2-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent fa55b7dc

include/linux/reset.h

+20 −0
Original line number Diff line number Diff line
@@ -454,6 +454,26 @@ static inline struct reset_control *of_reset_control_get_exclusive( 
	return __of_reset_control_get(node, id, 0, false, false, true);

}



/**

 * of_reset_control_get_optional_exclusive - Lookup and obtain an optional exclusive

 *                                           reference to a reset controller.

 * @node: device to be reset by the controller

 * @id: reset line name

 *

 * Optional variant of of_reset_control_get_exclusive(). If the requested reset

 * is not specified in the device tree, this function returns NULL instead of

 * an error.

 *

 * Returns a struct reset_control or IS_ERR() condition containing errno.

 *

 * Use of id names is optional.

 */

static inline struct reset_control *of_reset_control_get_optional_exclusive(

				struct device_node *node, const char *id)

{

	return __of_reset_control_get(node, id, 0, false, true, true);

}



/**

 * of_reset_control_get_shared - Lookup and obtain a shared reference

 *                               to a reset controller.