From e1c97949ee922ccc84c4ef4364c9810aa76f6306 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Fri, 17 Mar 2023 21:12:22 +0100 Subject: gpio: allow passing NULL to gpio_request_by_line_name() to search all gpio controllers The API is more convenient to use if one doesn't have to know upfront which gpio controller has a line with the name one is searching for, and arrange to look that device up somehow. Or implement this loop oneself. Signed-off-by: Rasmus Villemoes Reviewed-by: Simon Glass --- include/asm-generic/gpio.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index dd0bdf2315e..c4a7fd28439 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -580,7 +580,8 @@ int gpio_request_by_name(struct udevice *dev, const char *list_name, * This allows boards to implement common behaviours using GPIOs while not * requiring specific GPIO offsets be used. * - * @dev: An instance of a GPIO controller udevice + * @dev: An instance of a GPIO controller udevice, or NULL to search + * all GPIO controller devices * @line_name: The name of the GPIO (e.g. "bmc-secure-boot") * @desc: A GPIO descriptor that is populated with the requested GPIO * upon return -- cgit v1.3.1