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 <[email protected]> --- drivers/gpio/gpio-uclass.c | 7 +++++++ include/asm-generic/gpio.h | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index 0ed32b7217..4912dc8375 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -1192,6 +1192,13 @@ int gpio_request_by_line_name(struct udevice *dev, const char *line_name, { int ret; + if (!dev) { + uclass_foreach_dev_probe(UCLASS_GPIO, dev) + if (!gpio_request_by_line_name(dev, line_name, desc, flags)) + return 0; + return -ENOENT; + } + ret = dev_read_stringlist_search(dev, "gpio-line-names", line_name); if (ret < 0) return ret; diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 81f63f06f1..44ca2458cf 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -587,7 +587,8 @@ 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 -- 2.37.2
