diff options
| author | Rasmus Villemoes <rasmus.villemoes@prevas.dk> | 2023-03-17 21:12:22 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-03-30 15:09:59 -0400 |
| commit | e1c97949ee922ccc84c4ef4364c9810aa76f6306 (patch) | |
| tree | a64c106aa1c54001e61e02de15ff3d45fbe90332 | |
| parent | fdef6b982f0a24d4b3a83d107da4f817efa4566f (diff) | |
| download | u-boot-e1c97949ee922ccc84c4ef4364c9810aa76f6306.zip u-boot-e1c97949ee922ccc84c4ef4364c9810aa76f6306.tar.gz u-boot-e1c97949ee922ccc84c4ef4364c9810aa76f6306.tar.bz2 | |
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 <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/gpio/gpio-uclass.c | 7 | ||||
| -rw-r--r-- | include/asm-generic/gpio.h | 3 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index dbebf3a..c8be5a4 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -1171,6 +1171,13 @@ 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 dd0bdf2..c4a7fd2 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 |