From d44f597b12b8f8099c3c52c3eb09540966cafe79 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 4 Oct 2014 11:29:49 -0600 Subject: dm: gpio: Add gpio_requestf() helper for printf() strings Add a helper which permits a printf()-style format string for the requester string. Signed-off-by: Simon Glass --- drivers/gpio/gpio-uclass.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index 63670932109..45e9a5ad227 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -130,6 +130,27 @@ int gpio_request(unsigned gpio, const char *label) return 0; } +/** + * gpio_requestf() - [COMPAT] Request GPIO + * @gpio: GPIO number + * @fmt: Format string for the requested GPIO + * @...: Arguments for the printf() format string + * + * This function implements the API that's compatible with current + * GPIO API used in U-Boot. The request is forwarded to particular + * GPIO driver. Returns 0 on success, negative value on error. + */ +int gpio_requestf(unsigned gpio, const char *fmt, ...) +{ + va_list args; + char buf[40]; + + va_start(args, fmt); + vscnprintf(buf, sizeof(buf), fmt, args); + va_end(args); + return gpio_request(gpio, buf); +} + /** * gpio_free() - [COMPAT] Relinquish GPIO * gpio: GPIO number -- cgit v1.2.3