diff options
Diffstat (limited to 'include/gpio.h')
| -rw-r--r-- | include/gpio.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/gpio.h b/include/gpio.h index 4a97521aee..f116ea6af7 100644 --- a/include/gpio.h +++ b/include/gpio.h @@ -3,6 +3,17 @@ #include <asm/gpio.h> +#define ARCH_NR_GPIOS 256 + +static inline int gpio_is_valid(int gpio) +{ + if (gpio < 0) + return 0; + if (gpio < ARCH_NR_GPIOS) + return 1; + return 0; +} + #define GPIOF_DIR_OUT (0 << 0) #define GPIOF_DIR_IN (1 << 0) |