diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/gpio.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 1997888bbb..c2e7a5d368 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -1,6 +1,17 @@ #ifndef __ASM_GENERIC_GPIO_H #define __ASM_GENERIC_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; +} + void gpio_set_value(unsigned gpio, int value); int gpio_get_value(unsigned gpio); int gpio_direction_output(unsigned gpio, int value); |