diff options
Diffstat (limited to 'arch/arm/mach-at91/include/mach/gpio.h')
| -rw-r--r-- | arch/arm/mach-at91/include/mach/gpio.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/gpio.h b/arch/arm/mach-at91/include/mach/gpio.h index 3533bf9e3f..fa695a617c 100644 --- a/arch/arm/mach-at91/include/mach/gpio.h +++ b/arch/arm/mach-at91/include/mach/gpio.h @@ -22,6 +22,17 @@ /* these pin numbers double as IRQ numbers, like AT91xxx_ID_* values */ +#define ARCH_NR_GPIOS 256 + +static inline int gpio_is_valid(int gpio) +{ + if (gpio < 1) + return 0; + if (gpio < ARCH_NR_GPIOS) + return 1; + return 0; +} + #define AT91_PIN_PA0 (PIN_BASE + 0x00 + 0) #define AT91_PIN_PA1 (PIN_BASE + 0x00 + 1) #define AT91_PIN_PA2 (PIN_BASE + 0x00 + 2) |