diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/gpio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 7e77b6ff45bb..464c5b334dc2 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -16,6 +16,12 @@ #define ARCH_NR_GPIOS 256 #endif +static inline int gpio_is_valid(int number) +{ + /* only some non-negative numbers are valid */ + return ((unsigned)number) < ARCH_NR_GPIOS; +} + struct seq_file; struct module; @@ -99,6 +105,12 @@ extern int __gpio_cansleep(unsigned gpio); #else +static inline int gpio_is_valid(int number) +{ + /* only non-negative numbers are valid */ + return number >= 0; +} + /* platforms that don't directly support access to GPIOs through I2C, SPI, * or other blocking infrastructure can use these wrappers. */ |