diff options
Diffstat (limited to 'arch/arm/mach-u300/gpio.c')
| -rw-r--r-- | arch/arm/mach-u300/gpio.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/gpio.c b/arch/arm/mach-u300/gpio.c index 63c8f27fb15..0b35826b7d1 100644 --- a/arch/arm/mach-u300/gpio.c +++ b/arch/arm/mach-u300/gpio.c @@ -281,6 +281,16 @@ int gpio_unregister_callback(unsigned gpio) } EXPORT_SYMBOL(gpio_unregister_callback); +/* Non-zero means valid */ +int gpio_is_valid(int number) +{ + if (number >= 0 && + number < (U300_GPIO_NUM_PORTS * U300_GPIO_PINS_PER_PORT)) + return 1; + return 0; +} +EXPORT_SYMBOL(gpio_is_valid); + int gpio_request(unsigned gpio, const char *label) { if (gpio_pin[gpio].users) |