diff options
| author | Thomas Chou <thomas@wytron.com.tw> | 2010-12-27 10:46:01 +0800 |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2011-02-08 08:29:53 -0500 |
| commit | d8a593c68bac7b9d9b26af6fa8c392671213ce93 (patch) | |
| tree | 837a43ae4ef7ac2e87c1facbb480ca8d5ba21656 /arch/nios2/include/asm | |
| parent | 85debefaf2d3d0dea800fa84bfe0e9823bc03d89 (diff) | |
nios2: add gpio_is_valid
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'arch/nios2/include/asm')
| -rw-r--r-- | arch/nios2/include/asm/gpio.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h index 36a71324d..4b21c8f7f 100644 --- a/arch/nios2/include/asm/gpio.h +++ b/arch/nios2/include/asm/gpio.h @@ -52,6 +52,11 @@ static inline void gpio_set_value(unsigned gpio, int value) { writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + (gpio << 2)); } + +static inline int gpio_is_valid(int number) +{ + return ((unsigned)number) < CONFIG_SYS_GPIO_WIDTH; +} #else extern int gpio_request(unsigned gpio, const char *label); extern int gpio_free(unsigned gpio); @@ -59,6 +64,7 @@ extern int gpio_direction_input(unsigned gpio); extern int gpio_direction_output(unsigned gpio, int value); extern int gpio_get_value(unsigned gpio); extern void gpio_set_value(unsigned gpio, int value); +extern int gpio_is_valid(int number); #endif /* CONFIG_SYS_GPIO_BASE */ #endif /* _ASM_NIOS2_GPIO_H_ */ |