From d8a593c68bac7b9d9b26af6fa8c392671213ce93 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Mon, 27 Dec 2010 10:46:01 +0800 Subject: nios2: add gpio_is_valid Signed-off-by: Thomas Chou Signed-off-by: Scott McNutt --- arch/nios2/include/asm/gpio.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/nios2/include/asm') 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_ */ -- cgit v1.2.3