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authorThomas Chou <thomas@wytron.com.tw>2010-12-27 10:46:01 +0800
committerScott McNutt <smcnutt@psyent.com>2011-02-08 08:29:53 -0500
commitd8a593c68bac7b9d9b26af6fa8c392671213ce93 (patch)
tree837a43ae4ef7ac2e87c1facbb480ca8d5ba21656 /arch
parent85debefaf2d3d0dea800fa84bfe0e9823bc03d89 (diff)
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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')
-rw-r--r--arch/nios2/include/asm/gpio.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h
index 36a7132..4b21c8f 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_ */