[For next PATCH 1/1] gpio: move gpio_is_valid to gpio.h

[Jean-Christophe PLAGNIOL-VILLARD]

gpio < 0 means invalid too

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
 drivers/gpio/gpio.c        |    2 --
 include/asm-generic/gpio.h |   11 +++++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio.c b/drivers/gpio/gpio.c
index 6ad8d27..cd14e93 100644
--- a/drivers/gpio/gpio.c
+++ b/drivers/gpio/gpio.c
@@ -4,8 +4,6 @@
 
 static LIST_HEAD(chip_list);
 
-#define ARCH_NR_GPIOS 256
-
 static struct gpio_chip *gpio_desc[ARCH_NR_GPIOS];
 
 static int gpio_is_valid(unsigned gpio)
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 1997888..c2e7a5d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -1,6 +1,17 @@
 #ifndef __ASM_GENERIC_GPIO_H
 #define __ASM_GENERIC_GPIO_H
 
+#define ARCH_NR_GPIOS 256
+
+static inline int gpio_is_valid(int gpio)
+{
+	if (gpio < 0)
+		return 0;
+	if (gpio < ARCH_NR_GPIOS)
+		return 1;
+	return 0;
+}
+
 void gpio_set_value(unsigned gpio, int value);
 int gpio_get_value(unsigned gpio);
 int gpio_direction_output(unsigned gpio, int value);
-- 
1.7.10.4