[PATCH 2/4] gpiolib: add get_direction callback

[Sebastian Hesselbarth]

At least for debugging purposes it is helpful to determine the current
direction for a given GPIO. Add a callback to gpiochip, to allow to
get it.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
---
Cc: barebox at lists.infradead.org
---
 include/gpio.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/gpio.h b/include/gpio.h
index 140d53c..708b2aa 100644
--- a/include/gpio.h
+++ b/include/gpio.h
@@ -3,6 +3,9 @@
 
 #include <asm/gpio.h>
 
+#define GPIO_DIR_OUT	(0 << 0)
+#define GPIO_DIR_IN	(1 << 0)
+
 #ifndef CONFIG_GPIOLIB
 static inline int gpio_request(unsigned gpio, const char *label)
 {
@@ -24,6 +27,7 @@ struct gpio_ops {
 	void (*free)(struct gpio_chip *chip, unsigned offset);
 	int (*direction_input)(struct gpio_chip *chip, unsigned offset);
 	int (*direction_output)(struct gpio_chip *chip, unsigned offset, int value);
+	int (*get_direction)(struct gpio_chip *chip, unsigned offset);
 	int (*get)(struct gpio_chip *chip, unsigned offset);
 	void (*set)(struct gpio_chip *chip, unsigned offset, int value);
 };
-- 
1.8.4.rc3