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@xxxxxxxxx>
---
Cc: barebox@xxxxxxxxxxxxxxxxxxx
---
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
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