gpio: support gpio set/get pull status
On some platform gpio can set/get pull status when input, add these
function so we can set/get gpio pull status when need it. And they are
optional function.
diff --git a/include/drivers/gpio.h b/include/drivers/gpio.h
index a5cb5c7..633b3f6 100644
--- a/include/drivers/gpio.h
+++ b/include/drivers/gpio.h
@@ -37,17 +37,25 @@
#define GPIO_LEVEL_LOW 0
#define GPIO_LEVEL_HIGH 1
+#define GPIO_PULL_NONE 0
+#define GPIO_PULL_UP 1
+#define GPIO_PULL_DOWN 2
+
typedef struct gpio_ops {
int (*get_direction)(int gpio);
void (*set_direction)(int gpio, int direction);
int (*get_value)(int gpio);
void (*set_value)(int gpio, int value);
+ void (*set_pull)(int gpio, int pull);
+ int (*get_pull)(int gpio);
} gpio_ops_t;
int gpio_get_direction(int gpio);
void gpio_set_direction(int gpio, int direction);
int gpio_get_value(int gpio);
void gpio_set_value(int gpio, int value);
+void gpio_set_pull(int gpio, int pull);
+int gpio_get_pull(int gpio);
void gpio_init(const gpio_ops_t *ops);
#endif /* __GPIO_H__ */