dm: gpio: Enhance gpio command to show only active GPIOs

[u-boot.git] / include / asm-generic / gpio.h

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index a6e52a0de63cd3d535674a140d6d4b4cac966264..60539d8a9d24fc113e9d8f839a9f84244fbe1a23 100644 (file)
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -79,11 +79,15 @@ int gpio_get_value(unsigned gpio);
  */
 int gpio_set_value(unsigned gpio, int value);
 
-/* State of a GPIO, as reported by get_state() */
+/* State of a GPIO, as reported by get_function() */
 enum {
        GPIOF_INPUT = 0,
        GPIOF_OUTPUT,
-       GPIOF_UNKNOWN,
+       GPIOF_UNUSED,           /* Not claimed */
+       GPIOF_UNKNOWN,          /* Not known */
+       GPIOF_FUNC,             /* Not used as a GPIO */
+
+       GPIOF_COUNT,
 };
 
 struct udevice;
@@ -123,6 +127,13 @@ struct dm_gpio_ops {
                                int value);
        int (*get_value)(struct udevice *dev, unsigned offset);
        int (*set_value)(struct udevice *dev, unsigned offset, int value);
+       /**
+        * get_function() Get the GPIO function
+        *
+        * @dev:     Device to check
+        * @offset:  GPIO offset within that device
+        * @return current function - GPIOF_...
+        */
        int (*get_function)(struct udevice *dev, unsigned offset);
        int (*get_state)(struct udevice *dev, unsigned offset, char *state,
                         int maxlen);