gpio: add ops to get dir flags
Add the ops for GPIO driver get_dir_flags(), allows to get dynamically
the current gpio configuration; it is used by the API function
dm_gpio_get_dir_flags().
When these optional ops are absent, the gpio uclass continues to use
the mandatory ops (direction_output, direction_input, get_value) and
value of desc->flags to manage only the main dir flags:
- GPIOD_IS_IN
- GPIOD_IS_OUT
- GPIOD_IS_OUT_ACTIVE
- GPIOD_ACTIVE_LOW
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 42c9ab2..7c1f71b 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -297,6 +297,21 @@
*/
int (*xlate)(struct udevice *dev, struct gpio_desc *desc,
struct ofnode_phandle_args *args);
+
+ /**
+ * get_dir_flags() - Get GPIO dir flags
+ *
+ * This function return the GPIO direction flags used.
+ *
+ * This method is optional.
+ *
+ * @dev: GPIO device
+ * @offset: GPIO offset within that device
+ * @flags: place to put the used direction flags by GPIO
+ * @return 0 if OK, -ve on error
+ */
+ int (*get_dir_flags)(struct udevice *dev, unsigned int offset,
+ ulong *flags);
};
/**