gpio: add ops to set dir flags
Add the ops for GPIO driver set_dir_flags() to set the dir flags.
The user can update the direction and configuration
of each GPIO with a only call to dm_gpio_set_dir_flags() or
dm_gpio_set_dir() and respecting the configuration provided by
device tree (saved in desc->flags).
When these optional ops are absent, the gpio uclass use the mandatory
ops (direction_output, direction_input, get_value) and 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 7c1f71b..859f41a 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -299,6 +299,22 @@
struct ofnode_phandle_args *args);
/**
+ * set_dir_flags() - Set GPIO dir flags
+ *
+ * This function should set up the GPIO configuration according to the
+ * information provide by the direction flags bitfield.
+ *
+ * This method is optional.
+ *
+ * @dev: GPIO device
+ * @offset: GPIO offset within that device
+ * @flags: GPIO configuration to use
+ * @return 0 if OK, -ve on error
+ */
+ int (*set_dir_flags)(struct udevice *dev, unsigned int offset,
+ ulong flags);
+
+ /**
* get_dir_flags() - Get GPIO dir flags
*
* This function return the GPIO direction flags used.