The X-Powers AXP209 has 3 GPIOs. GPIO0/1 can each act either as a GPIO,
an ADC or a LDO regulator. GPIO2 can only act as a GPIO.
This adds the pinctrl features to the driver so GPIO0/1 can be used as
ADC or LDO regulator.
Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
Documentation/devicetree/bindings/gpio/gpio-axp209.txt | 28 ++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/gpio/gpio-axp209.txt b/Documentation/devicetree/bindings/gpio/gpio-axp209.txt
index a661130..4705020 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-axp209.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-axp209.txt
@@ -1,4 +1,4 @@
-AXP209 GPIO controller
+AXP209 GPIO & pinctrl controller
This driver follows the usual GPIO bindings found in
Documentation/devicetree/bindings/gpio/gpio.txt
@@ -28,3 +28,29 @@ axp209: pmic@34 {
#gpio-cells = <2>;
};
};
+
+The GPIOs can be muxed to other functions and therefore, must be a subnode of
+axp_gpio.
+
+Example:
+
+&axp_gpio {
+ gpio0_adc: gpio0-adc {
+ pins = "GPIO0";
+ function = "adc";
+ };
+};
+
+&example_node {
+ pinctrl-names = "default";
+ pinctrl-0 = <&gpio0_adc>;
+};
+
+GPIOs and their functions
+-------------------------
+
+GPIO | Functions
+------------------------
+GPIO0 | gpio_in, gpio_out, ldo, adc
+GPIO1 | gpio_in, gpio_out, ldo, adc
+GPIO2 | gpio_in, gpio_out
--
git-series 0.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
