[PATCH v4 03/10] dt-bindings: gpio: gpio-axp209: add pinctrl features
From: Quentin Schulz <hidden>
Date: 2017-12-01 13:47:21
Also in:
linux-devicetree, linux-gpio, lkml
Subsystem:
gpio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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 <redacted> Acked-by: Rob Herring <robh@kernel.org> --- 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 at 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
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