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Commit f17aea43 authored by Quentin Schulz's avatar Quentin Schulz Committed by Linus Walleij
Browse files

dt-bindings: gpio: gpio-axp209: add pinctrl features 



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: default avatarQuentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 23f75d7d

Documentation/devicetree/bindings/gpio/gpio-axp209.txt

+35 −1
Original line number Original line Diff line number Diff line 
AXP209 GPIO controller

AXP209 GPIO & pinctrl controller





This driver follows the usual GPIO bindings found in

This driver follows the usual GPIO bindings found in

Documentation/devicetree/bindings/gpio/gpio.txt

Documentation/devicetree/bindings/gpio/gpio.txt





This driver follows the usual pinctrl bindings found in

Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt



This driver employs the per-pin muxing pattern.



Required properties:

Required properties:

- compatible: Should be "x-powers,axp209-gpio"

- compatible: Should be "x-powers,axp209-gpio"

- #gpio-cells: Should be two. The first cell is the pin number and the

- #gpio-cells: Should be two. The first cell is the pin number and the
@@ -28,3 +33,32 @@ axp209: pmic@34 { 
		#gpio-cells = <2>;

		#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

-------------------------



Each GPIO is independent from the other (i.e. GPIO0 in gpio_in function does

not force GPIO1 and GPIO2 to be in gpio_in function as well).



GPIO	|	Functions

------------------------

GPIO0	|	gpio_in, gpio_out, ldo, adc

GPIO1	|	gpio_in, gpio_out, ldo, adc

GPIO2	|	gpio_in, gpio_out