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Commit 5b64250b authored by Christian Lamparter's avatar Christian Lamparter Committed by Linus Walleij
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gpio: dt-bindings: add wd,mbl-gpio bindings 



This patch adds the device tree bindings for the Western Digital's
MyBook Live memory-mapped GPIO controllers.

The gpios will be supported by gpio-mmio code of the
GPIO generic library.

Signed-off-by: default avatarChristian Lamparter <chunkeey@googlemail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent fd9c5531

Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt

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Bindings for the Western Digital's MyBook Live memory-mapped GPIO controllers.



The Western Digital MyBook Live has two memory-mapped GPIO controllers.

Both GPIO controller only have a single 8-bit data register, where GPIO

state can be read and/or written.



Required properties:

	- compatible: should be "wd,mbl-gpio"

	- reg-names: must contain

		"dat" - data register

	- reg: address + size pairs describing the GPIO register sets;

		order must correspond with the order of entries in reg-names

	- #gpio-cells: must be set to 2. The first cell is the pin number and

			the second cell is used to specify the gpio polarity:

			0 = active high

			1 = active low

	- gpio-controller: Marks the device node as a gpio controller.



Optional properties:

	- no-output: GPIOs are read-only.



Examples:

	gpio0: gpio0@e0000000 {

		compatible = "wd,mbl-gpio";

		reg-names = "dat";

		reg = <0xe0000000 0x1>;

		#gpio-cells = <2>;

		gpio-controller;

	};



	gpio1: gpio1@e0100000 {

		compatible = "wd,mbl-gpio";

		reg-names = "dat";

		reg = <0xe0100000 0x1>;

		#gpio-cells = <2>;

		gpio-controller;

		no-output;

	};