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Commit c910d6ad authored by Baolin Wang's avatar Baolin Wang Committed by Linus Walleij
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dt-bindings: gpio: Add Spreadtrum GPIO controller documentation 



This patch adds the device tree bindings for the Spreadtrum
GPIO controller. The gpios will be supported by the GPIO
generic library.

Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7ed91505

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

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Spreadtrum GPIO controller bindings



The controller's registers are organized as sets of sixteen 16-bit

registers with each set controlling a bank of up to 16 pins. A single

interrupt is shared for all of the banks handled by the controller.



Required properties:

- compatible: Should be "sprd,sc9860-gpio".

- reg: Define the base and range of the I/O address space containing

the GPIO controller registers.

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

- #gpio-cells: Should be <2>. The first cell is the gpio number and

the second cell is used to specify optional parameters.

- interrupt-controller: Marks the device node as an interrupt controller.

- #interrupt-cells: Should be <2>. Specifies the number of cells needed

to encode interrupt source.

- interrupts: Should be the port interrupt shared by all the gpios.



Example:

	ap_gpio: gpio@40280000 {

		compatible = "sprd,sc9860-gpio";

		reg = <0 0x40280000 0 0x1000>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

		interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;

	};