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Commit 7fff7d9b authored by Thor Thayer's avatar Thor Thayer Committed by Lee Jones
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dt-bindings: mfd: Add Altera Arria10 System Resource Chip bindings 



The Altera Arria10 Devkit System Resource chip is a Multi-Function
Device with a GPIO expander.

This patch adds documentation for the Altera A10-SR DT bindings.

Signed-off-by: default avatarThor Thayer <tthayer@opensource.altera.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent b7c50053

Documentation/devicetree/bindings/mfd/altera-a10sr.txt

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* Altera Arria10 Development Kit System Resource Chip



Required parent device properties:

- compatible		: "altr,a10sr"

- spi-max-frequency	: Maximum SPI frequency.

- reg			: The SPI Chip Select address for the Arria10

			  System Resource chip

- interrupt-parent	: The parent interrupt controller.

- interrupts		: The interrupt line the device is connected to.

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

- #interrupt-cells	: The number of cells to describe an IRQ, should be 2.

			    The first cell is the IRQ number.

			    The second cell is the flags, encoded as trigger

			    masks from ../interrupt-controller/interrupts.txt.



The A10SR consists of these sub-devices:



Device                   Description

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

a10sr_gpio               GPIO Controller



Arria10 GPIO

Required Properties:

- compatible        : Should be "altr,a10sr-gpio"

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

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

                      the second cell is used to specify flags.

                      See ../gpio/gpio.txt for more information.



Example:



        resource-manager@0 {

		compatible = "altr,a10sr";

		reg = <0>;

		spi-max-frequency = <100000>;

		interrupt-parent = <&portb>;

		interrupts = <5 IRQ_TYPE_LEVEL_LOW>;

		interrupt-controller;

		#interrupt-cells = <2>;



		a10sr_gpio: gpio-controller {

			compatible = "altr,a10sr-gpio";

			gpio-controller;

			#gpio-cells = <2>;

		};

	};