1Aspeed GPIO controller Device Tree Bindings
2-------------------------------------------
3
4Required properties:
5- compatible		: Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio",
6					or "aspeed,ast2600-gpio".
7
8- #gpio-cells 		: Should be two
9			  - First cell is the GPIO line number
10			  - Second cell is used to specify optional
11			    parameters (unused)
12
13- reg			: Address and length of the register set for the device
14- gpio-controller	: Marks the device node as a GPIO controller.
15- interrupts		: Interrupt specifier (see interrupt bindings for
16			  details)
17- interrupt-controller	: Mark the GPIO controller as an interrupt-controller
18
19Optional properties:
20
21- clocks		: A phandle to the clock to use for debounce timings
22- ngpios		: Number of GPIOs controlled by this controller. Should	be set
23				  when there are multiple GPIO controllers on a SoC (ast2600).
24
25The gpio and interrupt properties are further described in their respective
26bindings documentation:
27
28- Documentation/devicetree/bindings/gpio/gpio.txt
29- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
30
31  Example:
32	gpio@1e780000 {
33		#gpio-cells = <2>;
34		compatible = "aspeed,ast2400-gpio";
35		gpio-controller;
36		interrupts = <20>;
37		reg = <0x1e780000 0x1000>;
38		interrupt-controller;
39	};
40