1 Aspeed GPIO controller Device Tree Bindings
2 -------------------------------------------
3
4 Required 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
19 Optional 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
25 The gpio and interrupt properties are further described in their respective
26 bindings 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 };
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