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Aspeed GPIO controller Device Tree Bindings
Required properties:
- compatible : Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio",
or "aspeed,ast2600-gpio".
- #gpio-cells : Should be two
- First cell is the GPIO line number
- Second cell is used to specify optional
parameters (unused)
- reg : Address and length of the register set for the device
- gpio-controller : Marks the device node as a GPIO controller.
- interrupts : Interrupt specifier (see interrupt bindings for
- interrupt-controller : Mark the GPIO controller as an interrupt-controller
Optional properties:
- clocks : A phandle to the clock to use for debounce timings
- ngpios : Number of GPIOs controlled by this controller. Should be set
when there are multiple GPIO controllers on a SoC (ast2600).
The gpio and interrupt properties are further described in their respective
bindings documentation:
- Documentation/devicetree/bindings/gpio/gpio.txt
- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
gpio@1e780000 {
#gpio-cells = <2>;
compatible = "aspeed,ast2400-gpio";
interrupts = <20>;
reg = <0x1e780000 0x1000>;