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 details) - 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 Example: gpio@1e780000 { #gpio-cells = <2>; compatible = "aspeed,ast2400-gpio"; gpio-controller; interrupts = <20>; reg = <0x1e780000 0x1000>; interrupt-controller; };