Zevio GPIO controller Required properties: - compatible: Should be "lsi,zevio-gpio" - reg: Address and length of the register set for the device - #gpio-cells: Should be two. The first cell is the pin number and the second cell is used to specify optional parameters (currently unused). - gpio-controller: Marks the device node as a GPIO controller. Example: gpio: gpio@90000000 { compatible = "lsi,zevio-gpio"; reg = <0x90000000 0x1000>; gpio-controller; #gpio-cells = <2>; };