1Axis ETRAX FS General I/O controller bindings 2 3Required properties: 4 5- compatible: one of: 6 - "axis,etraxfs-gio" 7 - "axis,artpec3-gio" 8- reg: Physical base address and length of the controller's registers. 9- #gpio-cells: Should be 3 10 - The first cell is the gpio offset number. 11 - The second cell is reserved and is currently unused. 12 - The third cell is the port number (hex). 13- gpio-controller: Marks the device node as a GPIO controller. 14 15Example: 16 17 gio: gpio@b001a000 { 18 compatible = "axis,etraxfs-gio"; 19 reg = <0xb001a000 0x1000>; 20 gpio-controller; 21 #gpio-cells = <3>; 22 }; 23