NXP LPC32xx Key Scan Interface This binding is based on the matrix-keymap binding with the following changes: Required Properties: - compatible: Should be "nxp,lpc3220-key" - reg: Physical base address of the controller and length of memory mapped region. - interrupts: The interrupt number to the cpu. - nxp,debounce-delay-ms: Debounce delay in ms - nxp,scan-delay-ms: Repeated scan period in ms - linux,keymap: the key-code to be reported when the key is pressed and released, see also Documentation/devicetree/bindings/input/matrix-keymap.txt Note: keypad,num-rows and keypad,num-columns are required, and must be equal since LPC32xx only supports square matrices Example: key@40050000 { compatible = "nxp,lpc3220-key"; reg = <0x40050000 0x1000>; interrupts = <54 0>; keypad,num-rows = <1>; keypad,num-columns = <1>; nxp,debounce-delay-ms = <3>; nxp,scan-delay-ms = <34>; linux,keymap = <0x00000002>; };