1NXP LPC32xx Key Scan Interface 2 3This binding is based on the matrix-keymap binding with the following 4changes: 5 6Required Properties: 7- compatible: Should be "nxp,lpc3220-key" 8- reg: Physical base address of the controller and length of memory mapped 9 region. 10- interrupts: The interrupt number to the cpu. 11- nxp,debounce-delay-ms: Debounce delay in ms 12- nxp,scan-delay-ms: Repeated scan period in ms 13- linux,keymap: the key-code to be reported when the key is pressed 14 and released, see also 15 Documentation/devicetree/bindings/input/matrix-keymap.txt 16 17Note: keypad,num-rows and keypad,num-columns are required, and must be equal 18since LPC32xx only supports square matrices 19 20Example: 21 22 key@40050000 { 23 compatible = "nxp,lpc3220-key"; 24 reg = <0x40050000 0x1000>; 25 interrupts = <54 0>; 26 keypad,num-rows = <1>; 27 keypad,num-columns = <1>; 28 nxp,debounce-delay-ms = <3>; 29 nxp,scan-delay-ms = <34>; 30 linux,keymap = <0x00000002>; 31 }; 32