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- clocks: phandle to clock controller plus clock-specifier pair 12- nxp,debounce-delay-ms: Debounce delay in ms 13- nxp,scan-delay-ms: Repeated scan period in ms 14- linux,keymap: the key-code to be reported when the key is pressed 15 and released, see also 16 Documentation/devicetree/bindings/input/matrix-keymap.txt 17 18Note: keypad,num-rows and keypad,num-columns are required, and must be equal 19since LPC32xx only supports square matrices 20 21Example: 22 23 key@40050000 { 24 compatible = "nxp,lpc3220-key"; 25 reg = <0x40050000 0x1000>; 26 clocks = <&clk LPC32XX_CLK_KEY>; 27 interrupt-parent = <&sic1>; 28 interrupts = <22 IRQ_TYPE_LEVEL_HIGH>; 29 keypad,num-rows = <1>; 30 keypad,num-columns = <1>; 31 nxp,debounce-delay-ms = <3>; 32 nxp,scan-delay-ms = <34>; 33 linux,keymap = <0x00000002>; 34 }; 35