| NXP LPC32xx Key Scan Interface |
| |
| 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. |
| - keypad,num-rows: Number of rows and columns, e.g. 1: 1x1, 6: 6x6 |
| - keypad,num-columns: Must be equal to keypad,num-rows since LPC32xx only |
| supports square matrices |
| - 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 |
| |
| 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>; |
| }; |
