Kernel-3.10.0-957.el7_lpc32xx-key

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>;
};