Merge tag 'rproc-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson...
[linux-2.6-microblaze.git] / Documentation / devicetree / bindings / input / lpc32xx-key.txt
1 NXP LPC32xx Key Scan Interface
2
3 This binding is based on the matrix-keymap binding with the following
4 changes:
5
6 Required 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
18 Note: keypad,num-rows and keypad,num-columns are required, and must be equal
19 since LPC32xx only supports square matrices
20
21 Example:
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         };