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Documentation / devicetree / bindings / input / lpc32xx-key.txt




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Based on kernel version 3.9. Page generated on 2013-05-02 22:58 EST.

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	- 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	
17	Note: keypad,num-rows and keypad,num-columns are required, and must be equal
18	since LPC32xx only supports square matrices
19	
20	Example:
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		};
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