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Documentation / devicetree / bindings / input / samsung-keypad.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:01 EST.

1	* Samsung's Keypad Controller device tree bindings
2	
3	Samsung's Keypad controller is used to interface a SoC with a matrix-type
4	keypad device. The keypad controller supports multiple row and column lines.
5	A key can be placed at each intersection of a unique row and a unique column.
6	The keypad controller can sense a key-press and key-release and report the
7	event using a interrupt to the cpu.
8	
9	Required SoC Specific Properties:
10	- compatible: should be one of the following
11	  - "samsung,s3c6410-keypad": For controllers compatible with s3c6410 keypad
12	    controller.
13	  - "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad
14	    controller.
15	
16	- reg: physical base address of the controller and length of memory mapped
17	  region.
18	
19	- interrupts: The interrupt number to the cpu.
20	
21	Required Board Specific Properties:
22	- samsung,keypad-num-rows: Number of row lines connected to the keypad
23	  controller.
24	
25	- samsung,keypad-num-columns: Number of column lines connected to the
26	  keypad controller.
27	
28	- Keys represented as child nodes: Each key connected to the keypad
29	  controller is represented as a child node to the keypad controller
30	  device node and should include the following properties.
31	  - keypad,row: the row number to which the key is connected.
32	  - keypad,column: the column number to which the key is connected.
33	  - linux,code: the key-code to be reported when the key is pressed
34	    and released.
35	
36	- pinctrl-0: Should specify pin control groups used for this controller.
37	- pinctrl-names: Should contain only one value - "default".
38	
39	Optional Properties specific to linux:
40	- linux,keypad-no-autorepeat: do no enable autorepeat feature.
41	- linux,keypad-wakeup: use any event on keypad as wakeup event.
42	
43	
44	Example:
45		keypad@100A0000 {
46			compatible = "samsung,s5pv210-keypad";
47			reg = <0x100A0000 0x100>;
48			interrupts = <173>;
49			samsung,keypad-num-rows = <2>;
50			samsung,keypad-num-columns = <8>;
51			linux,input-no-autorepeat;
52			linux,input-wakeup;
53	
54			pinctrl-names = "default";
55			pinctrl-0 = <&keypad_rows &keypad_columns>;
56	
57			key_1 {
58				keypad,row = <0>;
59				keypad,column = <3>;
60				linux,code = <2>;
61			};
62	
63			key_2 {
64				keypad,row = <0>;
65				keypad,column = <4>;
66				linux,code = <3>;
67			};
68	
69			key_3 {
70				keypad,row = <0>;
71				keypad,column = <5>;
72				linux,code = <4>;
73			};
74		};
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