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




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:41 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:
40	- wakeup-source: use any event on keypad as wakeup event.
41			 (Legacy property supported: "linux,input-wakeup")
42	
43	Optional Properties specific to linux:
44	- linux,keypad-no-autorepeat: do no enable autorepeat feature.
45	
46	
47	Example:
48		keypad@100A0000 {
49			compatible = "samsung,s5pv210-keypad";
50			reg = <0x100A0000 0x100>;
51			interrupts = <173>;
52			samsung,keypad-num-rows = <2>;
53			samsung,keypad-num-columns = <8>;
54			linux,input-no-autorepeat;
55			wakeup-source;
56	
57			pinctrl-names = "default";
58			pinctrl-0 = <&keypad_rows &keypad_columns>;
59	
60			key_1 {
61				keypad,row = <0>;
62				keypad,column = <3>;
63				linux,code = <2>;
64			};
65	
66			key_2 {
67				keypad,row = <0>;
68				keypad,column = <4>;
69				linux,code = <3>;
70			};
71	
72			key_3 {
73				keypad,row = <0>;
74				keypad,column = <5>;
75				linux,code = <4>;
76			};
77		};
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