1 * TI's Keypad Controller device tree bindings 1 * TI's Keypad Controller device tree bindings
2 2
3 TI's Keypad controller is used to interface a 3 TI's Keypad controller is used to interface a SoC with a matrix-type
4 keypad device. The keypad controller supports 4 keypad device. The keypad controller supports multiple row and column lines.
5 A key can be placed at each intersection of a 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 an 6 The keypad controller can sense a key-press and key-release and report the
7 event using a interrupt to the cpu. 7 event using a interrupt to the cpu.
8 8
9 This binding is based on the matrix-keymap bin 9 This binding is based on the matrix-keymap binding with the following
10 changes: 10 changes:
11 11
12 keypad,num-rows and keypad,num-columns are req 12 keypad,num-rows and keypad,num-columns are required.
13 13
14 Required SoC Specific Properties: 14 Required SoC Specific Properties:
15 - compatible: should be one of the following 15 - compatible: should be one of the following
16 - "ti,omap4-keypad": For controllers compat 16 - "ti,omap4-keypad": For controllers compatible with omap4 keypad
17 controller. 17 controller.
18 18
19 Optional Properties specific to linux: 19 Optional Properties specific to linux:
20 - linux,keypad-no-autorepeat: do no enable aut 20 - linux,keypad-no-autorepeat: do no enable autorepeat feature.
21 21
22 Example: 22 Example:
23 keypad@4ae1c000{ 23 keypad@4ae1c000{
24 compatible = "ti,omap4-keypad" 24 compatible = "ti,omap4-keypad";
25 keypad,num-rows = <2>; 25 keypad,num-rows = <2>;
26 keypad,num-columns = <8>; 26 keypad,num-columns = <8>;
27 linux,keypad-no-autorepeat; 27 linux,keypad-no-autorepeat;
28 }; 28 };
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