1 * TWL4030's Keypad Controller device tree bind 1 * TWL4030's Keypad Controller device tree bindings
2 2
3 TWL4030's Keypad controller is used to interfa 3 TWL4030'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 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,twl4030-keypad": For controllers comp 16 - "ti,twl4030-keypad": For controllers compatible with twl4030 keypad
17 controller. 17 controller.
18 - interrupt: should be one of the following 18 - interrupt: should be one of the following
19 - <1>: For controllers compatible with twl4 19 - <1>: For controllers compatible with twl4030 keypad controller.
20 20
21 Example: 21 Example:
22 twl_keypad: keypad { 22 twl_keypad: keypad {
23 compatible = "ti,twl4030-keypa 23 compatible = "ti,twl4030-keypad";
24 interrupts = <1>; 24 interrupts = <1>;
25 keypad,num-rows = <8>; 25 keypad,num-rows = <8>;
26 keypad,num-columns = <8>; 26 keypad,num-columns = <8>;
27 }; 27 };
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