1 * Samsung's Keypad Controller device tree bindings
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.
9 Required SoC Specific Properties:
10 - compatible: should be one of the following
11 - "samsung,s3c6410-keypad": For controllers compatible with s3c6410 keypad
13 - "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad
16 - reg: physical base address of the controller and length of memory mapped
19 - interrupts: The interrupt number to the cpu.
21 Required Board Specific Properties:
22 - samsung,keypad-num-rows: Number of row lines connected to the keypad
25 - samsung,keypad-num-columns: Number of column lines connected to the
28 - row-gpios: List of gpios used as row lines. The gpio specifier for
29 this property depends on the gpio controller to which these row lines
32 - col-gpios: List of gpios used as column lines. The gpio specifier for
33 this property depends on the gpio controller to which these column
36 - Keys represented as child nodes: Each key connected to the keypad
37 controller is represented as a child node to the keypad controller
38 device node and should include the following properties.
39 - keypad,row: the row number to which the key is connected.
40 - keypad,column: the column number to which the key is connected.
41 - linux,code: the key-code to be reported when the key is pressed
44 Optional Properties specific to linux:
45 - linux,keypad-no-autorepeat: do no enable autorepeat feature.
46 - linux,keypad-wakeup: use any event on keypad as wakeup event.
51 compatible = "samsung,s5pv210-keypad";
52 reg = <0x100A0000 0x100>;
54 samsung,keypad-num-rows = <2>;
55 samsung,keypad-num-columns = <8>;
56 linux,input-no-autorepeat;
59 row-gpios = <&gpx2 0 3 3 0
62 col-gpios = <&gpx1 0 3 0 0