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 - 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
36 - pinctrl-0: Should specify pin control groups used for this controller.
37 - pinctrl-names: Should contain only one value - "default".
40 - wakeup-source: use any event on keypad as wakeup event.
41 (Legacy property supported: "linux,input-wakeup")
43 Optional Properties specific to linux:
44 - linux,keypad-no-autorepeat: do no enable autorepeat feature.
49 compatible = "samsung,s5pv210-keypad";
50 reg = <0x100A0000 0x100>;
52 samsung,keypad-num-rows = <2>;
53 samsung,keypad-num-columns = <8>;
54 linux,input-no-autorepeat;
57 pinctrl-names = "default";
58 pinctrl-0 = <&keypad_rows &keypad_columns>;