blob: 4c5c0a82586d406174d1bda200b2101b32caca61 [file] [log] [blame]
* Samsung's Keypad Controller device tree bindings
Samsung's Keypad controller is used to interface a SoC with a matrix-type
keypad device. The keypad controller supports multiple row and column lines.
A key can be placed at each intersection of a unique row and a unique column.
The keypad controller can sense a key-press and key-release and report the
event using a interrupt to the cpu.
Required SoC Specific Properties:
- compatible: should be one of the following
- "samsung,s3c6410-keypad": For controllers compatible with s3c6410 keypad
- "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad
- reg: physical base address of the controller and length of memory mapped
- interrupts: The interrupt number to the cpu.
Required Board Specific Properties:
- samsung,keypad-num-rows: Number of row lines connected to the keypad
- samsung,keypad-num-columns: Number of column lines connected to the
keypad controller.
- Keys represented as child nodes: Each key connected to the keypad
controller is represented as a child node to the keypad controller
device node and should include the following properties.
- keypad,row: the row number to which the key is connected.
- keypad,column: the column number to which the key is connected.
- linux,code: the key-code to be reported when the key is pressed
and released.
- pinctrl-0: Should specify pin control groups used for this controller.
- pinctrl-names: Should contain only one value - "default".
Optional Properties:
- wakeup-source: use any event on keypad as wakeup event.
(Legacy property supported: "linux,input-wakeup")
Optional Properties specific to linux:
- linux,keypad-no-autorepeat: do no enable autorepeat feature.
keypad@100a0000 {
compatible = "samsung,s5pv210-keypad";
reg = <0x100A0000 0x100>;
interrupts = <173>;
samsung,keypad-num-rows = <2>;
samsung,keypad-num-columns = <8>;
pinctrl-names = "default";
pinctrl-0 = <&keypad_rows &keypad_columns>;
key_1 {
keypad,row = <0>;
keypad,column = <3>;
linux,code = <2>;
key_2 {
keypad,row = <0>;
keypad,column = <4>;
linux,code = <3>;
key_3 {
keypad,row = <0>;
keypad,column = <5>;
linux,code = <4>;