* 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 controller. - "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad controller. - reg: physical base address of the controller and length of memory mapped region. - interrupts: The interrupt number to the cpu. Required Board Specific Properties: - samsung,keypad-num-rows: Number of row lines connected to the keypad controller. - 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. Example: keypad@100a0000 { compatible = "samsung,s5pv210-keypad"; reg = <0x100A0000 0x100>; interrupts = <173>; samsung,keypad-num-rows = <2>; samsung,keypad-num-columns = <8>; linux,input-no-autorepeat; wakeup-source; 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>; }; };