From 69690bec400e4c6cc89ef37376da1e633e14ad0f Mon Sep 17 00:00:00 2001 From: Roland Stigge Date: Fri, 13 Jul 2012 00:08:34 -0700 Subject: Input: add support for key scan interface of the LPC32xx SoC This is a driver for the key scan interface of the LPC32xx SoC Signed-off-by: Roland Stigge Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/lpc32xx-key.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/lpc32xx-key.txt (limited to 'Documentation/devicetree/bindings') diff --git a/Documentation/devicetree/bindings/input/lpc32xx-key.txt b/Documentation/devicetree/bindings/input/lpc32xx-key.txt new file mode 100644 index 0000000..31afd50 --- /dev/null +++ b/Documentation/devicetree/bindings/input/lpc32xx-key.txt @@ -0,0 +1,28 @@ +NXP LPC32xx Key Scan Interface + +Required Properties: +- compatible: Should be "nxp,lpc3220-key" +- reg: Physical base address of the controller and length of memory mapped + region. +- interrupts: The interrupt number to the cpu. +- keypad,num-rows: Number of rows and columns, e.g. 1: 1x1, 6: 6x6 +- keypad,num-columns: Must be equal to keypad,num-rows since LPC32xx only + supports square matrices +- nxp,debounce-delay-ms: Debounce delay in ms +- nxp,scan-delay-ms: Repeated scan period in ms +- linux,keymap: the key-code to be reported when the key is pressed + and released, see also + Documentation/devicetree/bindings/input/matrix-keymap.txt + +Example: + + key@40050000 { + compatible = "nxp,lpc3220-key"; + reg = <0x40050000 0x1000>; + interrupts = <54 0>; + keypad,num-rows = <1>; + keypad,num-columns = <1>; + nxp,debounce-delay-ms = <3>; + nxp,scan-delay-ms = <34>; + linux,keymap = <0x00000002>; + }; -- cgit v1.1