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author | Roland Stigge <stigge@antcom.de> | 2012-07-13 00:08:34 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-17 23:16:16 -0700 |
commit | 69690bec400e4c6cc89ef37376da1e633e14ad0f (patch) | |
tree | 2f2844e2f9f03d5ad8974b90ab087715787ac845 /Documentation/devicetree/bindings/input/lpc32xx-key.txt | |
parent | 13987435cc28eab6e562e878e71b521e7ef5c860 (diff) | |
download | linux-69690bec400e4c6cc89ef37376da1e633e14ad0f.tar.bz2 |
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 <stigge@antcom.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/input/lpc32xx-key.txt')
-rw-r--r-- | Documentation/devicetree/bindings/input/lpc32xx-key.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/lpc32xx-key.txt b/Documentation/devicetree/bindings/input/lpc32xx-key.txt new file mode 100644 index 000000000000..31afd5014c48 --- /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>; + }; |