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Diffstat (limited to 'dts/Bindings/input/lpc32xx-key.txt')
| -rw-r--r-- | dts/Bindings/input/lpc32xx-key.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/dts/Bindings/input/lpc32xx-key.txt b/dts/Bindings/input/lpc32xx-key.txt new file mode 100644 index 0000000000..bcf62f8563 --- /dev/null +++ b/dts/Bindings/input/lpc32xx-key.txt @@ -0,0 +1,31 @@ +NXP LPC32xx Key Scan Interface + +This binding is based on the matrix-keymap binding with the following +changes: + +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. +- 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 + +Note: keypad,num-rows and keypad,num-columns are required, and must be equal +since LPC32xx only supports square matrices + +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>; + }; |