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34 lines
1.1 KiB
34 lines
1.1 KiB
NXP LPC32xx Key Scan Interface |
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This binding is based on the matrix-keymap binding with the following |
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changes: |
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Required Properties: |
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- compatible: Should be "nxp,lpc3220-key" |
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- reg: Physical base address of the controller and length of memory mapped |
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region. |
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- interrupts: The interrupt number to the cpu. |
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- clocks: phandle to clock controller plus clock-specifier pair |
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- nxp,debounce-delay-ms: Debounce delay in ms |
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- nxp,scan-delay-ms: Repeated scan period in ms |
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- linux,keymap: the key-code to be reported when the key is pressed |
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and released, see also |
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Documentation/devicetree/bindings/input/matrix-keymap.txt |
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Note: keypad,num-rows and keypad,num-columns are required, and must be equal |
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since LPC32xx only supports square matrices |
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Example: |
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key@40050000 { |
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compatible = "nxp,lpc3220-key"; |
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reg = <0x40050000 0x1000>; |
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clocks = <&clk LPC32XX_CLK_KEY>; |
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interrupt-parent = <&sic1>; |
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interrupts = <22 IRQ_TYPE_LEVEL_HIGH>; |
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keypad,num-rows = <1>; |
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keypad,num-columns = <1>; |
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nxp,debounce-delay-ms = <3>; |
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nxp,scan-delay-ms = <34>; |
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linux,keymap = <0x00000002>; |
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};
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