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Commit | Line | Data |
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69690bec RS |
1 | NXP LPC32xx Key Scan Interface |
2 | ||
1d0b1c74 SG |
3 | This binding is based on the matrix-keymap binding with the following |
4 | changes: | |
5 | ||
69690bec RS |
6 | Required Properties: |
7 | - compatible: Should be "nxp,lpc3220-key" | |
8 | - reg: Physical base address of the controller and length of memory mapped | |
9 | region. | |
10 | - interrupts: The interrupt number to the cpu. | |
24541ded | 11 | - clocks: phandle to clock controller plus clock-specifier pair |
69690bec RS |
12 | - nxp,debounce-delay-ms: Debounce delay in ms |
13 | - nxp,scan-delay-ms: Repeated scan period in ms | |
14 | - linux,keymap: the key-code to be reported when the key is pressed | |
15 | and released, see also | |
16 | Documentation/devicetree/bindings/input/matrix-keymap.txt | |
17 | ||
1d0b1c74 SG |
18 | Note: keypad,num-rows and keypad,num-columns are required, and must be equal |
19 | since LPC32xx only supports square matrices | |
20 | ||
69690bec RS |
21 | Example: |
22 | ||
23 | key@40050000 { | |
24 | compatible = "nxp,lpc3220-key"; | |
25 | reg = <0x40050000 0x1000>; | |
24541ded VZ |
26 | clocks = <&clk LPC32XX_CLK_KEY>; |
27 | interrupt-parent = <&sic1>; | |
28 | interrupts = <22 IRQ_TYPE_LEVEL_HIGH>; | |
69690bec RS |
29 | keypad,num-rows = <1>; |
30 | keypad,num-columns = <1>; | |
31 | nxp,debounce-delay-ms = <3>; | |
32 | nxp,scan-delay-ms = <34>; | |
33 | linux,keymap = <0x00000002>; | |
34 | }; |