projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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. | |
| 69690bec RS |
11 | - nxp,debounce-delay-ms: Debounce delay in ms |
| 12 | - nxp,scan-delay-ms: Repeated scan period in ms | |
| 13 | - linux,keymap: the key-code to be reported when the key is pressed | |
| 14 | and released, see also | |
| 15 | Documentation/devicetree/bindings/input/matrix-keymap.txt | |
| 16 | ||
| 1d0b1c74 SG |
17 | Note: keypad,num-rows and keypad,num-columns are required, and must be equal |
| 18 | since LPC32xx only supports square matrices | |
| 19 | ||
| 69690bec RS |
20 | Example: |
| 21 | ||
| 22 | key@40050000 { | |
| 23 | compatible = "nxp,lpc3220-key"; | |
| 24 | reg = <0x40050000 0x1000>; | |
| 25 | interrupts = <54 0>; | |
| 26 | keypad,num-rows = <1>; | |
| 27 | keypad,num-columns = <1>; | |
| 28 | nxp,debounce-delay-ms = <3>; | |
| 29 | nxp,scan-delay-ms = <34>; | |
| 30 | linux,keymap = <0x00000002>; | |
| 31 | }; |