| Roland Stigge | 69690be | 2012-07-13 00:08:34 -0700 | [diff] [blame^] | 1 | NXP LPC32xx Key Scan Interface |
| 2 | |
| 3 | Required Properties: |
| 4 | - compatible: Should be "nxp,lpc3220-key" |
| 5 | - reg: Physical base address of the controller and length of memory mapped |
| 6 | region. |
| 7 | - interrupts: The interrupt number to the cpu. |
| 8 | - keypad,num-rows: Number of rows and columns, e.g. 1: 1x1, 6: 6x6 |
| 9 | - keypad,num-columns: Must be equal to keypad,num-rows since LPC32xx only |
| 10 | supports square matrices |
| 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 | |
| 17 | Example: |
| 18 | |
| 19 | key@40050000 { |
| 20 | compatible = "nxp,lpc3220-key"; |
| 21 | reg = <0x40050000 0x1000>; |
| 22 | interrupts = <54 0>; |
| 23 | keypad,num-rows = <1>; |
| 24 | keypad,num-columns = <1>; |
| 25 | nxp,debounce-delay-ms = <3>; |
| 26 | nxp,scan-delay-ms = <34>; |
| 27 | linux,keymap = <0x00000002>; |
| 28 | }; |