| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | TI-NSPIRE Keypad |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Compatible property value should be "ti,nspire-keypad". |
| 5 | |
| 6 | - reg: Physical base address of the peripheral and length of memory mapped |
| 7 | region. |
| 8 | |
| 9 | - interrupts: The interrupt number for the peripheral. |
| 10 | |
| 11 | - scan-interval: How often to scan in us. Based on a APB speed of 33MHz, the |
| 12 | maximum and minimum delay time is ~2000us and ~500us respectively |
| 13 | |
| 14 | - row-delay: How long to wait before scanning each row. |
| 15 | |
| 16 | - clocks: The clock this peripheral is attached to. |
| 17 | |
| 18 | - linux,keymap: The keymap to use |
| 19 | (see Documentation/devicetree/bindings/input/matrix-keymap.txt) |
| 20 | |
| 21 | Optional properties: |
| 22 | - active-low: Specify that the keypad is active low (i.e. logical low signifies |
| 23 | a key press). |
| 24 | |
| 25 | Example: |
| 26 | |
| 27 | input { |
| 28 | compatible = "ti,nspire-keypad"; |
| 29 | reg = <0x900E0000 0x1000>; |
| 30 | interrupts = <16>; |
| 31 | |
| 32 | scan-interval = <1000>; |
| 33 | row-delay = <200>; |
| 34 | |
| 35 | clocks = <&apb_pclk>; |
| 36 | |
| 37 | linux,keymap = < |
| 38 | 0x0000001c 0x0001001c 0x00040039 |
| 39 | 0x0005002c 0x00060015 0x0007000b |
| 40 | 0x0008000f 0x0100002d 0x01010011 |
| 41 | 0x0102002f 0x01030004 0x01040016 |
| 42 | 0x01050014 0x0106001f 0x01070002 |
| 43 | 0x010a006a 0x02000013 0x02010010 |
| 44 | 0x02020019 0x02030007 0x02040018 |
| 45 | 0x02050031 0x02060032 0x02070005 |
| 46 | 0x02080028 0x0209006c 0x03000026 |
| 47 | 0x03010025 0x03020024 0x0303000a |
| 48 | 0x03040017 0x03050023 0x03060022 |
| 49 | 0x03070008 0x03080035 0x03090069 |
| 50 | 0x04000021 0x04010012 0x04020020 |
| 51 | 0x0404002e 0x04050030 0x0406001e |
| 52 | 0x0407000d 0x04080037 0x04090067 |
| 53 | 0x05010038 0x0502000c 0x0503001b |
| 54 | 0x05040034 0x0505001a 0x05060006 |
| 55 | 0x05080027 0x0509000e 0x050a006f |
| 56 | 0x0600002b 0x0602004e 0x06030068 |
| 57 | 0x06040003 0x0605006d 0x06060009 |
| 58 | 0x06070001 0x0609000f 0x0708002a |
| 59 | 0x0709001d 0x070a0033 >; |
| 60 | }; |