| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * ST Keyscan controller Device Tree bindings |
| 2 | |
| 3 | The ST keyscan controller Device Tree binding is based on the |
| 4 | matrix-keymap. |
| 5 | |
| 6 | Required properties: |
| 7 | - compatible: "st,sti-keyscan" |
| 8 | |
| 9 | - reg: Register base address and size of st-keyscan controller. |
| 10 | |
| 11 | - interrupts: Interrupt number for the st-keyscan controller. |
| 12 | |
| 13 | - clocks: Must contain one entry, for the module clock. |
| 14 | See ../clocks/clock-bindings.txt for details. |
| 15 | |
| 16 | - pinctrl: Should specify pin control groups used for this controller. |
| 17 | See ../pinctrl/pinctrl-bindings.txt for details. |
| 18 | |
| 19 | - linux,keymap: The keymap for keys as described in the binding document |
| 20 | devicetree/bindings/input/matrix-keymap.txt. |
| 21 | |
| 22 | - keypad,num-rows: Number of row lines connected to the keypad controller. |
| 23 | |
| 24 | - keypad,num-columns: Number of column lines connected to the keypad |
| 25 | controller. |
| 26 | |
| 27 | Optional property: |
| 28 | - st,debounce_us: Debouncing interval time in microseconds |
| 29 | |
| 30 | Example: |
| 31 | |
| 32 | keyscan: keyscan@fe4b0000 { |
| 33 | compatible = "st,sti-keyscan"; |
| 34 | reg = <0xfe4b0000 0x2000>; |
| 35 | interrupts = <GIC_SPI 212 IRQ_TYPE_NONE>; |
| 36 | clocks = <&CLK_SYSIN>; |
| 37 | pinctrl-names = "default"; |
| 38 | pinctrl-0 = <&pinctrl_keyscan>; |
| 39 | |
| 40 | keypad,num-rows = <4>; |
| 41 | keypad,num-columns = <4>; |
| 42 | st,debounce_us = <5000>; |
| 43 | |
| 44 | linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_F13) |
| 45 | MATRIX_KEY(0x00, 0x01, KEY_F9) |
| 46 | MATRIX_KEY(0x00, 0x02, KEY_F5) |
| 47 | MATRIX_KEY(0x00, 0x03, KEY_F1) |
| 48 | MATRIX_KEY(0x01, 0x00, KEY_F14) |
| 49 | MATRIX_KEY(0x01, 0x01, KEY_F10) |
| 50 | MATRIX_KEY(0x01, 0x02, KEY_F6) |
| 51 | MATRIX_KEY(0x01, 0x03, KEY_F2) |
| 52 | MATRIX_KEY(0x02, 0x00, KEY_F15) |
| 53 | MATRIX_KEY(0x02, 0x01, KEY_F11) |
| 54 | MATRIX_KEY(0x02, 0x02, KEY_F7) |
| 55 | MATRIX_KEY(0x02, 0x03, KEY_F3) |
| 56 | MATRIX_KEY(0x03, 0x00, KEY_F16) |
| 57 | MATRIX_KEY(0x03, 0x01, KEY_F12) |
| 58 | MATRIX_KEY(0x03, 0x02, KEY_F8) |
| 59 | MATRIX_KEY(0x03, 0x03, KEY_F4) >; |
| 60 | }; |