tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
2-------------------------------------------------------------------------------
3
4Required properties:
5- compatible: "holtek,ht16k33"
6- reg: I2C slave address of the chip.
7- interrupts: Interrupt specification for the key pressed interrupt.
8- refresh-rate-hz: Display update interval in HZ.
9- debounce-delay-ms: Debouncing interval time in milliseconds.
10- linux,keymap: The keymap for keys as described in the binding
11 document (devicetree/bindings/input/matrix-keymap.txt).
12
13Optional properties:
14- linux,no-autorepeat: Disable keyrepeat.
15- default-brightness-level: Initial brightness level [0-15] (default: 15).
16
17Example:
18
19&i2c1 {
20 ht16k33: ht16k33@70 {
21 compatible = "holtek,ht16k33";
22 reg = <0x70>;
23 refresh-rate-hz = <20>;
24 debounce-delay-ms = <50>;
25 interrupt-parent = <&gpio4>;
26 interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
27 linux,keymap = <
28 MATRIX_KEY(2, 0, KEY_F6)
29 MATRIX_KEY(3, 0, KEY_F8)
30 MATRIX_KEY(4, 0, KEY_F10)
31 MATRIX_KEY(5, 0, KEY_F4)
32 MATRIX_KEY(6, 0, KEY_F2)
33 MATRIX_KEY(2, 1, KEY_F5)
34 MATRIX_KEY(3, 1, KEY_F7)
35 MATRIX_KEY(4, 1, KEY_F9)
36 MATRIX_KEY(5, 1, KEY_F3)
37 MATRIX_KEY(6, 1, KEY_F1)
38 >;
39 };
40};