summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/display/ht16k33.txt
blob: d5a8b070b46779a410062a624ba9af0b498aaf18 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
-------------------------------------------------------------------------------

Required properties:
- compatible:		"holtek,ht16k33"
- reg:			I2C slave address of the chip.
- interrupts:		Interrupt specification for the key pressed interrupt.
- refresh-rate-hz:	Display update interval in HZ.
- debounce-delay-ms:	Debouncing interval time in milliseconds.
- linux,keymap: 	The keymap for keys as described in the binding
			document (devicetree/bindings/input/matrix-keymap.txt).

Optional properties:
- linux,no-autorepeat:	Disable keyrepeat.
- default-brightness-level: Initial brightness level [0-15] (default: 15).

Example:

&i2c1 {
	ht16k33: ht16k33@70 {
		compatible = "holtek,ht16k33";
		reg = <0x70>;
		refresh-rate-hz = <20>;
		debounce-delay-ms = <50>;
		interrupt-parent = <&gpio4>;
		interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
		linux,keymap = <
			MATRIX_KEY(2, 0, KEY_F6)
			MATRIX_KEY(3, 0, KEY_F8)
			MATRIX_KEY(4, 0, KEY_F10)
			MATRIX_KEY(5, 0, KEY_F4)
			MATRIX_KEY(6, 0, KEY_F2)
			MATRIX_KEY(2, 1, KEY_F5)
			MATRIX_KEY(3, 1, KEY_F7)
			MATRIX_KEY(4, 1, KEY_F9)
			MATRIX_KEY(5, 1, KEY_F3)
			MATRIX_KEY(6, 1, KEY_F1)
		>;
	};
};