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};
41