1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/auxdisplay/holtek,ht16k33.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Holtek HT16K33 RAM mapping 16*8 LED controller with keyscan
8
9 maintainers:
10 - Robin van der Gracht <robin@protonic.nl>
11
12 allOf:
13 - $ref: /schemas/input/matrix-keymap.yaml#
14
15 properties:
16 compatible:
17 oneOf:
18 - items:
19 - enum:
20 - adafruit,3108 # 0.56" 4-Digit 7-Segment FeatherWing Display (Red)
21 - adafruit,3130 # 0.54" Quad Alphanumeric FeatherWing Display (Red)
22 - const: holtek,ht16k33
23
24 - const: holtek,ht16k33 # Generic 16*8 LED controller with dot-matrix display
25
26 reg:
27 maxItems: 1
28
29 refresh-rate-hz:
30 maxItems: 1
31 description: Display update interval in Hertz for dot-matrix displays
32
33 interrupts:
34 maxItems: 1
35
36 debounce-delay-ms:
37 maxItems: 1
38 description: Debouncing interval time in milliseconds
39
40 linux,keymap: true
41
42 linux,no-autorepeat:
43 type: boolean
44 description: Disable keyrepeat
45
46 default-brightness-level:
47 minimum: 1
48 maximum: 16
49 default: 16
50 description: Initial brightness level
51
52 led:
53 type: object
54 $ref: /schemas/leds/common.yaml#
55 unevaluatedProperties: false
56
57 required:
58 - compatible
59 - reg
60
61 if:
62 properties:
63 compatible:
64 const: holtek,ht16k33
65 then:
66 required:
67 - refresh-rate-hz
68
69 additionalProperties: false
70
71 examples:
72 - |
73 #include <dt-bindings/interrupt-controller/irq.h>
74 #include <dt-bindings/input/input.h>
75 #include <dt-bindings/leds/common.h>
76 i2c {
77 #address-cells = <1>;
78 #size-cells = <0>;
79
80 display-controller@70 {
81 compatible = "holtek,ht16k33";
82 reg = <0x70>;
83 refresh-rate-hz = <20>;
84 interrupt-parent = <&gpio4>;
85 interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
86 debounce-delay-ms = <50>;
87 linux,keymap = <MATRIX_KEY(2, 0, KEY_F6)>,
88 <MATRIX_KEY(3, 0, KEY_F8)>,
89 <MATRIX_KEY(4, 0, KEY_F10)>,
90 <MATRIX_KEY(5, 0, KEY_F4)>,
91 <MATRIX_KEY(6, 0, KEY_F2)>,
92 <MATRIX_KEY(2, 1, KEY_F5)>,
93 <MATRIX_KEY(3, 1, KEY_F7)>,
94 <MATRIX_KEY(4, 1, KEY_F9)>,
95 <MATRIX_KEY(5, 1, KEY_F3)>,
96 <MATRIX_KEY(6, 1, KEY_F1)>;
97
98 led {
99 color = <LED_COLOR_ID_RED>;
100 function = LED_FUNCTION_BACKLIGHT;
101 linux,default-trigger = "backlight";
102 };
103 };
104 };
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