Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
26308 views
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
    };

105


106