0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/auxdisplay/holtek,ht16k33.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Holtek HT16K33 RAM mapping 16*8 LED controller with keyscan
0008
0009 maintainers:
0010 - Robin van der Gracht <robin@protonic.nl>
0011
0012 allOf:
0013 - $ref: "/schemas/input/matrix-keymap.yaml#"
0014
0015 properties:
0016 compatible:
0017 oneOf:
0018 - items:
0019 - enum:
0020 - adafruit,3108 # 0.56" 4-Digit 7-Segment FeatherWing Display (Red)
0021 - adafruit,3130 # 0.54" Quad Alphanumeric FeatherWing Display (Red)
0022 - const: holtek,ht16k33
0023
0024 - const: holtek,ht16k33 # Generic 16*8 LED controller with dot-matrix display
0025
0026 reg:
0027 maxItems: 1
0028
0029 refresh-rate-hz:
0030 maxItems: 1
0031 description: Display update interval in Hertz for dot-matrix displays
0032
0033 interrupts:
0034 maxItems: 1
0035
0036 debounce-delay-ms:
0037 maxItems: 1
0038 description: Debouncing interval time in milliseconds
0039
0040 linux,keymap: true
0041
0042 linux,no-autorepeat:
0043 description: Disable keyrepeat
0044
0045 default-brightness-level:
0046 minimum: 1
0047 maximum: 16
0048 default: 16
0049 description: Initial brightness level
0050
0051 led:
0052 type: object
0053 $ref: /schemas/leds/common.yaml#
0054 unevaluatedProperties: false
0055
0056 required:
0057 - compatible
0058 - reg
0059
0060 if:
0061 properties:
0062 compatible:
0063 const: holtek,ht16k33
0064 then:
0065 required:
0066 - refresh-rate-hz
0067
0068 additionalProperties: false
0069
0070 examples:
0071 - |
0072 #include <dt-bindings/interrupt-controller/irq.h>
0073 #include <dt-bindings/input/input.h>
0074 #include <dt-bindings/leds/common.h>
0075 i2c1 {
0076 #address-cells = <1>;
0077 #size-cells = <0>;
0078
0079 ht16k33: ht16k33@70 {
0080 compatible = "holtek,ht16k33";
0081 reg = <0x70>;
0082 refresh-rate-hz = <20>;
0083 interrupt-parent = <&gpio4>;
0084 interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
0085 debounce-delay-ms = <50>;
0086 linux,keymap = <MATRIX_KEY(2, 0, KEY_F6)>,
0087 <MATRIX_KEY(3, 0, KEY_F8)>,
0088 <MATRIX_KEY(4, 0, KEY_F10)>,
0089 <MATRIX_KEY(5, 0, KEY_F4)>,
0090 <MATRIX_KEY(6, 0, KEY_F2)>,
0091 <MATRIX_KEY(2, 1, KEY_F5)>,
0092 <MATRIX_KEY(3, 1, KEY_F7)>,
0093 <MATRIX_KEY(4, 1, KEY_F9)>,
0094 <MATRIX_KEY(5, 1, KEY_F3)>,
0095 <MATRIX_KEY(6, 1, KEY_F1)>;
0096
0097 led {
0098 color = <LED_COLOR_ID_RED>;
0099 function = LED_FUNCTION_BACKLIGHT;
0100 linux,default-trigger = "backlight";
0101 };
0102 };
0103 };
