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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/auxdisplay/holtek,ht16k33.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Holtek HT16K33 RAM mapping 16*8 LED controller with keyscan8 9maintainers:10 - Robin van der Gracht <robin@protonic.nl>11 12allOf:13 - $ref: /schemas/input/matrix-keymap.yaml#14 15properties: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,ht16k3323 24 - const: holtek,ht16k33 # Generic 16*8 LED controller with dot-matrix display25 26 reg:27 maxItems: 128 29 refresh-rate-hz:30 maxItems: 131 description: Display update interval in Hertz for dot-matrix displays32 33 interrupts:34 maxItems: 135 36 debounce-delay-ms:37 maxItems: 138 description: Debouncing interval time in milliseconds39 40 linux,keymap: true41 42 linux,no-autorepeat:43 type: boolean44 description: Disable keyrepeat45 46 default-brightness-level:47 minimum: 148 maximum: 1649 default: 1650 description: Initial brightness level51 52 led:53 type: object54 $ref: /schemas/leds/common.yaml#55 unevaluatedProperties: false56 57required:58 - compatible59 - reg60 61if:62 properties:63 compatible:64 const: holtek,ht16k3365then:66 required:67 - refresh-rate-hz68 69additionalProperties: false70 71examples: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