Based on kernel version 6.11
. Page generated on 2024-09-24 08:21 EST
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2 --- $id: http://devicetree.org/schemas/sound/nuvoton,nau8824.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: NAU8824 audio CODEC maintainers: - John Hsu <KCHSU0@nuvoton.com> allOf: - $ref: dai-common.yaml# properties: compatible: enum: - nuvoton,nau8824 reg: maxItems: 1 '#sound-dai-cells': const: 0 clocks: items: - description: The phandle of the master clock to the CODEC clock-names: items: - const: mclk interrupts: maxItems: 1 nuvoton,jkdet-polarity: $ref: /schemas/types.yaml#/definitions/uint32 description: JKDET pin polarity. enum: - 0 # active high - 1 # active low default: 1 nuvoton,vref-impedance: $ref: /schemas/types.yaml#/definitions/uint32 description: VREF Impedance selection. enum: - 0 # Open - 1 # 25 kOhm - 2 # 125 kOhm - 3 # 2.5 kOhm default: 2 nuvoton,micbias-voltage: $ref: /schemas/types.yaml#/definitions/uint32 description: Micbias voltage level. enum: - 0 # VDDA - 1 # VDDA - 2 # VDDA * 1.1 - 3 # VDDA * 1.2 - 4 # VDDA * 1.3 - 5 # VDDA * 1.4 - 6 # VDDA * 1.53 - 7 # VDDA * 1.53 default: 6 nuvoton,sar-threshold-num: $ref: /schemas/types.yaml#/definitions/uint32 description: Number of buttons supported. minimum: 1 maximum: 8 default: 4 nuvoton,sar-threshold: $ref: /schemas/types.yaml#/definitions/uint32-array description: Impedance threshold for each button. Array that contains up to 8 buttons configuration. SAR value is calculated as SAR = 255 * MICBIAS / SAR_VOLTAGE * R / (2000 + R) where MICBIAS is configured by 'nuvoton,micbias-voltage', SAR_VOLTAGE is configured by 'nuvoton,sar-voltage', R - button impedance. Refer datasheet section 10.2 for more information about threshold calculation. minItems: 1 maxItems: 8 items: minimum: 0 maximum: 255 nuvoton,sar-hysteresis: $ref: /schemas/types.yaml#/definitions/uint32 description: Button impedance measurement hysteresis. default: 0 nuvoton,sar-voltage: $ref: /schemas/types.yaml#/definitions/uint32 description: Reference voltage for button impedance measurement. enum: - 0 # VDDA - 1 # VDDA - 2 # VDDA * 1.1 - 3 # VDDA * 1.2 - 4 # VDDA * 1.3 - 5 # VDDA * 1.4 - 6 # VDDA * 1.53 - 7 # VDDA * 1.53 default: 6 nuvoton,sar-compare-time: $ref: /schemas/types.yaml#/definitions/uint32 description: SAR compare time. enum: - 0 # 500ns - 1 # 1us - 2 # 2us - 3 # 4us default: 1 nuvoton,sar-sampling-time: $ref: /schemas/types.yaml#/definitions/uint32 description: SAR sampling time. enum: - 0 # 2us - 1 # 4us - 2 # 8us - 3 # 16us default: 1 nuvoton,short-key-debounce: $ref: /schemas/types.yaml#/definitions/uint32 description: Button short key press debounce time. enum: - 0 # 30 ms - 1 # 50 ms - 2 # 100 ms default: 0 nuvoton,jack-eject-debounce: $ref: /schemas/types.yaml#/definitions/uint32 description: Jack ejection debounce time. enum: - 0 # 0 ms - 1 # 1 ms - 2 # 10 ms default: 1 required: - compatible - reg unevaluatedProperties: false examples: - | #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/interrupt-controller/irq.h> i2c { #address-cells = <1>; #size-cells = <0>; codec@1a { #sound-dai-cells = <0>; compatible = "nuvoton,nau8824"; reg = <0x1a>; interrupt-parent = <&gpio>; interrupts = <38 IRQ_TYPE_LEVEL_LOW>; nuvoton,vref-impedance = <2>; nuvoton,micbias-voltage = <6>; nuvoton,sar-threshold-num = <4>; // Setup 4 buttons impedance according to Android specification nuvoton,sar-threshold = <0xc 0x1e 0x38 0x60>; nuvoton,sar-hysteresis = <0>; nuvoton,sar-voltage = <6>; nuvoton,sar-compare-time = <1>; nuvoton,sar-sampling-time = <1>; nuvoton,short-key-debounce = <0>; nuvoton,jack-eject-debounce = <1>; }; }; |