ASoC: dt-bindings: nau8824: Convert to dtschema
Convert the NAU8824 audio CODEC bindings to DT schema. Signed-off-by: David Lin <CTLIN0@nuvoton.com Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/r/20230515065557.614125-1-CTLIN0@nuvoton.com Signed-off-by: Mark Brown <broonie@kernel.org
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David Lin
Mark Brown
parent
20ef7f2139
commit
518a1742f4
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Nuvoton NAU8824 audio codec
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This device supports I2C only.
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Required properties:
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- compatible : Must be "nuvoton,nau8824"
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- reg : the I2C address of the device. This is either 0x1a (CSB=0) or 0x1b (CSB=1).
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Optional properties:
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- nuvoton,jkdet-polarity: JKDET pin polarity. 0 - active high, 1 - active low.
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- nuvoton,vref-impedance: VREF Impedance selection
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0 - Open
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1 - 25 kOhm
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2 - 125 kOhm
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3 - 2.5 kOhm
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- nuvoton,micbias-voltage: Micbias voltage level.
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0 - VDDA
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1 - VDDA
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2 - VDDA * 1.1
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3 - VDDA * 1.2
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4 - VDDA * 1.3
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5 - VDDA * 1.4
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6 - VDDA * 1.53
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7 - VDDA * 1.53
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- nuvoton,sar-threshold-num: Number of buttons supported
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- nuvoton,sar-threshold: Impedance threshold for each button. Array that contains up to 8 buttons configuration. SAR value is calculated as
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SAR = 255 * MICBIAS / SAR_VOLTAGE * R / (2000 + R)
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where MICBIAS is configured by 'nuvoton,micbias-voltage', SAR_VOLTAGE is configured by 'nuvoton,sar-voltage', R - button impedance.
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Refer datasheet section 10.2 for more information about threshold calculation.
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- nuvoton,sar-hysteresis: Button impedance measurement hysteresis.
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- nuvoton,sar-voltage: Reference voltage for button impedance measurement.
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0 - VDDA
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1 - VDDA
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2 - VDDA * 1.1
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3 - VDDA * 1.2
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4 - VDDA * 1.3
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5 - VDDA * 1.4
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6 - VDDA * 1.53
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7 - VDDA * 1.53
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- nuvoton,sar-compare-time: SAR compare time
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0 - 500 ns
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1 - 1 us
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2 - 2 us
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3 - 4 us
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- nuvoton,sar-sampling-time: SAR sampling time
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0 - 2 us
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1 - 4 us
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2 - 8 us
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3 - 16 us
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- nuvoton,short-key-debounce: Button short key press debounce time.
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0 - 30 ms
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1 - 50 ms
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2 - 100 ms
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- nuvoton,jack-eject-debounce: Jack ejection debounce time.
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0 - 0 ms
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1 - 1 ms
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2 - 10 ms
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Example:
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headset: nau8824@1a {
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compatible = "nuvoton,nau8824";
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reg = <0x1a>;
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interrupt-parent = <&gpio>;
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interrupts = <TEGRA_GPIO(E, 6) IRQ_TYPE_LEVEL_LOW>;
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nuvoton,vref-impedance = <2>;
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nuvoton,micbias-voltage = <6>;
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// Setup 4 buttons impedance according to Android specification
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nuvoton,sar-threshold-num = <4>;
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nuvoton,sar-threshold = <0xc 0x1e 0x38 0x60>;
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nuvoton,sar-hysteresis = <0>;
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nuvoton,sar-voltage = <6>;
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nuvoton,sar-compare-time = <1>;
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nuvoton,sar-sampling-time = <1>;
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nuvoton,short-key-debounce = <0>;
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nuvoton,jack-eject-debounce = <1>;
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};
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182
Documentation/devicetree/bindings/sound/nuvoton,nau8824.yaml
Normal file
182
Documentation/devicetree/bindings/sound/nuvoton,nau8824.yaml
Normal file
@ -0,0 +1,182 @@
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/nuvoton,nau8824.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NAU8824 audio CODEC
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maintainers:
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- John Hsu <KCHSU0@nuvoton.com>
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allOf:
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- $ref: dai-common.yaml#
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properties:
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compatible:
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enum:
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- nuvoton,nau8824
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reg:
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maxItems: 1
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'#sound-dai-cells':
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const: 0
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interrupts:
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maxItems: 1
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nuvoton,jkdet-polarity:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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JKDET pin polarity.
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enum:
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- 0 # active high
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- 1 # active low
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default: 1
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nuvoton,vref-impedance:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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VREF Impedance selection.
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enum:
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- 0 # Open
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- 1 # 25 kOhm
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- 2 # 125 kOhm
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- 3 # 2.5 kOhm
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default: 2
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nuvoton,micbias-voltage:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Micbias voltage level.
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enum:
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- 0 # VDDA
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- 1 # VDDA
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- 2 # VDDA * 1.1
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- 3 # VDDA * 1.2
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- 4 # VDDA * 1.3
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- 5 # VDDA * 1.4
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- 6 # VDDA * 1.53
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- 7 # VDDA * 1.53
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default: 6
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nuvoton,sar-threshold-num:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Number of buttons supported.
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minimum: 1
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maximum: 8
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default: 4
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nuvoton,sar-threshold:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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description:
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Impedance threshold for each button. Array that contains up to 8 buttons
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configuration. SAR value is calculated as
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SAR = 255 * MICBIAS / SAR_VOLTAGE * R / (2000 + R) where MICBIAS is
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configured by 'nuvoton,micbias-voltage', SAR_VOLTAGE is configured by
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'nuvoton,sar-voltage', R - button impedance.
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Refer datasheet section 10.2 for more information about threshold
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calculation.
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minItems: 1
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maxItems: 8
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items:
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minimum: 0
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maximum: 255
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nuvoton,sar-hysteresis:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Button impedance measurement hysteresis.
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default: 0
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nuvoton,sar-voltage:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Reference voltage for button impedance measurement.
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enum:
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- 0 # VDDA
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- 1 # VDDA
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- 2 # VDDA * 1.1
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- 3 # VDDA * 1.2
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- 4 # VDDA * 1.3
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- 5 # VDDA * 1.4
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- 6 # VDDA * 1.53
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- 7 # VDDA * 1.53
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default: 6
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nuvoton,sar-compare-time:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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SAR compare time.
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enum:
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- 0 # 500ns
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- 1 # 1us
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- 2 # 2us
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- 3 # 4us
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default: 1
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nuvoton,sar-sampling-time:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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SAR sampling time.
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enum:
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- 0 # 2us
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- 1 # 4us
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- 2 # 8us
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- 3 # 16us
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default: 1
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nuvoton,short-key-debounce:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Button short key press debounce time.
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enum:
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- 0 # 30 ms
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- 1 # 50 ms
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- 2 # 100 ms
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default: 0
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nuvoton,jack-eject-debounce:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Jack ejection debounce time.
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enum:
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- 0 # 0 ms
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- 1 # 1 ms
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- 2 # 10 ms
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default: 1
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required:
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- compatible
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- reg
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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codec@1a {
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#sound-dai-cells = <0>;
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compatible = "nuvoton,nau8824";
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reg = <0x1a>;
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interrupt-parent = <&gpio>;
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interrupts = <38 IRQ_TYPE_LEVEL_LOW>;
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nuvoton,vref-impedance = <2>;
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nuvoton,micbias-voltage = <6>;
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nuvoton,sar-threshold-num = <4>;
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// Setup 4 buttons impedance according to Android specification
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nuvoton,sar-threshold = <0xc 0x1e 0x38 0x60>;
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nuvoton,sar-hysteresis = <0>;
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nuvoton,sar-voltage = <6>;
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nuvoton,sar-compare-time = <1>;
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nuvoton,sar-sampling-time = <1>;
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nuvoton,short-key-debounce = <0>;
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nuvoton,jack-eject-debounce = <1>;
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};
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};
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