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Industrial I/O devices can be present in the audio path. These devices needs to be viewed as audio components in order to be fully integrated in the audio path. audio-iio-aux allows to consider these Industrial I/O devices as auxliary audio devices. Signed-off-by: Herve Codina <herve.codina@bootlin.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Christophe Leroy <christophe.leroy@©sgroup.eu> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/20230623085830.749991-2-herve.codina@bootlin.com Signed-off-by: Mark Brown <broonie@kernel.org>
64 lines
1.8 KiB
YAML
64 lines
1.8 KiB
YAML
# 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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$id: http://devicetree.org/schemas/sound/audio-iio-aux.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Audio IIO auxiliary
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maintainers:
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- Herve Codina <herve.codina@bootlin.com>
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description:
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Auxiliary device based on Industrial I/O device channels
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allOf:
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- $ref: dai-common.yaml#
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properties:
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compatible:
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const: audio-iio-aux
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io-channels:
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description:
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Industrial I/O device channels used
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io-channel-names:
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description:
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Industrial I/O channel names related to io-channels.
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These names are used to provides sound controls, widgets and routes names.
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snd-control-invert-range:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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description: |
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A list of 0/1 flags defining whether or not the related channel is
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inverted
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items:
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enum: [0, 1]
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default: 0
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description: |
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Invert the sound control value compared to the IIO channel raw value.
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- 1: The related sound control value is inverted meaning that the
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minimum sound control value correspond to the maximum IIO channel
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raw value and the maximum sound control value correspond to the
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minimum IIO channel raw value.
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- 0: The related sound control value is not inverted meaning that the
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minimum (resp maximum) sound control value correspond to the
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minimum (resp maximum) IIO channel raw value.
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required:
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- compatible
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- io-channels
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- io-channel-names
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unevaluatedProperties: false
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examples:
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- |
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iio-aux {
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compatible = "audio-iio-aux";
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io-channels = <&iio 0>, <&iio 1>, <&iio 2>, <&iio 3>;
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io-channel-names = "CH0", "CH1", "CH2", "CH3";
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/* Invert CH1 and CH2 */
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snd-control-invert-range = <0 1 1 0>;
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};
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