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Message-ID: <20230617183731.31e9b3c4@jic23-huawei>
Date:   Sat, 17 Jun 2023 18:37:31 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Herve Codina <herve.codina@...tlin.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v5 01/13] ASoC: dt-bindings: Add audio-iio-aux

On Thu, 15 Jun 2023 17:26:19 +0200
Herve Codina <herve.codina@...tlin.com> wrote:

> 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@...tlin.com>

LGTM
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  .../bindings/sound/audio-iio-aux.yaml         | 64 +++++++++++++++++++
>  1 file changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/audio-iio-aux.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml b/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml
> new file mode 100644
> index 000000000000..d3cc1ea4a175
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/audio-iio-aux.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/audio-iio-aux.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Audio IIO auxiliary
> +
> +maintainers:
> +  - Herve Codina <herve.codina@...tlin.com>
> +
> +description:
> +  Auxiliary device based on Industrial I/O device channels
> +
> +allOf:
> +  - $ref: dai-common.yaml#
> +
> +properties:
> +  compatible:
> +    const: audio-iio-aux
> +
> +  io-channels:
> +    description:
> +      Industrial I/O device channels used
> +
> +  io-channel-names:
> +    description:
> +      Industrial I/O channel names related to io-channels.
> +      These names are used to provides sound controls, widgets and routes names.
> +
> +  snd-control-invert-range:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description: |
> +      A list of 0/1 flags defining whether or not the related channel is
> +      inverted
> +    items:
> +      enum: [0, 1]
> +      default: 0
> +      description: |
> +        Invert the sound control value compared to the IIO channel raw value.
> +          - 1: The related sound control value is inverted meaning that the
> +               minimum sound control value correspond to the maximum IIO channel
> +               raw value and the maximum sound control value correspond to the
> +               minimum IIO channel raw value.
> +          - 0: The related sound control value is not inverted meaning that the
> +               minimum (resp maximum) sound control value correspond to the
> +               minimum (resp maximum) IIO channel raw value.
> +
> +required:
> +  - compatible
> +  - io-channels
> +  - io-channel-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    iio-aux {
> +        compatible = "audio-iio-aux";
> +        io-channels = <&iio 0>, <&iio 1>, <&iio 2>, <&iio 3>;
> +        io-channel-names = "CH0", "CH1", "CH2", "CH3";
> +        /* Invert CH1 and CH2 */
> +        snd-control-invert-range = <0 1 1 0>;
> +    };

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