linux-kernel - Re: [PATCH V2 2/2] ASoC: dt-bindings: max98363: add soundwire amplifier

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Date:   Sat, 11 Mar 2023 10:10:20 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     “Ryan <ryan.lee.analog@...il.com>,
        lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, rf@...nsource.cirrus.com,
        ckeepax@...nsource.cirrus.com,
        pierre-louis.bossart@...ux.intel.com, herve.codina@...tlin.com,
        wangweidong.a@...nic.com, james.schulman@...rus.com,
        ajye_huang@...pal.corp-partner.google.com, shumingf@...ltek.com,
        povik+lin@...ebit.org, flatmax@...tmax.com,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        ryans.lee@...log.com
Subject: Re: [PATCH V2 2/2] ASoC: dt-bindings: max98363: add soundwire
 amplifier

On 11/03/2023 02:14, “Ryan wrote:
> From: Ryan Lee <ryans.lee@...log.com>
> 
> This patch adds dt-bindings information for Analog Devices MAX98363
> SoundWire Amplifier.
> 
> Signed-off-by: Ryan Lee <ryans.lee@...log.com>
> ---
> Changes from v1:
>   Fixed a syntax error for the 'dt_binding_check' build.
>   Removed unnecessary properties.
>   Added description about SoundWire device ID of MAX98363
> 
>  .../bindings/sound/adi,max98363.yaml          | 42 +++++++++++++++++++
>  1 file changed, 42 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/adi,max98363.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/adi,max98363.yaml b/Documentation/devicetree/bindings/sound/adi,max98363.yaml
> new file mode 100644
> index 000000000000..0e71b6c84007
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/adi,max98363.yaml
> @@ -0,0 +1,42 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/adi,max98363.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices MAX98363 SoundWire Amplifier
> +
> +maintainers:
> +  - Ryan Lee <ryans.lee@...log.com>
> +
> +description:
> +  The MAX98363 is a SoundWire input Class D mono amplifier that
> +  supports MIPI SoundWire v1.2-compatible digital interface for
> +  audio and control data.
> +  SoundWire peripheral device ID of MAX98363 is 0x3X019F836300
> +  where X is the peripheral device unique ID decoded from pin.
> +  It supports up to 10 peripheral devices(0x0 to 0x9).
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,max98363

Aren't soundwire devices supposed to use device ID as compatible?

Missing blank line

> +  reg:
> +    maxItems: 1
> +    description: Peripheral-device unique ID decoded from pin.
> +

It's not a DAI?

> +required:
> +  - compatible
> +  - reg

Missing blank line

> +additionalProperties: false
> +
> +examples:
> +  - |
> +    soundwire {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        amplifier@3 {
> +            compatible = "adi,max98363";
> +            reg = <0x3>;

That looks a bit different than regular SoundWire bus. I would argue
that it's not SoundWire at all...


> +        };
> +    };

Best regards,
Krzysztof