linux-kernel - Re: [PATCH v1 06/10] ASoC: dt-bindings: add wsa881x-i2c binding for analog mode

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Message-Id: <D695QHHBLGUF.7HOOI1E8RMTS@linaro.org>
Date: Wed, 11 Dec 2024 20:35:21 +0000
From: "Alexey Klimov" <alexey.klimov@...aro.org>
To: "Krzysztof Kozlowski" <krzk@...nel.org>
Cc: <broonie@...nel.org>, <konradybcio@...nel.org>,
 <konrad.dybcio@....qualcomm.com>, <andersson@...nel.org>,
 <srinivas.kandagatla@...aro.org>, <tiwai@...e.com>, <lgirdwood@...il.com>,
 <perex@...ex.cz>, <robh@...nel.org>, <krzk+dt@...nel.org>,
 <conor+dt@...nel.org>, <dmitry.baryshkov@...aro.org>,
 <linux-sound@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 06/10] ASoC: dt-bindings: add wsa881x-i2c binding for
 analog mode

On Fri Nov 1, 2024 at 7:57 AM GMT, Krzysztof Kozlowski wrote:
> On Fri, Nov 01, 2024 at 05:31:50AM +0000, Alexey Klimov wrote:
> > Add binding document for WSA881X family of smart speaker amplifiers
> > that set to work in analog mode only and configurable via i2c only.
> > Such devices are found in Qualcomm QRB4210 RB2 boards with
> > SM4250/SM6115 SoCs.
> > 
> > Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> > Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
> > ---
> >  .../bindings/sound/qcom,wsa881x-i2c.yaml      | 103 ++++++++++++++++++
> >  1 file changed, 103 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/sound/qcom,wsa881x-i2c.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/sound/qcom,wsa881x-i2c.yaml b/Documentation/devicetree/bindings/sound/qcom,wsa881x-i2c.yaml
> > new file mode 100644
> > index 000000000000..51b040b134d2
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/sound/qcom,wsa881x-i2c.yaml
>
> Filename must match compatible.
>
> > @@ -0,0 +1,103 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/sound/qcom,wsa881x-i2c.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm WSA8810/WSA8815 Class-D Smart Speaker Amplifier in Analog mode
> > +
> > +maintainers:
> > +  - Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> > +  - Alexey Klimov <alexey.klimov@...aro.org>
> > +
> > +description: |
> > +  WSA8810 is a class-D smart speaker amplifier and WSA8815
> > +  is a high-output power class-D smart speaker amplifier.
> > +  Their primary operating mode uses a SoundWire digital audio
> > +  interface however the amplifier also supports analog mode and it
> > +  can be controlled via I2C. This binding is for I2C interface.
> > +
> > +allOf:
> > +  - $ref: dai-common.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,qrb4210-wsa881x-i2c-codec
>
> qrb4210 is a name of a board, not codec. i2c is redundant, codec as
> well. 'x' is not allowed.

qcom,qrb4210-wsa881x-i2c-codec came from qcom-soc.yaml with the advice
that it should be qcom,SoC-IP.

Anyway I am working on updating the qcom,wsa881x.yaml as you pointed out
in another email.

> This is qcom,wsa8810 and qcom,wsa8815 compatible with it.
>

[..]

> > +
> > +      wsa881x@e {
>
> Node names should be generic. See also an explanation and list of
> examples (not exhaustive) in DT specification:
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

The best I can come up with is "amplifier", or it should be at least "codec'.

Thanks for the review!
Best regards,
Alexey