linux-kernel - Re: [PATCH v2 3/8] ASoC: dt-bindings: wcd937x-sdw: add bindings for wcd937x-sdw

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Message-ID: <20acec19-0dc9-4926-aac5-f24fcc09cba3@kernel.org>
Date: Wed, 17 Apr 2024 17:56:36 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Mohammad Rafi Shaik <quic_mohs@...cinc.com>,
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
 Banajit Goswami <bgoswami@...cinc.com>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
 Takashi Iwai <tiwai@...e.com>
Cc: alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org,
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, quic_rohkumar@...cinc.com,
 quic_pkumpatl@...cinc.com
Subject: Re: [PATCH v2 3/8] ASoC: dt-bindings: wcd937x-sdw: add bindings for
 wcd937x-sdw

On 16/04/2024 08:35, Mohammad Rafi Shaik wrote:
> From: Prasad Kumpatla <quic_pkumpatl@...cinc.com>
> 
> Qualcomm WCD9370/WCD9375 Codec is a standalone Hi-Fi audio codec IC
> connected over SoundWire. This device has two SoundWire devices RX and
> TX respectively.
> This binding is for those slave devices on WCD9370/WCD9375.
> 
> Co-developed-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
> Signed-off-by: Prasad Kumpatla <quic_pkumpatl@...cinc.com>
> ---
>  .../bindings/sound/qcom,wcd937x-sdw.yaml      | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> new file mode 100644
> index 000000000000..2b7358e266ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/qcom,wcd937x-sdw.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm SoundWire Slave devices on WCD9370
> +
> +maintainers:
> +  - Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  Qualcomm WCD9370 Codec is a standalone Hi-Fi audio codec IC.
> +  It has RX and TX Soundwire slave devices. This bindings is for the
> +  slave devices.
> +
> +properties:
> +  compatible:
> +    const: sdw20217010a00
> +
> +  reg:
> +    maxItems: 1
> +
> +  qcom,tx-port-mapping:
> +    description: |
> +      Specifies static port mapping between slave and master tx ports.
> +      In the order of slave port index.

Use inclusive terminology. Describe what is here - what is the index?
What is the value?

> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 4
> +    maxItems: 4

Add constraints on values. You have maximum 15 TX ports, don't you?

> +
> +  qcom,rx-port-mapping:
> +    description: |
> +      Specifies static port mapping between slave and master rx ports.
> +      In the order of slave port index.
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 5
> +    maxItems: 5
> +
> +required:
> +  - compatible
> +  - reg
> +  - qcom,port-mapping

Test your binding. There is no need to engage reviewers for reviewing
simple mistakes which *tools* can point. Respect reviewers time and use
the tools first.

You need oneOf: with required for TX and RX... or just unify the
properties. Why do you need two?


> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    soundwire@...0000 {
Drop unit address.

> +        #address-cells = <2>;
> +        #size-cells = <0>;
> +        reg = <0x03210000 0x2000>;

Drop, not relevant and not placed correctly (see DTS coding style).

> +        wcd937x_rx: codec@0,4 {

Drop label, not used.

> +            compatible = "sdw20217010a00";
> +            reg  = <0 4>;
> +            qcom,rx-port-mapping = <1 2 3 4 5>;
> +        };
> +    };
> +
> +    soundwire@...0000 {

Drop this example, it's almost identical.

Best regards,
Krzysztof