linux-kernel - Re: [PATCH v2 1/8] ASoC: dt-bindings: wcd937x: add bindings for wcd937x

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Date: Wed, 17 Apr 2024 17:51:07 +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 1/8] ASoC: dt-bindings: wcd937x: add bindings for
 wcd937x

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 device RX and
> TX respectively, supporting 3 x ADCs, ClassH, Ear, Aux PA, 2xHPH,
> 6 DMICs, MBHC.
> 
> 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.yaml          | 119 ++++++++++++++++++
>  1 file changed, 119 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd937x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd937x.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd937x.yaml
> new file mode 100644
> index 000000000000..b45f823af04f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/qcom,wcd937x.yaml

No wildcards. This is wcd9370, right?

> @@ -0,0 +1,119 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/qcom,wcd937x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm WCD9370 Audio Codec
> +
> +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.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,wcd9370-codec

Can it be anything else than codec?

> +
> +  reset-gpios:
> +    description: GPIO spec for reset line to use
> +    maxItems: 1
> +
> +  vdd-buck-supply:
> +    description: A reference to the 1.8V buck supply
> +
> +  vdd-rxtx-supply:
> +    description: A reference to the 1.8V rx supply
> +
> +  vdd-px-supply:
> +    description: A reference to the 1.8V I/O supply
> +
> +  vdd-mic-bias-supply:
> +    description: A reference to the 3.8V mic bias supply
> +
> +  qcom,tx-device:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: A reference to Soundwire tx device phandle

"A reference to phandle" is not correct. Phandle is the reference.
Anyway, both are redundant.

>
> +  qcom,rx-device:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: A reference to Soundwire rx device phandle
> +
> +  qcom,micbias1-microvolt:
> +    description: micbias1 voltage
> +    minimum: 1800000
> +    maximum: 2850000
> +
> +  qcom,micbias2-microvolt:
> +    description: micbias2 voltage
> +    minimum: 1800000
> +    maximum: 2850000
> +
> +  qcom,micbias3-microvolt:
> +    description: micbias3 voltage
> +    minimum: 1800000
> +    maximum: 2850000
> +
> +  '#sound-dai-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reset-gpios
> +  - qcom,tx-device
> +  - qcom,rx-device
> +  - qcom,micbias1-microvolt
> +  - qcom,micbias2-microvolt
> +  - qcom,micbias3-microvolt
> +  - "#sound-dai-cells"
> +
> +unevaluatedProperties: false

This does not make sense without ref to dai-common, so this should point
you to missing ref.

> +
> +examples:
> +  - |
> +    codec {
> +        compatible = "qcom,wcd9370-codec";
> +        pinctrl-names = "default", "sleep";
> +        pinctrl-0 = <&wcd_reset_n>;
> +        pinctrl-1 = <&wcd_reset_n_sleep>;
> +        reset-gpios = <&tlmm 83 0>;
> +        vdd-buck-supply = <&vreg_l17b_1p8>;
> +        vdd-rxtx-supply = <&vreg_l18b_1p8>;
> +        vdd-px-supply = <&vreg_l18b_1p8>;
> +        vdd-mic-bias-supply = <&vreg_bob>;
> +        qcom,micbias1-microvolt = <1800000>;
> +        qcom,micbias2-microvolt = <1800000>;
> +        qcom,micbias3-microvolt = <1800000>;
> +        qcom,rx-device = <&wcd937x_rx>;
> +        qcom,tx-device = <&wcd937x_tx>;
> +        #sound-dai-cells = <1>;
> +    };
> +
> +    /* ... */
> +
> +    soundwire@...0000 {
> +        #address-cells = <2>;

Drop this and other nodes.

Best regards,
Krzysztof