Re: [PATCH 2/3] ASoC: dt-bindings: add the Qualcomm WCD9378 audio codec

[Rob Herring <robh@kernel.org>]

On Mon, Jul 06, 2026 at 09:22:28PM +0200, Jorijn van der Graaf wrote:
> The Qualcomm WCD9378 is a standalone audio codec IC found on SM7635
> boards such as the Fairphone 6. Like the WCD937x/938x/939x codecs it
> presents RX and TX SoundWire slave devices controlled by a common
> parent node, so the parent binding references qcom,wcd93xx-common.yaml;
> unlike those codecs it has three ADCs and three mic bias supplies
> rather than four, hence qcom,micbias4-microvolt is rejected.
> 
> The slave devices enumerate with manufacturer ID 0x0217 and part ID
> 0x0110, hence the sdw20217011000 compatible. The TX slave carries five
> device ports (ADC1, ADC2, ADC3, DMIC0/1 plus MBHC, DMIC2-5) and the RX
> slave the usual five (HPH, CLSH, COMP, LO, DSD).
> 
> The -codec suffix in the parent compatible follows the existing
> qcom,wcd93xx/pm4125 family compatibles and matches the compatible
> shipped by production devicetrees for this chip.
> 
> Assisted-by: Claude:claude-fable-5
> Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
> ---
>  .../bindings/sound/qcom,wcd9378-codec.yaml    |  76 +++++++++++
>  .../bindings/sound/qcom,wcd9378-sdw.yaml      | 122 ++++++++++++++++++
>  2 files changed, 198 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd9378-codec.yaml
>  create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd9378-codec.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd9378-codec.yaml
> new file mode 100644
> index 000000000000..32554541b279
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/qcom,wcd9378-codec.yaml
> @@ -0,0 +1,76 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/qcom,wcd9378-codec.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm WCD9378 Audio Codec
> +
> +maintainers:
> +  - Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
> +
> +description:
> +  The Qualcomm WCD9378 is a standalone Hi-Fi audio codec IC with three
> +  ADCs, three mic bias supplies, headphone/earpiece/line outputs and
> +  MBHC. It has RX and TX SoundWire slave devices; the control registers
> +  live in the SDCA control address space accessed through the TX slave.
> +
> +allOf:
> +  - $ref: dai-common.yaml#
> +  - $ref: qcom,wcd93xx-common.yaml#
> +
> +properties:
> +  compatible:
> +    const: qcom,wcd9378-codec
> +
> +  qcom,micbias4-microvolt: false
> +
> +required:
> +  - compatible
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    audio-codec {
> +        compatible = "qcom,wcd9378-codec";
> +        reset-gpios = <&tlmm 162 GPIO_ACTIVE_LOW>;
> +        vdd-buck-supply = <&vreg_l8b>;
> +        vdd-rxtx-supply = <&vreg_l7b>;
> +        vdd-io-supply = <&vreg_l7b>;
> +        vdd-mic-bias-supply = <&vreg_bob>;
> +        qcom,micbias1-microvolt = <1800000>;
> +        qcom,micbias2-microvolt = <1800000>;
> +        qcom,micbias3-microvolt = <1800000>;
> +        qcom,rx-device = <&wcd9378_rx>;
> +        qcom,tx-device = <&wcd9378_tx>;
> +        #sound-dai-cells = <1>;
> +    };
> +
> +    /* ... */
> +
> +    soundwire@3210000 {
> +        reg = <0x03210000 0x2000>;
> +        #address-cells = <2>;
> +        #size-cells = <0>;
> +
> +        wcd9378_rx: audio-codec@0,4 {
> +            compatible = "sdw20217011000";
> +            reg = <0 4>;
> +            qcom,rx-port-mapping = <1 2 3 4 5>;
> +        };
> +    };
> +
> +    soundwire@33b0000 {
> +        reg = <0x033b0000 0x2000>;
> +        #address-cells = <2>;
> +        #size-cells = <0>;
> +
> +        wcd9378_tx: audio-codec@0,3 {
> +            compatible = "sdw20217011000";
> +            reg = <0 3>;
> +            qcom,tx-port-mapping = <1 1 1 2 3>;
> +        };
> +    };

Drop these 2. They are just duplicated from qcom,wcd9378-sdw.yaml.

Rob