linux-kernel - Re: [PATCH 1/2] ASoC: dt-bindings: fsl,audmix: Add support for i.MX952 platform

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Message-ID: <20260117-versed-proficient-pigeon-bd0b2a@quoll>
Date: Sat, 17 Jan 2026 12:44:07 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Shengjiu Wang <shengjiu.wang@....com>
Cc: shengjiu.wang@...il.com, Xiubo.Lee@...il.com, festevam@...il.com, 
	nicoleotsuka@...il.com, lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz, 
	tiwai@...e.com, linux-sound@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, 
	linux-kernel@...r.kernel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, 
	devicetree@...r.kernel.org, shawnguo@...nel.org, s.hauer@...gutronix.de, 
	kernel@...gutronix.de, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] ASoC: dt-bindings: fsl,audmix: Add support for
 i.MX952 platform

On Fri, Jan 16, 2026 at 06:16:47PM +0800, Shengjiu Wang wrote:
> The specific feature for AUDMIX on i.MX952 is that it can be bypassed,
> so add fsl,amix-bypass property for this feature, besides this there is
> no power domain defined on i.MX952, so make power-domains to be
> dedicated to i.MX8QM.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  .../devicetree/bindings/sound/fsl,audmix.yaml | 35 +++++++++++++++++--
>  1 file changed, 33 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl,audmix.yaml b/Documentation/devicetree/bindings/sound/fsl,audmix.yaml
> index 3ad197b3c82c..50fb08460b4f 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,audmix.yaml
> +++ b/Documentation/devicetree/bindings/sound/fsl,audmix.yaml
> @@ -34,7 +34,9 @@ description: |
>  
>  properties:
>    compatible:
> -    const: fsl,imx8qm-audmix
> +    enum:
> +      - fsl,imx8qm-audmix
> +      - fsl,imx952-audmix
>  
>    reg:
>      maxItems: 1
> @@ -75,12 +77,41 @@ properties:
>          unevaluatedProperties: false
>          description: Output port to SAI RX
>  
> +  fsl,amix-bypass:
> +    type: boolean
> +    description:
> +      The audmix module is bypassed from hardware.

I don't understand why device AUDMIX would have property saying AUDMIX
(so itself) can by bypassed. If you bypass the device itself, what do
you configure here?


> +
>  required:
>    - compatible
>    - reg
>    - clocks
>    - clock-names
> -  - power-domains
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - fsl,imx8qm-audmix
> +    then:
> +      required:
> +        - power-domains
> +      not:
> +        required:
> +          - fsl,amix-bypass

fsl,amix-bypass: false

> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - fsl,imx952-audmix
> +    then:
> +      not:
> +        required:
> +          - power-domains

Not sure what you want to say here, but disallowing properties is shown
in example-schema (:false).

Best regards,
Krzysztof