linux-kernel - Re: [PATCH v2 2/8] dt-bindings: dsp: fsl,dsp: Add resets property

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Message-ID: <12614210.O9o76ZdvQC@steina-w>
Date: Thu, 20 Feb 2025 11:36:53 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: p.zabel@...gutronix.de, robh@...nel.org, shawnguo@...nel.org,
 linux-arm-kernel@...ts.infradead.org
Cc: krzk+dt@...nel.org, conor+dt@...nel.org, s.hauer@...gutronix.de,
 kernel@...gutronix.de, festevam@...il.com, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, mathieu.poirier@...aro.org,
 shengjiu.wang@....com, Frank.Li@....com, peng.fan@....com,
 laurentiu.mihalcea@....com, iuliana.prodan@....com,
 Daniel Baluta <daniel.baluta@....com>, Daniel Baluta <daniel.baluta@....com>
Subject: Re: [PATCH v2 2/8] dt-bindings: dsp: fsl,dsp: Add resets property

Hi,

Am Mittwoch, 19. Februar 2025, 20:20:56 CET schrieb Daniel Baluta:
> On i.MX8MP we introduced support for using a reset controller
> to control DSP operation.
> 
> This patch adds reset property which is required for i.MX8MP.
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> ---
>  .../devicetree/bindings/dsp/fsl,dsp.yaml      | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> index ab93ffd3d2e5..923e7f079f1b 100644
> --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> @@ -82,6 +82,13 @@ properties:
>      description:
>        Phandle to syscon block which provide access for processor enablement
>  
> +  resets:
> +    description:
> +      A pair consisting of phandle to audio-blk-control and an index referencing
> +      the DSP Run/Stall bit in audiomix registers.
> +      See include/dt-bindings/reset/imx8mp-reset-audiomix.h for each index meaning.
> +    maxItems: 1
> +
>  required:
>    - compatible
>    - reg
> @@ -164,6 +171,16 @@ allOf:
>              - const: txdb1
>              - const: rxdb0
>              - const: rxdb1
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - fsl,imx8mp-dsp
> +              - fsl,imx8mp-hifi4
> +    then:
> +      required:
> +        - "resets"
>  
>  additionalProperties: false
>  
> @@ -220,5 +237,5 @@ examples:
>                 <&mu2 3 0>;
>        memory-region = <&dsp_vdev0buffer>, <&dsp_vdev0vring0>,
>                        <&dsp_vdev0vring1>, <&dsp_reserved>;
> -      fsl,dsp-ctrl = <&audio_blk_ctrl>;
> +      resets = <&audio_blk_ctrl IMX8MP_AUDIOMIX_DSP>;

Am I missing something here? fsl,dsp-ctrl is used to get the regmap from syscon.

Best regards,
Alexander

>      };
> 


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