linux-kernel - Re: [PATCH v3 7/7] ASoC: dt-bindings: mediatek,mt8188-afe: add audio properties

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Date:   Thu, 27 Apr 2023 09:48:32 -0500
From:   Rob Herring <robh@...nel.org>
To:     Trevor Wu <trevor.wu@...iatek.com>
Cc:     broonie@...nel.org, lgirdwood@...il.com, tiwai@...e.com,
        perex@...ex.cz, krzysztof.kozlowski+dt@...aro.org,
        matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        alsa-devel@...a-project.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 7/7] ASoC: dt-bindings: mediatek,mt8188-afe: add audio
 properties

On Wed, Apr 26, 2023 at 01:51:24PM +0800, Trevor Wu wrote:
> Add apll1_d4 to clocks for switching the parent of top_a1sys_hp
> dynamically. On the other hand, "mediatek,infracfg" is included for bus
> protection.

Bus protection? Meaning access controls for the device? If so, there's a 
proposed binding[1] for just that. If that's something Mediatek needs 
too, please participate in that discussion. It's easier to define new 
common bindings if there is more than one user.

> 
> Signed-off-by: Trevor Wu <trevor.wu@...iatek.com>
> ---
>  .../bindings/sound/mediatek,mt8188-afe.yaml          | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
> index 82ccb32f08f2..eb58de8c0e68 100644
> --- a/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
> +++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
> @@ -29,6 +29,10 @@ properties:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description: The phandle of the mediatek topckgen controller
>  
> +  mediatek,infracfg:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: The phandle of the mediatek infracfg controller
> +
>    power-domains:
>      maxItems: 1
>  
> @@ -52,6 +56,7 @@ properties:
>        - description: mux for i2si1_mck
>        - description: mux for i2si2_mck
>        - description: audio 26m clock
> +      - description: audio pll1 divide 4
>  
>    clock-names:
>      items:
> @@ -73,6 +78,7 @@ properties:
>        - const: i2si1_m_sel
>        - const: i2si2_m_sel
>        - const: adsp_audio_26m
> +      - const: apll1_d4

A new required entry may break the ABI. If that's okay, it needs to be 
explained in the commit msg.

Rob

[1] https://lore.kernel.org/lkml/cover.1668070216.git.oleksii_moisieiev@epam.com/