linux-kernel - Re: [PATCH] dt-bindings: arm: mediatek: mmsys: refine power and gce properties

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Message-ID: <b7bb228f-751c-e7ad-a695-3dc40d889a72@linaro.org>
Date:   Thu, 28 Apr 2022 09:16:26 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "jason-jh.lin" <jason-jh.lin@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Fabien Parent <fparent@...libre.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, CK Hu <ck.hu@...iatek.com>,
        Rex-BC Chen <rex-bc.chen@...iatek.com>,
        Nancy Lin <nancy.lin@...iatek.com>,
        Singo Chang <singo.chang@...iatek.com>,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH] dt-bindings: arm: mediatek: mmsys: refine power and gce
 properties

On 28/04/2022 03:27, jason-jh.lin wrote:
> From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
> 
> Power:
>   Refine description and add item number for power-domains property.
> 
> GCE:
>   Refine description and add item number for mboxes property and
>   mediatek,gce-client-reg property.
> 
> Fixes: 1da90b8a7bae ("dt-bindings: arm: mediatek: mmsys: add power and gce properties")
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> ---
>  .../bindings/arm/mediatek/mediatek,mmsys.yaml | 29 +++++++++----------
>  1 file changed, 14 insertions(+), 15 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> index 6ad023eec193..6722f1b724ef 100644
> --- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> @@ -43,28 +43,27 @@ properties:
>      maxItems: 1
>  
>    power-domains:
> +    maxItems: 1
>      description:
> -      A phandle and PM domain specifier as defined by bindings
> -      of the power controller specified by phandle. See
> -      Documentation/devicetree/bindings/power/power-domain.yaml for details.
> +      Each mmsys belongs to a power-domains. If mmsys wants to use PM
> +      interface to control the power controller of mmsys, it should have
> +      this property.
>  
>    mboxes:
> +    minItems: 1

maxItems, surely you cannot have infinite number of mailboxes to talk with?

>      description:
> -      Using mailbox to communicate with GCE, it should have this
> -      property and list of phandle, mailbox specifiers. See
> -      Documentation/devicetree/bindings/mailbox/mtk-gce.txt for details.
> -    $ref: /schemas/types.yaml#/definitions/phandle-array
> +      If using mailbox to communicate with GCE, it should have this
> +      property. GCE will help configure the hardware settings for the
> +      current mmsys data pipeline.
>  
>    mediatek,gce-client-reg:
> -    description:
> -      The register of client driver can be configured by gce with 4 arguments
> -      defined in this property, such as phandle of gce, subsys id,
> -      register offset and size.
> -      Each subsys id is mapping to a base address of display function blocks
> -      register which is defined in the gce header
> -      include/dt-bindings/gce/<chip>-gce.h.
> -    $ref: /schemas/types.yaml#/definitions/phandle-array

Why removing ref? Does your binding work after such change?

>      maxItems: 1
> +    items:
> +      - items:
> +          - description: phandle to GCE
> +          - description: subsys id
> +          - description: register offset
> +          - description: register size
>  
>    "#clock-cells":
>      const: 1


Best regards,
Krzysztof