linux-kernel - Re: [PATCH v2 3/7] dts: arm64: mt8195: add MMSYS and MUTEX configuration for VPPSYS

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Message-ID: <1d2613aa-3225-a2b6-521a-b2df70a30ed5@linaro.org>
Date:   Tue, 11 Oct 2022 08:23:32 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Moudy Ho <moudy.ho@...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>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
Subject: Re: [PATCH v2 3/7] dts: arm64: mt8195: add MMSYS and MUTEX
 configuration for VPPSYS

On 11/10/2022 03:03, Moudy Ho wrote:
> From: "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
> 
> Compatible names, node names, and GCE client registers for
> VPPSYS0 and VPPSYS1 should be renamed or added to match
> the binding file requirements.
> Also, add two nodes for MT8195 VPPSYS MUTEX.
> 
> Signed-off-by: Roy-CW.Yeh <roy-cw.yeh@...iatek.com>
> Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>

Use subject prefixes matching the subsystem (git log --oneline -- ...).

> ---
>  arch/arm64/boot/dts/mediatek/mt8195.dtsi | 30 ++++++++++++++++++++----
>  1 file changed, 26 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> index 905d1a90b406..3e73bd58e54d 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> @@ -1476,12 +1476,23 @@
>  			#clock-cells = <1>;
>  		};
>  
> -		vppsys0: clock-controller@...00000 {
> -			compatible = "mediatek,mt8195-vppsys0";
> +		vppsys0: syscon@...00000 {
> +			compatible = "mediatek,mt8195-vppsys0",
> +				     "mediatek,mt8195-mmsys", "syscon";

No. You change multiple pieces in one patch, some of them have much
bigger impact, like adding compatibles.

Split and describe *why* you are changing it.

>  			reg = <0 0x14000000 0 0x1000>;
> +			mediatek,gce-client-reg = <&gce1 SUBSYS_1400XXXX 0 0x1000>;
>  			#clock-cells = <1>;
>  		};
>  
> +		mutex@...0f000 {
> +			compatible = "mediatek,mt8195-vpp-mutex";

And you add some new nodes in a cleanup patch...

Best regards,
Krzysztof