linux-kernel - Re: [PATCH v2 5/6] dt-bindings: arm: mediatek: Add missing power-domains property

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Message-ID: <CAGXv+5GniKdzf2cQfmc=usR693gJDq26kvgoUYOjhPdHFTKx2w@mail.gmail.com>
Date:   Thu, 29 Dec 2022 18:15:54 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Jie Chen <chun-jie.chen@...iatek.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ikjoon Jang <ikjn@...omium.org>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        angelogioacchino.delregno@...labora.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2 5/6] dt-bindings: arm: mediatek: Add missing
 power-domains property

On Wed, Dec 21, 2022 at 4:18 PM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 21/12/2022 04:44, Allen-KH Cheng wrote:
> > The "mediatek,mt8192-scp_adsp" binding requires a power domain to be
> > specified.
>
> That's not true. Before this patch, how does the binding require a power
> domain? Please show me the part of binding which requires it.

Maybe this should be reworded to something like the following?

<--- cut
The SCP_ADSP clock controller has a power domain dependency that was not
described properly. Add it to the binding.
<--- cut

This was discovered when I was reworking the clock drivers. The clocks
in this controller were being turned off by the clock core, which would
result in the system locking up. MediaTek said this was due to the power
domain.

Regards
ChenYu