linux-kernel - Re: [PATCH v1 1/7] dt-bindings: power: Constrain properties for JH7110 PMU

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Date:   Fri, 14 Apr 2023 07:27:44 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC:     Changhuang Liang <changhuang.liang@...rfivetech.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Walker Chen <walker.chen@...rfivetech.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v1 1/7] dt-bindings: power: Constrain properties for
 JH7110 PMU

On Wed, Apr 12, 2023 at 01:29:57PM +0200, Krzysztof Kozlowski wrote:
> On 12/04/2023 11:42, Conor Dooley wrote:
> > On Wed, Apr 12, 2023 at 04:51:16PM +0800, Changhuang Liang wrote:
> >>
> >>
> >> On 2023/4/12 16:35, Krzysztof Kozlowski wrote:
> >>> On 11/04/2023 08:47, Changhuang Liang wrote:
> >>>> When use "starfive,jh7110-pmu-dphy" compatible, do not need the reg and
> >>>> interrupts properties.
> >> [...]
> >>>>  
> >>>>  description: |
> >>>>    StarFive JH7110 SoC includes support for multiple power domains which can be
> >>>> @@ -17,6 +18,7 @@ properties:
> >>>>    compatible:
> >>>>      enum:
> >>>>        - starfive,jh7110-pmu
> >>>> +      - starfive,jh7110-pmu-dphy
> >>>
> >>> You do here much more than commit msg says.
> >>>
> >>> Isn'y DPHY a phy? Why is it in power?
> >>>
> >>
> >> OK, I will add more description. This is a power framework used to turn on/off 
> >> DPHY. So it in power, not a phy.
> > 
> > Perhaps tie it less to its role w/ the phy, and more to do with its
> > location, say "jh7110-aon-pmu"?
> > There's already "aon"/"sys"/"stg" stuff used in clock-controller and
> > syscon compatibles etc.
> > 
> > Krzysztof, what do you think of that? (if you remember the whole
> > discussion we previously had about using those identifiers a few weeks
> > ago).
> 
> Depends whether this is the same case or not.

> AFAIR, for AON/SYS/STG
> these were blocks with few features, not only clock controller.

Correct, yes. In the dts, this "pmu-dphy" node is a child node of the
aon syscon, so this pmu stuff would be one of the several features.


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