linux-kernel - Re: [PATCH 4/4] dt-bindings: soc: samsung: exynos-sysreg: add clocks for Exynos850

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Message-ID: <CAPLW+4kHef4pMNMbc8kvKzM0v0qBMoX6zwH1QCQKcLLubfcWXg@mail.gmail.com>
Date:   Fri, 25 Nov 2022 09:01:15 -0600
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        Sriranjani P <sriranjani.p@...sung.com>,
        Chanho Park <chanho61.park@...sung.com>
Subject: Re: [PATCH 4/4] dt-bindings: soc: samsung: exynos-sysreg: add clocks
 for Exynos850

On Fri, 25 Nov 2022 at 08:49, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 25/11/2022 15:38, Sam Protsenko wrote:
> > On Fri, 25 Nov 2022 at 05:22, Krzysztof Kozlowski
> > <krzysztof.kozlowski@...aro.org> wrote:
> >>
> >> Exynos850 has dedicated clock for accessing SYSREGs.  Allow it, even
> >> though Linux currently does not enable them and relies on bootloader.
> >>
> >
> > Not sure if this description is correct. Of course, there is no driver
> > for "samsung,exynos850-sysreg" compatible at the moment, so the next
> > compatible from the list ("syscon") is used for Exynos850. And
> > "syscon" driver (drivers/mfd/syscon.c) actually does control the
> > clocks. I remember adding "clocks" property to Exynos850 dts to fix
> > actual problem. Also, the "clocks" property is not described in
> > Documentation/devicetree/bindings/mfd/syscon.yaml, didn't really check
> > if it's ok or it's just missing.
> >
> > Other than that comment:
> >
> > Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>
> >
> >> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>
> Ah, then commit msg is not good. I'll update it and maybe the clocks
> should be required for Exynos850?
>

Yeah, looks like all Exynos850 sysreg blocks have dedicated clock.
Please make it required. And thanks for working on that! :)

> Best regards,
> Krzysztof
>