linux-kernel - Re: [PATCH v5 3/5] arm64: dts: qcom: sdm845: add UFS controller

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Date:   Wed, 28 Nov 2018 15:43:13 -0800
From:   Evan Green <evgreen@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     robh@...nel.org, Andy Gross <andy.gross@...aro.org>, kishon@...com,
        Doug Anderson <dianders@...omium.org>, swboyd@...omium.org,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        David Brown <david.brown@...aro.org>, mark.rutland@....com,
        linux-soc@...r.kernel.org
Subject: Re: [PATCH v5 3/5] arm64: dts: qcom: sdm845: add UFS controller

On Wed, Nov 21, 2018 at 11:18 PM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> On Fri 26 Oct 10:35 PDT 2018, Evan Green wrote:
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > index b72bdb0a31a5..9c72edb678ec 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -808,6 +808,73 @@
> >                       };
> >               };
> >
> > +             ufshc1: ufshc@...4000 {
>
> There's only one ufshc and one ufsphy, so no need to include the index.

Aren't there two UFS controllers on SDM845, a "card" one and a "mem"
one? I'm only adding the "mem" one here since that's all I can test,
but I thought it made sense to leave the number there so someone could
add the "card" one later if needed.
>
> [..]
> > +                     resets = <&gcc GCC_UFS_PHY_BCR>;
> > +                     reset-names = "rst";
>
> I have this as well, but this is not used by the upstream driver nor is
> it mentioned in the dt-binding.

I see it in Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt,
but then the only place I see it being used is ufs-hisi.c. So you're
right, I think I should spin and remove this. Since I'm spinning, let
me know about the numbering thing above.


>
> > +
> > +                     status = "disabled";
> > +             };
> > +
> > +             ufsphy1: phy@...7000 {
>
> With reservation for the "reset" issue:
>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
>
> Regards,
> Bjorn