linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: sm8150: Add ufs power-domain entries

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Message-ID: <CAH=2NtwVfA_OyfV3vopOWqbgv_T==Fdx-P60EniR9qYuvOnAsQ@mail.gmail.com>
Date:   Thu, 24 Mar 2022 01:56:35 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, bhupesh.linux@...il.com,
        agross@...nel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, sboyd@...nel.org, tdas@...eaurora.org,
        mturquette@...libre.com, linux-clk@...r.kernel.org,
        robh+dt@...nel.org, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: sm8150: Add ufs power-domain entries

Hi Bjorn,

On Wed, 9 Mar 2022 at 04:35, Bjorn Andersson <bjorn.andersson@...aro.org> wrote:
>
> On Thu 03 Mar 02:21 CST 2022, Bhupesh Sharma wrote:
>
> > Add power-domain entries for UFS controller & phy nodes
> > in sm8150 dts.
> >
> > Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Cc: Rob Herring <robh@...nel.org>
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >  arch/arm64/boot/dts/qcom/sm8150.dtsi | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > index 6012322a5984..7aa879eb24d7 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
> > @@ -1637,6 +1637,8 @@ ufs_mem_hc: ufshc@...4000 {
> >                       phy-names = "ufsphy";
> >                       lanes-per-direction = <2>;
> >                       #reset-cells = <1>;
> > +
> > +                     power-domains = <&gcc UFS_PHY_GDSC>;
>
> It seems odd that the controller would be in the PHY power-domain?

Ok.

> >                       resets = <&gcc GCC_UFS_PHY_BCR>;
> >                       reset-names = "rst";
> >
> > @@ -1687,6 +1689,9 @@ ufs_mem_phy: phy@...7000 {
> >                       clocks = <&gcc GCC_UFS_MEM_CLKREF_CLK>,
> >                                <&gcc GCC_UFS_PHY_PHY_AUX_CLK>;
> >
> > +                     power-domains = <&gcc UFS_CARD_GDSC>,
> > +                                     <&gcc UFS_PHY_GDSC>;
>
> And "card" is typically related to the second UFS interface, so I
> suspect you only would need the last one of these?

Right, I will send a fixed v4 version shortly.

Thanks,
Bhupesh

> > +                     power-domain-names = "ufs_card_gdsc", "ufs_phy_gdsc";
> >                       resets = <&ufs_mem_hc 0>;
> >                       reset-names = "ufsphy";
> >                       status = "disabled";
> > --
> > 2.35.1
> >