linux-kernel - Re: [PATCH 1/1] arm64: dts: qcom: sm8350-sagami: UFS phy - add 'vdda-pll-supply' & 'vdda-phy-supply'

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Message-ID: <CAH=2NtzFGYAxc_0aEWUV-Jn4JwV4UtCNRui_KL7RRiG4BWF92g@mail.gmail.com>
Date:   Mon, 18 Apr 2022 16:09:18 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>
Cc:     linux-arm-msm@...r.kernel.org, bhupesh.linux@...il.com,
        agross@...nel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, robh+dt@...nel.org,
        bjorn.andersson@...aro.org, konrad.dybcio@...ainline.org,
        Vinod Koul <vkoul@...nel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>
Subject: Re: [PATCH 1/1] arm64: dts: qcom: sm8350-sagami: UFS phy - add
 'vdda-pll-supply' & 'vdda-phy-supply'

On Thu, 14 Apr 2022 at 19:41, Marijn Suijten
<marijn.suijten@...ainline.org> wrote:
>
> On 2022-04-14 17:59:28, Bhupesh Sharma wrote:
> > As suggested by Bjorn during review of [1], the vdda-pll-supply' &
> > 'vdda-phy-supply' supplies denote the power for the bus and the
> > clock of the UFS PHY.
> >
> > For pdx215 to have a functional UFS [..] safe to assume [..]
>
> By "functional" you are referring to sending a certain UFS command that
> accidentally wipes the bootloader [1] [2], turning the device into a
> _very_ expensive (+$1000) paperweight?
>
> [1]: https://lore.kernel.org/lkml/20211111184630.605035-1-konrad.dybcio@somainline.org/
> [2]: https://github.com/kholk/kernel/commit/2e7a9ee1c91a016baa0b826a7752ec45663a0561
>
> > In absence of the same 'make dtbs_check' leads to following warnings:
> >
> > arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami-pdx215.dt.yaml:
> >  phy-wrapper@...9000: 'vdda-phy-supply' is a required property
> >
> > arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami-pdx215.dt.yaml:
> >  phy-wrapper@...9000: 'vdda-pll-supply' is a required property
> >
> > [1]. https://lore.kernel.org/lkml/20220228123019.382037-9-bhupesh.sharma@linaro.org/
> >
> > Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Cc: konrad.dybcio@...ainline.org
> > Cc: Vinod Koul <vkoul@...nel.org>
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >  .../dts/qcom/sm8350-sony-xperia-sagami.dtsi   | 25 +++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami.dtsi b/arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami.dtsi
> > index 90b13cbe2fa6..238ac9380ca2 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami.dtsi
> > @@ -3,6 +3,7 @@
> >   * Copyright (c) 2021, Konrad Dybcio <konrad.dybcio@...ainline.org>
> >   */
> >
> > +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> >  #include "sm8350.dtsi"
> >  #include "pm8350.dtsi"
> >  #include "pm8350b.dtsi"
> > @@ -75,6 +76,27 @@ ramoops@...00000 {
> >       };
> >  };
> >
> > +&apps_rsc {
> > +     pm8350-rpmh-regulators {
> > +             compatible = "qcom,pm8350-rpmh-regulators";
> > +             qcom,pmic-id = "b";
> > +
> > +             vreg_l1b_0p88: ldo1 {
> > +                     regulator-name = "vreg_l1b_0p88";
> > +                     regulator-min-microvolt = <912000>;
> > +                     regulator-max-microvolt = <920000>;
> > +                     regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> > +             };
> > +
> > +             vreg_l6b_1p2: ldo6 {
> > +                     regulator-name = "vreg_l6b_1p2";
> > +                     regulator-min-microvolt = <1200000>;
> > +                     regulator-max-microvolt = <1208000>;
> > +                     regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> > +             };
> > +     };
> > +};
> > +
> >  &adsp {
> >       status = "okay";
> >       firmware-name = "qcom/adsp.mbn";
> > @@ -256,4 +278,7 @@ &usb_1_hsphy {
> >
> >  &usb_1_qmpphy {
> >       status = "okay";
> > +
> > +     vdda-phy-supply = <&vreg_l6b_1p2>;
> > +     vdda-pll-supply = <&vreg_l1b_0p88>;
>
> I'm probably understanding your patch wrong, but this is the USB phy,
> not the UFS phy?  The warning from dtbs_check on `phy-wrapper@...9000`
> is also the `qmp-usb3-phy`, not the `qmp-ufs-phy` - seems this patch has
> little to do with UFS after all?

Indeed, it should be the qmp USB3 phy, instead.. my bad.. I will fix it in v2.

Do you see any issues with enabling these two regulators in the
'sm8350-sony-xperia-sagami-pdx215' dts?

Thanks,
Bhupesh

> >  };
> > --
> > 2.35.1
> >