linux-kernel - Re: [PATCH v2 1/1] arm64: dts: qcom: sm8350-sagami: usb qmp phy node - add 'vdda-pll-supply' & 'vdda-phy-supply'

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 20 Apr 2022 10:49:59 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        konrad.dybcio@...ainline.org, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, bhupesh.linux@...il.com,
        linux-kernel@...r.kernel.org, vkoul@...nel.org
Subject: Re: [PATCH v2 1/1] arm64: dts: qcom: sm8350-sagami: usb qmp phy node
 - add 'vdda-pll-supply' & 'vdda-phy-supply'

On 2022-04-20 12:28:24, Bhupesh Sharma wrote:
> Hi Bjorn,
> 
> On Wed, 20 Apr 2022 at 08:11, Bjorn Andersson
> <bjorn.andersson@...aro.org> wrote:
> >
> > On Tue 19 Apr 15:58 CDT 2022, Bhupesh Sharma wrote:
> >
> > How about making the subject:
> >
> > "arm64: dts: qcom: sm8350-sagami: add supplies to USB phy node"
> >
> > It still says the same thing, but in much less characters.
> 
> Sure, this wording seems better to me. Will fix this in v3.
> 
> > > 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 usb qmp phy and are used by the qcom qmp phy driver.
> > >
> > > So, its safe to assume that the two regulators are the same as on
> > > the MTP. So let's wire them up in the same way as the MTP.
> > >
> >
> > I'm not sure it's "safe to assume", so I would like to get Konrad's
> > input before merging this.
> 
> Right. @Konrad Dybcio , @Marijn Suijten - Any comments on this fix?
> Please share your thoughts.

All we can do is read downstream sources (and/or check compiled DTS
after all overrides have been flattened together), or read sysfs to
validate values where applicable.

These are indeed the two regulators used by USB in:

	https://github.com/sonyxperiadev/kernel/blob/7378fb627b546e0eae24cccd3ab37fa9e0802f95/arch/arm64/boot/dts/qcom/lahaina-usb.dtsi#L146-L149

And the voltages are correct for our board too as per:

	https://github.com/sonyxperiadev/kernel/blob/7378fb627b546e0eae24cccd3ab37fa9e0802f95/arch/arm64/boot/dts/qcom/lahaina-regulators.dtsi

It appears only L6 is used by other hardware nodes, but that should be
fine.

As such, with the suggestions from Bjorn applied:

	Reviewed-by: Marijn Suijten <marijn.suijten@...ainline.org>

- Marijn

> Thanks,
> Bhupesh
> 
> > > 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
> > >
> >
> > This is good!
> >
> > Thanks for the patch Bhupesh,
> > Bjorn
> >
> > > [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>
> > > Cc: Marijn Suijten <marijn.suijten@...ainline.org>
> > > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > > ---
> > > Changes since v1:
> > > -----------------
> > > - v1 can be found here: https://www.spinics.net/lists/linux-arm-msm/msg108467.html
> > > - Fixed the commit message to read usb qmp phy instead of ufs phy (which
> > >   was introduced erroraneously in the commit log).
> > >
> > >  .../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>;
> > >  };
> > > --
> > > 2.35.1
> > >