linux-kernel - Re: [PATCH v3 4/6] regulator: qcom_spmi: Add support for PMP8074 regulators

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Date:   Wed, 18 May 2022 20:25:51 +0200
From:   Robert Marko <robimarko@...il.com>
To:     Konrad Dybcio <konrad.dybcio@...ainline.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        lgirdwood@...il.com, broonie@...nel.org,
        Rob Herring <robh+dt@...nel.org>,
        krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 4/6] regulator: qcom_spmi: Add support for PMP8074 regulators

On Wed, 18 May 2022 at 19:31, Robert Marko <robimarko@...il.com> wrote:
>
> On Wed, 18 May 2022 at 15:42, Konrad Dybcio
> <konrad.dybcio@...ainline.org> wrote:
> >
> >
> > On 17/05/2022 22:53, Robert Marko wrote:
> > > PMP8074 is a companion PMIC for the Qualcomm IPQ8074 WiSoC-s.
> > >
> > > It features 5 HF-SMPS and 13 LDO regulators.
> > >
> > > This commit adds support for S3 and S4 HF-SMPS buck regulators of
> > > the HFS430 type and LDO11 of the HT_P150 type.
> > > S3 is the CPU cluster voltage supply, S4 supplies the UBI32 NPU cores
> > > and LDO11 is the SDIO/eMMC I/O voltage regulator required for high speeds.
> > >
> > > Signed-off-by: Robert Marko <robimarko@...il.com>
> > > ---
> > >   drivers/regulator/qcom_spmi-regulator.c | 8 ++++++++
> > >   1 file changed, 8 insertions(+)
> > >
> > > diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
> > > index 38bbc70241ae..696b088aae40 100644
> > > --- a/drivers/regulator/qcom_spmi-regulator.c
> > > +++ b/drivers/regulator/qcom_spmi-regulator.c
> > > @@ -2137,6 +2137,13 @@ static const struct spmi_regulator_data pms405_regulators[] = {
> > >       { }
> > >   };
> > >
> > > +static const struct spmi_regulator_data pmp8074_regulators[] = {
> >
> > Please sort the struct alphabletically.
>
> Hi,
> Will fixup in v3.
>
> >
> >
> > > +     { "s3", 0x1a00, "vdd_s3"},
> > > +     { "s4", 0x1d00, "vdd_s4"},
> > > +     { "l11", 0x4a00, "vdd_l10_l11_l12_l13"},
> >
> > Are the other regulators somehow not controllable through SPMI? Please
> > leave a comment if that's the case.
>
> No, they are all controllable via SPMI as far as I know.
> Though the output table completely leaves out L7, L9, and L10.
> L5 and L6 are specified as Ebuck-4 subtypes (0x3d), while L10 is not
> listed at all (0x34).

Ok, I dug a bit further and L5/6 are HT_P600 and are easily supportable.
L10 is an HT_P50 type but it's listed as unused and left disabled, I don't know
its supported output voltage range.

Regards,
Robert

> These are not currently supported and I don't have enough information
> to support them.
> L1, L2, L3, L4, L7, L8, L9, L11, L12, and L13 appear to have their
> subtype already supported.
> L1, L2, L3, L8, L9 subtype (0x32)
> L4 subtype (0x30)
> L7, L11, L12, L13 subtype (0x35)
>
> S3, S4, and L11 are the most important ones.
> >
> >
> > > +     { }
> > > +};
> > > +
> > >   static const struct of_device_id qcom_spmi_regulator_match[] = {
> > >       { .compatible = "qcom,pm8004-regulators", .data = &pm8004_regulators },
> > >       { .compatible = "qcom,pm8005-regulators", .data = &pm8005_regulators },
> > > @@ -2150,6 +2157,7 @@ static const struct of_device_id qcom_spmi_regulator_match[] = {
> > >       { .compatible = "qcom,pm660-regulators", .data = &pm660_regulators },
> > >       { .compatible = "qcom,pm660l-regulators", .data = &pm660l_regulators },
> > >       { .compatible = "qcom,pms405-regulators", .data = &pms405_regulators },
> > > +     { .compatible = "qcom,pmp8074-regulators", .data = &pmp8074_regulators },
> >
> > Please sort the compatible too.
>
> Will fixup in v3.
>
> Regards,
> Robert
> >
> >
> > Konrad
> >
> > >       { }
> > >   };
> > >   MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
> > >