linux-kernel - Re: [PATCH v3 6/6] arm64: dts: qcom: Add USB controller and phy nodes for IPQ5424

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Message-ID: <ZzbZGnKEovwoDPrP@hu-varada-blr.qualcomm.com>
Date: Fri, 15 Nov 2024 10:46:10 +0530
From: Varadarajan Narayanan <quic_varada@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <vkoul@...nel.org>, <kishon@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <gregkh@...uxfoundation.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <mantas@...vices.com>,
        <quic_kbajaj@...cinc.com>, <quic_kriskura@...cinc.com>,
        <quic_rohiagar@...cinc.com>, <abel.vesa@...aro.org>,
        <quic_wcheng@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v3 6/6] arm64: dts: qcom: Add USB controller and phy
 nodes for IPQ5424

On Thu, Nov 14, 2024 at 03:28:36PM +0200, Dmitry Baryshkov wrote:
> On Thu, 14 Nov 2024 at 09:48, Varadarajan Narayanan
> <quic_varada@...cinc.com> wrote:
> >
> > The IPQ5424 SoC has both USB2.0 and USB3.0 controllers. The USB3.0
> > can connect to either of USB2.0 or USB3.0 phy and operate in the
> > respective mode.
> >
> > Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > ---
> > v3: Regulator node names, labels and 'regulator-name' changed per review suggestions
> >     Stray newline removed
> >
> > v2: Add dm/dp_hs_phy_irq to usb3@...0000 node
> >     Add u1/u2-entry quirks to usb@...0000 node
> > ---
> >  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts |  66 ++++++++
> >  arch/arm64/boot/dts/qcom/ipq5424.dtsi       | 159 ++++++++++++++++++++
> >  2 files changed, 225 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> > index d4d31026a026..859e15befb3f 100644
> > --- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> > +++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> > @@ -16,12 +16,70 @@ / {
> >         aliases {
> >                 serial0 = &uart1;
> >         };
> > +
> > +       vreg_misc_3p3: regulator-3300000 {
>
> Technically these names are correct. However they don't match the
> approach that Qualcomm DT files have been using up to now.
> You can compare your data with the output of `git grep :.regulator-
> arch/arm64/boot/dts/qcom/`

Dmitry,

This name was suggested by Rob Herring [1]. Shall I rename them as follows

	regulator-usb-3p3
	regulator-usb-1p8
	regulator-usb-0p925

Thanks
Varada

1 - https://lore.kernel.org/linux-arm-msm/20241113181138.GA1011553-robh@kernel.org/

> > +               compatible = "regulator-fixed";
> > +               regulator-min-microvolt = <3300000>;
> > +               regulator-max-microvolt = <3300000>;
> > +               regulator-boot-on;
> > +               regulator-always-on;
> > +               regulator-name = "usb_hs_vdda_3p3";
> > +       };
> > +
> > +       vreg_misc_1p8: regulator-1800000 {
> > +               compatible = "regulator-fixed";
> > +               regulator-min-microvolt = <1800000>;
> > +               regulator-max-microvolt = <1800000>;
> > +               regulator-boot-on;
> > +               regulator-always-on;
> > +               regulator-name = "vdda_1p8_usb";
> > +       };
> > +
> > +       vreg_misc_0p925: regulator-0925000 {
> > +               compatible = "regulator-fixed";
> > +               regulator-min-microvolt = <925000>;
> > +               regulator-max-microvolt = <925000>;
> > +               regulator-boot-on;
> > +               regulator-always-on;
> > +               regulator-name = "vdd_core_usb";
> > +       };
> > +};

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