linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: lemans-evk: Enable the tertiary USB controller

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Message-ID: <CAEiyvpre9_C0KgJEGmmxDznxfAJLA6zkK9BU15tODX5nESc9Vg@mail.gmail.com>
Date: Wed, 11 Feb 2026 05:53:19 +0530
From: Krishna Kurapati PSSNV <krishna.kurapati@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Swati Agarwal <swati.agarwal@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: lemans-evk: Enable the tertiary USB controller

On Wed, Feb 11, 2026 at 2:39 AM Dmitry Baryshkov
<dmitry.baryshkov@....qualcomm.com> wrote:
>
> On Tue, Feb 10, 2026 at 08:29:50PM +0530, Swati Agarwal wrote:
> > On Fri, Feb 6, 2026 at 5:44 PM Dmitry Baryshkov
> > <dmitry.baryshkov@....qualcomm.com> wrote:
> > >
> > > On Fri, Feb 06, 2026 at 04:16:42PM +0530, Swati Agarwal wrote:
> > > > Enable the tertiary usb controller connected to micro usb port in OTG mode
> > > > on Lemans EVK platform.
> > > >
> > > > Signed-off-by: Swati Agarwal <swati.agarwal@....qualcomm.com>
> > > > ---
> > > >  arch/arm64/boot/dts/qcom/lemans-evk.dts | 53 +++++++++++++++++++++++++
> > > >  arch/arm64/boot/dts/qcom/lemans.dtsi    |  7 ++++
> > > >  2 files changed, 60 insertions(+)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
> > > > index 808827b83553..2710927c9172 100644
> > > > --- a/arch/arm64/boot/dts/qcom/lemans.dtsi
> > > > +++ b/arch/arm64/boot/dts/qcom/lemans.dtsi
> > > > @@ -4270,7 +4270,14 @@ usb_2: usb@...0000 {
> > > >                       snps,dis-u1-entry-quirk;
> > > >                       snps,dis-u2-entry-quirk;
> > > >
> > > > +                     usb-role-switch;
> > > >                       status = "disabled";
> > > > +
> > > > +                     port {
> > > > +                             usb_2_dwc3_hs: endpoint {
> > > > +                             };
> > >
> > > Is it USB-2 only? If not, please define both ports.
> > Hi Dmitry,
> > USB-2 is micro USB having only HS-PHY so only one port is needed.
>
> micro USB is on the connector side. Here you are describing the USB
> controller. Is it also HS-only? If the controller supports HS and SS,
> you need to have two ports here.
>


Yes. Tertiary controller on lemans is HS only controller.

Regards,
Krishna,