linux-kernel - Re: [PATCH v3] arm64: dts: qcom: qcs6490-rb3gen2: Enable USB2 controller Micro-USB OTG

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Message-ID: <c3on5e56hqipudpt7uyam2cples3rhadpz324zeg7nebczsglt@bxuy5jzrxjc7>
Date: Wed, 11 Feb 2026 12:02:06 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Akash Kumar <akash.kumar@....qualcomm.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        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-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3] arm64: dts: qcom: qcs6490-rb3gen2: Enable USB2
 controller Micro-USB OTG

On Wed, Feb 11, 2026 at 11:55:51AM +0530, Akash Kumar wrote:
> Enable the secondary USB controller (USB2) and its High-Speed PHY to
> support OTG functionality via a Micro-USB connector.
> 
> Define a dedicated 'usb2-connector' node using the 'gpio-usb-b-connector'
> compatible to handle ID and VBUS detection. Link this connector to the
> DWC3 controller via OF graph ports to satisfy schema requirements and
> enable role switching.
> 
> Specific hardware configuration:
> - ID pin: TLMM 61
> - VBUS detection: PM7325 GPIO 9
> - VBUS supply: Fixed regulator controlled by TLMM 63
> - Configure &usb_2 in OTG mode with role switching enabled.
> - Define a gpio-usb-b-connector node for Micro-USB support, mapping the
>   ID pin to TLMM 61 and VBUS detection to PM7325 GPIO 9.
> - Add the 'vdd_micro_usb_vbus' fixed regulator (controlled by TLMM 63) to
>   supply VBUS to the connector.
> - Add the 'usb2_id_detect' pinctrl state to configure GPIO 61 for ID
>   detection.
> - Enable &usb_2_hsphy and populate necessary voltage supplies (VDDA PLL,
>   VDDA 1.8V, VDDA 3.3V).
> 
> Signed-off-by: Akash Kumar <akash.kumar@....qualcomm.com>
> ---
> v3: Added empty line between reg and endpoint.
>     v2: https://lore.kernel.org/all/2zztcabuf4hkixj445m3iiqdsmg7jju62e3fgupb6kaqirx5lq@2mhs5hcn3p7p/

And sadly ignored the tag.

Let me repeat it:


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>



> ---
> v2: Fixed minor comments on v1: https://lore.kernel.org/all/ad294a50-027f-4caa-a9b4-e145f709b50a@oss.qualcomm.com/
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 66 ++++++++++++++++++++
>  1 file changed, 66 insertions(+)
> 

-- 
With best wishes
Dmitry