linux-kernel - Re: [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: Add vbus regulator support for Type-A ports

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Message-ID: <34aabb90-c81c-43eb-ba95-024f97d91afb@oss.qualcomm.com>
Date: Tue, 9 Dec 2025 13:31:10 +0530
From: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: Add vbus regulator
 support for Type-A ports



On 12/9/2025 1:22 PM, Dmitry Baryshkov wrote:
> On Tue, Dec 09, 2025 at 09:47:01AM +0530, Krishna Kurapati wrote:
>> The Multiport controller on Hamoa EVK platform is connected to Two Type-A
>> ports. VBUS for each of these ports are provided by a TPS2559QWDRCTQ1
>> regulator, controlled from PMIC GPIOs.
>>
>> Add the necessary regulators and GPIO configuration to power these.
> 
> Should this also include corresponding USB-A connector devices? See
> qcs6490-radxa-dragon-q6a.dts for the example of how to describe them.
> 

Hi Dmitry,

  I see same discussion that came up when we were trying to upstream 
TypeA connectors of SA8295:
	
https://lore.kernel.org/all/CAA8EJppf+j6H8vPOrer1Oj6SuM=qHKXoBahtCaCr7an-cbpyOQ@mail.gmail.com/

There is no entity (either phy or dwc3) as of today that can read the 
vbus from connector-A node and use it. So keeping these regulators 
always on for now.

Regards,
Krishna,

>>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
>> Signed-off-by: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
>> ---
>> Changes in v2:
>> - Re-ordered nodes to be in sorted order.
>>
>> Link to v1:
>> https://lore.kernel.org/all/20251208085152.2597818-1-krishna.kurapati@oss.qualcomm.com/
>>
>>   arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 37 ++++++++++++++++++++++
>>   1 file changed, 37 insertions(+)
>>
>