linux-kernel - Re: [PATCH 0/3] add vdda-aux regulator support for QMP PHY on QCS6490

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Message-ID: <454ad8d6-43c9-4819-b849-c123fa9d33bd@oss.qualcomm.com>
Date: Mon, 10 Nov 2025 13:04:46 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Amit Singh <quic_amitsi@...cinc.com>, andersson@...nel.org,
        konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, vkoul@...nel.org, kishon@...nel.org,
        lumag@...nel.org, neil.armstrong@...aro.org, quic_wcheng@...cinc.com
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_riteshk@...cinc.com, quic_rajeevny@...cinc.com,
        quic_vproddut@...cinc.com
Subject: Re: [PATCH 0/3] add vdda-aux regulator support for QMP PHY on QCS6490

On 11/10/25 12:58 PM, Amit Singh wrote:
> The `vdda-aux` supply is necessary for proper power sequencing and reliable
> USB enumeration on platforms that provide this rail.
> 
> This series adds support for the `vdda-aux` regulator to the QMP PHY driver
> and updates the QCS6490 RB3 Gen2 device tree to provide the required
> auxiliary 3.0 V rail for stable USB PHY operation.
> Platforms that do not define `vdda-aux` remain unaffected.
> 
> Tested on RB3 Gen2 (QCS6490) platform to ensure proper USB enumeration and
> PHY stability.

I don't see this vreg going to the SoC on the schematics.

What is it actually powering?

Konrad