linux-kernel - Re: [PATCH 00/14] arm64: dts: qcom: add refgen regulators where applicable

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Message-ID: <a7a41d1f-372e-4e90-9785-fd63212752c2@oss.qualcomm.com>
Date: Wed, 24 Sep 2025 20:13:09 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 00/14] arm64: dts: qcom: add refgen regulators where
 applicable

On 9/24/25 7:32 PM, Dmitry Baryshkov wrote:
> On Wed, 24 Sept 2025 at 13:13, Konrad Dybcio
> <konrad.dybcio@....qualcomm.com> wrote:
>>
>> On 9/21/25 9:09 AM, Dmitry Baryshkov wrote:
>>> On several Qualcomm platforms the DSI internally is using the refgen
>>> regulator. Document the regulator for the SDM670, Lemans and QCS8300
>>> platforms. Add corresponding device nodes and link them as a supply to
>>> the DSI node.
>>
>> It's likely that all PHY-ish hardware uses REFGEN, so please make
>> extra sure your patches won't kill DP/USB/camera
> 
> As far as I understand, DP and USB cast their votes directly in HW.
> For camera... I don't know. Do we need an extra vote?

$ rg refgen-supply arch -l

arch/arm64/boot/dts/qcom/lito-camera.dtsi
arch/arm64/boot/dts/qcom/kona-camera.dtsi
arch/arm64/boot/dts/qcom/lagoon-camera.dtsi
arch/arm64/boot/dts/qcom/lahaina-sde.dtsi
arch/arm64/boot/dts/qcom/kona-sde.dtsi

Konrad