linux-kernel - Re: [PATCH 09/14] arm64: dts: qcom: sm6350: add refgen regulator and use it for DSI

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Message-ID: <mmtoashmdv6cwwwdg7rpbk3kkrjddej6khdzlcyo5qb47lfunm@osemmb3z4m55>
Date: Fri, 26 Sep 2025 16:44:08 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Luca Weiss <luca.weiss@...rphone.com>, 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 09/14] arm64: dts: qcom: sm6350: add refgen regulator and
 use it for DSI

On Fri, Sep 26, 2025 at 03:27:24PM +0200, Konrad Dybcio wrote:
> On 9/23/25 9:17 AM, Luca Weiss wrote:
> > Hi Dmitry,
> > 
> > On Sun Sep 21, 2025 at 9:09 AM CEST, Dmitry Baryshkov wrote:
> >> Add the refgen regulator block and use it for the DSI controller.
> >>
> >> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> >> ---
> >>  arch/arm64/boot/dts/qcom/sm6350.dtsi | 8 ++++++++
> >>  1 file changed, 8 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sm6350.dtsi b/arch/arm64/boot/dts/qcom/sm6350.dtsi
> >> index 8459b27cacc72a4827a2e289e669163ad6250059..dd009569a6683a25f13b068e3e0bd8746b2ac501 100644
> >> --- a/arch/arm64/boot/dts/qcom/sm6350.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sm6350.dtsi
> >> @@ -1768,6 +1768,12 @@ usb_1_hsphy: phy@...3000 {
> >>  			resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
> >>  		};
> >>  
> >> +		refgen: regulator@...7000 {
> >> +			compatible = "qcom,sm6350-refgen-regulator",
> >> +				     "qcom,sm8250-refgen-regulator";
> >> +			reg = <0x0 0x088e7000 0x0 0x84>;
> > 
> > Are you sure the size is 0x84? Downstream and hwio_bitra_V1.cmm would
> > suggest size to be 0x60.
> > 
> > For sc7280, hwio_kodiak_E5.0.cmm does say 0x84 for refgen.
> 
> 0x60
> 
> moreover, I see that there are two refgen regulators..

There are two refgens on each of the platforms, but I think the other
one is used in the automatic way. The HPG only tells us about
programming this one.

-- 
With best wishes
Dmitry