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

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Message-ID: <eea8feec-d097-415a-8b5a-c51edab2dc5b@oss.qualcomm.com>
Date: Fri, 26 Sep 2025 15:48:36 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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 9/26/25 3:44 PM, Dmitry Baryshkov wrote:
> 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.

OK thanks for checking that

Konrad