linux-kernel - Re: [PATCH] arm64: dts: qcom: qcs6490: Add Thundercomm AI Mini PC G1 IoT

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Message-ID: <CAEQ9gE=sw9dmD67xRK0uvYLt9bd=ervifBSAjagNTw+zVr0e3Q@mail.gmail.com>
Date: Fri, 6 Feb 2026 01:35:03 -0800
From: Roger Shimizu <rosh@...ian.org>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: qcs6490: Add Thundercomm AI Mini PC G1 IoT

On Thu, Feb 5, 2026 at 12:52 AM Konrad Dybcio
<konrad.dybcio@....qualcomm.com> wrote:
>
> On 2/5/26 1:04 AM, Roger Shimizu wrote:
> > Thanks Konrad for the review!
> >
> > On Wed, Feb 4, 2026 at 1:21 AM Konrad Dybcio
> > <konrad.dybcio@....qualcomm.com> wrote:
> >>
> >> On 1/31/26 11:31 AM, Roger Shimizu wrote:
> >>> Thundercomm AI MiniPC G1 IoT is single board computer with
> >>> AI capability based on Qualcomm QCS6490 platform.
> >>>
> >>> This device tree is confirmed to work as below:
> >>> - GPU
> >>> - HDMI output port
> >>> - PCIe M.2 port (for external Wi-Fi or 5G connectivity)
> >>> - UART / serial console port
> >>> - UFS
> >>> - USB Type-C port, with Display Port
> >>>
> >>> Signed-off-by: Roger Shimizu <rosh@...ian.org>
> >>> ---
>
> [...]
>
> >>> +             vreg_s1b_1p872: smps1 {
> >>> +                     regulator-name = "vreg_s1b_1p872";
> >>> +                     regulator-min-microvolt = <1840000>;
> >>> +                     regulator-max-microvolt = <2040000>;
> >>
> >> Have you cross-checked the regulator settings against the original
> >> vendor-provided sw?
> >
> > No. Those are from RB3 Gen2. So far there's no issue.
> > If there's an issue, we can fix it later.
>
> The issue may be that once you enable one of these regulators, you'll
> see magic smoke.. please cross-check it

Thanks for the explanation!
I'll check it.

> >> [...]
> >>
> >>> +&pon_pwrkey {
> >>> +     status = "okay";
> >>> +};
> >>
> >> This one is already enabled
> >
> > May I know where it's enabled?
> > From my search, pon_pwrkey is defined in:
> > arch/arm64/boot/dts/qcom/pmk8350.dtsi, which is disabled.
>
> Right, I must have misread.

Glad it's clarified.

-Roger