linux-kernel - Re: [PATCH v2 1/1] arm64: dts: qcom: x1e80100-dell-xps-9345: Add WiFi/BT pwrseq

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Message-ID: <CAMcHhXq9W64MHhOV5i3U4t+ZfKNC_GaBq5X3ZN7VOLt0cjPQPg@mail.gmail.com>
Date: Mon, 31 Mar 2025 11:38:25 +0200
From: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
To: Johan Hovold <johan@...nel.org>, "Tudor, Laurentiu" <Laurentiu.Tudor1@...l.com>, 
	"Bryan O'Donoghue" <bryan.odonoghue@...aro.org>
Cc: Bjorn Andersson <bjorn.andersson@....qualcomm.com>, linux-arm-msm@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	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>, 
	dmitry.baryshkov@....qualcomm.com, 
	Stephan Gerhold <stephan.gerhold@...aro.org>
Subject: Re: [PATCH v2 1/1] arm64: dts: qcom: x1e80100-dell-xps-9345: Add
 WiFi/BT pwrseq

On Mon, 31 Mar 2025 at 10:09, Johan Hovold <johan@...nel.org> wrote:
>
> [ +CC: Stephan ]
>
> On Mon, Mar 31, 2025 at 08:33:47AM +0100, Aleksandrs Vinarskis wrote:
> > Add the WiFi/BT nodes for XPS and describe the regulators for the WCN7850
> > combo chip using the new power sequencing bindings. All voltages are
> > derived from chained fixed regulators controlled using a single GPIO.
> >
> > Based on the commit d09ab685a8f5 ("arm64: dts: qcom: x1e80100-qcp: Add
> > WiFi/BT pwrseq").
>
> Are you sure this is correct and that you don't need to worry about the
> "how do we model the supplies to an M.2 card" issue?
>
> See
>
>         https://lore.kernel.org/lkml/Z-KuG0aOwEnxuhp9@linaro.org/

Dell XPS 9345 does not have an M.2 card, WLAN package is soldered
directly onboard, hence I am quite sure this is similar to QCP.
To be certain, perhaps @Tudor, Laurentiu or @Bryan O'Donoghue (if  you
have it?) could confirm from schematics?

>
> > With that fixed commit f5b788d0e8cd ("arm64: dts: qcom: Add support for
> > X1-based Dell XPS 13 9345")
>
> Not sure what happened here.

Bluetooth and WLAN definitions were missing, as at the time I only
knew the UART port being used for bluetooth, and was missing
everything else to describe it.

Alex

>
> Johan