linux-kernel - Re: [PATCH] arm64: dts: qcom: x1e80100-dell-xps13-9345: Disable PM8010

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Message-ID: <Z9qXFLmnae86_GT9@linaro.org>
Date: Wed, 19 Mar 2025 11:06:12 +0100
From: Stephan Gerhold <stephan.gerhold@...aro.org>
To: bjorn.andersson@....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>,
	Aleksandrs Vinarskis <alex.vinarskis@...il.com>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: x1e80100-dell-xps13-9345: Disable
 PM8010

On Tue, Mar 18, 2025 at 10:17:02PM -0500, Bjorn Andersson via B4 Relay wrote:
> From: Bjorn Andersson <bjorn.andersson@....qualcomm.com>
> 
> The Qualcomm X Elite reference design uses the PM8010 PMIC for camera
> use cases, but the Dell XPS13 doesn't. Disable this PMIC to avoid the
> error in the kernel log caused by an attempt to access it during boot.
> 
> Fixes: f5b788d0e8cd ("arm64: dts: qcom: Add support for X1-based Dell XPS 13 9345")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@....qualcomm.com>

Usually we do the opposite: disable nodes by default that may or may not
be there and enable them where needed. E.g. for the 4 SMB2360 instances
in x1e80100-pmics.dtsi.

I think the same approach would also be preferable here. You shouldn't
get an error in the log just because you didn't go through all of your
DT includes and checked if you really have all of the components listed
there. I think it's okay to enable PMICs that are more or less
guaranteed to be there, but clearly this is not the case for PM8010.

Thanks,
Stephan