linux-kernel - Re: [PATCH] arm64: dts: qcom: x1e80100: Add '#cooling-cells' for CPU nodes

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Message-ID: <qzpeft3wmmh7idysviyevrmfs72oeoz3c4dddizfovd7ix7yoq@6vtqz5fhknij>
Date: Mon, 8 Dec 2025 14:13:33 +0900
From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Manivannan Sadhasivam <mani@...nel.org>, andersson@...nel.org, 
	konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org, 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: x1e80100: Add '#cooling-cells' for CPU
 nodes

On Sun, Oct 19, 2025 at 07:01:30PM +0300, Dmitry Baryshkov wrote:
> On Wed, Oct 15, 2025 at 12:27:03PM +0530, Manivannan Sadhasivam wrote:
> > From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> > 
> > Enable passive cooling for CPUs in the X1E80100 SoC by adding the
> > '#cooling-cells' property. This will allow the OS to mitigate the CPU
> > power dissipation with the help of SCMI DVFS.
> 
> #cooling-cells isn't enough, the devices need to be listed in the
> thermal maps.
> 

Not strictly required unless the cooling device and trip points are wired in DT.
But I don't want to do that yet, and just expose the cooling devices to
userspace so that I can experiment with something like thermal-daemon.

- Mani

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