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Date:   Fri, 25 May 2018 14:10:25 -0700
From:   Olof Johansson <olof@lixom.net>
To:     Viresh Kumar <viresh.kumar@linaro.org>
Cc:     arm@kernel.org, Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Carlo Caione <carlo@caione.org>,
        Kevin Hilman <khilman@baylibre.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        ionela.voinescu@arm.com,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        chris.redpath@arm.com, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/6] arm64: dts: amlogic: Add missing cooling device
 properties for CPUs
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On Fri, May 25, 2018 at 11:10:01AM +0530, Viresh Kumar wrote:
> The cooling device properties, like "#cooling-cells" and
> "dynamic-power-coefficient", should either be present for all the CPUs
> of a cluster or none. If these are present only for a subset of CPUs of
> a cluster then things will start falling apart as soon as the CPUs are
> brought online in a different order. For example, this will happen
> because the operating system looks for such properties in the CPU node
> it is trying to bring up, so that it can register a cooling device.
> 
> Add such missing properties.

This seems awkward compared to just having one cooling-cells in the /cpus node
instead.

What's it used for? I don't see any properties in the device nodes on meson-gxm
that have any cooling-foo cells in them? So why should #cooling-cells be
needed?


-Olof