linux-kernel - Re: [PATCH 01/10] ARM64: dts: amlogic: Add all CPUs in cooling maps

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Date:   Wed, 28 Nov 2018 16:35:03 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, arm@...nel.org,
        Carlo Caione <carlo@...one.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>, devicetree@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/10] ARM64: dts: amlogic: Add all CPUs in cooling maps

Viresh Kumar <viresh.kumar@...aro.org> writes:

> Each CPU can (and does) participate in cooling down the system but the
> DT only captures a handful of them, normally CPU0, in the cooling maps.
> Things work by chance currently as under normal circumstances its the
> first CPU of each cluster which is used by the operating systems to
> probe the cooling devices. But as soon as this CPU ordering changes and
> any other CPU is used to bring up the cooling device, we will start
> seeing failures.
>
> Also the DT is rather incomplete when we list only one CPU in the
> cooling maps, as the hardware doesn't have any such limitations.
>
> Update cooling maps to include all devices affected by individual trip
> points.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Queued for v4.21,

Thanks!

Kevin