linux-kernel - Re: [PATCH 1/6] ARM: dts: exynos: Add all CPUs in cooling maps

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Message-ID: <20181118141455.GA11419@kozik-lap>
Date:   Sun, 18 Nov 2018 15:14:55 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Kukjin Kim <kgene@...nel.org>, devicetree@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] ARM: dts: exynos: Add all CPUs in cooling maps

On Fri, Nov 16, 2018 at 03:31:10PM +0530, Viresh Kumar wrote:
> 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>
> ---
>  arch/arm/boot/dts/exynos3250-artik5.dtsi      |   6 +-
>  arch/arm/boot/dts/exynos3250-monk.dts         |   6 +-
>  arch/arm/boot/dts/exynos3250-rinato.dts       |   6 +-
>  arch/arm/boot/dts/exynos4210-trats.dts        |   4 +-
>  arch/arm/boot/dts/exynos4210.dtsi             |   2 +-
>  .../boot/dts/exynos4412-itop-scp-core.dtsi    |   8 +-
>  arch/arm/boot/dts/exynos4412-midas.dtsi       |   8 +-
>  .../boot/dts/exynos4412-odroid-common.dtsi    |   8 +-
>  arch/arm/boot/dts/exynos4412-odroidu3.dts     |  17 ++-
>  arch/arm/boot/dts/exynos4412.dtsi             |   6 +-
>  arch/arm/boot/dts/exynos5250.dtsi             |   7 +-
>  arch/arm/boot/dts/exynos5422-odroidhc1.dts    | 106 +++++++++++-------
>  .../boot/dts/exynos5422-odroidxu3-common.dtsi | 106 +++++++++++-------

Thanks, applied.

Best regards,
Krzysztof