linux-kernel - Re: [PATCH v2 1/3] ARM: dts: Add cooling levels for CPUs on exynos5420

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Message-ID: <87h9h599zi.fsf@e105922-lin.cambridge.arm.com>
Date:	Thu, 18 Feb 2016 17:58:09 +0000
From:	Punit Agrawal <punit.agrawal@....com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Kukjin Kim <kgene@...nel.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, Lukasz Majewski <l.majewski@...sung.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH v2 1/3] ARM: dts: Add cooling levels for CPUs on exynos5420

Hi Krzysztof,

Krzysztof Kozlowski <k.kozlowski@...sung.com> writes:

> On Exynos5420 we support 8 cpufreq steps (600-1300 MHz) for LITTLE and
> 12 steps for big core (700-1800 MHz). Add respective cooling cells.
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
>
> ---
>
> Changes since v1:
> 1. Add cooling properties to all CPUs (suggested by Viresh).
> ---
>  arch/arm/boot/dts/exynos5420-cpus.dtsi | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5420-cpus.dtsi b/arch/arm/boot/dts/exynos5420-cpus.dtsi
> index 261d25173f61..5c052d7ff554 100644
> --- a/arch/arm/boot/dts/exynos5420-cpus.dtsi
> +++ b/arch/arm/boot/dts/exynos5420-cpus.dtsi
> @@ -33,6 +33,9 @@
>  			clock-frequency = <1800000000>;
>  			cci-control-port = <&cci_control1>;
>  			operating-points-v2 = <&cluster_a15_opp_table>;
> +			cooling-min-level = <0>;
> +			cooling-max-level = <11>;

Although the above two properties are defined they aren't parsed in the
kernel.

Setting min / max extents for cooling devices via cooling maps does work
though.


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