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

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Date:	Wed, 17 Feb 2016 12:31:05 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Kukjin Kim <kgene@...nel.org>,
	Lukasz Majewski <l.majewski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Javier Martinez Canillas <javier@....samsung.com>
Subject: Re: [RFC 1/3] ARM: dts: Add cooling levels for CPUs on exynos5420

On 17-02-16, 15:55, Krzysztof Kozlowski wrote:
> 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>
> ---
>  arch/arm/boot/dts/exynos5420-cpus.dtsi | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos5420-cpus.dtsi b/arch/arm/boot/dts/exynos5420-cpus.dtsi
> index 261d25173f61..498ae82e1cb2 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>;
> +			#cooling-cells = <2>; /* min followed by max */
>  		};
>  
>  		cpu1: cpu@1 {
> @@ -70,6 +73,9 @@
>  			clock-frequency = <1000000000>;
>  			cci-control-port = <&cci_control0>;
>  			operating-points-v2 = <&cluster_a7_opp_table>;
> +			cooling-min-level = <0>;
> +			cooling-max-level = <7>;
> +			#cooling-cells = <2>; /* min followed by max */
>  		};

Though it wouldn't matter (for the issue you are getting), but this should be
added for all the CPUs in case some other CPU is booted first.

-- 
viresh