linux-kernel - Re: [PATCH] ARM: exynos_defconfig: Enable cpufreq-dt driver

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Message-ID: <55C98E17.9040303@osg.samsung.com>
Date:	Tue, 11 Aug 2015 07:54:31 +0200
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [PATCH] ARM: exynos_defconfig: Enable cpufreq-dt driver

Hello Krzysztof,

On 08/11/2015 04:15 AM, Krzysztof Kozlowski wrote:
> With the latest patches the cpufreq-dt can be used on multiple
> Exynos SoCs: 3250, 4210, 4212, 4412 and 5250.
> 
> Enable it along with default ondemand governor to conserve the energy,
> reduce temperature while maintaining acceptable performance.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> ---
>  arch/arm/configs/exynos_defconfig | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
> index 67965cedeb69..2263cd94cb93 100644
> --- a/arch/arm/configs/exynos_defconfig
> +++ b/arch/arm/configs/exynos_defconfig
> @@ -27,6 +27,8 @@ CONFIG_ARM_APPENDED_DTB=y
>  CONFIG_ARM_ATAG_DTB_COMPAT=y
>  CONFIG_CMDLINE="root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M console=ttySAC1,115200 init=/linuxrc mem=256M"
>  CONFIG_CPU_FREQ=y
> +CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
> +CONFIG_CPUFREQ_DT=y
>  CONFIG_CPU_IDLE=y
>  CONFIG_ARM_EXYNOS_CPUIDLE=y
>  CONFIG_VFP=y
> 

Reviewed-by: Javier Martinez Canillas <javier@....samsung.com>

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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