linux-kernel - Re: [PATCH] ARM: exynos_defconfig: Enable big.LITTLE CPUidle support

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Message-ID: <55E02A32.2070902@osg.samsung.com>
Date:	Fri, 28 Aug 2015 11:30:26 +0200
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	linux-kernel@...r.kernel.org
Cc:	Kukjin Kim <kgene@...nel.org>, Thierry Reding <treding@...dia.com>,
	Anand Moon <linux.amoon@...il.com>,
	Russell King <linux@....linux.org.uk>,
	linux-samsung-soc@...r.kernel.org,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: exynos_defconfig: Enable big.LITTLE CPUidle support

Hello Sjoerd,

On 08/28/2015 10:51 AM, Sjoerd Simons wrote:
> On Fri, 2015-08-28 at 10:16 +0200, Javier Martinez Canillas wrote:
>> Some Exynos big.LITTLE boards (i.e: Exynos5420 and Exynos5800 based
>> Chromebooks) have proper firmware that allow the big.LITTLE CPUidle
>> driver to work correctly, so enable support for this.
>>
>> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
>>
>> ---
>> Kukjin and Krzysztof,
>>
>> As you know there are other boards like the Exynos5422 based Odroid 
>> XU{3,4}
>> whose firmware is broken due leaving CCI in secure mode which means 
>> that the
>> kernel MCPM support can't properly manage CCI.
>>
>> So if you pick this patch, it should be tested in kernelci before 
>> appearing
>> in linux-next to prevent any boot issues.
> 
> I've pushed this patch into Collabora's for-next branch, which should
> get picked up by kernelci soonish.
>

Awesome, thanks a lot for your help!
 
Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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