linux-kernel - Re: [PATCH v3 3/5] ARM: Exynos: switch to using generic cpufreq driver for Exynos4x12

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Date:	Mon, 03 Aug 2015 12:47:57 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Thomas Abraham <thomas.ab@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Kevin Hilman <khilman@...aro.org>,
	Javier Martinez Canillas <javier@...hile0.org>,
	Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>,
	Anand Moon <linux.amoon@...il.com>,
	linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Javier Martinez Canillas <javier@....samsung.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>
Subject: Re: [PATCH v3 3/5] ARM: Exynos: switch to using generic cpufreq driver
 for Exynos4x12

On Monday, August 03, 2015 04:10:44 PM Viresh Kumar wrote:
> On 03-08-15, 12:36, Bartlomiej Zolnierkiewicz wrote:
> > I would really like it to be dependency not an option (+ I think
> > that ideally it should be checked at runtime, IOW we should be
> > checking from cpufreq-dt driver if the thermal support is enabled
> > before enabling boost support).
> 
> I don't think boost has any dependency on thermal support. Yeah, it
> may be true for your platform but we can't force it. People might have
> different algorithms to control boost modes, thermal is just one
> option they may look at. For few, enabling boost may not be a thermal
> issue, but power. So, they want to allow it only when they want, but
> that wouldn't burn their chip.

OK, I see your point (I have not thought about power being the boost
limitation previously).

> So, a platform can choose how it wants to have it. :)

I'll re-do this patch.  Thank you.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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