From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
        Kukjin Kim <kgene@kernel.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Olof Johansson <olof@lixom.net>,
        Arnd Bergmann <arnd.bergmann@linaro.org>,
        "'Thomas Abraham'" <thomas.ab@samsung.com>,
        "'Sylwester Nawrocki'" <s.nawrocki@samsung.com>,
        "'Michael Turquette'" <mturquette@baylibre.com>,
        "'Tomasz Figa'" <tomasz.figa@gmail.com>,
        "'Lukasz Majewski'" <l.majewski@samsung.com>,
        "'Heiko Stuebner'" <heiko@sntech.de>,
        "'Chanwoo Choi'" <cw00.choi@samsung.com>,
        "'Kevin Hilman'" <khilman@linaro.org>,
        "'Javier Martinez Canillas'" <javier@dowhile0.org>,
        "'Tobias Jakobi'" <tjakobi@math.uni-bielefeld.de>,
        "'Anand Moon'" <linux.amoon@gmail.com>,
        linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org,
        linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/6] cpufreq: use generic cpufreq drivers for Exynos4x12
 platform
Date: Fri, 07 Aug 2015 13:31:15 +0200
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Hi,

On Friday, August 07, 2015 10:48:26 AM Viresh Kumar wrote:
> On 07-08-15, 13:52, Krzysztof Kozlowski wrote:
> > Thanks for explanation. As fair as I understand, Bartlomiej wanted to
> > merge this in a way which would avoid loosing the boost mode. Kukjin
> > prepared topic branches for previous cpu-freq/clk stuff so maybe
> > everything could go through PM?
> 
> We aren't loosing anything at all. There can be two cases here:
> 
> 1. Patch 1/6 and 6/6 make it to 4.3 (with suggested changes) via PM tree:
> - All will work fine in this case, no issues at all..
> 
> 2. They don't make it:
> - Even in this case, nothing will break. Users can just enable a
>   config option and that's all..

Users don't need to enable the config option to get boost
functionality working.  It is only needed to get scaling_boost_freqs
sysfs attribute visible (which lists available boost freqs) when
using cpufreq-dt driver.  Also the config option in question is not
user visible.

The worst thing that happens if these 2 PM patches don't make it
in time is that there will be no scaling_boost_freqs available
when using cpufreq-dt driver.  Which is not very important from
Exynos4x12 POV as it only supports single boost freq currently.

> So, no need to divert things into another tree this late.

I agree.

> Over that, Rafael will not be around for 2 weeks now (Plumbers and
> other stuff) ..
> 
> So, just target the cpufreq core changes via PM tree.. rest is just
> fine.
> 
> I hope that makes sense :)

Yes. :)
 
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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