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Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and 5422

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On 03-12-15, 11:26, Ben Gamari wrote:
> Viresh Kumar <viresh.kumar@linaro.org> writes:
> > But, before I start reviewing this series, I have few comments.
> > - We weren't able to use cpufreq-dt driver for big LITTLE platforms
> >   earlier, as it never had multi cluster support and we wanted
> >   clock-sharing information via DT.
> 
> Fair enough.
> 
> > - That is all fixed now.
> 
> I did not see any mention of this in the cpufreq-dt driver binding
> documentation, otherwise I would have tried going this route.
> 
> Do you have any references? I'd be happy to examine what would be
> necessary to go this route although, being an independent contributor,
> it may take time.

You wouldn't find in cpufreq-dt documentation as its not specific to
that. I have seen you DT patches now, and you have created the OPP
tables mostly correctly. Just create the cpufreq-platform device for
cpufreq-dt instead of arm-big-little one. And it should just work.

> > - I want Samsung's big LITTLE platforms to use cpufreq-dt and drop
> >   arm_big_little driver completely.
> 
> That sounds like a great direction going forward. However, I would still
> kindly request that you consider this series.
> 
> The existence of future plans of course does not change the fact that
> users have real hardware today; hardware that they have spent money on
> and would like to use. Cpufreq support has already been deferred once
> for similar reasons of interface churn which essentially forestalled
> working functionality from entering the kernel by eight months; I'd
> really like to avoid having this happen again.

I am not talking about any future plans here that need some work to be
done. Its all working today, you just need to use a different driver.

> Sounds reasonable to me. However, I'd just like to reiterate that this
> line of work can be pursued independently from the upstreaming of this
> series.

I think this is the right time to upstream the right solution. Just
try it once, if you face lots of difficulties or issues, then we can
ofcourse see..

NOTE: Check how OPP nodes are required to be created now in
linux-next. They should be named like opp@<freq-hz>. Something I
noticed in your DTs.

-- 
viresh
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[PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and 5422 Ben Gamari <ben@smart-cactus.org> - 2015-12-02 22:40 +0100
  [PATCH 11/12] cpufreq: arm-big-little: clarify frequency units Ben Gamari <ben@smart-cactus.org> - 2015-12-02 22:40 +0100
    Re: [PATCH 11/12] cpufreq: arm-big-little: clarify frequency units "Jon Medhurst (Tixy)" <tixy@linaro.org> - 2015-12-03 15:30 +0100
      Re: [PATCH 11/12] cpufreq: arm-big-little: clarify frequency units Ben Gamari <ben@smart-cactus.org> - 2015-12-03 15:40 +0100
  [PATCH 07/12] ARM: dts: Exynos5422: fix OPP tables Ben Gamari <ben@smart-cactus.org> - 2015-12-02 22:40 +0100
  [PATCH 01/12] cpufreq: arm_big_little: add cluster regulator support Ben Gamari <ben@smart-cactus.org> - 2015-12-02 22:40 +0100
    Re: [PATCH 01/12] cpufreq: arm_big_little: add cluster regulator support Anand Moon <linux.amoon@gmail.com> - 2015-12-03 05:50 +0100
  Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and  5422 Viresh Kumar <viresh.kumar@linaro.org> - 2015-12-03 07:10 +0100
    Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and 5422 Ben Gamari <ben@smart-cactus.org> - 2015-12-03 11:30 +0100
      Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and  5422 Viresh Kumar <viresh.kumar@linaro.org> - 2015-12-03 11:40 +0100
        Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and  5422 Viresh Kumar <viresh.kumar@linaro.org> - 2015-12-03 12:30 +0100
        Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and 5422 Ben Gamari <ben@smart-cactus.org> - 2015-12-03 12:30 +0100
        Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and 5422 Ben Gamari <ben@smart-cactus.org> - 2015-12-07 22:20 +0100
    Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and  5422 Sudeep Holla <sudeep.holla@arm.com> - 2015-12-03 12:10 +0100
      Re: [PATCH v5 0/12] cpufreq: Add support for Exynos 5800, 5420, and  5422 Viresh Kumar <viresh.kumar@linaro.org> - 2015-12-03 12:30 +0100

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