[PATCH RFC 0/8] Devfreq support for Exynos5250/5420

[Abhilash Kesavan]

Dear Myungjoo,

On Mon, Apr 28, 2014 at 7:04 AM, MyungJoo Ham <myungjoo.ham at samsung.com> wrote:
>> This patchset adds devfreq support on Exynos5250 and Exynos5420.
>> The patches add the missing INT clock support for exynos5250 and
>> also add a new 5420 driver. We also have patches which add the PPMU
>> node and fix a typo in the exynos5250 driver.
>>
>> The patches have been tested on Exynos5250 based Snow board and SMDK5420
>> EVT1 boards. They have been prepared on linux-next(20140424) with the
>> devfreq for-next branch and Shaik Ameer Basha's clock cleanup patches
>> merged (http://www.spinics.net/lists/arm-kernel/msg325313.html).
>>
>> There are a couple of concerns with these patches:
>> 1) The patches are using clock aliases to expose the required clocks to the
>> devfreq driver.
>> 2) The patches are making use of different compatible strings for the PPMU
>> node to differentiate between multiple SoCs even though the PPMU is the same.
>>
>> Kindly suggest a way to move forward with respect to the above.
>
> The Exynos PPMU drivers have been located in drivers/devfreq/exynos
> as devfreq drivers have been the only users of PPMU. There
> are developers trying to design common PPMU frameworks, including
> Chanwoo, it is not yet submitted.
>
> Because other Exynos5 SoCs have their bus/memif PPMU defined in
> drivers/devfreq/exynos, adding another ont in another directory
> seems not appropriate.
Thanks for your reply.
I agree with you, I would like to re-use the current exynos5 devfreq
driver code as far as possible for 5420 as well. I do see a post from
Chanwoo Choi (https://lkml.org/lkml/2014/3/12/171) regarding adding dt
support for exynos4. But, looks like there has not be any new patchset
for a while now.

Chanwoo, is there a plan to post a new version of your patchset ? I
would be interested in using the same for my work on exynos5.

Regards,
Abhilash
>
>
> Cheers,
> MyungJoo.
>