[GIT PULL 3/5] Samsung exynos cpuidle update for v3.17

[Chander M. Kashyap]

Hi Kukjin,

On Sat, Aug 9, 2014 at 6:05 AM, Kukjin Kim <kgene.kim at samsung.com> wrote:
> Kevin Hilman wrote:
>>
>> Hello,
>>
> Hi,
>
>> On Fri, Jul 18, 2014 at 5:52 PM, Kukjin Kim <kgene.kim at samsung.com> wrote:
>> > The following changes since commit 1795cd9b3a91d4b5473c97f491d63892442212ab:
>> >
>> >   Linux 3.16-rc5 (2014-07-13 14:04:33 -0700)
>> >
>> > are available in the git repository at:
>> >
>> >   git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git
>> > tags/exynos-cpuidle
>> >
>> > for you to fetch changes up to fc2cac41ebbfb16da8b036cba6ec6714ab780a6d:
>> >
>> >   ARM: EXYNOS: populate suspend and powered_up callbacks for mcpm
>> > (2014-07-19 03:36:00 +0900)
>> >
>> > ----------------------------------------------------------------
>> > exynos cpuidle update for v3.17
>> >
>> > - add callbacks exynos_suspend() and exynos_powered_up()
>> >   for support cpuidle through mcpm
>> > - skip exynos_cpuidle for exynos5420 because is uses
>> >   cpuidle-big-liggle generic cpuidle driver
>> > - add generic functions to calculate cpu number is used
>> >   for pmu and this is required for exynos5420 multi-cluster
>> > - add of_device_id structure for big.LITTLE cpuidle and
>> >   add "samsung,exynos5420" compatible string for exynos5420
>>
>> I'm curious what platforms this is expected to work on, and where it's
>> been tested.
>>
> exynos5420 and its reference board, smdk5420.
>
>> I tried it on exynos5800-peach-pi (chromebook2) and it hangs up (no
>> kernel messages) shortly after the driver loads, and never finishes to
>> boot.
>>
> Oh, sorry about that, if so, it should be fixed before -rc1. Just note that I
> thought since exynos5800 is very similar with exynos5420 so I didn't ask
> Chander to test the series on exynos5800 based board...Just asked to test with
> Nico's mcpm series. BTW, unfortunately I have no exynos5800-peach-pi...
>
>> I needed an extra compatible entry for the 5800 in the driver for the
>> driver to load, which suggests it hasn't been tested on 5800, but at
>> least in theory, this should be compatible with the 542x, right?
>>
> Yes I think so. As you can see in exynos5800.dtsi, it is including exynos5420.
>
>> For testing, I tried today's linux-next and arm-soc/for-next.
>>
> Hmm...why is the problem happened at last? Not at that time? :(

Patch has been sent for the same:
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/270472.html

This patch has been dropped as Tomasz has sent the fix in his patch.

Below is the link for the patch:

https://lkml.org/lkml/2014/8/1/103

which is yet to be merged.


>
> I need to figure it out...
>
> Thanks,
> Kukjin
>
>
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-- 
thanks and regards,
Chander M. Kashyap
Contact Number: +918123738320
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