[PATCH] ARM: tegra: Enable CPUFreq support for Tegra124 Chromebooks

Jon Hunter jonathanh at nvidia.com
Wed Nov 4 04:19:56 PST 2015

Correcting Mikko's email ...

On 04/11/15 12:16, Jon Hunter wrote:
> On 15/09/15 10:00, Tomeu Vizoso wrote:
>> On 15 September 2015 at 10:12, Thierry Reding <thierry.reding at gmail.com> wrote:
>>> On Thu, Sep 03, 2015 at 03:40:45PM +0200, Tomeu Vizoso wrote:
>>>> On 13 July 2015 at 15:08, Jon Hunter <jonathanh at nvidia.com> wrote:
>>>>> On 03/06/15 12:44, Jon Hunter wrote:
>>>>>> Adding LAKML. Jon
>>>>>> On 03/06/15 12:43, Jon Hunter wrote:
>>>>>>> Add the device-tree DFLL clock node and CPU regulator phandle for
>>>>>>> tegra124 chromebooks to enable CPUFreq support on these boards.
>>>> Ping.
>>>> Thanks,
>>> Sorry that this has gone unnoticed for so long. I've applied it now to
>>> the for-4.4/dt branch.
>>> Tomeu, do you want me to add your Tested-by, Reviewed-by or Acked-by
>>> before I push this out?
>> I haven't done proper tests, but I have tested for several weeks a
>> branch containing these changes on a nyan-big and have found no
>> issues.
>> You can add my Reviewed-by though. Sorry for not having made this clear.
> I have noticed that system suspend to LP1 is not working on the nyan-big
> with linux-next and never exits suspend. It appears that this patch is
> the culprit. I tested cpufreq was changing the frequency as expected but
> I did not test suspend.
> I have tested suspend on the jetson-tk1 with linux-next that also has
> cpufreq enabled and do not see any problems.
> Adding Mikko ... Mikko do you know of any reason why cpufreq could cause
> problems with suspend? I am guessing it is to do with the different
> clock used for the CPUs. Any thoughts?
> Tomeu, have you tried suspend on a nyan-big with next?
> I am testing with "rtcwake -d rtc1 -m mem -s 5".
> Thierry, we may need to comment out these changes for 4.3 or revert this
> patch altogether.
> Cheers
> Jon
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