Re: [PATCH] cpufreq: suspend/resume governors with PM notifiers

[viresh kumar]

On Saturday 16 November 2013 05:54 AM, Rafael J. Wysocki wrote:
> Will cpufreq work during system-wide power transitions (suspend/resume etc.)
> after this?  In particular, what about hibernation?

I am disabling governors as soon as we start suspend. So No, cpufreq wouldn't
work during suspend/resume. But once system is resumed we are starting it back
again.

Hibernation is probably not supported by my code yet.. I just went through
hibernation code quickly and it looks we don't send PM_SUSPEND_PREPARE or
PM_POST_SUSPEND notifications in case of hibernation. Correct?

And these are the notifications that we send:
- PM_HIBERNATION_PREPARE
- PM_POST_HIBERNATION
- PM_RESTORE_PREPARE
- PM_POST_RESTORE

If I am not wrong I need to stop governors on PM_HIBERNATION_PREPARE and need to
start them back on: PM_POST_HIBERNATION (I am a bit confused with this one. Does
this POST_HIBERNATION one happens at the end of going into hibernation? or after
booting back? I need a notifier at the end of restore)..

--
viresh
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