[PATCH V3 0/8] PM / Sleep / Runtime: Fixup some driver's system suspend

[Ulf Hansson]

On 2 March 2014 00:38, Rafael J. Wysocki <rjw at rjwysocki.net> wrote:
> On Saturday, March 01, 2014 11:56:03 AM Ulf Hansson wrote:
>> Patch 1 -> 2:
>> These patches provides two new runtime PM helper functions which intend to be
>> used from system suspend/resume callbacks, to make sure devices are put into low
>> power state during system suspend and brought back to full power at system
>> resume.
>>
>> The prerequisite is to have all levels of a device's runtime PM callbacks to be
>> defined through the SET_PM_RUNTIME_PM_OPS macro, which means these are available
>> for CONFIG_PM.
>>
>> By using the new runtime PM helper functions especially the two scenarios below
>> will be addressed.
>>
>> 1) The PM core prevents .runtime_suspend callbacks from being invoked during
>> system suspend. That means even for a runtime PM centric subsystem and driver,
>> the device needs to be put into low power state from a system suspend callback.
>> Otherwise it may very well be left in full power state (runtime resumed) while
>> the system is suspended. By using the new helper functions, we make sure to walk
>> the hierarchy of a device's power domain, subsystem and driver.
>>
>> 2) Subsystems and drivers need to cope with all the combinations of
>> CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME. The two new helper functions smothly
>> addresses this.
>
> OK, I've queued up [1-2/8] for 3.15.  The rest generally didn't apply for me
> and I think it'd be better to push them through the respective subsystem trees
> later anyway.

Thanks Rafael!

Agree, regarding 3->8, they were at this point mostly included for
your reference.

Kind regards
Uffe

>
> Thanks!
>
> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.