[PATCH v4 0/3] i2c: designware: Runtime PM aware system sleep handling

Rafael J. Wysocki
2017-09-24T23:13:29Z

Hi,

The original purpose of this set was as stated below:

On Wednesday, September 6, 2017 1:41:37 AM CEST Rafael J. Wysocki wrote:
> On Monday, September 4, 2017 1:05:57 AM CEST Rafael J. Wysocki wrote:
> > Hi,
>
> An update related to the dependency on intel-lpss.
>
> > The point here is to avoid runtime resuming i2c designware devices during
> > system suspend in the driver's ->suspend callback in the case when the
> > ACPI PM domain is not present. That will allow us to deal with the
> > ACPI PM domain case going forward, among other things.
> >
> > The first patch cleans up the runtime PM handling in the i2c-designware-platdrv
> > _probe() routine so as to make it enable runtime PM in all cases, but prevent
> > the device from being runtime suspended via pm_runtime_forbid() if
> > pm_disabled is set.
>
> The second one pushed the intel-lpss system suspend/resume callbacks to the
> late/early stages of suspend/resume, respectively, so that the i2c-designware-platdrv
> ones can be pushed too.
>
> > The second one get rids of some ugly code and makes the PM callbacks of the
> > driver handle runtime-suspended devices during system suspend/resume.
>
> This is the third one and it does less than it did before now.
>

In the meantime, though, Rajat reported that there actually were problems with
i2c-designware being suspended too early (as in some cases dependent device
drivers attempted to use i2c during the late suspend phase of system suspend),
so here it goes again as a fix.

Patches [1-2/3] have not changed since v3 (other than by acquiring tags) and
patch [3/3] has only been rebased on top of 4.14-rc1 (and has acquired some
tags too).

Thanks,
Rafael