Re: [PATCH v2 0/5] PM: domains: Add helpers for multi PM domains to avoid open-coding

Greg Kroah-Hartman
2024-01-26T19:07:58Z

On Fri, Jan 26, 2024 at 05:12:12PM +0100, Ulf Hansson wrote:
> On Fri, 5 Jan 2024 at 17:01, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> >
> > Updates in v2:
> > - Ccing Daniel Baluta and Iuliana Prodan the NXP remoteproc patches to
> > requests help with testing.
> > - Fixed NULL pointer bug in patch1, pointed out by Nikunj.
> > - Added some tested/reviewed-by tags.
> >
> >
> > Attaching/detaching of a device to multiple PM domains has started to become a
> > common operation for many drivers, typically during ->probe() and ->remove().
> > In most cases, this has lead to lots of boilerplate code in the drivers.
> >
> > This series adds a pair of helper functions to manage the attach/detach of a
> > device to its multiple PM domains. Moreover, a couple of drivers have been
> > converted to use the new helpers as a proof of concept.
> >
> > Note 1)
> > The changes in the drivers have only been compile tested, while the helpers
> > have been tested along with a couple of local dummy drivers that I have hacked
> > up to model both genpd providers and genpd consumers.
> >
> > Note 2)
> > I was struggling to make up mind if we should have a separate helper to attach
> > all available power-domains described in DT, rather than providing "NULL" to the
> > dev_pm_domain_attach_list(). I decided not to, but please let me know if you
> > prefer the other option.
> >
> > Note 3)
> > For OPP integration, as a follow up I am striving to make the
> > dev_pm_opp_attach_genpd() redundant. Instead I think we should move towards
> > using dev_pm_opp_set_config()->_opp_set_required_devs(), which would allow us to
> > use the helpers that $subject series is adding.
> >
> > Kind regards
> > Ulf Hansson
>
> Rafael, Greg, do have any objections to this series or would you be
> okay that I queue this up via my pmdomain tree?

I'll defer to Rafael here.