On Tue, Jan 31, 2012 at 1:19 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > On Tue, 31 Jan 2012, Shilimkar, Santosh wrote: > >> A week back I was discussing with Benoit and Tony about having some >> infrastructure like "unused clocks" so that we can shutdown those >> modules, and if possible some power domains. That way they get >> removed at one single place and they the power domain calls >> need not iterate over the once which are no longer needed. > > Sure, if you have some ideas, that sounds promising. I'd assume the main > performance issues would be related to global PRCM register reads, rather > than raw CPU cycles. So that's probably where it would make sense to > focus the effort. > I fully agree that PRCM register read time is the main issue. Would discuss this with Benoit and Rajendra bit more on what we can be done. > We should also be able to optimize out a fair number of the powerdomain > register reads if we cache them in the struct powerdomain. The current > powerstate and next powerstate seem to be hit a lot, and those should both > be cacheable. Will probably do some of this as part of the functional > powerstate code. > PD register caching seems to be a good optimization. Regards Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
