On 02:46-20130614, Paul Walmsley wrote: > cc Kevin, Vaibhav > > On Thu, 13 Jun 2013, Rajendra Nayak wrote: > > > The powerdomain framework today expects to always have a voltagedomain > > associated with a given powerdomain. We already have AM33xx which > > has no Voltage Controller/Voltage Processor as part of PRCM. > > There are more SoCs' to follow starting with AM437x and DRA7xx > > which do not have VC/VP. > > > > Instead of adding dummy voltage domain data files, make the powerdomain > > framework aware of the fact that some SoCs' might not really have > > scalable voltage domains. > > Fine with me in principle if AM335x doesn't support voltage scaling. > Vaibhav, if this is okay for you, please ack it. just a nitpick :) There is no VFSM auto scaling to retention voltage, nor is VC-VP IP available here, but that does not mean DVFS voltage scaling does not exist - it is done with traditional regulator framework using regular shared I2C. We now seem to be moving to a generation of SoCs where VC-VP has been dumped in favor of allowing integration with PMIC which may talk SPI/I2C over standard interfaces - this allows us to reach better product options, but gives up on extreme low power scenarios we had seen in the past on OMAP. Overall, I love this idea. Acked-by: Nishanth Menon <nm@xxxxxx> > > Then, in terms of merging, probably Kevin would be the right person for > this since he's done much of the voltagedomain work. -- Regards, Nishanth Menon -- 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
