Hi Beonit, > From: Cousson, Benoit > Sent: Thursday, October 22, 2009 3:59 AM > To: Woodruff, Richard; Paul Walmsley; Nayak, Rajendra > >It is not guaranteed safe to write actim registers on the fly to an active > >part. It is safe to do RFR as it is buffered and sent out at a safe time. > > I think that what Paul is suggesting is to change the ACTIM after ensuring > that the DDR is in self-refresh. In that case it is perfectly valid; it is > just tricky to ensure that all initiators are in mute before doing that. Yes that is true, however, ... That is not the way the code is setup and it’s a long way from that. Run time pause of drivers is a minefield. With out a broad notifier they best you would hope for is some opportunistic change time (against full system). You wouldn't have a guaranteed way to speed them up again where you need them most at high opp. Some minimal kernel not using dma and the like could do it but that is probably more misleading to put in the tree than something useful for most. Regards, Richard W. -- 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
