On Wed, 15 Oct 2008, Högander Jouni wrote: > L3 and L4 are anyway on when not in wfi, because of sleep/wkdep, so no > power save. This is the case at least with OMAP3 not sure about OMAP2. I thought that disabling the iclken bit still disabled some gates in the OCP interface. Richard, do you know if that is the case? > > There also was some discussion last year that modules like GPTIMER can > > have their functional clocks enabled, but their interface clocks disabled > > when register access is not needed. Wakeups from the module are still > > sent asynchronously to the PRCM. Again the motivation is to save power. > > I don't think the current code tries to do this. > > > > In many modules there is also possibility to gate ick by HW when not > in wfi (see AUTOIDLE in SYCONFIG). I'm not sure about this but > extremely also fcks could be taken care by HW (see CLOCKACTIVITY in > SYSCONFIG). How will the PRCM know when the device driver is accessing the module registers? - Paul
