On 05/01/2010 03:12 AM, Shilimkar, Santosh wrote: >> -----Original Message----- >> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Kevin >> Hilman >> Sent: Saturday, May 01, 2010 3:36 AM >> To: Cliff Brake >> Cc: Peter Tseng; linux-omap@xxxxxxxxxxxxxxx >> Subject: Re: ARM suspend to disk? >> >> Cliff Brake <cliff.brake@xxxxxxxxx> writes: >> >>> On Thu, Apr 29, 2010 at 1:58 PM, Kevin Hilman >>> <khilman@xxxxxxxxxxxxxxxxxxx> wrote: >>> >>>> What do you expect to gain from suspend-to-disk + snapshot boot that >>>> you don't already get from suspend-to-RAM using off-mode? >>>> >>>> On OMAP, with off-mode enabled, a suspend to RAM puts the entire OMAP >>>> into full-chip off, and essentially reboots the ARM when waking up >>>> from suspend (or idle) already. >>> >>> What does the resume process look like in off mode? Does the resume >>> pass through the bootloader? If so, are the bits that detects resume >>> from "off" available in U-boot? >> >> No, it does not pass through the boot loader. >> >> In general terms, resume from off-mode is the same to "normal" resume (from >> retention) except that some additional state has to be restored before >> continuing where you left off since the ARM core (as well as most the >> OMAP itself) was turned off. >> > On suspend to disk topic, Raghu under Romit's guidance did a > prototype few months back as part of his internship using some of the earlier > ARM work. The whole system snapshot was stored to the MMC card and one > can take that MMC card on another board and continue from where it was suspended. > > We should have these patches somewhere. > It would be interesting to see these. Are you able to find these patches somewhere? Peter -- 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
