Re: Suspend/Resume questions

[Peter Barada <peterb@logicpd.com>]

On Mon, 2009-01-12 at 19:26 +0100, Koen Kooi wrote:
> Op 12 jan 2009, om 18:11 heeft Peter Barada het volgende geschreven:
> 
> >
> > I'm using the current PM branch (2.6.28-rc8, revision 2beb9b4b) to
> > investigate power consumption on an OMAP35x board (Logic's LV SOM).
> >
> > When I:
> >
> > # mount -t vfat /dev/mmc0blkp1 /mnt/sdcard
> > # echo mem > /sys/power/state
> > PM: Syncing filesystems ... done.
> > Freezing user space processes ... (elapsed 0.00 seconds) done.
> > Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
> > omapfb omapfb: timeout waiting for FRAME DONE
> > mmc0: card 133b removed
> > MMC: killing requests for dead queue
> > cpufreq: suspend failed to assert current frequency is what timing  
> > core
> > thinks it is.
> > Powerdomain (iva2_pwrdm) didn't enter target state 1
> > Powerdomain (core_pwrdm) didn't enter target state 1
> > Powerdomain (per_pwrdm) didn't enter target state 1
> > Could not enter target state in pm_suspend
> > cpufreq: resume failed to assert current frequency is what timing core
> > thinks it is.
> >
> > eth0: link down
> > soc-audio soc-audio: scheduling resume work
> > Restarting tasks ...
> > soc-audio soc-audio: starting resume work
> > soc-audio soc-audio: resume work completed
> > done.
> > omap3530# mmc0: new high speed SD card at address 133b
> > mmcblk1: mmc0:133b SD02G 1.91 GiB
> > mmcblk1: p1
> > eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
> >
> > omap3530# ls -l /dev/mmcblk0*
> > ls: /dev/mmcblk0*: No such file or directory
> > omap3530#
> >
> > 1) Is "echo mem > /sys/power/state" the proper method to put the board
> > into suspend?
> >
> > 2) Why does the MMC "move" from /dev/mmcblk0 before the suspend
> > to /dev/mmcblk1 after the suspend? (If the card is not mounted, it
> > doesn't "move").
> 
> Do you have CONFIG_MMC_UNSAFE_RESUME=y in your .config? It's basically  
> always needed if you suspend a mounted filesystem on MMC/SD.

(Dang HTML encoding bounced my last message, resending in plaintext).

Well, dip me in paint and color me pink - thanks, that works great!

Any ideas on my other question (i.e. how to code to get PWRON pin of the
TWL4030 to bring it out of suspend)?

> regards,
> 
> Koen
> 
> >
-- 
Peter Barada <peterb@logicpd.com>