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OMAP35xx: Suspend / Resume not working on custom board

Niclas Knuts
Intellectual 655 points
Other Parts Discussed in Thread: OMAP3503, OMAP3530

Hi Guys,

I am having some issues with suspend  / resume (ans also halt / shutdown) on a OMAP3503 / OMAP3530.For some reason the OMAP (or it could be the TPS circuit) fails to go to suspend mode. I am checking with a amp meter to see what the current draw is.

Could it be that something prevents it from going to suspend mode? My assumption is that it should draw very little current when in suspend mode. Also after running "echo mem > /sys/power/state" the board doesn't resume. Which are the default resume actions?

root@beagleboard:/# echo mem > /sys/power/state
[  526.810852] PM: Syncing filesystems ... done.
[  526.861755] Freezing user space processes ... (elapsed 0.01 seconds) done.
[  526.887603] Freezing remaining freezable tasks ... (elapsed 0.02 seconds) done.
[  526.918884] Suspending console(s) (use no_console_suspend to debug)

Kernel:

2.6.32

Distro:

The Angstrom Distribution beagleboard ttyS2
Angstrom v2011.12 beagleboard ttyS2

Regards,

Nicce

  • 0
    Intellectual 655 points

    Also trying with following commands results in the system hanging:

    root@beagleboard:~# mkdir /debug
    root@beagleboard:~# mount -t debugfs debugfs /debug
    root@beagleboard:~# echo 5 > /debug/pm_debug/wakeup_timer_seconds
    root@beagleboard:~# echo mem > /sys/power/state

    [   87.433319] PM: Syncing filesystems ... done.
    [   87.470947] Freezing user space processes ... (elapsed 0.01 seconds) done.
    [   87.496887] Freezing remaining freezable tasks ... (elapsed 0.02 seconds) done.
    [   87.528228] Suspending console(s) (use no_console_suspend to debug)

    Regards,

    Nicce

  • 0 in reply to Niclas Knuts
    Intellectual 655 points

    Register Dump:

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    MOD: CM_USB (48005400)

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