On Mon, 7 Jul 2014, Tony Lindgren wrote:

With v3.16-rc4 the PM features for omap3 should be working
finally for device tree based booting. At lest beaglexm and
3xxevm should work.

Maybe you are using legacy booting path to idle the UARTs still?

FYI, I'm doing this to find the UART entries:

uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d)
for uart in $uarts; do
        echo 3000 > $uart/autosuspend_delay_ms
done

uarts=$(find /sys/class/tty/ttyO*/power/ -type d)
for uart in $uarts; do
        echo enabled > $uart/wakeup
        echo auto > $uart/control
done

echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode

OK thanks, I'll take a close look at it.  It's not using the legacy paths, 
but based on a glance at the 37xxevm logs, it looks like the bus address 
of the UART isn't right.


- Paul