On Mar 18, 2009, at 3:01 PM, Kevin Hilman wrote:
Nicholas Chen <nchen@xxxxxxxxxx> writes:
I recently checked out the latest PM branch from your git repository
and put it on the Beagleboard (B5). I have been largely able to
reproduce the results others have reported on this PM thread,
...not sure what "this PM thread" you are referring to?
but I believe my CORE and PER powerdomains are not hitting RET or
OFF.
I think this based on the following:
after I
echo 1 > enable_off_mode
echo 1 > sleep_while_idle
echo mem > state
CORE and PER are still on because UART clocks are not being cut in
idle:
# echo 1 > /sys/power/clocks_off_when_idle
And see if that works. Also at least on my Beagle, I am not able
to resume from full-chip OFF, so for starters I suggest just testing
retention: echo 0 > /sys/power/enable_off_mode
Suspending starts but upon resume I see the following:
...
Powerdomain (core_pwrdm) didn't enter target state 0
Powerdomain (per_pwrdm) didn't enter target state 0
Could not enter target state in pm_suspend
looking at debug/pm_debug/count/
I see that only the core_pwrdm and per_pwrdm have 0's next to OFF:
and
RET:
Based on the thread, the resolution seems to be to disable USB and
upgrade u-boot. I think I have done both. My u-boot is 2009.03-rc2
from Steve Sakoman's tree, and I have disabled USB support in my
Kernel build. Is there something that I am overlooking? Also, I'm
curious if the two powerdomains linked (i.e. I need to fix PER before
CORE will shut off or vice versa).
For your problem, they're linked in that they both contain a UART
block. UART1,2 are in CORE and UART3 is in PER.
Kevin
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Thanks for the assistance. I see everything going into RET now, so I
think I'm duplicating what everybody else is seeing. I also have a
better understanding what the entries in /sys/power do now.
Nick
PS
Sorry, the thread/message I am referring to is:
http://markmail.org/message/4cynvcjzult4c2rj
From Feb 4.
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