On 08/29/2013 06:02 PM, Kevin Hilman wrote:
On Thu, Aug 29, 2013 at 3:43 PM, Russ Dill <Russ.Dill@xxxxxx> wrote:
On Thu, Aug 29, 2013 at 3:20 PM, Kevin Hilman <khilman@xxxxxxxxxx> wrote:
Dave Gerlach <d-gerlach@xxxxxx> writes:
[...]
The working repo for this version of the patch series can be found here:
git://github.com/dgerlach/linux-pm.git am335x-3.11rc4-suspend-resume
I tried this branch on my beaglebone black, and it's not fully resuming.
Suspend seems to be working (power draw goes from ~1W to ~130mW) and
pressing a key on the UART seems to be waking up the SoC (power draw
goes to ~600mW) but I don't ever get the console back.
Is there a specific version of the firmware I should be using?
Kevin
Kevin, I agree there does seem to be some issues with Beaglebone
black. I can confirm it works on BeagleBone White and the large am335
EVM, I am working on pinpointing the issue on beaglebone black, seems
that support isn't quite there yet.
OK, I tried the above branch on my BB white, using prebuilt firmware
from the next3 branch of the am33x-cm3 repo and it's suspending/resuming
fine. Thanks for the pointer.
FYI, measuring at the 5V supply, it goes from ~1.6W at idle down to
~700mW in suspend. The black goes from ~1W down to an impressive 130mW
but of course, it doesn't wake up so maybe it's not that impressive. ;)
Just a reminder, the next3 firmware is built to be compatible with
older kernel revisions whereas the next2 firmware is not. In order for
that compatibility to work, the CMD_ID_DS0 that mainline uses should
change from 0x3 to 0x4
Thanks, i switched to the next2 firmware since I'm only using current kernels.
Kevin
Kevin,
Thanks for taking the time to try this out, it does seem there are a few
kinks with BeagleBone Black but we'll get those worked out.
Regards,
Dave
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