Hi Santosh,
On Tue, Jan 08, 2013 at 21:01:51, Shilimkar, Santosh wrote:
Vaibhav,
On Monday 31 December 2012 06:36 PM, Vaibhav Bedia wrote:
Hi,
This is the second version of the patch series for adding suspend-resume
support for AM33XX. Based on the feedback received on the previous patch
series [1] almost all the patches have undergone a bit a rework.
The 1st two patches depend on the changes for mailbox code migration
from arch/arm/*-omap*/ to drivers/mailbox/ [2].
The patch series also depends on recent changes to the OMAP PM framework
by Paul Walmsley.
I found it easiest to apply the AM33XX suspend-resume patches on top of
Paul's TEST_pwrdm_post_fpwrst_devel_a_3.9 branch + the patches @ [2].
With these dependencies met, the PM code uses the firmware interface
and expects the userspace to load the WKUP_M3 binary before the
suspend-resume functionality is made available. The binary file (and
the source-code for WKUP_M3) can be obtained from the 'next' branch at
[3]. The WKUP_M3 binary can either be loaded post bootup via
the sysfs entry './sys/devices/ocp.2/wkup_m3.4/firmware' or
it can be included in the kernel image as part of the build process.
DDR3 specific changes have been skipped for now since mainline U-Boot
exhibited stability issues on all the DDR3 based AM335x boards that i could
lay my hands on.
I have done basic testing along with power measurments on the different
power rails on the AM335x EVM. PER domain transition on the BeagleBone fails
if the CPSW driver is included in the kernel and is yet to be root caused.
Along with this issue more extensive testing on other OMAP platforms is also
pending right now.
For more details on the AM335x suspend-resume support please refer to the
changelog in the different patches.
I still haven't reviewed patch 15, 16 and 18 which adds suspend support.
Will do that in coming days since they need a bit a closer look.
But as mentioned in some of the patches, you need to split this series
since except 15, 16 and 18 which adds suspend support, rest of the
patches are
- data file fixes
- timer suspend/resume update
- mailbox support, control module update.
Would be good to split the series to help the reviews.
Sure. I'll split it up like you mentioned. Since all these changes are needed
for
a working suspend-resume I kept it in a single series to reduce dependencies and
also to help set an initial context for the AM33xx PM changes.
Regards,
Vaibhav
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