Re: Beagle PM hangs

[Kevin Hilman <khilman@deeprootsystems.com>]

Richard,

"Woodruff, Richard" <r-woodruff2@ti.com> writes:

>>   I wait for a min and try to wakeup - It works.
>>
>>   If i wait a little longer before waking it up say, 3 or 4 minutes.
>> It does not wakeup.
>
> That is consistent with your memory not being placed into self refresh properly.
>
> 5 general bugs I've seen over time:
>         sw bug:
>                 - ctrl sequence issue before sleep
>                 - CKE balls not muxed correctly
>                 - crash on unexpected wake path
>         chip bug:
>                 - (3430 >= es3 requires a errata sequence to work)
>         board bug:
>                 - hooking ddr-chip-CKE wrongly or a way OMAP doesn't support like sharing between dies.

Another possibility is that the the memory timings for the custom
board are not set correctly.

Richard, Do you have pointers to CDP/zoom code that has a workaround
for the 3430 > es3 errata as well as the 'ctrl sequence issue' you
mentioned?

Kevin