RTC backup on omap3 (overo)

[Gerber Patrick]

Hello every one,

I am using an over Fire with an omap3530. I have added a small Lithium backup battery to the TWL4030 for RTC backup as recommanded by Gumstix.
I have tried to set the time with date command and shutdown the overo and remove power. After restart the date is not the one that I have set but a default one (always the same).

Does anybody have already experienced this ? Do you have any idea ?

Thanks in advance

Patrick