SNVS_LP General Purpose Register in 1.3 silicon

[richogrady]

We use this register to write a value to communicate between our bootloader and recoveryOS.  It works fine in the solo and in the imx6D 1.2.  The same software is not working in the imx6D 1.3.  If I try to write to the register it always reads back a 0.  I also checked that neither lock bits are set.  What could be wrong?

[Yuri]

Hello,

  Please check if software changes / patches, mentioned in the EB803 are applied 
in Your case.

http://www.nxp.com/assets/documents/data/en/engineering-bulletins/EB803.pdf 

Have a great day,
Yuri

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[richogrady]

Yuri,

I did look at those, but I don't see that they could possibly have anything to do with the SNVS_LP register.

[Yuri]

Hello,

  The mentioned patches should be applied (actual) in order to avoid software side effects.

Is SNVS voltage proper  and satisfies power up sequence ? 

Regards,

Yuri.