On Thu, Dec 02, 2021 at 05:56:38PM -0300, Fabio Estevam wrote:
The part that Francesco quoted:
"A Precharge All command must be issued prior to the MRW command to ensure robust DDR initialization. This command is required to be issued to both chip selects if two chip selects are utilized in the system."
Does not apply to mx6sabresd as it only has one chip select.
I think that this applies even with just one chip select, it is just prescribing a procedure and explicitly saying that it must be done for all the chip select in use, either 1 or 2.
Not sure if this is the reason for the sporadic failures I'm debugging, what triggered my attention was that this is supposed to be needed for a more "robust" initialization, whatever that means ...
Francesco