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DM8168's ecc choose principle and nandflash bitflop problem.

Hi,TIer.

Now we found that some of our products can not Boot up in the custom's field.

If we reflash the Uboot,the problem disappear.

We read the problem nandflash,and found that somebits is different from the normal case.

I think it is a bit flop.

We have some questions:

Which Ecc we should choose?Hamming code or BCH8?

   For hamming ecc,In the doc,it says that the it is the soft driver's responsibility to check the error.So,if we need hamming ecc,we need to choose the sw hamming ecc?

But in the uboot code,it seems that sw ecc is no some extra code present.

Thanks in advance for any reply.