The newer NAND system seems to do a bad block search on startup. This takes several seconds when the NAND is big, like 256Mbytes. How about an #ifndef around this search, like CFG_NAND_NO_BAD_BLOCK_SEARCH so it can be turned off?

I can confirm the newer NAND system works with a 16 bit Micron NAND flash right out of the box once I've implemented the glue routines specific to my board. Good job!

Before I knew about the newer git version and was modifying 1.1.4 I had modified u-boot to support the micron NAND, but that work is irrelevant now. Maybe u-boot is ready for a major new release 1.1.5???

-Dave