Saquib wrote:
> *In case of using YAFFS2 direct interface, do we need MTD interface or 
> similar layer like MTD? *

You need to provide a certain set of functions in your 
yaffs_DeviceParamStruct to access your NAND chip. I suggest you take a 
look at yaffs_mtdif2.c, which is a set of such functions which use the 
Linux MTD layer. If rolling your own from scratch, you will need to 
think about exactly where in the spare (OOB) area of each page the YAFFS 
tags will live, and whether your driver should compute and check ECC on 
the page data.


Ross

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