dev->nBytesPerChunk = mtd->oobblock;
dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
nBlocks = mtd->size / mtd->erasesize;
dev->nBytesPerChunk = mtd->oobblock;
dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
nBlocks = mtd->size / mtd->erasesize;