Uboot Nand Cmd

U_BOOT_CMD(nand, 5, 1, do_nand,       "nand    - NAND sub-system\n",       "info - show available NAND devices\n"       "nand device [dev] - show or set current device\n"       "nand read - addr off|partition size\n"       "nand write - addr off|partition size\n"       "    read/write 'size' bytes starting at offset 'off'\n"       "    to/from memory address 'addr', skipping bad blocks.\n"       "nand erase [clean] [off size] - erase 'size' bytes from\n"       "    offset 'off' (entire device if not specified)\n"       "nand bad - show bad blocks\n"       "nand dump[.oob] off - dump page\n"       "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"       "nand markbad off - mark bad block at offset (UNSAFE)\n"       "nand biterr off - make a bit error at offset (UNSAFE)\n"       "nand lock [tight] [status]\n"       "    bring nand to lock state or display locked pages\n"       "nand unlock [offset] [size] - unlock section\n");