onenand_do_lock_cmd
ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);