cmd_nand.c

			if (argc > 3)
				goto usage;
			if (argc == 3)
				addr = simple_strtoul(argv[1], NULL, 16);
			else
				addr = CONFIG_SYS_LOAD_ADDR;
			return nand_load_image(cmdtp, &nand_info[dev->id->num],
					       part->offset, addr, argv[0]);
		}
	}
#endif

	bootstage_mark(BOOTSTAGE_ID_NAND_PART);
	switch (argc) {
	case 1:
		addr = CONFIG_SYS_LOAD_ADDR;
		boot_device = getenv("bootdevice");
		break;
	case 2:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = getenv("bootdevice");
		break;
	case 3:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = argv[2];
		break;
	case 4:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = argv[2];
		offset = simple_strtoul(argv[3], NULL, 16);
		break;
	default:
#if defined(CONFIG_CMD_MTDPARTS)
usage:
#endif
		bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
		return CMD_RET_USAGE;
	}
	bootstage_mark(BOOTSTAGE_ID_NAND_SUFFIX);

	if (!boot_device) {
		puts("\n** No boot device **\n");
		bootstage_error(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
		return 1;
	}
	bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);

	idx = simple_strtoul(boot_device, NULL, 16);

	if (idx < 0 || idx >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[idx].name) {
		printf("\n** Device %d not available\n", idx);
		bootstage_error(BOOTSTAGE_ID_NAND_AVAILABLE);
		return 1;
	}
	bootstage_mark(BOOTSTAGE_ID_NAND_AVAILABLE);

	return nand_load_image(cmdtp, &nand_info[idx], offset, addr, argv[0]);
}

U_BOOT_CMD(nboot, 4, 1, do_nandboot,
	"boot from NAND device",
	"[partition] | [[[loadAddr] dev] offset]"
);