Now, We have a custom ls1021a board which has a nand flash, and we need to boot from nand flash. The uboot,linux kernel,rootfs place on this nand flash. After uboot running, it must load kernel and rootfs from nand. so I think that we must enable "NAND CMD" and "MTD" driver when we compile the uboot.
I see the ls1021aqds_nand_defconfig file which not enable the up options. I confuse that. if not enable, how does uboot read kernel and rootfs?