Hi Cheng,
Booting from NAND is supported.
It was easy to install UBOOT using UBOOT from SD version with provided env scripts...
update_nand_full......
Otherwise I didn´t manage to partition and flash uImage/rootfs from UBOOT using UBIFS.
Got errors on partitioning.
Could do that afterwards from booted linux using ng_tools(??), anyway - there are lots of descriptions for that job on the net.
If you want to run the uImage from tlib distribution - you will observe a crash because the frequency scaling wants to modify the pll on startup..., there is a patch for this issue - see my threads on imxcommunity.
Should be no problem with "normal" kernel.
I ended up with a system running from nand - but got spurious errors on the filesystem.(same as other users reporting)
Somehow I think this will be fixed within few weeks (UBOOT-UBIFS)... so I wouldn´t invest too much time - just have a running linux at first sight - and try again with newer releases as times go by.
I would try to stick with denx/m28/yocto releases/toolchain.
For my uboot, I used denx/m28 as basis - and copied the hardware init from imx28evk to the board specific files.
rgds. and good luck !
Wolfgang
