[U-Boot] fatls/fatload for NAND (partition)

Has anyone tried/incorporated the use of the FAT tools to access NAND storage? I know one can use fatls on usb and mmc (which are "boot" devices), but it seems natural that one should be able to use the FAT tools on NAND as well, perhaps through some pseudo-device (that maps to some NAND partition(s)). This would allow Linux to set up some mtd partition(s) as vfat and U-boot to get to the same partition(s) as well.

Thanks for any input.

PL