[U-Boot-Users] Query regarding u-boot source code across versions

[Pharaoh .]

Hi,

I am comparing u-boot 1.1.1 and 1.2.0, especially I am checking the
omap 730 p2 sample specific code. U-boot 1.1.0 has NAND support but
u-boot 1.2.0 doesnt seem to have (atleast from the source code it
seems !). u-boot 1.1.1 works as it is for my p2-sample board but
u-boot 1.2.0 doesnt work as it is. After some modifications to u-boot
1.2.0 it is working on the same board (I didnt modify the u-boot code
related to NAND since I am not booting off NAND, just an observation).
My question is, how come the later version of u-boot is not working
with the same board which it supports? I know there might be some
patches etc but, can I think of it as u-boot 1.2.0 doesn't work for
the same board for which old u-boot 1.1.1 used to work without
tweaking it a little? Do this kind of things happen or I might be
making a mistake?

Pharaoh.