[U-Boot] write to mcBsp address space

Hello,

I'm working on OMAPL138 EVM board, with the U-BOOT. I'm trying to access and write into the register (which have write bits), but I always read 0 in all the map space of the mcBSP0 and mcBSP1. (0x01d10000 - 0x1d10800, 0x01d11000 - 0x1d11800). I wonder what I missed here. any ideas are welcomed.

Thank you very much,

Ran