Building & Flashing U-Boot for TX51
                             ===================================

Building U-Boot
---------------

Note: There are currently three variants of the TX51 module, that
      require slightly different U-Boot configurations. They are
      distinguished through the last digit of the module name. Replace
      the '?' in the following description with the corresponding
      number from your TX51 module.
      E.g. TX51-8021 => 'make tx51-80x1_config'

Unpacking the source
--------------------
mkdir u-boot
cd u-boot
tar -xjf /cdrom/U-Boot/u-boot-src.tar.bz2

Compiling U-Boot
----------------
export ARCH=arm
export CROSS_COMPILE=arm-cortexa8-linux-gnueabi-
make tx51-80x?_config            (see above Note!)
make


Flashing U-Boot Image
---------------------
If you want to replace a working U-Boot with a new version, you can
load the new U-Boot image via TFTP and program it like any other flash
partition with:
nand erase.part u-boot;nand write ${fileaddr} u-boot ${filesize}

If you want to revive a bricked module, you can use one of the
flashtools provided with the BSP to reprogram the flash.