====== Update U-Boot ======
To update U-Boot with U-Boot via TFTP the file u-boot.bin has to be copied to the TFTP directory.
<code bash>
user@ubuntu:/.../src/u-boot$ sudo cp u-boot.bin /tftpboot/
</code>

The following command has to be executed in the target in U-Boot:
<code>
MX35 U-Boot > run prg_uboot
</code>
After replacing the old U-Boot the board must be reset. Therefore simply execute the command ''reset''.
<code>
MX35 U-Boot > reset
</code>

===== Source =====
  * http://www.denx.de/wiki/view/DULG/UBootInstallUsingUBoot