Since there is no central repository for fresh U-Boot binaries for the Zipit Z2, I decided to build my own u-boot.bin from source. Before I could do this, I needed to build a cross compiler for the arm processor. This is something I’ve always had trouble with on Debian systems but this time I used Gentoo and everything worked flawlessly. Luckily Marex left me with some very helpful hints on how to get the job done. First, you’ll need to set up a cross compiler if you have not already:
You’ll need to add the following lines to your /etc/make.conf:
Don’t forget to make the following directory since that is where your new tool chain is going to live:
Now it’s time to build your tool chain. This will take quite a bit of time.
time crossdev -S -t arm-linux-gnueabi
After all of that, you should be ready to build your u-boot.bin. First you need to grab the latest snapshot from http://git.denx.de/?p=u-boot/u-boot-pxa.git;a=shortlog;h=refs/heads/devel. Go ahead and unpack the file in your home directory:
tar -xvf u-boot-pxa-*
Next you need to run the following command. Double check and make certain that you have a space between the “…gnueabi-” and the “zipitz2…” parts.
make CROSS_COMPILE=arm-linux-gnueabi- zipitz2_config
Lastly, you can build the u-boot.bin firmware file with this command:
You should now have a working u-boot.bin file in the ./u-boot-pxa directory. With that file, you can follow these instructions to upgrade U-boot on your Zipit Z2. As usual, thanks to Marex for giving me the proper hints to make this happen.
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