Apologies for resurrecting an old thread, but, I've made some progress on getting my RPi to boot with an iscsi target for the root file system and a WiFi link as the network connection. I suspect this method could be modified to use an NFS root file system too. Using the ip= kernel command line opti...

After spending too much time with Google and randomly browsing kernel code it looks like you can change the gpio pin. But. It can only be done at boot time with a /boot/cmdline.txt entry. Reading https://github.com/raspberrypi/linux/pull/457 it looks like if you add the following to /boot/cmdline.tx...