I wanted to know if there was a document detailing a standard strategy to upgrading uboot in the field using the second boot partition.
We are using eMMC and kernel uboot U-Boot 2014.04. Our kernel is based on version 3.14.28
Obviously we want to use the unused partition to upgrade and then only permanently switch to it once it is known to be good. This will stop bricking in the field. (Most devices have an network interface but not USB (or a way to force serial boot mode).