This is the layout expected by the "distro boot" effort in U-Boot.
As far as I understand, the contract is:
- U-Boot built for `fooboard` by `vendor`, will set the `fdtfile`
variable to `vendor/fooboard.dtb` - or more precisely: matching
whatever path the dtb is built at in the kernel tree.
- A distro (e.g. Infix) then just needs to specify the `fdtdir` in its
syslinux config (/boot in our case), and U-Boot will be able to find
the correct dtb.
This let's us report the installed software versions, before any
updates have been made. Since the info should _not_ be erased in a
factory reset (since the installed software versions will not change),
move the status file to aux, which is the proper place for this class
of information.
/dev/ram is accepted by the kernel during boot, but there's no actual
file with this name in /dev, so RAUC will get confused about which
slot is actually one we booted from.
Add support for firmware updates via RAUC on aarch64. The created RAUC
bundle (images/infix-$BR2_ARCH.pkg) is signed with the same key used
to sign the raw FIT image.
Store FIT headers separately on aux, and place the raw SquashFS images
on primary/secondary. This removes the need to muck about with the
device mapper to setup the rootfs, and it allows us to boot using
syslinux files.
Tobias Waldekranz