SWUpdate RootFS and Device Tree - embedded-linux

Question

I am using Yocto to create a Linux build for an IMX6. This is going great and I am not looking into using SWUpdate to perform kernel and device tree updates. So far I have a bitbake script which does the following.
source setup-environment build-fb/
bitbake -c cleanall swupdate
bitbake swupdate
bitbake -c cleanall swupdate-image
bitbake swupdate-image
bitbake -c cleanall mainapplication-dev
bitbake mainapplication-dev
bitbake -c cleanall smg-image-swu
bitbake smg-image-swu
This properly configures my build and creates a .swu file containing three items
mainapplication-dev-imx6ull14x14evk.tar.bz2
sw-description
update.sh
I followed a guide by Variscite and referenced their GitHub. In their guide they mention that
This leads me to believe that after they run a build, the .swu file contains the files I listed above with the addition that in /boot lies a zimage and a .dtb file. I have replicated their bb files. In my mainapplication-dev-imx6ull14x14evk.tar.bz2 in the /boot directory, I only have a zimage. I cannot get this to package the device tree.
Has anyone done this before? Can anyone guide me here? For reference I am adding my bitbake files below.
smg-image-swu.bb:
DESCRIPTION = "Example compound image for Variscite boards"
SECTION = ""
# Note: sw-description is mandatory
SRC_URI = " \
file://sw-description \
file://update.sh \
"
inherit swupdate
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
# IMAGE_DEPENDS: list of Yocto images that contains a root filesystem
# it will be ensured they are built before creating swupdate image
IMAGE_DEPENDS = "mainapplication-dev"
# SWUPDATE_IMAGES: list of images that will be part of the compound image
# the list can have any binaries - images must be in the DEPLOY directory
SWUPDATE_IMAGES = "mainapplication-dev"
SWUPDATE_IMAGES_FSTYPES[mainapplication-dev] = ".tar.bz2"
smg-image-swupdate.bb
DESCRIPTION = ""
LICENSE = "MIT"
require recipes-core/images/core-image-minimal.bb
CORE_IMAGE_EXTRA_INSTALL += " \
swupdate \
swupdate-www \
kernel-image \
kernel-devicetree \
"
IMAGE_FSTYPES = "tar.gz"

Answer 1

To add the device tree and modules to my .swu image I made the following change to smg-image-swu.bb
DESCRIPTION = "Example compound image for Variscite boards"
SECTION = ""
# Note: sw-description is mandatory
SRC_URI = " \
file://sw-description \
file://update.sh \
"
inherit swupdate
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
# IMAGE_DEPENDS: list of Yocto images that contains a root filesystem
# it will be ensured they are built before creating swupdate image
IMAGE_DEPENDS = "mainapplication-dev virtual/kernel"
# SWUPDATE_IMAGES: list of images that will be part of the compound image
# the list can have any binaries - images must be in the DEPLOY directory
SWUPDATE_IMAGES = "mainapplication-dev \
modules-imx6ull14x14evk \
imx6ull-14x14-evk"
SWUPDATE_IMAGES_FSTYPES[mainapplication-dev] = ".tar.bz2"
SWUPDATE_IMAGES_FSTYPES[modules-imx6ull14x14evk] = ".tgz"
SWUPDATE_IMAGES_FSTYPES[imx6ull-14x14-evk] = ".dtb"