Applying Device Tree Overlays

The meta-demmelproducts layer provides the the bitbake recipe recipes-bsp/dp-u-boot-config-tool/dp-u-boot-config-tool_0.1.bb, which allows to load device tree overlays during boot-up. It installs the config.txt file to the boot partition of the SD-Card (/run/media/boot-mmcblk1p1) and the internal eMMC storage (/run/media/boot-mmcblk2p1). The file specifies, which device tree overlays are loaded.

Config File Content

# Uncomment and set the variable fdt_overlay as desired. 
# Multiple device tree overlays, separated by space, can be set.
fdt_overlay=<overlay1.dtbo> [<overlay2.dtbo>] ...
# e.g. fdt_overlay=dp-dpp-lxx-8p-micfil-overlay.dtbo