This tool generates a device tree source file from a mainline-flavoured install_dtbs output.
The source file can either be compiled as-is or be included from a .dts file with additional manually-authored mappings.
The compiled mapping.dtb can be used with fdtshim to properly map between ambiant data and the correct .dtb file.
See the fdtshim project for more information.
$ fdtshim-mapping-generator path/to/dtbs > output.dtsi