There is a lot of data and information on supported devices that is scattered around the Repicant wiki, git repositories and even Wikidata. So it's a good idea to have a checklist on what to add.
When we will have migrated to Mediawiki, we could automatically generate part of that list as we will be able to tag pages with Cathegories.
In addition if you can send a patch for the data repository to add the PIT if your device has a PIT. Additionally you can just push the commit if you have push access.
Additionally some projects