Actually I think their plan is to continue not competing by acquiring all competition, as is now the norm in the semiconductor business. They call it "consolidation" but lets not mistake it for what it is.
Yes - the list on https://wiki.analog.com/linux is a consolidated list:
- ADI devices (there is only one ADI, when a company is acquired, they are integrated - the group inside ADI that writes drivers doesn't care what the part prefix is)
- internal ADI development and upstreamed/mainlined drivers that have been done by our customers / other contributors
It was done this way to try to make it easier for people to find the drivers, rather than rolling through kernel source. The Majority of the drivers are upstream (including the ones ADI writes), or are in process of going upstream, but some drivers - because of their development flow - will never meet upstream kernel coding guidelines.