I would not exactly call what we have for powerpc "exporting the OFW device tree". I don't quite know what it is, but it isn't as simple as exporting the OFW device tree. I don't think we really wanted to get into any of that here.
The Linux PowerPC port uses an OF-like device tree on *every* platform, even those that don't have a native OF. It also has to work around lots of bugs in many OF implementations. It's doing lots of stuff, and not all of it is nicely separated into logical modules I'm afraid.
Sure they can take advantage of it, if what they need to export is a read-only copy of the actual device tree without any legacy burden or having a writable/changeable copy of it with a trivial implementation.
So give them an interface that allows them to hook up to your new code :-)
This is a trivial implementation that suits it's purpose. It's simple. I'm not sure what more is needed for this project when it's pretty clear that i386 will never need any additional support for open firmware.
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