are controlled by DT/ACPI. The same argument applies for not using MFD
in this scenario as it relies on individual function devices being
physical devices that are DT enumerated.
MFD has no reliance on devices being DT enumerated, it works on systems
that don't have DT and in many cases it's not clear that the split you'd
want for the way Linux describes devices is a sensible one for other
operating systems so we don't want to put it into DT. Forcing things to
be DT enumerated would just create needless ABIs.
I agree the "DT enumerated" part should be removed.
To the best of my knowledge, the part of 'individual function devices
being physical devices' is correct though. MFDs typically expose
different functions on a single physical bus, and the functions are
separated out by register maps. In the case where there's no physical
bus/device and no register map it's unclear how MFDs would help?
