On Tue, Jan 21, 2020 at 07:00:22PM +0200, Mika Westerberg wrote:

> OK, thanks for the clarification. I guess in this case we can probably
> just live without using it, if that's fine for Lee and others. The new
> MFD driver itself is ~500 lines so not sure how much regmap would help
> there, and we only expose two simple functions for the subdevices both
> dealing with 64-bit registers.

The usual motivation is all the diagnostic infrastructure you get with
regmap - tracepoints for I/O and the ability to dump the register map in
debugfs mainly.