On Tue, Dec 10, 2019 at 11:14:48AM +0000, Vaittinen, Matti wrote:

> Problem is that if no default voltages are given from DT, the the first
> voltage changes are likely to be slow (require register access - I
> guess the HW defaults are not working for many use-cases) - which may
> be undesirable.

I don't think that's likely to be a practical problem, and it's not
likely it'd be worse than always doing writes.  A lot of things are
slower the first time you do them and you're still going to have to
do the writes no matter what.