> > On top of that I'm wondering why slow I/O is used? Do we have anything
> > that really needs that or is it simply a cargo-cult?
> 
> The efch SMBUS & WDT previously only supported a port I/O interface 
> (until recently) and thus dictated the HW access method.  

Is this enough information to start v2 of this series? Or does the
approach need more discussion?