> Perhaps someone need to explain in more detail what the HW controller
> needs to manage tuning for HS400? I don't like that we may end up
> getting it magically to work, then it's we better understand the
> details and if the current sequence provided by the mmc core can't
> fulfill the need for this case, we may instead consider adding an
> additional pre/post host ops.

Thanks. Exactly this thinking prevented me from saying "It works, let's
ship it" ;)