On Fri, Jun 7, 2019 at 6:32 AM Arend Van Spriel
Right. I know it supports initial tuning, but I'm not sure about subsequent
retuning initiated by the host controller.
My evidence says that it supports subsequent tuning. In fact, without
this series my logs would be filled with:
dwmmc_rockchip ff0d0000.dwmmc: Successfully tuned phase to XYZ
...where the phase varied by a few degrees each time. AKA: it was
retuning over and over again and getting sane results which implies
that the tuning was working just fine.