quoted

Is this clock solely about card detection? So in cases when you have a
GPIO card detect, the clock isn't needed?

Just trying to understand things a bit better...

According to the hardware manual, enabling the "core" clock but not the
"cd" clock is not a valid setting. So in our case, it's always all or
nothing.

It was my suggestion to either handle both clocks as "virtually" one
clock so it simulates how other SDHI instances behave, or to implement
proper and intended handling of the cd clock to save some power. Chris
chose the first option and I have full understanding for that decision.