> >> @Bart: is it possible to share a GPIO so that multiple i2c-gpio
> >> instances can use the same GPIO as SCL? Use case is explained in the
> >> cover letter[2].
> >
> 
> The way it works is with a kind of a voting system. As long as there's at
> least one user that votes for the GPIO to be "high", it stays high. Is this
> behavior fine for the recovery use-case?

Ouch, I guess this will not work then. SCL is high in its idle state.
So, all busses except the active one will request high :(

I guess Markus would need some kind of locking for the shared SCL-GPIO
anyhow. Like bus Y has to wait until bus X has finished SCL toggling for
its transfer. That's how I understand it.