There are two parts for device to be ready to talk at bus level:
1> power up and reset,
2> enumerate and assign a logical address by the slimbus controller.
First part as you said is already done in probe.
When second part happens when status callback is invoked, that is when the
slimdevice is ready for any kind of communication at bus level.
I see. I still think it's hacky to conduct start-up procedures when
all the SS requested was status. Perhaps it needs a new API call
init()?