Add I2C bus scan routine for octiic(4)

Unfortunately, machines tend to come with underpopulated device trees,
and consequently this change is not very useful as is. The lack of good
data is troubles

Add I2C bus scan routine for octiic(4)

Unfortunately, machines tend to come with underpopulated device trees,
and consequently this change is not very useful as is. The lack of good
data is troublesome especially with things like I2C bus switches.

show more ...

Register octiic(4) with the I2C framework

This generally is an exercise in futility because the phandle of the
controller node tends to be missing.

Add a driver for OCTEON two-wire serial interface.

Not enabled yet because of a conflict with octrtc(4).