Hi Geert,

> In addition, Wolfram tried transmitting something on R-Car H2 from
> the U-Boot prompt, and noticed the ICINT.ADTE bit is set afterwards,
> indicating success.

Note that I tested this basic test on E2 as well.

> As the Linux (or other OS?) i2c driver doesn't use automatic
> transmission, and it's very unlikely it ever will (anyone with a
> use case?), I'm inclined to simplify, and declare all IIC instances
> compatible with the generic version.
> If we ever want to implement support for automatic transmission,
> we can still differentiate by the SoC-specific compatible values,
> as they are present anyway, and may have to resort to checking
> e.g. instance base addresses anyway.
> 
> Thoughts? Thanks!

I agree. So, if nobody speaks up in the next days, I will apply this
patch as is.

Thanks for your investigating!

   Wolfram