> > +	i2c6: i2c@e60b0000 {
> > +		/* doesn't need pinmux */
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +		compatible = "renesas,i2cB-r8a7791", "renesas,rmobile-iic";
> 
> Wouldn't "renesas,iic-r8a7791" be more appropriate ? It would be closer to 
> "renesas,rmobile-iic".

Yes, that is better probably. Still a bit confusing, yet better.