Dear Simon Glass,
In message CAPnjgZ1RoyguaAScOQiw8PoQkzVp5rim7KJ6zzHLNPwuBYK48Q@mail.gmail.com you wrote:
Perhaps reword this slightly. U-Boot can have knowledge of a current adaptor, mux settings and so on, and use this internally within the i2c layer to optimise performance and redundant i2c traffic. But the pain is when the concept of a 'current adaptor' is exposed outside the i2c layer.
As mentioned before, this is what we currently have as "device model" in U-Boot - not only I2C: we have the same "current device" concept with IDE, USB, ...
It makes no sense trying to change it here; it would only cause even more incompatibilities. If you want to fix that, then help working on the new driver model. Marek is planning for this.
Best regards,
Wolfgang Denk