On 12 March 2015 at 16:45, Pi-Cheng Chen [off-list ref] wrote:

The voltages of the two regulators need to be always under a limitation:
100mV < Vsram - Vproc < 200mV
For now, I just calculate the OPPs of Vsram from OPPs of Vproc.

Another thing I should mention, if the voltage difference of two adjacent
OPPs is greater than 100mV, we need to set the regulator to some
voltages which are not in OPP table considering the limitation above.
I think that will make it more difficult to model such flow in a generic
framework.

Actually the problem is that OPP tables are insufficient for such cases,
and we are adding work-arounds to fix that. Though it will get fixed
with the new bindings we are adding.

I am confused on what we should be doing here. Even if you write
your own driver, you will be abusing DT with incorrect information.

Even if you go around adding a new driver, I would like you to fallback
to cpufreq-dt ones the new OPP bindings are in place.