On Thu, Nov 07, 2013 at 01:55:21AM +0000, Rongjun Ying wrote: > > For given board, what voltages could be provided is known. So you can > > just define OPP table in <board>.dts and specify the voltage as the > > value that the regulator IC can supply, e.g. 1.200V in above example. > > > > This is not nice, as OPP table is CPU/SoC specific and should be > > ideally defined in <soc>.dtsi. But still it's a way out for you to use > > cpufreq-cpu0 driver as it is. > > > > In any case, you can not just change voltage-tolerance to voltage-max > > with no care about the existing users. > > > > Shawn > > > I don't think so. The voltage/freq pairs are attribute of the CPU. > Any boards can choose regulator IC base the cost and other reasons. > If the opp table defined in <board>.dts, we can set exact voltage/freq pairs, > and not need use the voltage-tolerance to set tolerance. If you read my comment above, you should see that I agree OPP is CPU/SoC specific and should be defined in <soc>.dtsi. But property operating-points can reasonably be overwritten by particular <board>.dts for some reason like some voltages cannot be supplied on that board. Again, this is just a way for you to use generic cpufreq-cpu0 driver as it is, but not necessarily the best one. Shawn -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
