On 26 February 2014 13:15, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote: > On 26 February 2014 03:59, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote: >> Yes, what exactly do we need it for in the core? > > Its probably there to make things faster. We cache the value so that we > don't go to the hardware to read/calculate that again. Isn't it? > > And we need to know current freq on many occasions. One of that is that > many drivers need to know the relation between current and new freq before > they can make the change. As they might need to play with volt regulators > before or after the freq change. Also it is used mainly in our loops_per_jiffiy > calculations. Ping!! -- 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
