On 26 February 2014 13:15, Viresh Kumar <[email protected]> wrote: > On 26 February 2014 03:59, Rafael J. Wysocki <[email protected]> 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.
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