10 Mar
2014
10 Mar
'14
5:37 a.m.
On 26 February 2014 13:15, Viresh Kumar viresh.kumar@linaro.org wrote:
On 26 February 2014 03:59, Rafael J. Wysocki rjw@rjwysocki.net 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!!