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cpufreq: trace frequency limits change

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systrace used for tracing for Android systems has carried a patch for
many years in the Android tree that traces when the cpufreq limits
change.  With the help of this information, systrace can know when the
policy limits change and can visually display the data. Lets add
upstream support for the same.

Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ruchi Kandoi
2018-07-24 10:35:44 -07:00
committed by Rafael J. Wysocki
parent 6e926363fc
commit 601b218568
3 changed files with 27 additions and 0 deletions
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drivers/cpufreq/cpufreq.c
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@@ -2236,6 +2236,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
policy->min = new_policy->min;
policy->max = new_policy->max;
trace_cpu_frequency_limits(policy);
policy->cached_target_freq = UINT_MAX;