cpufreq: Use transition_delay_us for legacy governors as well
The policy->transition_delay_us field is used only by the schedutil
governor currently, and this field describes how fast the driver wants
the cpufreq governor to change CPUs frequency. It should rather be a
common thing across all governors, as it doesn't have any schedutil
dependency here.
Create a new helper cpufreq_policy_transition_delay_us() to get the
transition delay across all governors.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 9bf97a3..c426d21 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -524,6 +524,21 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
+unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy)
+{
+ unsigned int latency;
+
+ if (policy->transition_delay_us)
+ return policy->transition_delay_us;
+
+ latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
+ if (latency)
+ return latency * LATENCY_MULTIPLIER;
+
+ return LATENCY_MULTIPLIER;
+}
+EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us);
+
/*********************************************************************
* SYSFS INTERFACE *
*********************************************************************/