cpufreq: arm_big_little: Register an Energy Model

Now that PM_OPP provides a helper function to estimate the power
consumed by CPUs, make sure to try and register an Energy Model (EM)
from the arm_big_little CPUFreq driver, hence ensuring interested
subsystems (the task scheduler, for example) can make use of that
information when available.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index cf62a1f..7fe52fc 100644 (file)
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -487,6 +487,8 @@ static int bL_cpufreq_init(struct cpufreq_policy *policy)
        policy->cpuinfo.transition_latency =
                                arm_bL_ops->get_transition_latency(cpu_dev);
 
+       dev_pm_opp_of_register_em(policy->cpus);
+
        if (is_bL_switching_enabled())
                per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu);