linux-kernel - [PATCH v4 2/5] cpufreq: dt: Register an Energy Model

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Message-Id: <20190204110952.16025-3-quentin.perret@arm.com>
Date:   Mon,  4 Feb 2019 11:09:49 +0000
From:   Quentin Perret <quentin.perret@....com>
To:     viresh.kumar@...aro.org, sudeep.holla@....com, rjw@...ysocki.net,
        nm@...com, sboyd@...nel.org, mka@...omium.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, dietmar.eggemann@....com,
        quentin.perret@....com
Subject: [PATCH v4 2/5] cpufreq: dt: 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 cpufreq-dt, hence ensuring interested subsystems (the task
scheduler, for example) can make use of that information when available.

Signed-off-by: Quentin Perret <quentin.perret@....com>
---
 drivers/cpufreq/cpufreq-dt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index e58bfcb1169e..d74e0402512a 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -280,6 +280,8 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 	policy->cpuinfo.transition_latency = transition_latency;
 	policy->dvfs_possible_from_any_cpu = true;
 
+	dev_pm_opp_of_register_em(policy->cpus);
+
 	return 0;
 
 out_free_cpufreq_table:
-- 
2.20.1