linux-kernel - [PATCH v4 3/5] cpufreq: scpi: Register an Energy Model

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Date:   Mon,  4 Feb 2019 11:09:50 +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 3/5] cpufreq: scpi: 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 scpi-cpufreq, 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/scpi-cpufreq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index 99449738faa4..b279f94d82f7 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c
@@ -170,6 +170,9 @@ static int scpi_cpufreq_init(struct cpufreq_policy *policy)
 	policy->cpuinfo.transition_latency = latency;
 
 	policy->fast_switch_possible = false;
+
+	dev_pm_opp_of_register_em(policy->cpus);
+
 	return 0;
 
 out_free_cpufreq_table:
-- 
2.20.1