linux-kernel - [PATCH 8/8] cpufreq: vexpress: Use auto-registration for energy model

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Message-Id: <87fecd84e3f6ff6f153be14b0d53de93c0b04ae6.1628579170.git.viresh.kumar@linaro.org>
Date:   Tue, 10 Aug 2021 13:06:55 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Rafael Wysocki <rjw@...ysocki.net>,
        Vincent Donnefort <vincent.donnefort@....com>,
        lukasz.luba@....com, Viresh Kumar <viresh.kumar@...aro.org>,
        Sudeep Holla <sudeep.holla@....com>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 8/8] cpufreq: vexpress: Use auto-registration for energy model

Use the CPUFREQ_REGISTER_WITH_EM flag to allow cpufreq core to
automatically register with the energy model.

This allows removal of boiler plate code from the driver and fixes the
unregistration part as well.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/cpufreq/vexpress-spc-cpufreq.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/vexpress-spc-cpufreq.c b/drivers/cpufreq/vexpress-spc-cpufreq.c
index 51dfa9ae6cf5..28c4c3254337 100644
--- a/drivers/cpufreq/vexpress-spc-cpufreq.c
+++ b/drivers/cpufreq/vexpress-spc-cpufreq.c
@@ -442,8 +442,6 @@ static int ve_spc_cpufreq_init(struct cpufreq_policy *policy)
 	policy->freq_table = freq_table[cur_cluster];
 	policy->cpuinfo.transition_latency = 1000000; /* 1 ms */
 
-	dev_pm_opp_of_register_em(cpu_dev, policy->cpus);
-
 	if (is_bL_switching_enabled())
 		per_cpu(cpu_last_req_freq, policy->cpu) =
 						clk_get_cpu_rate(policy->cpu);
@@ -487,7 +485,8 @@ static void ve_spc_cpufreq_ready(struct cpufreq_policy *policy)
 static struct cpufreq_driver ve_spc_cpufreq_driver = {
 	.name			= "vexpress-spc",
 	.flags			= CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
-					CPUFREQ_NEED_INITIAL_FREQ_CHECK,
+				  CPUFREQ_NEED_INITIAL_FREQ_CHECK |
+				  CPUFREQ_REGISTER_WITH_EM,
 	.verify			= cpufreq_generic_frequency_table_verify,
 	.target_index		= ve_spc_cpufreq_set_target,
 	.get			= ve_spc_cpufreq_get_rate,
-- 
2.31.1.272.g89b43f80a514