From: Quentin Perret <quentin.perret@arm.com>
To: viresh.kumar@linaro.org, sudeep.holla@arm.com, rjw@rjwysocki.net,
nm@ti.com, sboyd@kernel.org, mka@chromium.org
Cc: quentin.perret@arm.com, dietmar.eggemann@arm.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org
Subject: [PATCH v3 4/5] cpufreq: arm_big_little: Register an Energy Model
Date: Fri, 1 Feb 2019 09:31:00 +0000 [thread overview]
Message-ID: <20190201093101.31869-5-quentin.perret@arm.com> (raw)
In-Reply-To: <20190201093101.31869-1-quentin.perret@arm.com>
From: Dietmar Eggemann <dietmar.eggemann@arm.com>
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>
---
drivers/cpufreq/arm_big_little.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index cf62a1f64dd7..18b05bcb2614 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -487,6 +487,14 @@ static int bL_cpufreq_init(struct cpufreq_policy *policy)
policy->cpuinfo.transition_latency =
arm_bL_ops->get_transition_latency(cpu_dev);
+ ret = dev_pm_opp_get_opp_count(cpu_dev);
+ if (ret <= 0) {
+ dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
+ return -EPROBE_DEFER;
+ }
+
+ dev_pm_opp_of_register_em(policy->cpus, ret);
+
if (is_bL_switching_enabled())
per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu);
--
2.20.1
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next prev parent reply other threads:[~2019-02-01 9:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-01 9:30 [PATCH v3 0/5] Register an Energy Model for Arm reference platforms Quentin Perret
2019-02-01 9:30 ` [PATCH v3 1/5] PM / OPP: Introduce a power estimation helper Quentin Perret
2019-02-01 12:04 ` Sudeep Holla
2019-02-01 12:09 ` Quentin Perret
2019-02-01 12:27 ` Sudeep Holla
2019-02-01 12:44 ` Sudeep Holla
2019-02-01 18:16 ` Matthias Kaehlcke
2019-02-01 9:30 ` [PATCH v3 2/5] cpufreq: dt: Register an Energy Model Quentin Perret
2019-02-01 9:30 ` [PATCH v3 3/5] cpufreq: scpi: " Quentin Perret
2019-02-01 9:31 ` Quentin Perret [this message]
2019-02-01 11:53 ` [PATCH v3 4/5] cpufreq: arm_big_little: " Sudeep Holla
2019-02-01 12:11 ` Quentin Perret
2019-02-01 9:31 ` [PATCH v3 5/5] cpufreq: scmi: " Quentin Perret
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