From mboxrd@z Thu Jan 1 00:00:00 1970 From: Quentin Perret Subject: [PATCH 2/7] cpufreq: dt: Register an Energy Model Date: Mon, 28 Jan 2019 16:55:17 +0000 Message-ID: <20190128165522.31749-3-quentin.perret@arm.com> References: <20190128165522.31749-1-quentin.perret@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190128165522.31749-1-quentin.perret@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: rjw@rjwysocki.net, viresh.kumar@linaro.org, sudeep.holla@arm.com, liviu.dudau@arm.com, lorenzo.pieralisi@arm.com, robh+dt@kernel.org, mark.rutland@arm.com, nm@ti.com, sboyd@kernel.org Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, quentin.perret@arm.com, mka@chromium.org, dietmar.eggemann@arm.com, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org 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 --- drivers/cpufreq/cpufreq-dt.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index e58bfcb1169e..7556e07e7a9f 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -152,6 +153,7 @@ static int resources_available(void) static int cpufreq_init(struct cpufreq_policy *policy) { + struct em_data_callback em_cb = EM_DATA_CB(of_dev_pm_opp_get_cpu_power); struct cpufreq_frequency_table *freq_table; struct opp_table *opp_table = NULL; struct private_data *priv; @@ -160,7 +162,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) unsigned int transition_latency; bool fallback = false; const char *name; - int ret; + int ret, nr_opp; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -237,6 +239,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) ret = -EPROBE_DEFER; goto out_free_opp; } + nr_opp = ret; if (fallback) { cpumask_setall(policy->cpus); @@ -280,6 +283,8 @@ static int cpufreq_init(struct cpufreq_policy *policy) policy->cpuinfo.transition_latency = transition_latency; policy->dvfs_possible_from_any_cpu = true; + em_register_perf_domain(policy->cpus, nr_opp, &em_cb); + return 0; out_free_cpufreq_table: -- 2.20.1