From mboxrd@z Thu Jan 1 00:00:00 1970 From: Quentin Perret Subject: [PATCH 4/7] cpufreq: arm_big_little: Register an Energy Model Date: Mon, 28 Jan 2019 16:55:19 +0000 Message-ID: <20190128165522.31749-5-quentin.perret@arm.com> References: <20190128165522.31749-1-quentin.perret@arm.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190128165522.31749-1-quentin.perret@arm.com> Sender: linux-kernel-owner@vger.kernel.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: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dietmar.eggemann@arm.com, mka@chromium.org, quentin.perret@arm.com List-Id: devicetree@vger.kernel.org From: Dietmar Eggemann 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 Signed-off-by: Quentin Perret --- drivers/cpufreq/arm_big_little.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c index cf62a1f64dd7..803d41c629c3 100644 --- a/drivers/cpufreq/arm_big_little.c +++ b/drivers/cpufreq/arm_big_little.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -456,6 +457,7 @@ static int get_cluster_clk_and_freq_table(struct device *cpu_dev, /* Per-CPU initialization */ static int bL_cpufreq_init(struct cpufreq_policy *policy) { + struct em_data_callback em_cb = EM_DATA_CB(of_dev_pm_opp_get_cpu_power); u32 cur_cluster = cpu_to_cluster(policy->cpu); struct device *cpu_dev; int ret; @@ -487,6 +489,14 @@ 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; + } + + em_register_perf_domain(policy->cpus, ret, &em_cb); + if (is_bL_switching_enabled()) per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu); -- 2.20.1