[PATCH 3/7] cpufreq: scpi: Register an Energy Model
From: Quentin Perret <hidden>
Date: 2019-01-28 16:55:45
Also in:
linux-devicetree, linux-pm, lkml
Subsystem:
cpu frequency scaling framework, system control & power/management interface (scpi/scmi) message protocol drivers, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Sudeep Holla, Linus Torvalds
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 <redacted> --- drivers/cpufreq/scpi-cpufreq.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index 87a98ec77773..05fc7448f5cb 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c@@ -23,6 +23,7 @@ #include <linux/cpufreq.h> #include <linux/cpumask.h> #include <linux/cpu_cooling.h> +#include <linux/energy_model.h> #include <linux/export.h> #include <linux/module.h> #include <linux/of_platform.h>
@@ -98,11 +99,12 @@ scpi_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask) static int scpi_cpufreq_init(struct cpufreq_policy *policy) { - int ret; + int ret, nr_opp; unsigned int latency; struct device *cpu_dev; struct scpi_data *priv; struct cpufreq_frequency_table *freq_table; + struct em_data_callback em_cb = EM_DATA_CB(of_dev_pm_opp_get_cpu_power); cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) {
@@ -135,6 +137,7 @@ static int scpi_cpufreq_init(struct cpufreq_policy *policy) ret = -EPROBE_DEFER; goto out_free_opp; } + nr_opp = ret; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) {
@@ -170,6 +173,9 @@ static int scpi_cpufreq_init(struct cpufreq_policy *policy) policy->cpuinfo.transition_latency = latency; policy->fast_switch_possible = false; + + em_register_perf_domain(policy->cpus, nr_opp, &em_cb); + return 0; out_free_cpufreq_table:
--
2.20.1
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