[PATCH v3 2/5] cpufreq: dt: Register an Energy Model
From: Quentin Perret <hidden>
Date: 2019-02-01 09:31:42
Also in:
linux-pm, lkml
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, 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 cpufreq-dt, 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/cpufreq-dt.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index e58bfcb1169e..1d4ad6f67408 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c@@ -160,7 +160,7 @@ 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) {
@@ -231,8 +231,8 @@ static int cpufreq_init(struct cpufreq_policy *policy) * But we need OPP table to function so if it is not there let's * give platform code chance to provide it for us. */ - ret = dev_pm_opp_get_opp_count(cpu_dev); - if (ret <= 0) { + nr_opp = dev_pm_opp_get_opp_count(cpu_dev); + if (nr_opp <= 0) { dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n"); ret = -EPROBE_DEFER; goto out_free_opp;
@@ -280,6 +280,8 @@ static int cpufreq_init(struct cpufreq_policy *policy) policy->cpuinfo.transition_latency = transition_latency; policy->dvfs_possible_from_any_cpu = true; + dev_pm_opp_of_register_em(policy->cpus, nr_opp); + return 0; out_free_cpufreq_table:
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel