Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 354f0b0c authored by Dietmar Eggemann's avatar Dietmar Eggemann Committed by Quentin Perret
Browse files

ANDROID: cpufreq: arm_big_little: Register an Energy Model 



The Energy Model framework provides an API to register the active power
of CPUs. This commit calls this API from the scpi-cpufreq driver which
uses the power estimation helper from PM_OPP.

Todo: Check if driver can handle -EPROBE_DEFER and if the call to
dev_pm_opp_get_opp_count() id realy necessary.

Change-Id: Ia808262ef6c9f2cc7819a83e8eb2f602454edfa3
Signed-off-by: default avatarDietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: default avatarQuentin Perret <quentin.perret@arm.com>
parent 61dcd890

drivers/cpufreq/arm_big_little.c

+10 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#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/mutex.h>
@@ -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);