linux-kernel - [RFC v3 2/5] cpufreq:LAB:cpufreq_governor Adjust cpufreq

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Date:	Tue, 04 Mar 2014 11:27:29 +0100
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Thomas Abraham <ta.omasab@...il.com>, thomas.ab@...sung.com,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-samsung-soc@...r.kernel.org
Subject: [RFC v3 2/5] cpufreq:LAB:cpufreq_governor Adjust
 cpufreq_governor.[h|c] to support LAB

Some minor adjustments were needed to support LAB operation in the
cpufreq_governor.[h|c] files.

Most notably, code for proper estimation of the idle time for each CPU is
added here.

Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>
---
 drivers/cpufreq/cpufreq_governor.c |    7 +++++++
 drivers/cpufreq/cpufreq_governor.h |    2 ++
 2 files changed, 9 insertions(+)

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index ba43991..99fc3e8 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -98,6 +98,13 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
 
 		load = 100 * (wall_time - idle_time) / wall_time;
 
+		if (dbs_data->cdata->governor == GOV_LAB) {
+			struct od_cpu_dbs_info_s *od_dbs_info =
+				dbs_data->cdata->get_cpu_dbs_info_s(j);
+
+			od_dbs_info->idle_time = (100 * idle_time) / wall_time;
+		}
+
 		if (load > max_load)
 			max_load = load;
 	}
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index 34b1cf2..82a519f 100644
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -152,6 +152,7 @@ struct od_cpu_dbs_info_s {
 	unsigned int freq_lo_jiffies;
 	unsigned int freq_hi_jiffies;
 	unsigned int rate_mult;
+	unsigned int idle_time;
 	unsigned int sample_type:1;
 };
 
@@ -187,6 +188,7 @@ struct common_dbs_data {
 	/* Common across governors */
 	#define GOV_ONDEMAND		0
 	#define GOV_CONSERVATIVE	1
+	#define GOV_LAB                 2
 	int governor;
 	struct attribute_group *attr_group_gov_sys; /* one governor - system */
 	struct attribute_group *attr_group_gov_pol; /* one governor - policy */
-- 
1.7.10.4

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