From: Borislav Petkov <bp@suse.de>
Date: Sun, 20 Jan 2013 10:24:28 +0000 (+0000)
Subject: cpufreq: Add a get_current_driver helper
X-Git-Tag: upstream/snapshot3+hdmi~5650^2~2^2~46
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9d95046e5d6afd6d7ae86fb71ab59c6faf0db8de;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

cpufreq: Add a get_current_driver helper

Add a helper function to return cpufreq_driver->name.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2417576..216c104 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1395,6 +1395,20 @@ static struct syscore_ops cpufreq_syscore_ops = {
 	.resume		= cpufreq_bp_resume,
 };
 
+/**
+ *	cpufreq_get_current_driver - return current driver's name
+ *
+ *	Return the name string of the currently loaded cpufreq driver
+ *	or NULL, if none.
+ */
+const char *cpufreq_get_current_driver(void)
+{
+	if (cpufreq_driver)
+		return cpufreq_driver->name;
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(cpufreq_get_current_driver);
 
 /*********************************************************************
  *                     NOTIFIER LISTS INTERFACE                      *
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 52be2d0..1f3a726 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -411,4 +411,5 @@ void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
 void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
 
 void cpufreq_frequency_table_put_attr(unsigned int cpu);
+const char *cpufreq_get_current_driver(void);
 #endif /* _LINUX_CPUFREQ_H */