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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-09-03 02:46:01 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-09-03 02:46:01 +0200
commit0ed537b5fd18c38b526fd0e6837a00f96aee30c4 (patch)
tree01744d89b09aaaaad77696265fb4732ef9a8fc32 /drivers/cpufreq/cpufreq.c
parent72e624de6e6f0d5a638fbc23842aa76ae048e9e7 (diff)
parent50a3cb04a5f9cd5323a76db9ee409a7f3004259a (diff)
Merge branch 'pm-opp' into pm-cpufreq
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c68
1 files changed, 48 insertions, 20 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index a05cc75cc45d..abb776827bb1 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2412,6 +2412,49 @@ int cpufreq_boost_supported(void)
}
EXPORT_SYMBOL_GPL(cpufreq_boost_supported);
+static int create_boost_sysfs_file(void)
+{
+ int ret;
+
+ if (!cpufreq_boost_supported())
+ return 0;
+
+ /*
+ * Check if driver provides function to enable boost -
+ * if not, use cpufreq_boost_set_sw as default
+ */
+ if (!cpufreq_driver->set_boost)
+ cpufreq_driver->set_boost = cpufreq_boost_set_sw;
+
+ ret = cpufreq_sysfs_create_file(&boost.attr);
+ if (ret)
+ pr_err("%s: cannot register global BOOST sysfs file\n",
+ __func__);
+
+ return ret;
+}
+
+static void remove_boost_sysfs_file(void)
+{
+ if (cpufreq_boost_supported())
+ cpufreq_sysfs_remove_file(&boost.attr);
+}
+
+int cpufreq_enable_boost_support(void)
+{
+ if (!cpufreq_driver)
+ return -EINVAL;
+
+ if (cpufreq_boost_supported())
+ return 0;
+
+ cpufreq_driver->boost_supported = true;
+
+ /* This will get removed on driver unregister */
+ return create_boost_sysfs_file();
+}
+EXPORT_SYMBOL_GPL(cpufreq_enable_boost_support);
+
int cpufreq_boost_enabled(void)
{
return cpufreq_driver->boost_enabled;
@@ -2465,21 +2508,9 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
if (driver_data->setpolicy)
driver_data->flags |= CPUFREQ_CONST_LOOPS;
- if (cpufreq_boost_supported()) {
- /*
- * Check if driver provides function to enable boost -
- * if not, use cpufreq_boost_set_sw as default
- */
- if (!cpufreq_driver->set_boost)
- cpufreq_driver->set_boost = cpufreq_boost_set_sw;
-
- ret = cpufreq_sysfs_create_file(&boost.attr);
- if (ret) {
- pr_err("%s: cannot register global BOOST sysfs file\n",
- __func__);
- goto err_null_driver;
- }
- }
+ ret = create_boost_sysfs_file();
+ if (ret)
+ goto err_null_driver;
ret = subsys_interface_register(&cpufreq_interface);
if (ret)
@@ -2503,8 +2534,7 @@ out:
err_if_unreg:
subsys_interface_unregister(&cpufreq_interface);
err_boost_unreg:
- if (cpufreq_boost_supported())
- cpufreq_sysfs_remove_file(&boost.attr);
+ remove_boost_sysfs_file();
err_null_driver:
write_lock_irqsave(&cpufreq_driver_lock, flags);
cpufreq_driver = NULL;
@@ -2533,9 +2563,7 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
/* Protect against concurrent cpu hotplug */
get_online_cpus();
subsys_interface_unregister(&cpufreq_interface);
- if (cpufreq_boost_supported())
- cpufreq_sysfs_remove_file(&boost.attr);
-
+ remove_boost_sysfs_file();
unregister_hotcpu_notifier(&cpufreq_cpu_notifier);
write_lock_irqsave(&cpufreq_driver_lock, flags);