PM / devfreq: Add devm_devfreq_{register,unregister}_opp_notfier function

This patch add resource-managed function for devfreq opp as following
functions. The devm_devfreq_register_opp_notifier() manages automatically
the registration of devfreq opp using device resource management.
- devm_devfreq_register_opp_notifier
- devm_devfreq_unregister_opp_notifier()

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index 023d668a2cb5..f1863dcd83ea 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -199,6 +199,10 @@ extern int devfreq_register_opp_notifier(struct device *dev,
                                          struct devfreq *devfreq);
 extern int devfreq_unregister_opp_notifier(struct device *dev,
                                            struct devfreq *devfreq);
+extern int devm_devfreq_register_opp_notifier(struct device *dev,
+                                              struct devfreq *devfreq);
+extern void devm_devfreq_unregister_opp_notifier(struct device *dev,
+                                                struct devfreq *devfreq);
 
 #if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
 /**
@@ -275,6 +279,16 @@ static inline int devfreq_unregister_opp_notifier(struct device *dev,
         return -EINVAL;
 }
 
+static inline int devm_devfreq_register_opp_notifier(struct device *dev,
+                                                     struct devfreq *devfreq)
+{
+        return -EINVAL;
+}
+
+static inline void devm_devfreq_unregister_opp_notifier(struct device *dev,
+                                                        struct devfreq *devfreq)
+{
+}
 #endif /* CONFIG_PM_DEVFREQ */
 
 #endif /* __LINUX_DEVFREQ_H__ */