PM / devfreq: Add resource-managed function for devfreq device

This patch add resource-managed function for devfreq device as following
functions. The devm_devfreq_add_device() manages automatically the memory
of devfreq device using device resource management.
- devm_devfreq_add_device()
- devm_devfreq_remove_device()

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

1 files changed, 20 insertions, 1 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index d48dc00232a4..023d668a2cb5 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -181,6 +181,12 @@ extern struct devfreq *devfreq_add_device(struct device *dev,
                                   const char *governor_name,
                                   void *data);
 extern int devfreq_remove_device(struct devfreq *devfreq);
+extern struct devfreq *devm_devfreq_add_device(struct device *dev,
+                                  struct devfreq_dev_profile *profile,
+                                  const char *governor_name,
+                                  void *data);
+extern void devm_devfreq_remove_device(struct device *dev,
+                                  struct devfreq *devfreq);
 
 /* Supposed to be called by PM_SLEEP/PM_RUNTIME callbacks */
 extern int devfreq_suspend_device(struct devfreq *devfreq);
@@ -220,7 +226,7 @@ static inline struct devfreq *devfreq_add_device(struct device *dev,
                                           const char *governor_name,
                                           void *data)
 {
-        return NULL;
+        return ERR_PTR(-ENOSYS);
 }
 
 static inline int devfreq_remove_device(struct devfreq *devfreq)
@@ -228,6 +234,19 @@ static inline int devfreq_remove_device(struct devfreq *devfreq)
         return 0;
 }
 
+static inline struct devfreq *devm_devfreq_add_device(struct device *dev,
+                                        struct devfreq_dev_profile *profile,
+                                        const char *governor_name,
+                                        void *data)
+{
+        return ERR_PTR(-ENOSYS);
+}
+
+static inline void devm_devfreq_remove_device(struct device *dev,
+                                        struct devfreq *devfreq)
+{
+}
+
 static inline int devfreq_suspend_device(struct devfreq *devfreq)
 {
         return 0;