PM / devfreq: Add devm_devfreq_add_governor()

Add resource-managed variant of devfreq_add_governor().

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 85faa7a..4579eef 100644 (file)
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -1301,6 +1301,32 @@ err_out:
 }
 EXPORT_SYMBOL(devfreq_add_governor);
 
+static void devm_devfreq_remove_governor(void *governor)
+{
+       WARN_ON(devfreq_remove_governor(governor));
+}
+
+/**
+ * devm_devfreq_add_governor() - Add devfreq governor
+ * @dev:       device which adds devfreq governor
+ * @governor:  the devfreq governor to be added
+ *
+ * This is a resource-managed variant of devfreq_add_governor().
+ */
+int devm_devfreq_add_governor(struct device *dev,
+                             struct devfreq_governor *governor)
+{
+       int err;
+
+       err = devfreq_add_governor(governor);
+       if (err)
+               return err;
+
+       return devm_add_action_or_reset(dev, devm_devfreq_remove_governor,
+                                       governor);
+}
+EXPORT_SYMBOL(devm_devfreq_add_governor);
+
 /**
  * devfreq_remove_governor() - Remove devfreq feature from a device.
  * @governor:  the devfreq governor to be removed

diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index 2d69a0c..002a7d6 100644 (file)
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -84,6 +84,9 @@ void devfreq_update_interval(struct devfreq *devfreq, unsigned int *delay);
 int devfreq_add_governor(struct devfreq_governor *governor);
 int devfreq_remove_governor(struct devfreq_governor *governor);
 
+int devm_devfreq_add_governor(struct device *dev,
+                             struct devfreq_governor *governor);
+
 int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
 int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);