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authorChanwoo Choi <cw00.choi@samsung.com>2014-05-09 11:43:09 +0400
committerMyungJoo Ham <myungjoo.ham@samsung.com>2014-05-24 17:33:41 +0400
commitd5b040d0cab9cae1dc1ad61a07019062235f4878 (patch)
tree5a07548db72e502f84692e9fa7d9e14287ffd9cb /drivers/devfreq
parent8cd84092d35e52372da2c3c3c2afb1a719917af2 (diff)
downloadlinux-d5b040d0cab9cae1dc1ad61a07019062235f4878.tar.xz
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>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/devfreq.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 8b6295d9d1f5..9f90369dd6bd 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -1169,6 +1169,54 @@ int devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq)
return ret;
}
+static void devm_devfreq_opp_release(struct device *dev, void *res)
+{
+ devfreq_unregister_opp_notifier(dev, *(struct devfreq **)res);
+}
+
+/**
+ * devm_ devfreq_register_opp_notifier()
+ * - Resource-managed devfreq_register_opp_notifier()
+ * @dev: The devfreq user device. (parent of devfreq)
+ * @devfreq: The devfreq object.
+ */
+int devm_devfreq_register_opp_notifier(struct device *dev,
+ struct devfreq *devfreq)
+{
+ struct devfreq **ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_devfreq_opp_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = devfreq_register_opp_notifier(dev, devfreq);
+ if (ret) {
+ devres_free(ptr);
+ return ret;
+ }
+
+ *ptr = devfreq;
+ devres_add(dev, ptr);
+
+ return 0;
+}
+EXPORT_SYMBOL(devm_devfreq_register_opp_notifier);
+
+/**
+ * devm_devfreq_unregister_opp_notifier()
+ * - Resource-managed devfreq_unregister_opp_notifier()
+ * @dev: The devfreq user device. (parent of devfreq)
+ * @devfreq: The devfreq object.
+ */
+void devm_devfreq_unregister_opp_notifier(struct device *dev,
+ struct devfreq *devfreq)
+{
+ WARN_ON(devres_release(dev, devm_devfreq_opp_release,
+ devm_devfreq_dev_match, devfreq));
+}
+EXPORT_SYMBOL(devm_devfreq_unregister_opp_notifier);
+
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
MODULE_DESCRIPTION("devfreq class support");
MODULE_LICENSE("GPL");