diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index af83ad58819c..16503ab10a79 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -486,6 +486,21 @@ int extcon_sync(struct extcon_dev *edev, unsigned int id)
 }
 EXPORT_SYMBOL_GPL(extcon_sync);
 
+int extcon_blocking_sync(struct extcon_dev *edev, unsigned int id, bool val)
+{
+	int index;
+
+	if (!edev)
+		return -EINVAL;
+
+	index = find_cable_index_by_id(edev, id);
+	if (index < 0)
+		return index;
+
+	return blocking_notifier_call_chain(&edev->bnh[index], val, edev);
+}
+EXPORT_SYMBOL(extcon_blocking_sync);
+
 /**
  * extcon_get_state() - Get the state of an external connector.
  * @edev:	the extcon device
@@ -924,6 +939,38 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
 }
 EXPORT_SYMBOL_GPL(extcon_register_notifier);
 
+int extcon_register_blocking_notifier(struct extcon_dev *edev, unsigned int id,
+			struct notifier_block *nb)
+{
+	int idx = -EINVAL;
+
+	if (!edev || !nb)
+		return -EINVAL;
+
+	idx = find_cable_index_by_id(edev, id);
+	if (idx < 0)
+		return idx;
+
+	return blocking_notifier_chain_register(&edev->bnh[idx], nb);
+}
+EXPORT_SYMBOL(extcon_register_blocking_notifier);
+
+int extcon_unregister_blocking_notifier(struct extcon_dev *edev,
+			unsigned int id, struct notifier_block *nb)
+{
+	int idx;
+
+	if (!edev || !nb)
+		return -EINVAL;
+
+	idx = find_cable_index_by_id(edev, id);
+	if (idx < 0)
+		return idx;
+
+	return blocking_notifier_chain_unregister(&edev->bnh[idx], nb);
+}
+EXPORT_SYMBOL(extcon_unregister_blocking_notifier);
+
 /**
  * extcon_unregister_notifier() - Unregister a notifier block from the extcon.
  * @edev:	the extcon device
@@ -1258,6 +1305,13 @@ int extcon_dev_register(struct extcon_dev *edev)
 		goto err_dev;
 	}
 
+	edev->bnh = devm_kzalloc(&edev->dev,
+			sizeof(*edev->bnh) * edev->max_supported, GFP_KERNEL);
+	if (!edev->bnh) {
+		ret = -ENOMEM;
+		goto err_dev;
+	}
+
 	for (index = 0; index < edev->max_supported; index++)
 		RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]);
 
diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h
index 93b5e0306966..5b200dd37e43 100644
--- a/drivers/extcon/extcon.h
+++ b/drivers/extcon/extcon.h
@@ -48,6 +48,7 @@ struct extcon_dev {
 	struct device dev;
 	struct raw_notifier_head nh_all;
 	struct raw_notifier_head *nh;
+	struct blocking_notifier_head *bnh;
 	struct list_head entry;
 	int max_supported;
 	spinlock_t lock;	/* could be called by irq handler */
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 7f033b1ea568..783b8627d039 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -208,6 +208,10 @@ extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
 				struct notifier_block *nb);
 extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
 				struct notifier_block *nb);
+extern int extcon_register_blocking_notifier(struct extcon_dev *edev,
+		unsigned int id, struct notifier_block *nb);
+extern int extcon_unregister_blocking_notifier(struct extcon_dev *edev,
+		unsigned int id, struct notifier_block *nb);
 extern int devm_extcon_register_notifier(struct device *dev,
 				struct extcon_dev *edev, unsigned int id,
 				struct notifier_block *nb);
@@ -237,6 +241,8 @@ extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
 /* Following API get the name of extcon device. */
 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
 
+extern int extcon_blocking_sync(struct extcon_dev *edev, unsigned int id,
+							bool val);
 #else /* CONFIG_EXTCON */
 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
 {
@@ -268,6 +274,20 @@ static inline int extcon_unregister_notifier(struct extcon_dev *edev,
 	return 0;
 }
 
+static inline int extcon_register_blocking_notifier(struct extcon_dev *edev,
+					unsigned int id,
+					struct notifier_block *nb)
+{
+	return 0;
+}
+
+static inline int extcon_unregister_blocking_notifier(struct extcon_dev *edev,
+					unsigned int id,
+					struct notifier_block *nb)
+{
+	return 0;
+}
+
 static inline int devm_extcon_register_notifier(struct device *dev,
 				struct extcon_dev *edev, unsigned int id,
 				struct notifier_block *nb)