diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 058c8b6d2871ca6687148b84b7fa924377362f3d..e12d3a8a29a9490cdb5f886d0199332d9eb61e7a 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1501,6 +1501,52 @@ struct generic_pm_domain *of_genpd_get_from_provider(
 }
 EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
 
+/**
+ * of_genpd_add_device() - Add a device to an I/O PM domain
+ * @genpdspec: OF phandle args to use for look-up PM domain
+ * @dev: Device to be added.
+ *
+ * Looks-up an I/O PM domain based upon phandle args provided and adds
+ * the device to the PM domain. Returns a negative error code on failure.
+ */
+int of_genpd_add_device(struct of_phandle_args *genpdspec, struct device *dev)
+{
+	struct generic_pm_domain *genpd;
+
+	genpd = of_genpd_get_from_provider(genpdspec);
+	if (IS_ERR(genpd))
+		return PTR_ERR(genpd);
+
+	return pm_genpd_add_device(genpd, dev);
+}
+EXPORT_SYMBOL_GPL(of_genpd_add_device);
+
+/**
+ * of_genpd_add_subdomain - Add a subdomain to an I/O PM domain.
+ * @parent_spec: OF phandle args to use for parent PM domain look-up
+ * @subdomain_spec: OF phandle args to use for subdomain look-up
+ *
+ * Looks-up a parent PM domain and subdomain based upon phandle args
+ * provided and adds the subdomain to the parent PM domain. Returns a
+ * negative error code on failure.
+ */
+int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
+			   struct of_phandle_args *subdomain_spec)
+{
+	struct generic_pm_domain *parent, *subdomain;
+
+	parent = of_genpd_get_from_provider(parent_spec);
+	if (IS_ERR(parent))
+		return PTR_ERR(parent);
+
+	subdomain = of_genpd_get_from_provider(subdomain_spec);
+	if (IS_ERR(subdomain))
+		return PTR_ERR(subdomain);
+
+	return pm_genpd_add_subdomain(parent, subdomain);
+}
+EXPORT_SYMBOL_GPL(of_genpd_add_subdomain);
+
 /**
  * genpd_dev_pm_detach - Detach a device from its PM domain.
  * @dev: Device to detach.
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 31fec858088cb31ef4cc30e76514ebc0967dc682..e1964a242389f1ed577b19e47242c8ef3a3e99d8 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -208,6 +208,10 @@ struct generic_pm_domain *__of_genpd_xlate_simple(
 struct generic_pm_domain *__of_genpd_xlate_onecell(
 					struct of_phandle_args *genpdspec,
 					void *data);
+extern int of_genpd_add_device(struct of_phandle_args *args,
+			       struct device *dev);
+extern int of_genpd_add_subdomain(struct of_phandle_args *parent,
+				  struct of_phandle_args *new_subdomain);
 
 int genpd_dev_pm_attach(struct device *dev);
 #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
@@ -227,6 +231,18 @@ static inline struct generic_pm_domain *of_genpd_get_from_provider(
 #define __of_genpd_xlate_simple		NULL
 #define __of_genpd_xlate_onecell	NULL
 
+static inline int of_genpd_add_device(struct of_phandle_args *args,
+				      struct device *dev)
+{
+	return -ENODEV;
+}
+
+static inline int of_genpd_add_subdomain(struct of_phandle_args *parent,
+					 struct of_phandle_args *new_subdomain)
+{
+	return -ENODEV;
+}
+
 static inline int genpd_dev_pm_attach(struct device *dev)
 {
 	return -ENODEV;