diff --git a/Documentation/power/regulator/regulator.txt b/Documentation/power/regulator/regulator.txt
index 3f8b528f237e..e272d9909e39 100644
--- a/Documentation/power/regulator/regulator.txt
+++ b/Documentation/power/regulator/regulator.txt
@@ -12,7 +12,7 @@ Drivers can register a regulator by calling :-
 
 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
 	struct device *dev, struct regulator_init_data *init_data,
-	void *driver_data);
+	void *driver_data, struct device_node *of_node);
 
 This will register the regulators capabilities and operations to the regulator
 core.
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 72abbf5507a6..a44a017c0864 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -64,7 +64,7 @@ of_get_fixed_voltage_config(struct device *dev)
 	if (!config)
 		return NULL;
 
-	config->init_data = of_get_regulator_init_data(dev);
+	config->init_data = of_get_regulator_init_data(dev, dev->of_node);
 	if (!config->init_data)
 		return NULL;
 
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index acd7045d1601..f1651eb69648 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -34,6 +34,9 @@ static void of_get_regulation_constraints(struct device_node *np,
 	/* Voltage change possible? */
 	if (constraints->min_uV != constraints->max_uV)
 		constraints->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE;
+	/* Only one voltage?  Then make sure it's set. */
+	if (constraints->min_uV == constraints->max_uV)
+		constraints->apply_uV = true;
 
 	uV_offset = of_get_property(np, "regulator-microvolt-offset", NULL);
 	if (uV_offset)
@@ -66,18 +69,19 @@ static void of_get_regulation_constraints(struct device_node *np,
  * tree node, returns a pointer to the populated struture or NULL if memory
  * alloc fails.
  */
-struct regulator_init_data *of_get_regulator_init_data(struct device *dev)
+struct regulator_init_data *of_get_regulator_init_data(struct device *dev,
+						struct device_node *node)
 {
 	struct regulator_init_data *init_data;
 
-	if (!dev->of_node)
+	if (!node)
 		return NULL;
 
 	init_data = devm_kzalloc(dev, sizeof(*init_data), GFP_KERNEL);
 	if (!init_data)
 		return NULL; /* Out of memory? */
 
-	of_get_regulation_constraints(dev->of_node, &init_data);
+	of_get_regulation_constraints(node, &init_data);
 	return init_data;
 }
 EXPORT_SYMBOL_GPL(of_get_regulator_init_data);
diff --git a/include/linux/regulator/of_regulator.h b/include/linux/regulator/of_regulator.h
index d83a98d3e3fd..769704f296e5 100644
--- a/include/linux/regulator/of_regulator.h
+++ b/include/linux/regulator/of_regulator.h
@@ -8,10 +8,12 @@
 
 #if defined(CONFIG_OF)
 extern struct regulator_init_data
-	*of_get_regulator_init_data(struct device *dev);
+	*of_get_regulator_init_data(struct device *dev,
+				    struct device_node *node);
 #else
 static inline struct regulator_init_data
-	*of_get_regulator_init_data(struct device *dev)
+	*of_get_regulator_init_data(struct device *dev,
+				    struct device_node *node)
 {
 	return NULL;
 }