3 files changed, 12 insertions, 33 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 916cadf45279..960103a61000 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2582,6 +2582,8 @@ static int _regulator_get_voltage(struct regulator_dev *rdev)
 		ret = rdev->desc->ops->get_voltage(rdev);
 	} else if (rdev->desc->ops->list_voltage) {
 		ret = rdev->desc->ops->list_voltage(rdev, 0);
+	} else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) {
+		ret = rdev->desc->fixed_uV;
 	} else {
 		return -EINVAL;
 	}
@@ -3217,7 +3219,8 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
 	/* some attributes need specific methods to be displayed */
 	if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
 	    (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
-	    (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0)) {
+	    (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) ||
+		(rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1))) {
 		status = device_create_file(dev, &dev_attr_microvolts);
 		if (status < 0)
 			return status;
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 7610920014d7..5ea64b94341c 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -34,7 +34,6 @@
 struct fixed_voltage_data {
 	struct regulator_desc desc;
 	struct regulator_dev *dev;
-	int microvolts;
 };
 
 
@@ -108,30 +107,7 @@ of_get_fixed_voltage_config(struct device *dev)
 	return config;
 }
 
-static int fixed_voltage_get_voltage(struct regulator_dev *dev)
-{
-	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
-
-	if (data->microvolts)
-		return data->microvolts;
-	else
-		return -EINVAL;
-}
-
-static int fixed_voltage_list_voltage(struct regulator_dev *dev,
-				      unsigned selector)
-{
-	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
-
-	if (selector != 0)
-		return -EINVAL;
-
-	return data->microvolts;
-}
-
 static struct regulator_ops fixed_voltage_ops = {
-	.get_voltage = fixed_voltage_get_voltage,
-	.list_voltage = fixed_voltage_list_voltage,
 };
 
 static int reg_fixed_voltage_probe(struct platform_device *pdev)
@@ -186,23 +162,21 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 	if (config->microvolts)
 		drvdata->desc.n_voltages = 1;
 
-	drvdata->microvolts = config->microvolts;
+	drvdata->desc.fixed_uV = config->microvolts;
 
 	if (config->gpio >= 0)
 		cfg.ena_gpio = config->gpio;
 	cfg.ena_gpio_invert = !config->enable_high;
 	if (config->enabled_at_boot) {
-		if (config->enable_high) {
+		if (config->enable_high)
 			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
-		} else {
+		else
 			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
-		}
 	} else {
-		if (config->enable_high) {
+		if (config->enable_high)
 			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
-		} else {
+		else
 			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
-		}
 	}
 	if (config->gpio_is_open_drain)
 		cfg.ena_gpio_flags |= GPIOF_OPEN_DRAIN;
@@ -222,7 +196,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, drvdata);
 
 	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,
-		drvdata->microvolts);
+		drvdata->desc.fixed_uV);
 
 	return 0;
 
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 779b877e0fa1..c8b492c6b6a8 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -209,6 +209,7 @@ enum regulator_type {
  * @min_uV: Voltage given by the lowest selector (if linear mapping)
  * @uV_step: Voltage increase with each selector (if linear mapping)
  * @linear_min_sel: Minimal selector for starting linear mapping
+ * @fixed_uV: Fixed voltage of rails.
  * @ramp_delay: Time to settle down after voltage change (unit: uV/us)
  * @volt_table: Voltage mapping table (if table based mapping)
  *
@@ -241,6 +242,7 @@ struct regulator_desc {
 	unsigned int min_uV;
 	unsigned int uV_step;
 	unsigned int linear_min_sel;
+	int fixed_uV;
 	unsigned int ramp_delay;
 
 	const struct regulator_linear_range *linear_ranges;