@@ -17,6 +17,7 @@
 #include <linux/mod_devicetable.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>

@@ -113,14 +114,25 @@ static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
 	return ret;
 }
 
-static void lm3533_enable(struct lm3533 *lm3533)
+static int lm3533_enable(struct lm3533 *lm3533)
 {
+	int ret;
+
+	ret = regulator_enable(lm3533->vin_supply);
+	if (ret) {
+		dev_err(lm3533->dev, "failed to enable vin power supply\n");
+		return ret;
+	}
+
 	gpiod_set_value(lm3533->hwen, 1);
+
+	return 0;
 }
 
 static void lm3533_disable(struct lm3533 *lm3533)
 {
 	gpiod_set_value(lm3533->hwen, 0);
+	regulator_disable(lm3533->vin_supply);
 }
 
 enum lm3533_attribute_type {

@@ -334,7 +346,9 @@ static int lm3533_device_init(struct lm3533 *lm3533)
 		}
 	}
 
-	lm3533_enable(lm3533);
+	ret = lm3533_enable(lm3533);
+	if (ret)
+		return ret;
 
 	ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
 				 LM3533_BOOST_FREQ_MASK,

@@ -458,6 +472,11 @@ static int lm3533_i2c_probe(struct i2c_client *i2c)
 		return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->hwen),
 				     "failed to get HWEN GPIO\n");
 
+	lm3533->vin_supply = devm_regulator_get(lm3533->dev, "vin");
+	if (IS_ERR(lm3533->vin_supply))
+		return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->vin_supply),
+				     "failed to get vin-supply\n");
+
 	device_property_read_u32(lm3533->dev, "ti,boost-ovp-microvolt",
 				 &lm3533->boost_ovp);
 

@@ -22,6 +22,7 @@
 struct device;
 struct gpio_desc;
 struct regmap;
+struct regulator;
 
 struct lm3533 {
 	struct device *dev;

@@ -29,6 +30,7 @@ struct lm3533 {
 	struct regmap *regmap;
 
 	struct gpio_desc *hwen;
+	struct regulator *vin_supply;
 
 	u32 boost_ovp;
 	u32 boost_freq;