leds: lp8860: Enable regulator using enable_optional helper

This allows the regulator to be optional which is the same as
done here with all the checks for NULL. This also disables
on remove for us, so remove the manual disabling.

Signed-off-by: Andrew Davis <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: glneo

drivers/leds/leds-lp8860.c

@@ -91,7 +91,6 @@
  * @regmap: Devices register map
  * @eeprom_regmap: EEPROM register map
  * @enable_gpio: VDDIO/EN gpio to enable communication interface
- * @regulator: LED supply regulator pointer
  */
 struct lp8860_led {
 	struct mutex lock;
@@ -100,7 +99,6 @@ struct lp8860_led {
 	struct regmap *regmap;
 	struct regmap *eeprom_regmap;
 	struct gpio_desc *enable_gpio;
-	struct regulator *regulator;
 };
 
 static const struct reg_sequence lp8860_eeprom_disp_regs[] = {
@@ -232,15 +230,6 @@ static int lp8860_init(struct lp8860_led *led)
 	unsigned int read_buf;
 	int ret, reg_count;
 
-	if (led->regulator) {
-		ret = regulator_enable(led->regulator);
-		if (ret) {
-			dev_err(&led->client->dev,
-				"Failed to enable regulator\n");
-			return ret;
-		}
-	}
-
 	gpiod_direction_output(led->enable_gpio, 1);
 
 	ret = lp8860_fault_check(led);
@@ -282,13 +271,6 @@ static int lp8860_init(struct lp8860_led *led)
 	if (ret)
 		gpiod_direction_output(led->enable_gpio, 0);
 
-	if (led->regulator) {
-		ret = regulator_disable(led->regulator);
-		if (ret)
-			dev_err(&led->client->dev,
-				"Failed to disable regulator\n");
-	}
-
 	return ret;
 }
 
@@ -330,9 +312,10 @@ static int lp8860_probe(struct i2c_client *client)
 		return ret;
 	}
 
-	led->regulator = devm_regulator_get(&client->dev, "vled");
-	if (IS_ERR(led->regulator))
-		led->regulator = NULL;
+	ret = devm_regulator_get_enable_optional(&client->dev, "vled");
+	if (ret && ret != -ENODEV)
+		return dev_err_probe(&client->dev, ret,
+				     "Failed to enable vled regulator\n");
 
 	led->client = client;
 	led->led_dev.brightness_set_blocking = lp8860_brightness_set;
@@ -381,13 +364,6 @@ static void lp8860_remove(struct i2c_client *client)
 	int ret;
 
 	gpiod_direction_output(led->enable_gpio, 0);
-
-	if (led->regulator) {
-		ret = regulator_disable(led->regulator);
-		if (ret)
-			dev_err(&led->client->dev,
-				"Failed to disable regulator\n");
-	}
 }
 
 static const struct i2c_device_id lp8860_id[] = {