leds: lp8860: Remove work queue

Now the core implements the work queue, remove it from the drivers,
and switch to using brightness_set_blocking op.

Signed-off-by: Andrew Lunn <[e-mail]>
Acked-by: Dan Murphy <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/leds-lp8860.c

···
 /**
  * struct lp8860_led -
  * @lock - Lock for reading/writing the device
- * @work - Work item used to off load the brightness register writes
  * @client - Pointer to the I2C client
  * @led_dev - led class device pointer
  * @regmap - Devices register map
  * @eeprom_regmap - EEPROM register map
  * @enable_gpio - VDDIO/EN gpio to enable communication interface
  * @regulator - LED supply regulator pointer
- * @brightness - Current brightness value requested
  * @label - LED label
 **/
 struct lp8860_led {
 	struct mutex lock;
-	struct work_struct work;
 	struct i2c_client *client;
 	struct led_classdev led_dev;
 	struct regmap *regmap;
 	struct regmap *eeprom_regmap;
 	struct gpio_desc *enable_gpio;
 	struct regulator *regulator;
-	enum led_brightness brightness;
 	const char *label;
 };
 
···
 	return ret;
 }
 
-static void lp8860_led_brightness_work(struct work_struct *work)
+static int lp8860_brightness_set(struct led_classdev *led_cdev,
+				enum led_brightness brt_val)
 {
-	struct lp8860_led *led = container_of(work, struct lp8860_led, work);
+	struct lp8860_led *led =
+			container_of(led_cdev, struct lp8860_led, led_dev);
+	int disp_brightness = brt_val * 255;
 	int ret;
-	int disp_brightness = led->brightness * 255;
 
 	mutex_lock(&led->lock);
 
···
 	}
 out:
 	mutex_unlock(&led->lock);
-}
-
-static void lp8860_brightness_set(struct led_classdev *led_cdev,
-				enum led_brightness brt_val)
-{
-	struct lp8860_led *led =
-			container_of(led_cdev, struct lp8860_led, led_dev);
-
-	led->brightness = brt_val;
-	schedule_work(&led->work);
+	return ret;
 }
 
 static int lp8860_init(struct lp8860_led *led)
···
 	led->client = client;
 	led->led_dev.name = led->label;
 	led->led_dev.max_brightness = LED_FULL;
-	led->led_dev.brightness_set = lp8860_brightness_set;
+	led->led_dev.brightness_set_blocking = lp8860_brightness_set;
 
 	mutex_init(&led->lock);
-	INIT_WORK(&led->work, lp8860_led_brightness_work);
 
 	i2c_set_clientdata(client, led);
 
···
 	int ret;
 
 	led_classdev_unregister(&led->led_dev);
-	cancel_work_sync(&led->work);
 
 	if (led->enable_gpio)
 		gpiod_direction_output(led->enable_gpio, 0);