leds-lp55xx: use lp55xx_unregister_leds()

 To unregister led class devices and sysfs attributes,
 LP5521 and LP5523 have each driver function.
 This patch makes both drivers simple using common driver function,
 lp55xx_unregister_leds().

 And some unused variables are removed.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-lp5521.c

@@ -567,9 +567,6 @@ static ssize_t store_led_pattern(struct device *dev,
 	return len;
 }
 
-static struct attribute_group lp5521_led_attribute_group = {
-};
-
 /* device attributes */
 static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
 		   show_engine1_mode, store_engine1_mode);
@@ -607,25 +604,9 @@ static int lp5521_register_sysfs(struct i2c_client *client)
 
 static void lp5521_unregister_sysfs(struct i2c_client *client)
 {
-	struct lp5521_chip *chip = i2c_get_clientdata(client);
 	struct device *dev = &client->dev;
-	int i;
 
 	sysfs_remove_group(&dev->kobj, &lp5521_group);
-
-	for (i = 0; i < chip->num_leds; i++)
-		sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
-				&lp5521_led_attribute_group);
-}
-
-static void lp5521_unregister_leds(struct lp5521_chip *chip)
-{
-	int i;
-
-	for (i = 0; i < chip->num_leds; i++) {
-		led_classdev_unregister(&chip->leds[i].cdev);
-		cancel_work_sync(&chip->leds[i].brightness_work);
-	}
 }
 
 /* Chip specific configurations */
@@ -647,7 +628,6 @@ static struct lp55xx_device_config lp5521_cfg = {
 static int lp5521_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
-	struct lp5521_chip		*old_chip = NULL;
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
@@ -692,7 +672,7 @@ static int lp5521_probe(struct i2c_client *client,
 	}
 	return ret;
 fail2:
-	lp5521_unregister_leds(old_chip);
+	lp55xx_unregister_leds(led, chip);
 err_register_leds:
 	lp55xx_deinit_device(chip);
 err_init:
@@ -708,7 +688,7 @@ static int lp5521_remove(struct i2c_client *client)
 	lp5521_run_led_pattern(PATTERN_OFF, old_chip);
 	lp5521_unregister_sysfs(client);
 
-	lp5521_unregister_leds(old_chip);
+	lp55xx_unregister_leds(led, chip);
 	lp55xx_deinit_device(chip);
 
 	return 0;

drivers/leds/leds-lp5523.c

@@ -609,9 +609,6 @@ store_mode(1)
 store_mode(2)
 store_mode(3)
 
-static struct attribute_group lp5523_led_attribute_group = {
-};
-
 /* device attributes */
 static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
 		   show_engine1_mode, store_engine1_mode);
@@ -662,15 +659,9 @@ static int lp5523_register_sysfs(struct i2c_client *client)
 
 static void lp5523_unregister_sysfs(struct i2c_client *client)
 {
-	struct lp5523_chip *chip = i2c_get_clientdata(client);
 	struct device *dev = &client->dev;
-	int i;
 
 	sysfs_remove_group(&dev->kobj, &lp5523_group);
-
-	for (i = 0; i < chip->num_leds; i++)
-		sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
-				&lp5523_led_attribute_group);
 }
 
 /*--------------------------------------------------------------*/
@@ -703,16 +694,6 @@ static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
 /*--------------------------------------------------------------*/
 /*			Probe, Attach, Remove			*/
 /*--------------------------------------------------------------*/
-static void lp5523_unregister_leds(struct lp5523_chip *chip)
-{
-	int i;
-
-	for (i = 0; i < chip->num_leds; i++) {
-		led_classdev_unregister(&chip->leds[i].cdev);
-		flush_work(&chip->leds[i].brightness_work);
-	}
-}
-
 /* Chip specific configurations */
 static struct lp55xx_device_config lp5523_cfg = {
 	.reset = {
@@ -732,7 +713,6 @@ static struct lp55xx_device_config lp5523_cfg = {
 static int lp5523_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
-	struct lp5523_chip		*old_chip = NULL;
 	int ret;
 	struct lp55xx_chip *chip;
 	struct lp55xx_led *led;
@@ -777,7 +757,7 @@ static int lp5523_probe(struct i2c_client *client,
 	}
 	return ret;
 fail2:
-	lp5523_unregister_leds(old_chip);
+	lp55xx_unregister_leds(led, chip);
 err_register_leds:
 	lp55xx_deinit_device(chip);
 err_init:
@@ -786,7 +766,6 @@ static int lp5523_probe(struct i2c_client *client,
 
 static int lp5523_remove(struct i2c_client *client)
 {
-	struct lp5523_chip *old_chip = i2c_get_clientdata(client);
 	struct lp55xx_led *led = i2c_get_clientdata(client);
 	struct lp55xx_chip *chip = led->chip;
 
@@ -795,7 +774,7 @@ static int lp5523_remove(struct i2c_client *client)
 
 	lp5523_unregister_sysfs(client);
 
-	lp5523_unregister_leds(old_chip);
+	lp55xx_unregister_leds(led, chip);
 	lp55xx_deinit_device(chip);
 
 	return 0;

drivers/leds/leds-lp55xx-common.c

@@ -353,6 +353,22 @@ int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
 }
 EXPORT_SYMBOL_GPL(lp55xx_register_leds);
 
+void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
+{
+	int i;
+	struct lp55xx_led *each;
+	struct kobject *kobj;
+
+	for (i = 0; i < chip->num_leds; i++) {
+		each = led + i;
+		kobj = &led->cdev.dev->kobj;
+		sysfs_remove_group(kobj, &lp55xx_led_attr_group);
+		led_classdev_unregister(&each->cdev);
+		flush_work(&each->brightness_work);
+	}
+}
+EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
+
 MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
 MODULE_DESCRIPTION("LP55xx Common Driver");
 MODULE_LICENSE("GPL");

drivers/leds/leds-lp55xx-common.h

@@ -101,4 +101,6 @@ extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
 /* common LED class device functions */
 extern int lp55xx_register_leds(struct lp55xx_led *led,
 				struct lp55xx_chip *chip);
+extern void lp55xx_unregister_leds(struct lp55xx_led *led,
+				struct lp55xx_chip *chip);
 #endif /* _LEDS_LP55XX_COMMON_H */