hwmon: (emc2103) Convert to devm_hwmon_device_register_with_groups

Use devm_hwmon_device_register_with_groups() to simplify the code a bit.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>

drivers/hwmon/emc2103.c

···
 };
 
 struct emc2103_data {
-	struct device		*hwmon_dev;
+	struct i2c_client	*client;
+	const struct		attribute_group *groups[4];
 	struct mutex		update_lock;
 	bool			valid;		/* registers are valid */
 	bool			fan_rpm_control;
···
 
 static struct emc2103_data *emc2103_update_device(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct emc2103_data *data = i2c_get_clientdata(client);
+	struct emc2103_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 
 	mutex_lock(&data->update_lock);
 
···
 			    const char *buf, size_t count)
 {
 	int nr = to_sensor_dev_attr(da)->index;
-	struct i2c_client *client = to_i2c_client(dev);
-	struct emc2103_data *data = i2c_get_clientdata(client);
+	struct emc2103_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long val;
 
 	int result = kstrtol(buf, 10, &val);
···
 			    const char *buf, size_t count)
 {
 	int nr = to_sensor_dev_attr(da)->index;
-	struct i2c_client *client = to_i2c_client(dev);
-	struct emc2103_data *data = i2c_get_clientdata(client);
+	struct emc2103_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long val;
 
 	int result = kstrtol(buf, 10, &val);
···
 			   const char *buf, size_t count)
 {
 	struct emc2103_data *data = emc2103_update_device(dev);
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = data->client;
 	int new_range_bits, old_div = 8 / data->fan_multiplier;
 	long new_div;
 
···
 			      const char *buf, size_t count)
 {
 	struct emc2103_data *data = emc2103_update_device(dev);
-	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_client *client = data->client;
 	unsigned long rpm_target;
 
 	int result = kstrtoul(buf, 10, &rpm_target);
···
 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *da,
 			      const char *buf, size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct emc2103_data *data = i2c_get_clientdata(client);
+	struct emc2103_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long new_value;
 	u8 conf_reg;
 
···
 emc2103_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
 	struct emc2103_data *data;
-	int status;
+	struct device *hwmon_dev;
+	int status, idx = 0;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -EIO;
···
 		return -ENOMEM;
 
 	i2c_set_clientdata(client, data);
+	data->client = client;
 	mutex_init(&data->update_lock);
 
 	/* 2103-2 and 2103-4 have 3 external diodes, 2103-1 has 1 */
···
 		}
 	}
 
-	/* Register sysfs hooks */
-	status = sysfs_create_group(&client->dev.kobj, &emc2103_group);
-	if (status)
-		return status;
+	/* sysfs hooks */
+	data->groups[idx++] = &emc2103_group;
+	if (data->temp_count >= 3)
+		data->groups[idx++] = &emc2103_temp3_group;
+	if (data->temp_count == 4)
+		data->groups[idx++] = &emc2103_temp4_group;
 
-	if (data->temp_count >= 3) {
-		status = sysfs_create_group(&client->dev.kobj,
-			&emc2103_temp3_group);
-		if (status)
-			goto exit_remove;
-	}
-
-	if (data->temp_count == 4) {
-		status = sysfs_create_group(&client->dev.kobj,
-			&emc2103_temp4_group);
-		if (status)
-			goto exit_remove_temp3;
-	}
-
-	data->hwmon_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		status = PTR_ERR(data->hwmon_dev);
-		goto exit_remove_temp4;
-	}
+	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
+							   client->name, data,
+							   data->groups);
+	if (IS_ERR(hwmon_dev))
+		return PTR_ERR(hwmon_dev);
 
 	dev_info(&client->dev, "%s: sensor '%s'\n",
-		 dev_name(data->hwmon_dev), client->name);
-
-	return 0;
-
-exit_remove_temp4:
-	if (data->temp_count == 4)
-		sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group);
-exit_remove_temp3:
-	if (data->temp_count >= 3)
-		sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group);
-exit_remove:
-	sysfs_remove_group(&client->dev.kobj, &emc2103_group);
-	return status;
-}
-
-static int emc2103_remove(struct i2c_client *client)
-{
-	struct emc2103_data *data = i2c_get_clientdata(client);
-
-	hwmon_device_unregister(data->hwmon_dev);
-
-	if (data->temp_count == 4)
-		sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group);
-
-	if (data->temp_count >= 3)
-		sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group);
-
-	sysfs_remove_group(&client->dev.kobj, &emc2103_group);
+		 dev_name(hwmon_dev), client->name);
 
 	return 0;
 }
···
 		.name	= "emc2103",
 	},
 	.probe		= emc2103_probe,
-	.remove		= emc2103_remove,
 	.id_table	= emc2103_ids,
 	.detect		= emc2103_detect,
 	.address_list	= normal_i2c,