hwmon: (adt7470) Convert to devm_hwmon_device_register_with_groups

Use ATTRIBUTE_GROUPS macro and 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/adt7470.c

···
 #define FAN_DATA_VALID(x)	((x) && (x) != FAN_PERIOD_INVALID)
 
 struct adt7470_data {
-	struct device		*hwmon_dev;
-	struct attribute_group	attrs;
+	struct i2c_client	*client;
 	struct mutex		lock;
 	char			sensors_valid;
 	char			limits_valid;
···
 
 static struct adt7470_data *adt7470_update_device(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	unsigned long local_jiffies = jiffies;
 	u8 cfg;
 	int i;
···
 					const char *buf,
 					size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 				    const char *buf,
 				    size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			    size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			    size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			   const char *buf, size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp) || !temp)
···
 			   const char *buf, size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp) || !temp)
···
 				 const char *buf,
 				 size_t count)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 	u8 reg;
 
···
 			const char *buf, size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			   size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			   size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			    size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	long temp;
 
 	if (kstrtol(buf, 10, &temp))
···
 			    size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
 	int pwm_auto_reg_mask;
 	long temp;
···
 				 size_t count)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adt7470_data *data = i2c_get_clientdata(client);
+	struct adt7470_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
 	long temp;
 	u8 reg;
···
 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
 		    show_pwm_auto_temp, set_pwm_auto_temp, 3);
 
-static struct attribute *adt7470_attr[] = {
+static struct attribute *adt7470_attrs[] = {
 	&dev_attr_alarm_mask.attr,
 	&dev_attr_num_temp_sensors.attr,
 	&dev_attr_auto_update_interval.attr,
···
 	NULL
 };
 
+ATTRIBUTE_GROUPS(adt7470);
+
 /* Return 0 if detection is successful, -ENODEV otherwise */
 static int adt7470_detect(struct i2c_client *client,
 			  struct i2c_board_info *info)
···
 static int adt7470_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
+	struct device *dev = &client->dev;
 	struct adt7470_data *data;
-	int err;
+	struct device *hwmon_dev;
 
-	data = devm_kzalloc(&client->dev, sizeof(struct adt7470_data),
-			    GFP_KERNEL);
+	data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
···
 	data->auto_update_interval = AUTO_UPDATE_INTERVAL;
 
 	i2c_set_clientdata(client, data);
+	data->client = client;
 	mutex_init(&data->lock);
 
 	dev_info(&client->dev, "%s chip found\n", client->name);
···
 	adt7470_init_client(client);
 
 	/* Register sysfs hooks */
-	data->attrs.attrs = adt7470_attr;
-	err = sysfs_create_group(&client->dev.kobj, &data->attrs);
-	if (err)
-		return err;
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+							   data,
+							   adt7470_groups);
 
-	data->hwmon_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		err = PTR_ERR(data->hwmon_dev);
-		goto exit_remove;
-	}
+	if (IS_ERR(hwmon_dev))
+		return PTR_ERR(hwmon_dev);
 
 	init_completion(&data->auto_update_stop);
 	data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
-					dev_name(data->hwmon_dev));
+					dev_name(hwmon_dev));
 	if (IS_ERR(data->auto_update)) {
-		err = PTR_ERR(data->auto_update);
-		goto exit_unregister;
+		return PTR_ERR(data->auto_update);
 	}
 
 	return 0;
-
-exit_unregister:
-	hwmon_device_unregister(data->hwmon_dev);
-exit_remove:
-	sysfs_remove_group(&client->dev.kobj, &data->attrs);
-	return err;
 }
 
 static int adt7470_remove(struct i2c_client *client)
···
 
 	kthread_stop(data->auto_update);
 	wait_for_completion(&data->auto_update_stop);
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&client->dev.kobj, &data->attrs);
 	return 0;
 }