hwmon: (smsc47b397) 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 <axel.lin@ingics.com>
Tested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/smsc47b397.c

@@ -100,8 +100,6 @@ static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
 
 struct smsc47b397_data {
 	unsigned short addr;
-	const char *name;
-	struct device *hwmon_dev;
 	struct mutex lock;
 
 	struct mutex update_lock;
@@ -202,15 +200,7 @@ static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
 
-static ssize_t show_name(struct device *dev, struct device_attribute
-			 *devattr, char *buf)
-{
-	struct smsc47b397_data *data = dev_get_drvdata(dev);
-	return sprintf(buf, "%s\n", data->name);
-}
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
-
-static struct attribute *smsc47b397_attributes[] = {
+static struct attribute *smsc47b397_attrs[] = {
 	&sensor_dev_attr_temp1_input.dev_attr.attr,
 	&sensor_dev_attr_temp2_input.dev_attr.attr,
 	&sensor_dev_attr_temp3_input.dev_attr.attr,
@@ -220,23 +210,10 @@ static struct attribute *smsc47b397_attributes[] = {
 	&sensor_dev_attr_fan3_input.dev_attr.attr,
 	&sensor_dev_attr_fan4_input.dev_attr.attr,
 
-	&dev_attr_name.attr,
 	NULL
 };
 
-static const struct attribute_group smsc47b397_group = {
-	.attrs = smsc47b397_attributes,
-};
-
-static int smsc47b397_remove(struct platform_device *pdev)
-{
-	struct smsc47b397_data *data = platform_get_drvdata(pdev);
-
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
-
-	return 0;
-}
+ATTRIBUTE_GROUPS(smsc47b397);
 
 static int smsc47b397_probe(struct platform_device *pdev);
 
@@ -246,15 +223,14 @@ static struct platform_driver smsc47b397_driver = {
 		.name	= DRVNAME,
 	},
 	.probe		= smsc47b397_probe,
-	.remove		= smsc47b397_remove,
 };
 
 static int smsc47b397_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct smsc47b397_data *data;
+	struct device *hwmon_dev;
 	struct resource *res;
-	int err = 0;
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 	if (!devm_request_region(dev, res->start, SMSC_EXTENT,
@@ -270,26 +246,13 @@ static int smsc47b397_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	data->addr = res->start;
-	data->name = "smsc47b397";
 	mutex_init(&data->lock);
 	mutex_init(&data->update_lock);
-	platform_set_drvdata(pdev, data);
-
-	err = sysfs_create_group(&dev->kobj, &smsc47b397_group);
-	if (err)
-		return err;
 
-	data->hwmon_dev = hwmon_device_register(dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		err = PTR_ERR(data->hwmon_dev);
-		goto error_remove;
-	}
-
-	return 0;
-
-error_remove:
-	sysfs_remove_group(&dev->kobj, &smsc47b397_group);
-	return err;
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev, "smsc47b397",
+							   data,
+							   smsc47b397_groups);
+	return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
 static int __init smsc47b397_device_add(unsigned short address)