hwmon: (adt7411) 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>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 20 insertions, 39 deletions

diff --git a/drivers/hwmon/adt7411.c b/drivers/hwmon/adt7411.c
index d9299dee37d1..827c03703128 100644
--- a/drivers/hwmon/adt7411.c
+++ b/drivers/hwmon/adt7411.c
@@ -51,7 +51,7 @@ struct adt7411_data {
         struct mutex update_lock;
         unsigned long next_update;
         int vref_cached;
-        struct device *hwmon_dev;
+        struct i2c_client *client;
 };
 
 /*
@@ -111,7 +111,8 @@ static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
 static ssize_t adt7411_show_vdd(struct device *dev,
                                 struct device_attribute *attr, char *buf)
 {
-        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7411_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
                         ADT7411_REG_VDD_MSB, 2);
 
@@ -121,7 +122,8 @@ static ssize_t adt7411_show_vdd(struct device *dev,
 static ssize_t adt7411_show_temp(struct device *dev,
                         struct device_attribute *attr, char *buf)
 {
-        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7411_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int val = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
                         ADT7411_REG_INT_TEMP_MSB, 0);
 
@@ -137,8 +139,8 @@ static ssize_t adt7411_show_input(struct device *dev,
                                   struct device_attribute *attr, char *buf)
 {
         int nr = to_sensor_dev_attr(attr)->index;
-        struct i2c_client *client = to_i2c_client(dev);
-        struct adt7411_data *data = i2c_get_clientdata(client);
+        struct adt7411_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int val;
         u8 lsb_reg, lsb_shift;
 
@@ -180,7 +182,8 @@ static ssize_t adt7411_show_bit(struct device *dev,
                                 struct device_attribute *attr, char *buf)
 {
         struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
-        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7411_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int ret = i2c_smbus_read_byte_data(client, attr2->index);
 
         return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
@@ -191,8 +194,8 @@ static ssize_t adt7411_set_bit(struct device *dev,
                                size_t count)
 {
         struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
-        struct i2c_client *client = to_i2c_client(dev);
-        struct adt7411_data *data = i2c_get_clientdata(client);
+        struct adt7411_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int ret;
         unsigned long flag;
 
@@ -245,9 +248,7 @@ static struct attribute *adt7411_attrs[] = {
         NULL
 };
 
-static const struct attribute_group adt7411_attr_grp = {
-        .attrs = adt7411_attrs,
-};
+ATTRIBUTE_GROUPS(adt7411);
 
 static int adt7411_detect(struct i2c_client *client,
                           struct i2c_board_info *info)
@@ -281,14 +282,17 @@ static int adt7411_detect(struct i2c_client *client,
 static int adt7411_probe(struct i2c_client *client,
                                    const struct i2c_device_id *id)
 {
+        struct device *dev = &client->dev;
         struct adt7411_data *data;
+        struct device *hwmon_dev;
         int ret;
 
-        data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+        data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
         i2c_set_clientdata(client, data);
+        data->client = client;
         mutex_init(&data->device_lock);
         mutex_init(&data->update_lock);
 
@@ -300,32 +304,10 @@ static int adt7411_probe(struct i2c_client *client,
         /* force update on first occasion */
         data->next_update = jiffies;
 
-        ret = sysfs_create_group(&client->dev.kobj, &adt7411_attr_grp);
-        if (ret)
-                return ret;
-
-        data->hwmon_dev = hwmon_device_register(&client->dev);
-        if (IS_ERR(data->hwmon_dev)) {
-                ret = PTR_ERR(data->hwmon_dev);
-                goto exit_remove;
-        }
-
-        dev_info(&client->dev, "successfully registered\n");
-
-        return 0;
-
- exit_remove:
-        sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
-        return ret;
-}
-
-static int adt7411_remove(struct i2c_client *client)
-{
-        struct adt7411_data *data = i2c_get_clientdata(client);
-
-        hwmon_device_unregister(data->hwmon_dev);
-        sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
-        return 0;
+        hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+                                                           data,
+                                                           adt7411_groups);
+        return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
 static const struct i2c_device_id adt7411_id[] = {
@@ -339,7 +321,6 @@ static struct i2c_driver adt7411_driver = {
                 .name           = "adt7411",
         },
         .probe  = adt7411_probe,
-        .remove = adt7411_remove,
         .id_table = adt7411_id,
         .detect = adt7411_detect,
         .address_list = normal_i2c,