hwmon: (ltc4151) 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: Per Dalén <per.dalen@appeartv.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/ltc4151.c b/drivers/hwmon/ltc4151.c
index af81be1..c86a184 100644 (file)
--- a/drivers/hwmon/ltc4151.c
+++ b/drivers/hwmon/ltc4151.c
@@ -47,7 +47,7 @@
 #define LTC4151_ADIN_L 0x05
 
 struct ltc4151_data {
-       struct device *hwmon_dev;
+       struct i2c_client *client;
 
        struct mutex update_lock;
        bool valid;
@@ -59,8 +59,8 @@ struct ltc4151_data {
 
 static struct ltc4151_data *ltc4151_update_device(struct device *dev)
 {
-       struct i2c_client *client = to_i2c_client(dev);
-       struct ltc4151_data *data = i2c_get_clientdata(client);
+       struct ltc4151_data *data = dev_get_drvdata(dev);
+       struct i2c_client *client = data->client;
        struct ltc4151_data *ret = data;
 
        mutex_lock(&data->update_lock);
@@ -159,7 +159,7 @@ static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4151_show_value, NULL,
  * Finally, construct an array of pointers to members of the above objects,
  * as required for sysfs_create_group()
  */
-static struct attribute *ltc4151_attributes[] = {
+static struct attribute *ltc4151_attrs[] = {
        &sensor_dev_attr_in1_input.dev_attr.attr,
        &sensor_dev_attr_in2_input.dev_attr.attr,
 
@@ -167,54 +167,30 @@ static struct attribute *ltc4151_attributes[] = {
 
        NULL,
 };
-
-static const struct attribute_group ltc4151_group = {
-       .attrs = ltc4151_attributes,
-};
+ATTRIBUTE_GROUPS(ltc4151);
 
 static int ltc4151_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
        struct i2c_adapter *adapter = client->adapter;
+       struct device *dev = &client->dev;
        struct ltc4151_data *data;
-       int ret;
+       struct device *hwmon_dev;
 
        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                return -ENODEV;
 
-       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->update_lock);
 
-       /* Register sysfs hooks */
-       ret = sysfs_create_group(&client->dev.kobj, &ltc4151_group);
-       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 out_hwmon_device_register;
-       }
-
-       return 0;
-
-out_hwmon_device_register:
-       sysfs_remove_group(&client->dev.kobj, &ltc4151_group);
-       return ret;
-}
-
-static int ltc4151_remove(struct i2c_client *client)
-{
-       struct ltc4151_data *data = i2c_get_clientdata(client);
-
-       hwmon_device_unregister(data->hwmon_dev);
-       sysfs_remove_group(&client->dev.kobj, &ltc4151_group);
-
-       return 0;
+       hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+                                                          data,
+                                                          ltc4151_groups);
+       return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
 static const struct i2c_device_id ltc4151_id[] = {
@@ -229,7 +205,6 @@ static struct i2c_driver ltc4151_driver = {
                .name   = "ltc4151",
        },
        .probe          = ltc4151_probe,
-       .remove         = ltc4151_remove,
        .id_table       = ltc4151_id,
 };