hwmon: (max6642) Convert to use devm_hwmon_device_register_with_groups

Also rename new_client variable to client and introduce
new variable dev pointing to client->dev in the probe function,
and use new macro ATTRIBUTE_GROUPS to declare attribute groups.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 24 insertions, 48 deletions

diff --git a/drivers/hwmon/max6642.c b/drivers/hwmon/max6642.c
index 57d58cd32206..3d61f8d719d5 100644
--- a/drivers/hwmon/max6642.c
+++ b/drivers/hwmon/max6642.c
@@ -87,7 +87,7 @@ static int temp_to_reg(int val)
  */
 
 struct max6642_data {
-        struct device *hwmon_dev;
+        struct i2c_client *client;
         struct mutex update_lock;
         bool valid; /* zero until following fields are valid */
         unsigned long last_updated; /* in jiffies */
@@ -102,10 +102,10 @@ struct max6642_data {
  * Real code
  */
 
-static void max6642_init_client(struct i2c_client *client)
+static void max6642_init_client(struct max6642_data *data,
+                                struct i2c_client *client)
 {
         u8 config;
-        struct max6642_data *data = i2c_get_clientdata(client);
 
         /*
          * Start the conversions.
@@ -168,14 +168,14 @@ static int max6642_detect(struct i2c_client *client,
 
 static struct max6642_data *max6642_update_device(struct device *dev)
 {
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6642_data *data = i2c_get_clientdata(client);
+        struct max6642_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         u16 val, tmp;
 
         mutex_lock(&data->update_lock);
 
         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
-                dev_dbg(&client->dev, "Updating max6642 data.\n");
+                dev_dbg(dev, "Updating max6642 data.\n");
                 val = i2c_smbus_read_byte_data(client,
                                         MAX6642_REG_R_LOCAL_TEMPL);
                 tmp = (val >> 6) & 3;
@@ -209,8 +209,8 @@ static struct max6642_data *max6642_update_device(struct device *dev)
 static ssize_t show_temp_max10(struct device *dev,
                                struct device_attribute *dev_attr, char *buf)
 {
-        struct max6642_data *data = max6642_update_device(dev);
         struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
+        struct max6642_data *data = max6642_update_device(dev);
 
         return sprintf(buf, "%d\n",
                        temp_from_reg10(data->temp_input[attr->index]));
@@ -219,8 +219,8 @@ static ssize_t show_temp_max10(struct device *dev,
 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
                              char *buf)
 {
-        struct max6642_data *data = max6642_update_device(dev);
         struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
+        struct max6642_data *data = max6642_update_device(dev);
 
         return sprintf(buf, "%d\n", temp_from_reg(data->temp_high[attr2->nr]));
 }
@@ -228,11 +228,10 @@ static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
                             const char *buf, size_t count)
 {
+        struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
+        struct max6642_data *data = dev_get_drvdata(dev);
         unsigned long val;
         int err;
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6642_data *data = i2c_get_clientdata(client);
-        struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
 
         err = kstrtoul(buf, 10, &val);
         if (err < 0)
@@ -240,7 +239,7 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 
         mutex_lock(&data->update_lock);
         data->temp_high[attr2->nr] = clamp_val(temp_to_reg(val), 0, 255);
-        i2c_smbus_write_byte_data(client, attr2->index,
+        i2c_smbus_write_byte_data(data->client, attr2->index,
                                   data->temp_high[attr2->nr]);
         mutex_unlock(&data->update_lock);
         return count;
@@ -264,7 +263,7 @@ static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 
-static struct attribute *max6642_attributes[] = {
+static struct attribute *max6642_attrs[] = {
         &sensor_dev_attr_temp1_input.dev_attr.attr,
         &sensor_dev_attr_temp2_input.dev_attr.attr,
         &sensor_dev_attr_temp1_max.dev_attr.attr,
@@ -275,52 +274,30 @@ static struct attribute *max6642_attributes[] = {
         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
         NULL
 };
+ATTRIBUTE_GROUPS(max6642);
 
-static const struct attribute_group max6642_group = {
-        .attrs = max6642_attributes,
-};
-
-static int max6642_probe(struct i2c_client *new_client,
+static int max6642_probe(struct i2c_client *client,
                          const struct i2c_device_id *id)
 {
+        struct device *dev = &client->dev;
         struct max6642_data *data;
-        int err;
+        struct device *hwmon_dev;
 
-        data = devm_kzalloc(&new_client->dev, sizeof(struct max6642_data),
-                            GFP_KERNEL);
+        data = devm_kzalloc(dev, sizeof(struct max6642_data), GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
-        i2c_set_clientdata(new_client, data);
+        data->client = client;
         mutex_init(&data->update_lock);
 
         /* Initialize the MAX6642 chip */
-        max6642_init_client(new_client);
-
-        /* Register sysfs hooks */
-        err = sysfs_create_group(&new_client->dev.kobj, &max6642_group);
-        if (err)
-                return err;
-
-        data->hwmon_dev = hwmon_device_register(&new_client->dev);
-        if (IS_ERR(data->hwmon_dev)) {
-                err = PTR_ERR(data->hwmon_dev);
-                goto exit_remove_files;
-        }
-
-        return 0;
-
-exit_remove_files:
-        sysfs_remove_group(&new_client->dev.kobj, &max6642_group);
-        return err;
-}
-
-static int max6642_remove(struct i2c_client *client)
-{
-        struct max6642_data *data = i2c_get_clientdata(client);
+        max6642_init_client(data, client);
 
-        hwmon_device_unregister(data->hwmon_dev);
-        sysfs_remove_group(&client->dev.kobj, &max6642_group);
+        hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
+                                                           client->name, data,
+                                                           max6642_groups);
+        if (IS_ERR(hwmon_dev))
+                return PTR_ERR(hwmon_dev);
 
         return 0;
 }
@@ -341,7 +318,6 @@ static struct i2c_driver max6642_driver = {
                 .name   = "max6642",
         },
         .probe          = max6642_probe,
-        .remove         = max6642_remove,
         .id_table       = max6642_id,
         .detect         = max6642_detect,
         .address_list   = normal_i2c,