hwmon: (tmp102) Convert to use hwmon_device_register_with_groups

Simplify code, reduce code size, and attach sysfs attributes to hwmon device.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 20 insertions, 26 deletions

diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c
index 5ea99a25fdfe..51719956cc03 100644
--- a/drivers/hwmon/tmp102.c
+++ b/drivers/hwmon/tmp102.c
@@ -51,6 +51,7 @@
 #define TMP102_THIGH_REG                0x03
 
 struct tmp102 {
+        struct i2c_client *client;
         struct device *hwmon_dev;
         struct thermal_zone_device *tz;
         struct mutex lock;
@@ -77,9 +78,10 @@ static const u8 tmp102_reg[] = {
         TMP102_THIGH_REG,
 };
 
-static struct tmp102 *tmp102_update_device(struct i2c_client *client)
+static struct tmp102 *tmp102_update_device(struct device *dev)
 {
-        struct tmp102 *tmp102 = i2c_get_clientdata(client);
+        struct tmp102 *tmp102 = dev_get_drvdata(dev);
+        struct i2c_client *client = tmp102->client;
 
         mutex_lock(&tmp102->lock);
         if (time_after(jiffies, tmp102->last_update + HZ / 3)) {
@@ -98,7 +100,7 @@ static struct tmp102 *tmp102_update_device(struct i2c_client *client)
 
 static int tmp102_read_temp(void *dev, long *temp)
 {
-        struct tmp102 *tmp102 = tmp102_update_device(to_i2c_client(dev));
+        struct tmp102 *tmp102 = tmp102_update_device(dev);
 
         *temp = tmp102->temp[0];
 
@@ -110,7 +112,7 @@ static ssize_t tmp102_show_temp(struct device *dev,
                                 char *buf)
 {
         struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
-        struct tmp102 *tmp102 = tmp102_update_device(to_i2c_client(dev));
+        struct tmp102 *tmp102 = tmp102_update_device(dev);
 
         return sprintf(buf, "%d\n", tmp102->temp[sda->index]);
 }
@@ -120,8 +122,8 @@ static ssize_t tmp102_set_temp(struct device *dev,
                                const char *buf, size_t count)
 {
         struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
-        struct i2c_client *client = to_i2c_client(dev);
-        struct tmp102 *tmp102 = i2c_get_clientdata(client);
+        struct tmp102 *tmp102 = dev_get_drvdata(dev);
+        struct i2c_client *client = tmp102->client;
         long val;
         int status;
 
@@ -145,16 +147,13 @@ static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, tmp102_show_temp,
 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp,
                           tmp102_set_temp, 2);
 
-static struct attribute *tmp102_attributes[] = {
+static struct attribute *tmp102_attrs[] = {
         &sensor_dev_attr_temp1_input.dev_attr.attr,
         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
         &sensor_dev_attr_temp1_max.dev_attr.attr,
         NULL
 };
-
-static const struct attribute_group tmp102_attr_group = {
-        .attrs = tmp102_attributes,
-};
+ATTRIBUTE_GROUPS(tmp102);
 
 #define TMP102_CONFIG  (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1)
 #define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL)
@@ -163,6 +162,7 @@ static int tmp102_probe(struct i2c_client *client,
                                   const struct i2c_device_id *id)
 {
         struct device *dev = &client->dev;
+        struct device *hwmon_dev;
         struct tmp102 *tmp102;
         int status;
 
@@ -178,6 +178,7 @@ static int tmp102_probe(struct i2c_client *client,
                 return -ENOMEM;
 
         i2c_set_clientdata(client, tmp102);
+        tmp102->client = client;
 
         status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
         if (status < 0) {
@@ -205,19 +206,15 @@ static int tmp102_probe(struct i2c_client *client,
         tmp102->last_update = jiffies - HZ;
         mutex_init(&tmp102->lock);
 
-        status = sysfs_create_group(&dev->kobj, &tmp102_attr_group);
-        if (status) {
-                dev_dbg(dev, "could not create sysfs files\n");
-                goto fail_restore_config;
-        }
-        tmp102->hwmon_dev = hwmon_device_register(dev);
-        if (IS_ERR(tmp102->hwmon_dev)) {
+        hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
+                                                      tmp102, tmp102_groups);
+        if (IS_ERR(hwmon_dev)) {
                 dev_dbg(dev, "unable to register hwmon device\n");
-                status = PTR_ERR(tmp102->hwmon_dev);
-                goto fail_remove_sysfs;
+                status = PTR_ERR(hwmon_dev);
+                goto fail_restore_config;
         }
-
-        tmp102->tz = thermal_zone_of_sensor_register(dev, 0, dev,
+        tmp102->hwmon_dev = hwmon_dev;
+        tmp102->tz = thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
                                                      tmp102_read_temp, NULL);
         if (IS_ERR(tmp102->tz))
                 tmp102->tz = NULL;
@@ -226,8 +223,6 @@ static int tmp102_probe(struct i2c_client *client,
 
         return 0;
 
-fail_remove_sysfs:
-        sysfs_remove_group(&dev->kobj, &tmp102_attr_group);
 fail_restore_config:
         i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
                                      tmp102->config_orig);
@@ -238,9 +233,8 @@ static int tmp102_remove(struct i2c_client *client)
 {
         struct tmp102 *tmp102 = i2c_get_clientdata(client);
 
-        thermal_zone_of_sensor_unregister(&client->dev, tmp102->tz);
+        thermal_zone_of_sensor_unregister(tmp102->hwmon_dev, tmp102->tz);
         hwmon_device_unregister(tmp102->hwmon_dev);
-        sysfs_remove_group(&client->dev.kobj, &tmp102_attr_group);
 
         /* Stop monitoring if device was stopped originally */
         if (tmp102->config_orig & TMP102_CONF_SD) {