hwmon: (max6650) Convert to use devm_hwmon_device_register_with_groups

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

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 28 insertions, 49 deletions

diff --git a/drivers/hwmon/max6650.c b/drivers/hwmon/max6650.c
index 26b24f772f5c..badff94edef8 100644
--- a/drivers/hwmon/max6650.c
+++ b/drivers/hwmon/max6650.c
@@ -110,7 +110,8 @@ module_param(clock, int, S_IRUGO);
  */
 
 struct max6650_data {
-        struct device *hwmon_dev;
+        struct i2c_client *client;
+        const struct attribute_group *groups[3];
         struct mutex update_lock;
         int nr_fans;
         char valid; /* zero until following fields are valid */
@@ -134,9 +135,9 @@ static const u8 tach_reg[] = {
 
 static struct max6650_data *max6650_update_device(struct device *dev)
 {
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int i;
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6650_data *data = i2c_get_clientdata(client);
 
         mutex_lock(&data->update_lock);
 
@@ -254,8 +255,8 @@ static ssize_t get_target(struct device *dev, struct device_attribute *devattr,
 static ssize_t set_target(struct device *dev, struct device_attribute *devattr,
                          const char *buf, size_t count)
 {
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6650_data *data = i2c_get_clientdata(client);
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int kscale, ktach;
         unsigned long rpm;
         int err;
@@ -323,8 +324,8 @@ static ssize_t get_pwm(struct device *dev, struct device_attribute *devattr,
 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
                         const char *buf, size_t count)
 {
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6650_data *data = i2c_get_clientdata(client);
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         unsigned long pwm;
         int err;
 
@@ -369,8 +370,8 @@ static ssize_t get_enable(struct device *dev, struct device_attribute *devattr,
 static ssize_t set_enable(struct device *dev, struct device_attribute *devattr,
                           const char *buf, size_t count)
 {
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6650_data *data = i2c_get_clientdata(client);
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         int max6650_modes[3] = {0, 3, 2};
         unsigned long mode;
         int err;
@@ -419,8 +420,8 @@ static ssize_t get_div(struct device *dev, struct device_attribute *devattr,
 static ssize_t set_div(struct device *dev, struct device_attribute *devattr,
                        const char *buf, size_t count)
 {
-        struct i2c_client *client = to_i2c_client(dev);
-        struct max6650_data *data = i2c_get_clientdata(client);
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         unsigned long div;
         int err;
 
@@ -465,7 +466,7 @@ static ssize_t get_alarm(struct device *dev, struct device_attribute *devattr,
 {
         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
         struct max6650_data *data = max6650_update_device(dev);
-        struct i2c_client *client = to_i2c_client(dev);
+        struct i2c_client *client = data->client;
         int alarm = 0;
 
         if (data->alarm & attr->index) {
@@ -503,7 +504,8 @@ static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
                                     int n)
 {
         struct device *dev = container_of(kobj, struct device, kobj);
-        struct i2c_client *client = to_i2c_client(dev);
+        struct max6650_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
         u8 alarm_en = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN);
         struct device_attribute *devattr;
 
@@ -538,7 +540,7 @@ static struct attribute *max6650_attrs[] = {
         NULL
 };
 
-static struct attribute_group max6650_attr_grp = {
+static const struct attribute_group max6650_group = {
         .attrs = max6650_attrs,
         .is_visible = max6650_attrs_visible,
 };
@@ -550,7 +552,7 @@ static struct attribute *max6651_attrs[] = {
         NULL
 };
 
-static const struct attribute_group max6651_attr_grp = {
+static const struct attribute_group max6651_group = {
         .attrs = max6651_attrs,
 };
 
@@ -558,9 +560,9 @@ static const struct attribute_group max6651_attr_grp = {
  * Real code
  */
 
-static int max6650_init_client(struct i2c_client *client)
+static int max6650_init_client(struct max6650_data *data,
+                               struct i2c_client *client)
 {
-        struct max6650_data *data = i2c_get_clientdata(client);
         int config;
         int err = -EIO;
 
@@ -649,6 +651,7 @@ static int max6650_probe(struct i2c_client *client,
                          const struct i2c_device_id *id)
 {
         struct max6650_data *data;
+        struct device *hwmon_dev;
         int err;
 
         data = devm_kzalloc(&client->dev, sizeof(struct max6650_data),
@@ -658,49 +661,26 @@ static int max6650_probe(struct i2c_client *client,
                 return -ENOMEM;
         }
 
-        i2c_set_clientdata(client, data);
+        data->client = client;
         mutex_init(&data->update_lock);
         data->nr_fans = id->driver_data;
 
         /*
          * Initialize the max6650 chip
          */
-        err = max6650_init_client(client);
+        err = max6650_init_client(data, client);
         if (err)
                 return err;
 
-        err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
-        if (err)
-                return err;
+        data->groups[0] = &max6650_group;
         /* 3 additional fan inputs for the MAX6651 */
-        if (data->nr_fans == 4) {
-                err = sysfs_create_group(&client->dev.kobj, &max6651_attr_grp);
-                if (err)
-                        goto err_remove;
-        }
-
-        data->hwmon_dev = hwmon_device_register(&client->dev);
-        if (!IS_ERR(data->hwmon_dev))
-                return 0;
-
-        err = PTR_ERR(data->hwmon_dev);
-        dev_err(&client->dev, "error registering hwmon device.\n");
         if (data->nr_fans == 4)
-                sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
-err_remove:
-        sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
-        return err;
-}
-
-static int max6650_remove(struct i2c_client *client)
-{
-        struct max6650_data *data = i2c_get_clientdata(client);
+                data->groups[1] = &max6651_group;
 
-        hwmon_device_unregister(data->hwmon_dev);
-        if (data->nr_fans == 4)
-                sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
-        sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
-        return 0;
+        hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
+                                                           client->name, data,
+                                                           data->groups);
+        return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
 static const struct i2c_device_id max6650_id[] = {
@@ -715,7 +695,6 @@ static struct i2c_driver max6650_driver = {
                 .name   = "max6650",
         },
         .probe          = max6650_probe,
-        .remove         = max6650_remove,
         .id_table       = max6650_id,
 };