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hwmon: (ds620) 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>
This commit is contained in:
Axel Lin 2014-07-09 09:59:51 +08:00 committed by Guenter Roeck
parent a7b30ea500
commit f073b99427
1 changed files with 17 additions and 43 deletions
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60
drivers/hwmon/ds620.c
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@ -67,7 +67,7 @@ static const u8 DS620_REG_TEMP[3] = {
/* Each client has this additional data */
struct ds620_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@ -106,8 +106,8 @@ static void ds620_init_client(struct i2c_client *client)
static struct ds620_data *ds620_update_client(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds620_data *data = i2c_get_clientdata(client);
struct ds620_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct ds620_data *ret = data;
mutex_lock(&data->update_lock);
@ -158,8 +158,8 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
long val;
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct i2c_client *client = to_i2c_client(dev);
struct ds620_data *data = i2c_get_clientdata(client);
struct ds620_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
res = kstrtol(buf, 10, &val);
@ -181,13 +181,15 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct ds620_data *data = ds620_update_client(dev);
struct i2c_client *client = to_i2c_client(dev);
struct i2c_client *client;
u16 conf, new_conf;
int res;
if (IS_ERR(data))
return PTR_ERR(data);
client = data->client;
/* reset alarms if necessary */
res = i2c_smbus_read_word_swapped(client, DS620_REG_CONF);
if (res < 0)
@ -213,7 +215,7 @@ static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
DS620_REG_CONFIG_THF);
static struct attribute *ds620_attributes[] = {
static struct attribute *ds620_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
@ -222,55 +224,28 @@ static struct attribute *ds620_attributes[] = {
NULL
};
static const struct attribute_group ds620_group = {
.attrs = ds620_attributes,
};
ATTRIBUTE_GROUPS(ds620);
static int ds620_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct ds620_data *data;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct ds620_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct ds620_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the DS620 chip */
ds620_init_client(client);
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &ds620_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
dev_info(&client->dev, "temperature sensor found\n");
return 0;
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &ds620_group);
return err;
}
static int ds620_remove(struct i2c_client *client)
{
struct ds620_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ds620_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, ds620_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ds620_id[] = {
@ -287,7 +262,6 @@ static struct i2c_driver ds620_driver = {
.name = "ds620",
},
.probe = ds620_probe,
.remove = ds620_remove,
.id_table = ds620_id,
};