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hwmon: (lm77) Convert to use devm_hwmon_device_register_with_groups 

Use devm_hwmon_device_register_with_groups API to attach attributes
to hwmon device, simplify code, and reduce code size.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-04-12 09:25:25 -07:00
parent 48dbd6ff14
commit 5975dfbf40
1 changed files with 14 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/hwmon/lm77.c
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@ -62,7 +62,7 @@ static const u8 temp_regs[t_num_temp] = {
/* Each client has this additional data */
struct lm77_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
char valid;
unsigned long last_updated; /* In jiffies */
@ -111,8 +111,8 @@ static int lm77_write_value(struct i2c_client *client, u8 reg, u16 value)
static struct lm77_data *lm77_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
struct lm77_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int i;
mutex_lock(&data->update_lock);
@ -165,8 +165,8 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
struct lm77_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int nr = attr->index;
long val;
int err;
@ -190,8 +190,8 @@ static ssize_t set_temp_hyst(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
struct lm77_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int err;
@ -232,7 +232,7 @@ static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1);
static struct attribute *lm77_attributes[] = {
static struct attribute *lm77_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
@ -245,10 +245,7 @@ static struct attribute *lm77_attributes[] = {
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group lm77_group = {
.attrs = lm77_attributes,
};
ATTRIBUTE_GROUPS(lm77);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm77_detect(struct i2c_client *client, struct i2c_board_info *info)
@ -332,43 +329,22 @@ static void lm77_init_client(struct i2c_client *client)
static int lm77_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct lm77_data *data;
int err;
data = devm_kzalloc(dev, sizeof(struct lm77_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM77 chip */
lm77_init_client(client);
/* Register sysfs hooks */
err = sysfs_create_group(&dev->kobj, &lm77_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
sysfs_remove_group(&dev->kobj, &lm77_group);
return err;
}
static int lm77_remove(struct i2c_client *client)
{
struct lm77_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm77_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, lm77_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id lm77_id[] = {
@ -384,7 +360,6 @@ static struct i2c_driver lm77_driver = {
.name = "lm77",
},
.probe = lm77_probe,
.remove = lm77_remove,
.id_table = lm77_id,
.detect = lm77_detect,
.address_list = normal_i2c,