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hwmon: (ad7414) 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 2014-07-01 22:31:44 +08:00 committed by Guenter Roeck
parent ed67f0872b
commit 045c1391ec
1 changed files with 16 additions and 41 deletions
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57
drivers/hwmon/ad7414.c
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@ -39,7 +39,7 @@
static u8 AD7414_REG_LIMIT[] = { AD7414_REG_T_HIGH, AD7414_REG_T_LOW };
struct ad7414_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex lock; /* atomic read data updates */
char valid; /* !=0 if following fields are valid */
unsigned long next_update; /* In jiffies */
@ -72,8 +72,8 @@ static inline int ad7414_write(struct i2c_client *client, u8 reg, u8 value)
static struct ad7414_data *ad7414_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ad7414_data *data = i2c_get_clientdata(client);
struct ad7414_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->lock);
@ -127,8 +127,8 @@ static ssize_t set_max_min(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct ad7414_data *data = i2c_get_clientdata(client);
struct ad7414_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int index = to_sensor_dev_attr(attr)->index;
u8 reg = AD7414_REG_LIMIT[index];
long temp;
@ -164,7 +164,7 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 4);
static struct attribute *ad7414_attributes[] = {
static struct attribute *ad7414_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
@ -173,27 +173,25 @@ static struct attribute *ad7414_attributes[] = {
NULL
};
static const struct attribute_group ad7414_group = {
.attrs = ad7414_attributes,
};
ATTRIBUTE_GROUPS(ad7414);
static int ad7414_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
struct device *dev = &client->dev;
struct ad7414_data *data;
struct device *hwmon_dev;
int conf;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_READ_WORD_DATA))
return -EOPNOTSUPP;
data = devm_kzalloc(&client->dev, sizeof(struct ad7414_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct ad7414_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->lock);
dev_info(&client->dev, "chip found\n");
@ -201,38 +199,16 @@ static int ad7414_probe(struct i2c_client *client,
/* Make sure the chip is powered up. */
conf = i2c_smbus_read_byte_data(client, AD7414_REG_CONF);
if (conf < 0)
dev_warn(&client->dev,
"ad7414_probe unable to read config register.\n");
dev_warn(dev, "ad7414_probe unable to read config register.\n");
else {
conf &= ~(1 << 7);
i2c_smbus_write_byte_data(client, AD7414_REG_CONF, conf);
}
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &ad7414_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;
}
return 0;
exit_remove:
sysfs_remove_group(&client->dev.kobj, &ad7414_group);
return err;
}
static int ad7414_remove(struct i2c_client *client)
{
struct ad7414_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ad7414_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
client->name,
data, ad7414_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ad7414_id[] = {
@ -246,7 +222,6 @@ static struct i2c_driver ad7414_driver = {
.name = "ad7414",
},
.probe = ad7414_probe,
.remove = ad7414_remove,
.id_table = ad7414_id,
};