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hwmon: (ads7828) Convert to devm_hwmon_device_register_with_groups

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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 2014-06-17 15:38:23 +08:00 committed by Guenter Roeck
parent 11f7e494fd
commit f82b2c3449
1 changed files with 14 additions and 38 deletions
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52
drivers/hwmon/ads7828.c
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@ -50,7 +50,7 @@ enum ads7828_chips { ads7828, ads7830 };
/* Client specific data */
struct ads7828_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock; /* Mutex protecting updates */
unsigned long last_updated; /* Last updated time (in jiffies) */
u16 adc_input[ADS7828_NCH]; /* ADS7828_NCH samples */
@ -72,8 +72,8 @@ static inline u8 ads7828_cmd_byte(u8 cmd, int ch)
/* Update data for the device (all 8 channels) */
static struct ads7828_data *ads7828_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ads7828_data *data = i2c_get_clientdata(client);
struct ads7828_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
@ -116,7 +116,7 @@ static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, ads7828_show_in, NULL, 5);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, ads7828_show_in, NULL, 6);
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, ads7828_show_in, NULL, 7);
static struct attribute *ads7828_attributes[] = {
static struct attribute *ads7828_attrs[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
@ -128,29 +128,17 @@ static struct attribute *ads7828_attributes[] = {
NULL
};
static const struct attribute_group ads7828_group = {
.attrs = ads7828_attributes,
};
static int ads7828_remove(struct i2c_client *client)
{
struct ads7828_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ads7828_group);
return 0;
}
ATTRIBUTE_GROUPS(ads7828);
static int ads7828_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ads7828_platform_data *pdata = dev_get_platdata(&client->dev);
struct device *dev = &client->dev;
struct ads7828_platform_data *pdata = dev_get_platdata(dev);
struct ads7828_data *data;
int err;
struct device *hwmon_dev;
data = devm_kzalloc(&client->dev, sizeof(struct ads7828_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct ads7828_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@ -182,24 +170,13 @@ static int ads7828_probe(struct i2c_client *client,
if (!data->diff_input)
data->cmd_byte |= ADS7828_CMD_SD_SE;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
err = sysfs_create_group(&client->dev.kobj, &ads7828_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 error;
}
return 0;
error:
sysfs_remove_group(&client->dev.kobj, &ads7828_group);
return err;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
ads7828_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ads7828_device_ids[] = {
@ -216,7 +193,6 @@ static struct i2c_driver ads7828_driver = {
.id_table = ads7828_device_ids,
.probe = ads7828_probe,
.remove = ads7828_remove,
};
module_i2c_driver(ads7828_driver);