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Commit f073b994 authored by Axel Lin's avatar Axel Lin Committed by Guenter Roeck
Browse files

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: default avatarAxel Lin <axel.lin@ingics.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent a7b30ea5

drivers/hwmon/ds620.c

+17 −43
Original line number Diff line number Diff line
@@ -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,

};