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Commit 276dac80 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (tmp421) 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: default avatarJean Delvare <jdelvare@suse.de>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent ad9beea4

drivers/hwmon/tmp421.c

+15 −32
Original line number Diff line number Diff line
@@ -69,7 +69,7 @@ static const struct i2c_device_id tmp421_id[] = { 
MODULE_DEVICE_TABLE(i2c, tmp421_id);



struct tmp421_data {

	struct device *hwmon_dev;

	struct i2c_client *client;

	struct mutex update_lock;

	char valid;

	unsigned long last_updated;
@@ -99,8 +99,8 @@ static int temp_from_u16(u16 reg) 


static struct tmp421_data *tmp421_update_device(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct tmp421_data *data = i2c_get_clientdata(client);

	struct tmp421_data *data = dev_get_drvdata(dev);

	struct i2c_client *client = data->client;

	int i;



	mutex_lock(&data->update_lock);
@@ -198,6 +198,11 @@ static const struct attribute_group tmp421_group = { 
	.is_visible = tmp421_is_visible,

};



static const struct attribute_group *tmp421_groups[] = {

	&tmp421_group,

	NULL

};



static int tmp421_init_client(struct i2c_client *client)

{

	int config, config_orig;
@@ -264,47 +269,26 @@ static int tmp421_detect(struct i2c_client *client, 
static int tmp421_probe(struct i2c_client *client,

			const struct i2c_device_id *id)

{

	struct device *dev = &client->dev;

	struct device *hwmon_dev;

	struct tmp421_data *data;

	int err;



	data = devm_kzalloc(&client->dev, sizeof(struct tmp421_data),

			    GFP_KERNEL);

	data = devm_kzalloc(dev, sizeof(struct tmp421_data), GFP_KERNEL);

	if (!data)

		return -ENOMEM;



	i2c_set_clientdata(client, data);

	mutex_init(&data->update_lock);

	data->channels = id->driver_data;

	data->client = client;



	err = tmp421_init_client(client);

	if (err)

		return err;



	err = sysfs_create_group(&client->dev.kobj, &tmp421_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);

		data->hwmon_dev = NULL;

		goto exit_remove;

	}

	return 0;



exit_remove:

	sysfs_remove_group(&client->dev.kobj, &tmp421_group);

	return err;

}



static int tmp421_remove(struct i2c_client *client)

{

	struct tmp421_data *data = i2c_get_clientdata(client);



	hwmon_device_unregister(data->hwmon_dev);

	sysfs_remove_group(&client->dev.kobj, &tmp421_group);



	return 0;

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,

							   data, tmp421_groups);

	return PTR_ERR_OR_ZERO(hwmon_dev);

}



static struct i2c_driver tmp421_driver = {
@@ -313,7 +297,6 @@ static struct i2c_driver tmp421_driver = { 
		.name	= "tmp421",

	},

	.probe = tmp421_probe,

	.remove = tmp421_remove,

	.id_table = tmp421_id,

	.detect = tmp421_detect,

	.address_list = normal_i2c,