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hwmon: (lm80) Convert to use devm_hwmon_device_register_with_groups

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Simplify code, reduce code size, and attach hwmon attributes to
hwmon device.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Guenter Roeck 2014-04-04 18:01:34 +02:00 committed by Jean Delvare
parent c669ec8039
commit 118c9a61f1
1 changed files with 22 additions and 48 deletions
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70
drivers/hwmon/lm80.c
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@ -112,7 +112,7 @@ static inline long TEMP_FROM_REG(u16 temp)
*/
struct lm80_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
char error; /* !=0 if error occurred during last update */
char valid; /* !=0 if following fields are valid */
@ -140,7 +140,6 @@ static int lm80_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
static void lm80_init_client(struct i2c_client *client);
static int lm80_remove(struct i2c_client *client);
static struct lm80_data *lm80_update_device(struct device *dev);
static int lm80_read_value(struct i2c_client *client, u8 reg);
static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
@ -162,7 +161,6 @@ static struct i2c_driver lm80_driver = {
.name = "lm80",
},
.probe = lm80_probe,
.remove = lm80_remove,
.id_table = lm80_id,
.detect = lm80_detect,
.address_list = normal_i2c,
@ -191,8 +189,8 @@ static ssize_t set_in_##suffix(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct i2c_client *client = to_i2c_client(dev); \
struct lm80_data *data = i2c_get_clientdata(client); \
struct lm80_data *data = dev_get_drvdata(dev); \
struct i2c_client *client = data->client; \
long val; \
int err = kstrtol(buf, 10, &val); \
if (err < 0) \
@ -235,8 +233,8 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int err = kstrtoul(buf, 10, &val);
if (err < 0)
@ -259,8 +257,8 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long min, val;
u8 reg;
int err = kstrtoul(buf, 10, &val);
@ -286,7 +284,7 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
data->fan_div[nr] = 3;
break;
default:
dev_err(&client->dev,
dev_err(dev,
"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
val);
mutex_unlock(&data->update_lock);
@ -332,8 +330,8 @@ show_temp(os_hyst, temp_os_hyst);
static ssize_t set_temp_##suffix(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm80_data *data = i2c_get_clientdata(client); \
struct lm80_data *data = dev_get_drvdata(dev); \
struct i2c_client *client = data->client; \
long val; \
int err = kstrtol(buf, 10, &val); \
if (err < 0) \
@ -440,7 +438,7 @@ static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
* Real code
*/
static struct attribute *lm80_attributes[] = {
static struct attribute *lm80_attrs[] = {
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
@ -487,10 +485,7 @@ static struct attribute *lm80_attributes[] = {
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group lm80_group = {
.attrs = lm80_attributes,
};
ATTRIBUTE_GROUPS(lm80);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
@ -541,14 +536,15 @@ static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
static int lm80_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct lm80_data *data;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct lm80_data), GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM80 chip */
@ -558,32 +554,10 @@ static int lm80_probe(struct i2c_client *client,
data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &lm80_group);
if (err)
return err;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, lm80_groups);
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error_remove;
}
return 0;
error_remove:
sysfs_remove_group(&client->dev.kobj, &lm80_group);
return err;
}
static int lm80_remove(struct i2c_client *client)
{
struct lm80_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm80_group);
return 0;
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static int lm80_read_value(struct i2c_client *client, u8 reg)
@ -614,8 +588,8 @@ static void lm80_init_client(struct i2c_client *client)
static struct lm80_data *lm80_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int i;
int rv;
int prev_rv;
@ -627,7 +601,7 @@ static struct lm80_data *lm80_update_device(struct device *dev)
lm80_init_client(client);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting lm80 update\n");
dev_dbg(dev, "Starting lm80 update\n");
for (i = 0; i <= 6; i++) {
rv = lm80_read_value(client, LM80_REG_IN(i));
if (rv < 0)