diff options
Diffstat (limited to 'drivers/hwmon/lm83.c')
| -rw-r--r-- | drivers/hwmon/lm83.c | 168 |
1 files changed, 63 insertions, 105 deletions
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c index be02155788c..9e4d0e1d3c4 100644 --- a/drivers/hwmon/lm83.c +++ b/drivers/hwmon/lm83.c @@ -25,10 +25,6 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> @@ -111,45 +107,12 @@ static const u8 LM83_REG_W_HIGH[] = { }; /* - * Functions declaration - */ - -static int lm83_detect(struct i2c_client *new_client, - struct i2c_board_info *info); -static int lm83_probe(struct i2c_client *client, - const struct i2c_device_id *id); -static int lm83_remove(struct i2c_client *client); -static struct lm83_data *lm83_update_device(struct device *dev); - -/* - * Driver data (common to all clients) - */ - -static const struct i2c_device_id lm83_id[] = { - { "lm83", lm83 }, - { "lm82", lm82 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, lm83_id); - -static struct i2c_driver lm83_driver = { - .class = I2C_CLASS_HWMON, - .driver = { - .name = "lm83", - }, - .probe = lm83_probe, - .remove = lm83_remove, - .id_table = lm83_id, - .detect = lm83_detect, - .address_list = normal_i2c, -}; - -/* * Client data (each client gets its own) */ struct lm83_data { - struct device *hwmon_dev; + struct i2c_client *client; + const struct attribute_group *groups[3]; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -161,6 +124,36 @@ struct lm83_data { u16 alarms; /* bitvector, combined */ }; +static struct lm83_data *lm83_update_device(struct device *dev) +{ + struct lm83_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { + int nr; + + dev_dbg(&client->dev, "Updating lm83 data.\n"); + for (nr = 0; nr < 9; nr++) { + data->temp[nr] = + i2c_smbus_read_byte_data(client, + LM83_REG_R_TEMP[nr]); + } + data->alarms = + i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1) + + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2) + << 8); + + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + /* * Sysfs stuff */ @@ -177,8 +170,8 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); - struct i2c_client *client = to_i2c_client(dev); - struct lm83_data *data = i2c_get_clientdata(client); + struct lm83_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; long val; int nr = attr->index; int err; @@ -340,15 +333,15 @@ static int lm83_detect(struct i2c_client *new_client, static int lm83_probe(struct i2c_client *new_client, const struct i2c_device_id *id) { + struct device *hwmon_dev; struct lm83_data *data; - int err; data = devm_kzalloc(&new_client->dev, sizeof(struct lm83_data), GFP_KERNEL); if (!data) return -ENOMEM; - i2c_set_clientdata(new_client, data); + data->client = new_client; mutex_init(&data->update_lock); /* @@ -357,72 +350,37 @@ static int lm83_probe(struct i2c_client *new_client, * at the same register as the LM83 temp3 entry - so we * declare 1 and 3 common, and then 2 and 4 only for the LM83. */ - - err = sysfs_create_group(&new_client->dev.kobj, &lm83_group); - if (err) - return err; - - if (id->driver_data == lm83) { - err = sysfs_create_group(&new_client->dev.kobj, - &lm83_group_opt); - if (err) - goto exit_remove_files; - } - - data->hwmon_dev = hwmon_device_register(&new_client->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - goto exit_remove_files; - } - - return 0; - -exit_remove_files: - sysfs_remove_group(&new_client->dev.kobj, &lm83_group); - sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt); - return err; -} - -static int lm83_remove(struct i2c_client *client) -{ - struct lm83_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &lm83_group); - sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); - - return 0; + data->groups[0] = &lm83_group; + if (id->driver_data == lm83) + data->groups[1] = &lm83_group_opt; + + hwmon_dev = devm_hwmon_device_register_with_groups(&new_client->dev, + new_client->name, + data, data->groups); + return PTR_ERR_OR_ZERO(hwmon_dev); } -static struct lm83_data *lm83_update_device(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct lm83_data *data = i2c_get_clientdata(client); - - mutex_lock(&data->update_lock); - - if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { - int nr; - - dev_dbg(&client->dev, "Updating lm83 data.\n"); - for (nr = 0; nr < 9; nr++) { - data->temp[nr] = - i2c_smbus_read_byte_data(client, - LM83_REG_R_TEMP[nr]); - } - data->alarms = - i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1) - + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2) - << 8); - - data->last_updated = jiffies; - data->valid = 1; - } +/* + * Driver data (common to all clients) + */ - mutex_unlock(&data->update_lock); +static const struct i2c_device_id lm83_id[] = { + { "lm83", lm83 }, + { "lm82", lm82 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm83_id); - return data; -} +static struct i2c_driver lm83_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm83", + }, + .probe = lm83_probe, + .id_table = lm83_id, + .detect = lm83_detect, + .address_list = normal_i2c, +}; module_i2c_driver(lm83_driver); |