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path: root/drivers/hwmon/lm83.c
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Diffstat (limited to 'drivers/hwmon/lm83.c')
-rw-r--r--drivers/hwmon/lm83.c204
1 files changed, 76 insertions, 128 deletions
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
index 8290476aee4..9e4d0e1d3c4 100644
--- a/drivers/hwmon/lm83.c
+++ b/drivers/hwmon/lm83.c
@@ -1,7 +1,7 @@
/*
* lm83.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de>
*
* Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is
* a sensor chip made by National Semiconductor. It reports up to four
@@ -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
*/
@@ -177,10 +170,15 @@ 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);
- long val = simple_strtol(buf, NULL, 10);
+ struct lm83_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ long val;
int nr = attr->index;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err < 0)
+ return err;
mutex_lock(&data->update_lock);
data->temp[nr] = TEMP_TO_REG(val);
@@ -335,17 +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 = kzalloc(sizeof(struct lm83_data), GFP_KERNEL);
- if (!data) {
- err = -ENOMEM;
- goto exit;
- }
+ data = devm_kzalloc(&new_client->dev, sizeof(struct lm83_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- i2c_set_clientdata(new_client, data);
- data->valid = 0;
+ data->client = new_client;
mutex_init(&data->update_lock);
/*
@@ -354,88 +350,40 @@ 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.
*/
-
- if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group)))
- goto exit_free;
-
- if (id->driver_data == lm83) {
- if ((err = sysfs_create_group(&new_client->dev.kobj,
- &lm83_group_opt)))
- 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);
-exit_free:
- kfree(data);
-exit:
- 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);
-
- kfree(data);
- 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;
- }
-
- mutex_unlock(&data->update_lock);
+/*
+ * Driver data (common to all clients)
+ */
- return data;
-}
+static const struct i2c_device_id lm83_id[] = {
+ { "lm83", lm83 },
+ { "lm82", lm82 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm83_id);
-static int __init sensors_lm83_init(void)
-{
- return i2c_add_driver(&lm83_driver);
-}
+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,
+};
-static void __exit sensors_lm83_exit(void)
-{
- i2c_del_driver(&lm83_driver);
-}
+module_i2c_driver(lm83_driver);
-MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("LM83 driver");
MODULE_LICENSE("GPL");
-
-module_init(sensors_lm83_init);
-module_exit(sensors_lm83_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:27:31 +0000