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path: root/drivers/hwmon/max1668.c
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Diffstat (limited to 'drivers/hwmon/max1668.c')
-rw-r--r--drivers/hwmon/max1668.c138
1 files changed, 48 insertions, 90 deletions
diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c
index 88953f99e91..e3ed0a5b6d9 100644
--- a/drivers/hwmon/max1668.c
+++ b/drivers/hwmon/max1668.c
@@ -1,23 +1,23 @@
/*
- Copyright (c) 2011 David George <david.george@ska.ac.za>
-
- based on adm1021.c
- some credit to Christoph Scheurer, but largely a rewrite
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- 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.
-*/
+ * Copyright (c) 2011 David George <david.george@ska.ac.za>
+ *
+ * based on adm1021.c
+ * some credit to Christoph Scheurer, but largely a rewrite
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * 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>
#include <linux/init.h>
@@ -66,7 +66,8 @@ MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
enum chips { max1668, max1805, max1989 };
struct max1668_data {
- struct device *hwmon_dev;
+ struct i2c_client *client;
+ const struct attribute_group *groups[3];
enum chips type;
struct mutex update_lock;
@@ -82,8 +83,8 @@ struct max1668_data {
static struct max1668_data *max1668_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct max1668_data *data = i2c_get_clientdata(client);
+ struct max1668_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
struct max1668_data *ret = data;
s32 val;
int i;
@@ -205,8 +206,8 @@ static ssize_t set_temp_max(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
- struct i2c_client *client = to_i2c_client(dev);
- struct max1668_data *data = i2c_get_clientdata(client);
+ struct max1668_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
long temp;
int ret;
@@ -215,11 +216,12 @@ static ssize_t set_temp_max(struct device *dev,
return ret;
mutex_lock(&data->update_lock);
- data->temp_max[index] = SENSORS_LIMIT(temp/1000, -128, 127);
- if (i2c_smbus_write_byte_data(client,
+ data->temp_max[index] = clamp_val(temp/1000, -128, 127);
+ ret = i2c_smbus_write_byte_data(client,
MAX1668_REG_LIMH_WR(index),
- data->temp_max[index]))
- count = -EIO;
+ data->temp_max[index]);
+ if (ret < 0)
+ count = ret;
mutex_unlock(&data->update_lock);
return count;
@@ -230,8 +232,8 @@ static ssize_t set_temp_min(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
- struct i2c_client *client = to_i2c_client(dev);
- struct max1668_data *data = i2c_get_clientdata(client);
+ struct max1668_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
long temp;
int ret;
@@ -240,11 +242,12 @@ static ssize_t set_temp_min(struct device *dev,
return ret;
mutex_lock(&data->update_lock);
- data->temp_min[index] = SENSORS_LIMIT(temp/1000, -128, 127);
- if (i2c_smbus_write_byte_data(client,
+ data->temp_min[index] = clamp_val(temp/1000, -128, 127);
+ ret = i2c_smbus_write_byte_data(client,
MAX1668_REG_LIML_WR(index),
- data->temp_max[index]))
- count = -EIO;
+ data->temp_min[index]);
+ if (ret < 0)
+ count = ret;
mutex_unlock(&data->update_lock);
return count;
@@ -405,62 +408,29 @@ static int max1668_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
+ struct device *hwmon_dev;
struct max1668_data *data;
- int err;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- data = kzalloc(sizeof(struct max1668_data), GFP_KERNEL);
+ data = devm_kzalloc(dev, sizeof(struct max1668_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
- i2c_set_clientdata(client, data);
+ data->client = client;
data->type = id->driver_data;
mutex_init(&data->update_lock);
- /* Register sysfs hooks */
- err = sysfs_create_group(&client->dev.kobj, &max1668_group_common);
- if (err)
- goto error_free;
-
- if (data->type == max1668 || data->type == max1989) {
- err = sysfs_create_group(&client->dev.kobj,
- &max1668_group_unique);
- if (err)
- goto error_sysrem0;
- }
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- goto error_sysrem1;
- }
-
- return 0;
-
-error_sysrem1:
+ /* sysfs hooks */
+ data->groups[0] = &max1668_group_common;
if (data->type == max1668 || data->type == max1989)
- sysfs_remove_group(&client->dev.kobj, &max1668_group_unique);
-error_sysrem0:
- sysfs_remove_group(&client->dev.kobj, &max1668_group_common);
-error_free:
- kfree(data);
- return err;
-}
-
-static int max1668_remove(struct i2c_client *client)
-{
- struct max1668_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- if (data->type == max1668 || data->type == max1989)
- sysfs_remove_group(&client->dev.kobj, &max1668_group_unique);
-
- sysfs_remove_group(&client->dev.kobj, &max1668_group_common);
+ data->groups[1] = &max1668_group_unique;
- kfree(data);
- return 0;
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+ data, data->groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id max1668_id[] = {
@@ -478,25 +448,13 @@ static struct i2c_driver max1668_driver = {
.name = "max1668",
},
.probe = max1668_probe,
- .remove = max1668_remove,
.id_table = max1668_id,
.detect = max1668_detect,
.address_list = max1668_addr_list,
};
-static int __init sensors_max1668_init(void)
-{
- return i2c_add_driver(&max1668_driver);
-}
-
-static void __exit sensors_max1668_exit(void)
-{
- i2c_del_driver(&max1668_driver);
-}
+module_i2c_driver(max1668_driver);
MODULE_AUTHOR("David George <david.george@ska.ac.za>");
MODULE_DESCRIPTION("MAX1668 remote temperature sensor driver");
MODULE_LICENSE("GPL");
-
-module_init(sensors_max1668_init)
-module_exit(sensors_max1668_exit)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 15:31:29 +0000