hwmon: Allow writing of negative trigger temperatures

- replace differing temperature variable types by long
- use strtol() instead of strtoul() for conversion

Signed-off-by: Christian Hohnstaedt <chohnstaedt@innominate.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index 1212d6b7f316..5a861f936120 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -151,7 +151,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
         struct i2c_client *client = to_i2c_client(dev);
         struct ds1621_data *data = ds1621_update_client(dev);
-        u16 val = LM75_TEMP_TO_REG(simple_strtoul(buf, NULL, 10));
+        u16 val = LM75_TEMP_TO_REG(simple_strtol(buf, NULL, 10));
 
         mutex_lock(&data->update_lock);
         data->temp[attr->index] = val;