hwmon: (adm1021) Do not create min sysfs attributes for LM84

LM84 does not support minimum temperature registers.
Only create the respective sysfs attributes for other chips.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 25 insertions, 7 deletions

diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index f920619cd6da..29dd9f746dfa 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -284,15 +284,11 @@ static DEVICE_ATTR(low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power);
 
 static struct attribute *adm1021_attributes[] = {
         &sensor_dev_attr_temp1_max.dev_attr.attr,
-        &sensor_dev_attr_temp1_min.dev_attr.attr,
         &sensor_dev_attr_temp1_input.dev_attr.attr,
         &sensor_dev_attr_temp2_max.dev_attr.attr,
-        &sensor_dev_attr_temp2_min.dev_attr.attr,
         &sensor_dev_attr_temp2_input.dev_attr.attr,
         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
-        &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
-        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
         &sensor_dev_attr_temp2_fault.dev_attr.attr,
         &dev_attr_alarms.attr,
         &dev_attr_low_power.attr,
@@ -303,6 +299,18 @@ static const struct attribute_group adm1021_group = {
         .attrs = adm1021_attributes,
 };
 
+static struct attribute *adm1021_min_attributes[] = {
+        &sensor_dev_attr_temp1_min.dev_attr.attr,
+        &sensor_dev_attr_temp2_min.dev_attr.attr,
+        &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+        NULL
+};
+
+static const struct attribute_group adm1021_min_group = {
+        .attrs = adm1021_min_attributes,
+};
+
 /* Return 0 if detection is successful, -ENODEV otherwise */
 static int adm1021_detect(struct i2c_client *client,
                           struct i2c_board_info *info)
@@ -425,6 +433,12 @@ static int adm1021_probe(struct i2c_client *client,
         if (err)
                 return err;
 
+        if (data->type != lm84) {
+                err = sysfs_create_group(&client->dev.kobj, &adm1021_min_group);
+                if (err)
+                        goto error;
+        }
+
         data->hwmon_dev = hwmon_device_register(&client->dev);
         if (IS_ERR(data->hwmon_dev)) {
                 err = PTR_ERR(data->hwmon_dev);
@@ -434,6 +448,7 @@ static int adm1021_probe(struct i2c_client *client,
         return 0;
 
 error:
+        sysfs_remove_group(&client->dev.kobj, &adm1021_min_group);
         sysfs_remove_group(&client->dev.kobj, &adm1021_group);
         return err;
 }
@@ -452,6 +467,7 @@ static int adm1021_remove(struct i2c_client *client)
         struct adm1021_data *data = i2c_get_clientdata(client);
 
         hwmon_device_unregister(data->hwmon_dev);
+        sysfs_remove_group(&client->dev.kobj, &adm1021_min_group);
         sysfs_remove_group(&client->dev.kobj, &adm1021_group);
 
         return 0;
@@ -477,9 +493,11 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
                         data->temp_max[i] = 1000 *
                                 (s8) i2c_smbus_read_byte_data(
                                         client, ADM1021_REG_TOS_R(i));
-                        data->temp_min[i] = 1000 *
-                                (s8) i2c_smbus_read_byte_data(
-                                        client, ADM1021_REG_THYST_R(i));
+                        if (data->type != lm84) {
+                                data->temp_min[i] = 1000 *
+                                  (s8) i2c_smbus_read_byte_data(client,
+                                                        ADM1021_REG_THYST_R(i));
+                        }
                 }
                 data->alarms = i2c_smbus_read_byte_data(client,
                                                 ADM1021_REG_STATUS) & 0x7c;