[PATCH] I2C hwmon: add hwmon sysfs class to drivers

This patch modifies sensors chip drivers to make use of the new
sysfs class "hwmon".

Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 79d7ebc9b14a..129c8f213331 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -24,6 +24,8 @@
 #include <linux/jiffies.h>
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
 #include "lm75.h"
 
 
@@ -46,6 +48,7 @@ SENSORS_INSMOD_1(lm75);
 /* Each client has this additional data */
 struct lm75_data {
         struct i2c_client       client;
+        struct class_device *class_dev;
         struct semaphore        update_lock;
         char                    valid;          /* !=0 if following fields are valid */
         unsigned long           last_updated;   /* In jiffies */
@@ -208,12 +211,20 @@ static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
         lm75_init_client(new_client);
         
         /* Register sysfs hooks */
+        data->class_dev = hwmon_device_register(&new_client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto exit_detach;
+        }
+
         device_create_file(&new_client->dev, &dev_attr_temp1_max);
         device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 
         return 0;
 
+exit_detach:
+        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -222,8 +233,10 @@ exit:
 
 static int lm75_detach_client(struct i2c_client *client)
 {
+        struct lm75_data *data = i2c_get_clientdata(client);
+        hwmon_device_unregister(data->class_dev);
         i2c_detach_client(client);
-        kfree(i2c_get_clientdata(client));
+        kfree(data);
         return 0;
 }