[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, 15 insertions, 1 deletions

diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index cf7a2a7f54b5..570098e15366 100644
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.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 <asm/io.h>
 
 /* Addresses to scan */
@@ -134,6 +136,7 @@ static inline int VID_FROM_REG(u8 val)
    allocated. */
 struct lm78_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore lock;
         enum chips type;
 
@@ -602,6 +605,12 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
         }
 
         /* 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 ERROR3;
+        }
+
         device_create_file(&new_client->dev, &dev_attr_in0_input);
         device_create_file(&new_client->dev, &dev_attr_in0_min);
         device_create_file(&new_client->dev, &dev_attr_in0_max);
@@ -640,6 +649,8 @@ int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+ERROR3:
+        i2c_detach_client(new_client);
 ERROR2:
         kfree(data);
 ERROR1:
@@ -651,8 +662,11 @@ ERROR0:
 
 static int lm78_detach_client(struct i2c_client *client)
 {
+        struct lm78_data *data = i2c_get_clientdata(client);
         int err;
 
+        hwmon_device_unregister(data->class_dev);
+
         if ((err = i2c_detach_client(client))) {
                 dev_err(&client->dev,
                     "Client deregistration failed, client not detached.\n");
@@ -662,7 +676,7 @@ static int lm78_detach_client(struct i2c_client *client)
         if(i2c_is_isa_client(client))
                 release_region(client->addr, LM78_EXTENT);
 
-        kfree(i2c_get_clientdata(client));
+        kfree(data);
 
         return 0;
 }