[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, 2 deletions

diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index b98f44952997..15f30fdc75c6 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -31,7 +31,8 @@
 #include <linux/jiffies.h>
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
-
+#include <linux/hwmon.h>
+#include <linux/err.h>
 
 /* Addresses to scan */
 static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, I2C_CLIENT_END };
@@ -51,6 +52,7 @@ SENSORS_INSMOD_1(lm77);
 /* Each client has this additional data */
 struct lm77_data {
         struct i2c_client       client;
+        struct class_device *class_dev;
         struct semaphore        update_lock;
         char                    valid;
         unsigned long           last_updated;   /* In jiffies */
@@ -317,6 +319,12 @@ static int lm77_detect(struct i2c_adapter *adapter, int address, int kind)
         lm77_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_input);
         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
         device_create_file(&new_client->dev, &dev_attr_temp1_min);
@@ -327,6 +335,8 @@ static int lm77_detect(struct i2c_adapter *adapter, int address, int kind)
         device_create_file(&new_client->dev, &dev_attr_alarms);
         return 0;
 
+exit_detach:
+        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -335,8 +345,10 @@ exit:
 
 static int lm77_detach_client(struct i2c_client *client)
 {
+        struct lm77_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;
 }