[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, 16 insertions, 1 deletions

diff --git a/drivers/hwmon/adm9240.c b/drivers/hwmon/adm9240.c
index ce2a6eb93f6e..7ef61206ba10 100644
--- a/drivers/hwmon/adm9240.c
+++ b/drivers/hwmon/adm9240.c
@@ -47,6 +47,8 @@
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
 #include <linux/i2c-vid.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
 
 /* Addresses to scan */
 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
@@ -150,6 +152,7 @@ static struct i2c_driver adm9240_driver = {
 struct adm9240_data {
         enum chips type;
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore update_lock;
         char valid;
         unsigned long last_updated_measure;
@@ -582,6 +585,12 @@ static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
         adm9240_init_client(new_client);
 
         /* populate sysfs filesystem */
+        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_in0_input);
         device_create_file(&new_client->dev, &dev_attr_in0_min);
         device_create_file(&new_client->dev, &dev_attr_in0_max);
@@ -615,6 +624,9 @@ static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
         device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
 
         return 0;
+
+exit_detach:
+        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -630,15 +642,18 @@ static int adm9240_attach_adapter(struct i2c_adapter *adapter)
 
 static int adm9240_detach_client(struct i2c_client *client)
 {
+        struct adm9240_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");
                 return err;
         }
 
-        kfree(i2c_get_clientdata(client));
+        kfree(data);
         return 0;
 }