[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/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index fdeeb3ab6f2f..96b9eb40f425 100644
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -32,6 +32,8 @@
 #include <linux/jiffies.h>
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
 #include <linux/init.h>
 #include <asm/io.h>
 
@@ -100,6 +102,7 @@ static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
 
 struct smsc47b397_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore lock;
 
         struct semaphore update_lock;
@@ -226,8 +229,11 @@ static int smsc47b397_attach_adapter(struct i2c_adapter *adapter)
 
 static int smsc47b397_detach_client(struct i2c_client *client)
 {
+        struct smsc47b397_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");
@@ -235,7 +241,7 @@ static int smsc47b397_detach_client(struct i2c_client *client)
         }
 
         release_region(client->addr, SMSC_EXTENT);
-        kfree(i2c_get_clientdata(client));
+        kfree(data);
 
         return 0;
 }
@@ -285,6 +291,12 @@ static int smsc47b397_detect(struct i2c_adapter *adapter, int addr, int kind)
         if ((err = i2c_attach_client(new_client)))
                 goto error_free;
 
+        data->class_dev = hwmon_device_register(&new_client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto error_detach;
+        }
+
         device_create_file_temp(new_client, 1);
         device_create_file_temp(new_client, 2);
         device_create_file_temp(new_client, 3);
@@ -297,6 +309,8 @@ static int smsc47b397_detect(struct i2c_adapter *adapter, int addr, int kind)
 
         return 0;
 
+error_detach:
+        i2c_detach_client(new_client);
 error_free:
         kfree(data);
 error_release: