[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/smsc47m1.c b/drivers/hwmon/smsc47m1.c
index 7166ad0b2fda..de7c7f804d66 100644
--- a/drivers/hwmon/smsc47m1.c
+++ b/drivers/hwmon/smsc47m1.c
@@ -31,6 +31,8 @@
 #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>
 
@@ -108,6 +110,7 @@ superio_exit(void)
 
 struct smsc47m1_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore lock;
 
         struct semaphore update_lock;
@@ -461,6 +464,13 @@ static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind)
            function. */
         smsc47m1_update_device(&new_client->dev, 1);
 
+        /* 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 error_detach;
+        }
+
         if (fan1) {
                 device_create_file(&new_client->dev, &dev_attr_fan1_input);
                 device_create_file(&new_client->dev, &dev_attr_fan1_min);
@@ -494,6 +504,8 @@ static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+error_detach:
+        i2c_detach_client(new_client);
 error_free:
         kfree(data);
 error_release:
@@ -503,8 +515,11 @@ error_release:
 
 static int smsc47m1_detach_client(struct i2c_client *client)
 {
+        struct smsc47m1_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");
@@ -512,7 +527,7 @@ static int smsc47m1_detach_client(struct i2c_client *client)
         }
 
         release_region(client->addr, SMSC_EXTENT);
-        kfree(i2c_get_clientdata(client));
+        kfree(data);
 
         return 0;
 }