[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/lm63.c b/drivers/hwmon/lm63.c
index 7c6f9ea5a254..cba0a40ad667 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -44,6 +44,8 @@
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
 #include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
 
 /*
  * Addresses to scan
@@ -152,6 +154,7 @@ static struct i2c_driver lm63_driver = {
 
 struct lm63_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore update_lock;
         char valid; /* zero until following fields are valid */
         unsigned long last_updated; /* in jiffies */
@@ -437,6 +440,12 @@ static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
         lm63_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;
+        }
+
         if (data->config & 0x04) { /* tachometer enabled */
                 device_create_file(&new_client->dev,
                                    &sensor_dev_attr_fan1_input.dev_attr);
@@ -462,6 +471,8 @@ static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+exit_detach:
+        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -505,15 +516,18 @@ static void lm63_init_client(struct i2c_client *client)
 
 static int lm63_detach_client(struct i2c_client *client)
 {
+        struct lm63_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;
 }