[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/lm87.c b/drivers/hwmon/lm87.c
index 1921ed1af182..7e14858c257b 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -59,6 +59,8 @@
 #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
@@ -175,6 +177,7 @@ static struct i2c_driver lm87_driver = {
 
 struct lm87_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 */
@@ -608,6 +611,12 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
         data->in_scale[7] = 1875;
 
         /* 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_in1_input);
         device_create_file(&new_client->dev, &dev_attr_in1_min);
         device_create_file(&new_client->dev, &dev_attr_in1_max);
@@ -673,6 +682,8 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+exit_detach:
+        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -719,15 +730,18 @@ static void lm87_init_client(struct i2c_client *client)
 
 static int lm87_detach_client(struct i2c_client *client)
 {
+        struct lm87_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;
 }