[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, 25 insertions, 6 deletions

diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
index 70d996d6fe0a..3ab7a2ddafba 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -41,6 +41,8 @@
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
 #include <linux/i2c-vid.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include "lm75.h"
@@ -183,6 +185,7 @@ static u8 DIV_TO_REG(long val)
    dynamically allocated, at the same time the client itself is allocated. */
 struct asb100_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore lock;
         enum chips type;
 
@@ -821,6 +824,12 @@ static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
         data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
 
         /* 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 ERROR3;
+        }
+
         device_create_file_in(new_client, 0);
         device_create_file_in(new_client, 1);
         device_create_file_in(new_client, 2);
@@ -847,6 +856,11 @@ static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+ERROR3:
+        i2c_detach_client(data->lm75[1]);
+        i2c_detach_client(data->lm75[0]);
+        kfree(data->lm75[1]);
+        kfree(data->lm75[0]);
 ERROR2:
         i2c_detach_client(new_client);
 ERROR1:
@@ -857,21 +871,26 @@ ERROR0:
 
 static int asb100_detach_client(struct i2c_client *client)
 {
+        struct asb100_data *data = i2c_get_clientdata(client);
         int err;
 
+        /* main client */
+        if (data)
+                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;
         }
 
-        if (i2c_get_clientdata(client)==NULL) {
-                /* subclients */
+        /* main client */
+        if (data)
+                kfree(data);
+
+        /* subclient */
+        else
                 kfree(client);
-        } else {
-                /* main client */
-                kfree(i2c_get_clientdata(client));
-        }
 
         return 0;
 }