[PATCH] I2C: W83792D add hwmon class register 2/3

This patch adds registration of hwmon class. Tested with help of i2c-stub.

Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 27 insertions, 6 deletions

diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index fa43b6fd1212..05f9b92ad3e7 100644
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -42,7 +42,9 @@
 #include <linux/i2c.h>
 #include <linux/i2c-sensor.h>
 #include <linux/i2c-vid.h>
+#include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
 
 /* Addresses to scan */
 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
@@ -267,6 +269,7 @@ DIV_TO_REG(long val)
 
 struct w83792d_data {
         struct i2c_client client;
+        struct class_device *class_dev;
         struct semaphore lock;
         enum chips type;
 
@@ -1289,6 +1292,11 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
         }
 
         /* 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);
@@ -1361,6 +1369,15 @@ w83792d_detect(struct i2c_adapter *adapter, int address, int kind)
 
         return 0;
 
+ERROR3:
+        if (data->lm75[0] != NULL) {
+                i2c_detach_client(data->lm75[0]);
+                kfree(data->lm75[0]);
+        }
+        if (data->lm75[1] != NULL) {
+                i2c_detach_client(data->lm75[1]);
+                kfree(data->lm75[1]);
+        }
 ERROR2:
         i2c_detach_client(new_client);
 ERROR1:
@@ -1372,21 +1389,25 @@ ERROR0:
 static int
 w83792d_detach_client(struct i2c_client *client)
 {
+        struct w83792d_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;
 }