V4L/DVB (9940): bt832: remove this driver

[safe/jmp/linux-2.6] / include / media / v4l2-i2c-drv-legacy.h

diff --git a/include/media/v4l2-i2c-drv-legacy.h b/include/media/v4l2-i2c-drv-legacy.h
index c059b32..e65dd9d 100644 (file)
--- a/include/media/v4l2-i2c-drv-legacy.h
+++ b/include/media/v4l2-i2c-drv-legacy.h
@@ -21,19 +21,32 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+/* NOTE: the full version of this header is in the v4l-dvb repository
+ * and allows v4l i2c drivers to be compiled on older kernels as well.
+ * The version of this header as it appears in the kernel is a stripped
+ * version (without all the backwards compatibility stuff) and so it
+ * looks a bit odd.
+ *
+ * If you look at the full version then you will understand the reason
+ * for introducing this header since you really don't want to have all
+ * the tricky backwards compatibility code in each and every i2c driver.
+ */
+
 struct v4l2_i2c_driver_data {
        const char * const name;
        int driverid;
        int (*command)(struct i2c_client *client, unsigned int cmd, void *arg);
-       int (*probe)(struct i2c_client *client);
+       int (*probe)(struct i2c_client *client, const struct i2c_device_id *id);
        int (*remove)(struct i2c_client *client);
        int (*suspend)(struct i2c_client *client, pm_message_t state);
        int (*resume)(struct i2c_client *client);
+       int (*legacy_probe)(struct i2c_adapter *adapter);
        int legacy_class;
+       const struct i2c_device_id *id_table;
 };
 
 static struct v4l2_i2c_driver_data v4l2_i2c_data;
-static struct i2c_client_address_data addr_data;
+static const struct i2c_client_address_data addr_data;
 static struct i2c_driver v4l2_i2c_driver_legacy;
 static char v4l2_i2c_drv_name_legacy[32];
 
@@ -45,6 +58,11 @@ static int v4l2_i2c_drv_attach_legacy(struct i2c_adapter *adapter, int address,
 
 static int v4l2_i2c_drv_probe_legacy(struct i2c_adapter *adapter)
 {
+       if (v4l2_i2c_data.legacy_probe) {
+               if (v4l2_i2c_data.legacy_probe(adapter))
+                       return i2c_probe(adapter, &addr_data, v4l2_i2c_drv_attach_legacy);
+               return 0;
+       }
        if (adapter->class & v4l2_i2c_data.legacy_class)
                return i2c_probe(adapter, &addr_data, v4l2_i2c_drv_attach_legacy);
        return 0;
@@ -52,14 +70,15 @@ static int v4l2_i2c_drv_probe_legacy(struct i2c_adapter *adapter)
 
 static int v4l2_i2c_drv_detach_legacy(struct i2c_client *client)
 {
-       int err = i2c_detach_client(client);
+       int err;
 
-       if (err)
-               return err;
        if (v4l2_i2c_data.remove)
                v4l2_i2c_data.remove(client);
-       kfree(client);
 
+       err = i2c_detach_client(client);
+       if (err)
+               return err;
+       kfree(client);
        return 0;
 }
 
@@ -116,6 +135,7 @@ static int __init v4l2_i2c_drv_init(void)
        v4l2_i2c_driver.command = v4l2_i2c_data.command;
        v4l2_i2c_driver.probe = v4l2_i2c_data.probe;
        v4l2_i2c_driver.remove = v4l2_i2c_data.remove;
+       v4l2_i2c_driver.id_table = v4l2_i2c_data.id_table;
        err = i2c_add_driver(&v4l2_i2c_driver);
        if (err)
                i2c_del_driver(&v4l2_i2c_driver_legacy);