[media] media: i2c: adv7343: add support for asynchronous probing

Both synchronous and asynchronous adv7343 subdevice probing is supported by
this patch.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/media/i2c/adv7343.c b/drivers/media/i2c/adv7343.c
index 7606218ec4a7..8080c2cf1029 100644
--- a/drivers/media/i2c/adv7343.c
+++ b/drivers/media/i2c/adv7343.c
@@ -27,6 +27,7 @@
 #include <linux/uaccess.h>
 
 #include <media/adv7343.h>
+#include <media/v4l2-async.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ctrls.h>
 
@@ -445,16 +446,21 @@ static int adv7343_probe(struct i2c_client *client,
                                        ADV7343_GAIN_DEF);
         state->sd.ctrl_handler = &state->hdl;
         if (state->hdl.error) {
-                int err = state->hdl.error;
-
-                v4l2_ctrl_handler_free(&state->hdl);
-                return err;
+                err = state->hdl.error;
+                goto done;
         }
         v4l2_ctrl_handler_setup(&state->hdl);
 
         err = adv7343_initialize(&state->sd);
         if (err)
+                goto done;
+
+        err = v4l2_async_register_subdev(&state->sd);
+
+done:
+        if (err < 0)
                 v4l2_ctrl_handler_free(&state->hdl);
+
         return err;
 }
 
@@ -463,6 +469,7 @@ static int adv7343_remove(struct i2c_client *client)
         struct v4l2_subdev *sd = i2c_get_clientdata(client);
         struct adv7343_state *state = to_state(sd);
 
+        v4l2_async_unregister_subdev(&state->sd);
         v4l2_device_unregister_subdev(sd);
         v4l2_ctrl_handler_free(&state->hdl);