[PATCH v2 1/2] media: i2c: tvp7002: add support for asynchronous probing

[Prabhakar Lad <prabhakar.csengg@gmail.com>]

From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>

Both synchronous and asynchronous tvp7002 subdevice probing
is supported by this patch.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
---
 drivers/media/i2c/tvp7002.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c
index 36ad565..b577548 100644
--- a/drivers/media/i2c/tvp7002.c
+++ b/drivers/media/i2c/tvp7002.c
@@ -31,6 +31,7 @@
 #include <linux/module.h>
 #include <linux/v4l2-dv-timings.h>
 #include <media/tvp7002.h>
+#include <media/v4l2-async.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-ctrls.h>
@@ -1040,6 +1041,10 @@ static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
 	}
 	v4l2_ctrl_handler_setup(&device->hdl);
 
+	error = v4l2_async_register_subdev(&device->sd);
+	if (error)
+		goto error;
+
 	return 0;
 
 error:
@@ -1064,6 +1069,7 @@ static int tvp7002_remove(struct i2c_client *c)
 
 	v4l2_dbg(1, debug, sd, "Removing tvp7002 adapter"
 				"on address 0x%x\n", c->addr);
+	v4l2_async_unregister_subdev(&device->sd);
 #if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&device->sd.entity);
 #endif
-- 
1.7.9.5