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

From: Prabhakar Lad
Date: Sat Jun 22 2013 - 06:08:15 EST


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

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

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Hans Verkuil <hverkuil@xxxxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---
drivers/media/i2c/adv7343.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/adv7343.c b/drivers/media/i2c/adv7343.c
index 7606218..8080c2c 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);

--
1.7.9.5

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