linux-kernel - [PATCH 2/2] media: i2c: ths8200: add support v4l-async

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Date:	Mon,  3 Jun 2013 22:56:18 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Hans Verkuil <hans.verkuil@...co.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	LMML <linux-media@...r.kernel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>
Subject: [PATCH 2/2] media: i2c: ths8200: add support v4l-async

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

This patch supports ths8200 driver for v4l-async subdevice
probing.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
---
 drivers/media/i2c/ths8200.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/media/i2c/ths8200.c b/drivers/media/i2c/ths8200.c
index 9396829..d1bddcc 100644
--- a/drivers/media/i2c/ths8200.c
+++ b/drivers/media/i2c/ths8200.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/v4l2-dv-timings.h>
 
+#include <media/v4l2-async.h>
 #include <media/v4l2-device.h>
 
 #include "ths8200_regs.h"
@@ -504,6 +505,7 @@ static int ths8200_probe(struct i2c_client *client,
 {
 	struct ths8200_state *state;
 	struct v4l2_subdev *sd;
+	int error;
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -521,6 +523,11 @@ static int ths8200_probe(struct i2c_client *client,
 
 	ths8200_core_init(sd);
 
+	state->sd.dev = &client->dev;
+	error = v4l2_async_register_subdev(&state->sd);
+	if (error)
+		return error;
+
 	v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
 		  client->addr << 1, client->adapter->name);
 
@@ -530,12 +537,13 @@ static int ths8200_probe(struct i2c_client *client,
 static int ths8200_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ths8200_state *decoder = to_state(sd);
 
 	v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name,
 		 client->addr << 1, client->adapter->name);
 
 	ths8200_s_power(sd, false);
-
+	v4l2_async_unregister_subdev(&decoder->sd);
 	v4l2_device_unregister_subdev(sd);
 
 	return 0;
-- 
1.7.0.4

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