[media] V4L2: mt9m111: switch to asynchronous subdevice probing

Convert the mt9m111 driver to asynchronous subdevice probing. Synchronous
probing is also still possible.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/i2c/soc_camera/mt9m111.c b/drivers/media/i2c/soc_camera/mt9m111.c
index de3605d..6f40566 100644 (file)
--- a/drivers/media/i2c/soc_camera/mt9m111.c
+++ b/drivers/media/i2c/soc_camera/mt9m111.c
@@ -946,6 +946,10 @@ static int mt9m111_probe(struct i2c_client *client,
        if (!mt9m111)
                return -ENOMEM;
 
+       mt9m111->clk = v4l2_clk_get(&client->dev, "mclk");
+       if (IS_ERR(mt9m111->clk))
+               return -EPROBE_DEFER;
+
        /* Default HIGHPOWER context */
        mt9m111->ctx = &context_b;
 
@@ -963,8 +967,10 @@ static int mt9m111_probe(struct i2c_client *client,
                        &mt9m111_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
                        V4L2_EXPOSURE_AUTO);
        mt9m111->subdev.ctrl_handler = &mt9m111->hdl;
-       if (mt9m111->hdl.error)
-               return mt9m111->hdl.error;
+       if (mt9m111->hdl.error) {
+               ret = mt9m111->hdl.error;
+               goto out_clkput;
+       }
 
        /* Second stage probe - when a capture adapter is there */
        mt9m111->rect.left      = MT9M111_MIN_DARK_COLS;
@@ -975,18 +981,25 @@ static int mt9m111_probe(struct i2c_client *client,
        mt9m111->lastpage       = -1;
        mutex_init(&mt9m111->power_lock);
 
-       mt9m111->clk = v4l2_clk_get(&client->dev, "mclk");
-       if (IS_ERR(mt9m111->clk)) {
-               ret = PTR_ERR(mt9m111->clk);
-               goto eclkget;
-       }
+       ret = soc_camera_power_init(&client->dev, ssdd);
+       if (ret < 0)
+               goto out_hdlfree;
 
        ret = mt9m111_video_probe(client);
-       if (ret) {
-               v4l2_clk_put(mt9m111->clk);
-eclkget:
-               v4l2_ctrl_handler_free(&mt9m111->hdl);
-       }
+       if (ret < 0)
+               goto out_hdlfree;
+
+       mt9m111->subdev.dev = &client->dev;
+       ret = v4l2_async_register_subdev(&mt9m111->subdev);
+       if (ret < 0)
+               goto out_hdlfree;
+
+       return 0;
+
+out_hdlfree:
+       v4l2_ctrl_handler_free(&mt9m111->hdl);
+out_clkput:
+       v4l2_clk_put(mt9m111->clk);
 
        return ret;
 }
@@ -995,6 +1008,7 @@ static int mt9m111_remove(struct i2c_client *client)
 {
        struct mt9m111 *mt9m111 = to_mt9m111(client);
 
+       v4l2_async_unregister_subdev(&mt9m111->subdev);
        v4l2_clk_put(mt9m111->clk);
        v4l2_device_unregister_subdev(&mt9m111->subdev);
        v4l2_ctrl_handler_free(&mt9m111->hdl);