diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2012-07-18 10:54:04 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 17:04:42 -0300 |
| commit | 4bbc6d52e61a8a9c19fcc859c4acab89cb8cd4e5 (patch) | |
| tree | 64ce43072ed8fa87bd8f5bc4d8fe5794a0373aef /drivers/media/i2c/soc_camera/ov6650.c | |
| parent | 4ec10bacd6bf08de39ebdba9e75060452cc313e0 (diff) | |
[media] soc-camera: Push probe-time power management to drivers
Several client drivers access the hardware at probe time, for instance
to read the probe chip ID. Such chips need to be powered up when being
probed.
soc-camera handles this by powering chips up in the soc-camera probe
implementation. However, this will break with non soc-camera hosts that
don't perform the same operations.
Fix the problem by pushing the power up/down from the soc-camera core
down to individual drivers on a needs basis.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/i2c/soc_camera/ov6650.c')
| -rw-r--r-- | drivers/media/i2c/soc_camera/ov6650.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/media/i2c/soc_camera/ov6650.c b/drivers/media/i2c/soc_camera/ov6650.c index 12d57a5dd81..65b031f333b 100644 --- a/drivers/media/i2c/soc_camera/ov6650.c +++ b/drivers/media/i2c/soc_camera/ov6650.c @@ -829,8 +829,13 @@ static int ov6650_prog_dflt(struct i2c_client *client) static int ov6650_video_probe(struct i2c_client *client) { + struct ov6650 *priv = to_ov6650(client); u8 pidh, pidl, midh, midl; - int ret = 0; + int ret; + + ret = ov6650_s_power(&priv->subdev, 1); + if (ret < 0) + return ret; /* * check and show product ID and manufacturer ID @@ -844,12 +849,13 @@ static int ov6650_video_probe(struct i2c_client *client) ret = ov6650_reg_read(client, REG_MIDL, &midl); if (ret) - return ret; + goto done; if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", pidh, pidl); - return -ENODEV; + ret = -ENODEV; + goto done; } dev_info(&client->dev, @@ -859,7 +865,11 @@ static int ov6650_video_probe(struct i2c_client *client) ret = ov6650_reset(client); if (!ret) ret = ov6650_prog_dflt(client); + if (!ret) + ret = v4l2_ctrl_handler_setup(&priv->hdl); +done: + ov6650_s_power(&priv->subdev, 0); return ret; } @@ -1019,9 +1029,6 @@ static int ov6650_probe(struct i2c_client *client, priv->colorspace = V4L2_COLORSPACE_JPEG; ret = ov6650_video_probe(client); - if (!ret) - ret = v4l2_ctrl_handler_setup(&priv->hdl); - if (ret) { v4l2_ctrl_handler_free(&priv->hdl); kfree(priv); |