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/ov9640.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/ov9640.c')
| -rw-r--r-- | drivers/media/i2c/soc_camera/ov9640.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/media/i2c/soc_camera/ov9640.c b/drivers/media/i2c/soc_camera/ov9640.c index 53156ef1ec0..b323684eaf7 100644 --- a/drivers/media/i2c/soc_camera/ov9640.c +++ b/drivers/media/i2c/soc_camera/ov9640.c @@ -592,7 +592,11 @@ static int ov9640_video_probe(struct i2c_client *client) struct ov9640_priv *priv = to_ov9640_sensor(sd); u8 pid, ver, midh, midl; const char *devname; - int ret = 0; + int ret; + + ret = ov9640_s_power(&priv->subdev, 1); + if (ret < 0) + return ret; /* * check and show product ID and manufacturer ID @@ -606,7 +610,7 @@ static int ov9640_video_probe(struct i2c_client *client) if (!ret) ret = ov9640_reg_read(client, OV9640_MIDL, &midl); if (ret) - return ret; + goto done; switch (VERSION(pid, ver)) { case OV9640_V2: @@ -621,13 +625,18 @@ static int ov9640_video_probe(struct i2c_client *client) break; default: dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver); - return -ENODEV; + ret = -ENODEV; + goto done; } dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n", devname, pid, ver, midh, midl); - return v4l2_ctrl_handler_setup(&priv->hdl); + ret = v4l2_ctrl_handler_setup(&priv->hdl); + +done: + ov9640_s_power(&priv->subdev, 0); + return ret; } static const struct v4l2_ctrl_ops ov9640_ctrl_ops = { |