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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2009-04-01 08:57:53 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil@xs4all.nl> | 2009-04-01 08:57:53 +0200 |
| commit | f0312f1d7b8dd5cde4035eef2a5b0fe7effdd838 (patch) | |
| tree | 3e4f7547293379c0876008a04da98af9ba4f47aa /linux/Documentation | |
| parent | 1784ea5527ed756f946958f45f74d1f15797c366 (diff) | |
| download | mediapointer-dvb-s2-f0312f1d7b8dd5cde4035eef2a5b0fe7effdd838.tar.gz mediapointer-dvb-s2-f0312f1d7b8dd5cde4035eef2a5b0fe7effdd838.tar.bz2 | |
v4l2-common: add explicit v4l2_device pointer as first arg to new_(probed)_subdev
From: Hans Verkuil <hverkuil@xs4all.nl>
The functions v4l2_i2c_new_subdev and v4l2_i2c_new_probed_subdev relied on
i2c_get_adapdata to return the v4l2_device. However, this is not always
possible on embedded platforms. So modify the API to pass the v4l2_device
pointer explicitly.
Priority: normal
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Diffstat (limited to 'linux/Documentation')
| -rw-r--r-- | linux/Documentation/video4linux/v4l2-framework.txt | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/linux/Documentation/video4linux/v4l2-framework.txt b/linux/Documentation/video4linux/v4l2-framework.txt index 2a7ffda49..39ea5dc3d 100644 --- a/linux/Documentation/video4linux/v4l2-framework.txt +++ b/linux/Documentation/video4linux/v4l2-framework.txt @@ -364,14 +364,12 @@ from the remove() callback ensures that this is always done correctly. The bridge driver also has some helper functions it can use: -struct v4l2_subdev *sd = v4l2_i2c_new_subdev(adapter, "module_foo", "chipid", 0x36); +struct v4l2_subdev *sd = v4l2_i2c_new_subdev(v4l2_dev, adapter, + "module_foo", "chipid", 0x36); This loads the given module (can be NULL if no module needs to be loaded) and calls i2c_new_device() with the given i2c_adapter and chip/address arguments. -If all goes well, then it registers the subdev with the v4l2_device. It gets -the v4l2_device by calling i2c_get_adapdata(adapter), so you should make sure -to call i2c_set_adapdata(adapter, v4l2_device) when you setup the i2c_adapter -in your driver. +If all goes well, then it registers the subdev with the v4l2_device. You can also use v4l2_i2c_new_probed_subdev() which is very similar to v4l2_i2c_new_subdev(), except that it has an array of possible I2C addresses |