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authorHans Verkuil <hverkuil@xs4all.nl>2009-04-01 03:57:53 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-04-06 21:44:24 -0300
commite6574f2fbecdb8af807169d345c10131ae060a88 (patch)
tree9923d1065397b9796a476cac238bacbdf1d820d1 /Documentation
parent868f985c2fb85b5f32785bb55a349d180a30f3d3 (diff)
downloadop-kernel-dev-e6574f2fbecdb8af807169d345c10131ae060a88.zip
op-kernel-dev-e6574f2fbecdb8af807169d345c10131ae060a88.tar.gz
V4L/DVB (11373): v4l2-common: add explicit v4l2_device pointer as first arg to new_(probed)_subdev
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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/video4linux/v4l2-framework.txt8
1 files changed, 3 insertions, 5 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt
index c9ae70a..854808b 100644
--- a/Documentation/video4linux/v4l2-framework.txt
+++ b/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
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