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V4L/DVB (10136): v4l2 doc: update v4l2-framework.txt

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Mention the new v4l2_file_operations struct.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2008-12-23 13:42:25 -03:00 committed by Mauro Carvalho Chehab
parent bec43661b1
commit c7dd09dabc
1 changed files with 6 additions and 3 deletions
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9
Documentation/video4linux/v4l2-framework.txt
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@ -392,13 +392,16 @@ You should also set these fields:
- v4l2_dev: set to the v4l2_device parent device.
- name: set to something descriptive and unique.
- fops: set to the file_operations struct.
- fops: set to the v4l2_file_operations struct.
- ioctl_ops: if you use the v4l2_ioctl_ops to simplify ioctl maintenance
(highly recommended to use this and it might become compulsory in the
future!), then set this to your v4l2_ioctl_ops struct.
If you use v4l2_ioctl_ops, then you should set .unlocked_ioctl to
__video_ioctl2 or .ioctl to video_ioctl2 in your file_operations struct.
If you use v4l2_ioctl_ops, then you should set either .unlocked_ioctl or
.ioctl to video_ioctl2 in your v4l2_file_operations struct.
The v4l2_file_operations struct is a subset of file_operations. The main
difference is that the inode argument is omitted since it is never used.
video_device registration