summaryrefslogtreecommitdiff
path: root/Documentation/video4linux/v4l2-framework.txt
diff options
context:
space:
mode:
authorHans Verkuil <hverkuil@xs4all.nl>2009-09-06 14:13:14 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-09-19 07:19:27 +0400
commit22e221258b56cc1a4dc5a9fb2c26f4d6ed9dde81 (patch)
tree0e07015c3b78211491594f000b77aa8a7e48d8fc /Documentation/video4linux/v4l2-framework.txt
parent7ae0cd9bc793e16d8d68df3c17c601732cc1d3c7 (diff)
downloadlinux-22e221258b56cc1a4dc5a9fb2c26f4d6ed9dde81.tar.xz
V4L/DVB (12722): v4l2-dev: replace 'kernel number' by 'device node number'.
The term 'kernel number' is very vague, so replace it with the somewhat more descriptive term 'device node number'. In one place the local variable 'nr' was used to create the device node number of the new device name. This has been replaced with the vdev->num field to more clearly mark this as being the device node number and not the minor number. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/video4linux/v4l2-framework.txt')
-rw-r--r--Documentation/video4linux/v4l2-framework.txt8
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt
index cb6c7eb51472..38b3716d8643 100644
--- a/Documentation/video4linux/v4l2-framework.txt
+++ b/Documentation/video4linux/v4l2-framework.txt
@@ -486,14 +486,14 @@ VFL_TYPE_RADIO: radioX for radio tuners
VFL_TYPE_VTX: vtxX for teletext devices (deprecated, don't use)
The last argument gives you a certain amount of control over the device
-kernel number used (i.e. the X in videoX). Normally you will pass -1 to
+device node number used (i.e. the X in videoX). Normally you will pass -1 to
let the v4l2 framework pick the first free number. But if a driver creates
many devices, then it can be useful to have different video devices in
separate ranges. For example, video capture devices start at 0, video
output devices start at 16.
-So you can use the last argument to specify a minimum kernel number and
-the v4l2 framework will try to pick the first free number that is equal
+So you can use the last argument to specify a minimum device node number
+and the v4l2 framework will try to pick the first free number that is equal
or higher to what you passed. If that fails, then it will just pick the
first free number.
@@ -513,7 +513,7 @@ After the device was successfully registered, then you can use these fields:
- vfl_type: the device type passed to video_register_device.
- minor: the assigned device minor number.
-- num: the device kernel number (i.e. the X in videoX).
+- num: the device node number (i.e. the X in videoX).
- index: the device index number.
If the registration failed, then you need to call video_device_release()