[yocto] adding a udev entry for a camera

[Edward Vidal]

hello,
I removed the bus
udevadm test --action=add /usr/src/kernel/sysfs
run_command: calling: test
adm_test: version 182
This program is for debugging only, it does not run any program,
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.

builtin_kmod_init: load module index
add_matching_files: unable to open '/var/run/udev/rules.d': No such file or
directory
parse_file: reading '/etc/udev/rules.d/10-c920.rules' as rules file
still no /dev/video0

cat /etc/udev/rules.d/10-c920.rules
SUBSYSTEM=="video4linux",  ATTRS{idvendor}=="0x046d",
ATTRS{idProduct}=="0x082d", NAME="video0", MODE:="0660", RUN="/bin/mknod
/dev/video0 c 81 0"
still no /dev/video0
The camera is working correctly on my fedora 18 x86_64.

Note:
* Before camera connected
** After camera connected
Linux sim4.swbell.net 3.9.2-200.fc18.x86_64 #1 SMP Mon May 13 13:59:47 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux

Module                  Size  Used by
**snd_usb_audio         145223  1
**snd_usbmidi_lib        24713  1 snd_usb_audio
**snd_rawmidi            29531  1 snd_usbmidi_lib

*snd_hwdep              17650  1 snd_hda_codec
**snd_hwdep              17650  2 snd_usb_audio,snd_hda_codec

*snd_seq_device         14136  1 snd_seq
**snd_seq_device         14136  2 snd_seq,snd_rawmidi

*snd                    79379  19
snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_hda_codec,snd_hda_intel,snd_seq_device
**snd                    79379  24
snd_hda_codec_realtek,snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device

*video                  18991  0
**video                  18991  0

This is the beagleboard
 lsmod
Module                  Size  Used by
nls_iso8859_1           3673  1
nls_cp437               5339  1
I am going to be checking the video is a module or built into the kernel of
the
 uname -a
Linux beagleboard 3.4.36-yocto-standard #1 Mon Oct 28 21:58:22 MDT 2013
armv7l GNU/Linux

Thanks


On Thu, Oct 31, 2013 at 10:23 AM, Khem Raj <raj.khem at gmail.com> wrote:

> On Thu, Oct 31, 2013 at 8:45 AM, Edward Vidal <vidal.develone at gmail.com>
> wrote:
> >
> > Do I add RUN+="/bin/mknod /dev/video0 c 81 0" see below new version of
> > 1--c920.rules
> > cat 10-c920.rules
> > SUBSYSTEM=="video4linux", BUS=="usb", ATTRS{idvendor}=="0x046d",
> > ATTRS{idProduct}=="0x082d", NAME="video0", MODE:="0660", RUN+="/bin/mknod
> > /dev/video0 c 81 0"
>
> get rid of BUS construct there
>
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