[linux-dvb] [Patch] Add links in sysfs to DVB adapter devices
Andrew de Quincey
adq_dvb at lidskialf.net
Thu Apr 6 21:01:29 CEST 2006
Hi, this is a patch which adds sysfs links back to the root adapter for DVB
Currently in /sys/class/dvb/dvbX.demuxY/ we have:
With the patch, we have (for a PCI DVB device):
device -> ../../../devices/pci0000:00/0000:00:1e.0/0000:03:0d.0
So userspace tools can (finally) work out which physical device a DVB adapter
refers to. Previously you had to kinda look through dmesg and hope that it
hadn't been dumped out of the buffer. This makes debugging a lot easier if
the system has been up for a long time!
This is done by adding an extra 'struct device *' parameter to
dvb_register_adapter(). It will work with any kind of standard
linux 'device'. Additionally, if someone has an embedded system which does
things differently, they can simply supply 'NULL' and the behaviour will be
as before - the link will simply not appear.
Since this affects the dvb-related files in the video4linux tree, I've sent it
to the video4linux list as well.
Patch attached - please comment.
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