Hello,
in a quest to get static name for our devices, I started with following
rule:
SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", ATTRS{manufacturer}=="IKDA", \
SYMLINK="%s{product}_%s{serial}"
This produces links like
lrwxrwxrwx 1 root root 7 8. Nov 17:07 FTDIJTAG_0002 -> ttyUSB1
However when the connected device has more interfaces, this doesn't work
out for interfaces other then the last.
I tried
SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", ATTRS{manufacturer}=="IKDA", \
SYMLINK="%s{product}_%s{serial}_%s{bInterfaceNumver}"
but that only produces a link like:
lrwxrwxrwx 1 root root 7 8. Nov 17:09 FTDIJTAG_0002_
Digging deeper with
udevadm info -a -p `udevadm info -q path -n /dev/ttyUSB2`
I find ATTRS{bInterfaceNumber}=="01" on the second level of parents
while ATTRS{manufacturer}=="IKDA" is on the third level. The Udevadm info
says:
> A rule to match, can be composed by the attributes of the device
> and the attributes from one single parent device.
So this probably breaks the "one single parent device" rule.
Is my wish flawed? Udev? Any way to get around?
B.t.w. the devices in question are FTDI ftdi_sio devices with the default
VID/PID but custom manufacturer/product and unique serial.
Thanks
--
Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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