mdev problem with BB 1.4.2
Mike Cashwell
mike.cashwell at sdrcinc.net
Wed Apr 18 15:39:11 UTC 2007
Greetings all,
I'm bringing up a completely new toolchain (gcc 4.1.1; glibc 2.5;
linux 2.6.20.4; BB 1.4.2) on an ARM v4tle board. (Whew!)
I'm having trouble getting mdev to fully populate /dev. Specifically,
I'm not getting entries for my 3 physical serial ports. I've scoured
the mailing list archives and found a few near-misses, but nothing
specific.
My hunch is that my sysfs is putting in symlinks in such a way that
mdev is having trouble. I've included what I think is the relevant
info below.
Anyone have any ideas? Maybe there's some BB config setting I don't
have set? My confusion is why mdev is getting the block devices right
but not the character ones.
Thanks for any assistance!
-Mike
------ /dev and /sys info -----
dm17:/dev $ ls -la
drwxrwxrwt 4 root root 640 Jan 1 00:01 .
drwxrwxr-x 15 500 500 4096 Apr 18 2007 ..
crw------- 1 root root 5, 1 Jan 1 04:58 console
srw-rw-rw- 1 root root 0 Jan 1 00:01 log
brw-rw---- 1 root root 7, 0 Jan 1 00:01 loop0
brw-rw---- 1 root root 7, 1 Jan 1 00:01 loop1
brw-rw---- 1 root root 7, 2 Jan 1 00:01 loop2
brw-rw---- 1 root root 7, 3 Jan 1 00:01 loop3
brw-rw---- 1 root root 7, 4 Jan 1 00:01 loop4
brw-rw---- 1 root root 7, 5 Jan 1 00:01 loop5
brw-rw---- 1 root root 7, 6 Jan 1 00:01 loop6
brw-rw---- 1 root root 7, 7 Jan 1 00:01 loop7
crw-r--r-- 1 root root 1, 3 Jan 1 00:00 null
drwxr-xr-x 2 root root 40 Jan 1 00:00 pts
brw-rw---- 1 root root 1, 0 Jan 1 00:01 ram0
brw-rw---- 1 root root 1, 1 Jan 1 00:01 ram1
brw-rw---- 1 root root 1, 10 Jan 1 00:01 ram10
brw-rw---- 1 root root 1, 11 Jan 1 00:01 ram11
brw-rw---- 1 root root 1, 12 Jan 1 00:01 ram12
brw-rw---- 1 root root 1, 13 Jan 1 00:01 ram13
brw-rw---- 1 root root 1, 14 Jan 1 00:01 ram14
brw-rw---- 1 root root 1, 15 Jan 1 00:01 ram15
brw-rw---- 1 root root 1, 2 Jan 1 00:01 ram2
brw-rw---- 1 root root 1, 3 Jan 1 00:01 ram3
brw-rw---- 1 root root 1, 4 Jan 1 00:01 ram4
brw-rw---- 1 root root 1, 5 Jan 1 00:01 ram5
brw-rw---- 1 root root 1, 6 Jan 1 00:01 ram6
brw-rw---- 1 root root 1, 7 Jan 1 00:01 ram7
brw-rw---- 1 root root 1, 8 Jan 1 00:01 ram8
brw-rw---- 1 root root 1, 9 Jan 1 00:01 ram9
crw-rw---- 1 root root 254, 0 Jan 1 00:01 rtc0
drwxr-xr-x 2 root root 40 Jan 1 00:00 shm
dm17:/dev $ cd /sys
dm17:/sys $ ls
block class firmware kernel power
bus devices fs module
dm17:/sys $ cd class/
dm17:/sys/class $ ls -la
drwxr-xr-x 9 root root 0 Jan 1 1970 .
drwxr-xr-x 11 root root 0 Jan 1 1970 ..
drwxr-xr-x 2 root root 0 Jan 1 00:01 mem
drwxr-xr-x 2 root root 0 Jan 1 00:01 misc
drwxr-xr-x 2 root root 0 Jan 1 1970 mtd
drwxr-xr-x 4 root root 0 Jan 1 1970 net
drwxr-xr-x 3 root root 0 Jan 1 1970 rtc
drwxr-xr-x 3 root root 0 Jan 1 1970 rtc-dev
drwxr-xr-x 2 root root 0 Jan 1 00:01 tty
dm17:/sys/class $ cd tty/
dm17:/sys/class/tty $ ls -la
drwxr-xr-x 2 root root 0 Jan 1 00:01 .
drwxr-xr-x 9 root root 0 Jan 1 1970 ..
lrwxrwxrwx 1 root root 0 Jan 1 00:01 console -
> ../../devices/virtual/tty/console
lrwxrwxrwx 1 root root 0 Jan 1 00:01 ptmx -> ../../
devices/virtual/tty/ptmx
lrwxrwxrwx 1 root root 0 Jan 1 00:01 tty -> ../../
devices/virtual/tty/tty
lrwxrwxrwx 1 root root 0 Jan 1 00:01 ttyS0 -
> ../../devices/platform/serial8250.0/ttyS0
lrwxrwxrwx 1 root root 0 Jan 1 00:01 ttyS1 -
> ../../devices/platform/serial8250.0/ttyS1
lrwxrwxrwx 1 root root 0 Jan 1 00:01 ttyS2 -
> ../../devices/platform/serial8250.0/ttyS2
dm17:/sys/class/tty $ cat ttyS0/dev
4:64
dm17:/sys/class/tty $ cat /proc/devices
Character devices:
1 mem
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
10 misc
90 mtd
128 ptm
136 pts
254 rtc
Block devices:
1 ramdisk
7 loop
31 mtdblock
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