On 30/05/17 08:30, Robert Nelson wrote:
> Hi Peter,
<snip>
>
> systemd should trigger on:
>
> debug: [console=ttyO0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4
> rootwait coherent_pool=1M net.ifnames=0 quiet cape_universal=enable]
> ...
>
> and setup a serial login console...
>
> do you have this udev rule installed?
>
>
https://github.com/rcn-ee/repos/blob/master/bb-customizations/suite/jessie/debian/60-omap-tty.rules
Yes
$cat /etc/udev/rules.d/60-omap-tty.rules
# Backward compatibility with old OMAP UART-style ttyO0 naming
SUBSYSTEM=="tty", ATTR{uartclk}!="0", KERNEL=="ttyS[0-9]", SYMLINK+="ttyO%n"
----
$udevadm info -q property -n /dev/ttyS0
DEVLINKS=/dev/ttyO0
DEVNAME=/dev/ttyS0
DEVPATH=/devices/platform/ocp/44e09000.serial/tty/ttyS0
ID_MM_CANDIDATE=1
MAJOR=4
MINOR=64
SUBSYSTEM=tty
TAGS=:systemd:
USEC_INITIALIZED=2977846
net.ifnames=0
lrwxrwxrwx 1 root root 5 May 29 21:59 /dev/ttyO0 -> ttyS0
lrwxrwxrwx 1 root root 5 May 30 07:10 /dev/ttyO1 -> ttyS1
lrwxrwxrwx 1 root root 5 May 30 07:10 /dev/ttyO2 -> ttyS2
lrwxrwxrwx 1 root root 5 May 30 07:10 /dev/ttyO4 -> ttyS4
crw--w---- 1 root tty 4, 64 May 29 21:59 /dev/ttyS0
crw-rw---- 1 root dialout 4, 65 May 30 07:10 /dev/ttyS1
crw-rw---- 1 root dialout 4, 66 May 30 07:10 /dev/ttyS2
crw-rw---- 1 root dialout 4, 67 May 29 21:59 /dev/ttyS3
crw-rw---- 1 root dialout 4, 68 May 30 07:10 /dev/ttyS4
crw-rw---- 1 root dialout 4, 69 May 29 21:59 /dev/ttyS5
--
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