-P?vodn? spr?va-
Od: Laurent Pinchart [mailto:laurent.pinchart at tbox.biz]
Odoslan?: 22. m?ja 2006 14:12
Komu: linuxppc-embedded at ozlabs.org
Predmet: Re: SCC1 as serial console
Hi Ladislav,
can anybody help me to setup the SCC1 port as serial console on MPC860 with
kernel 2.6.15.4? I would like to use it as system console during the
booting proccess. I can not get any output on serial console during booting
proccess, I use uboot.
Does SCC1 work correctly in U-Boot ? If not, you should fix that first. I'll
assume it does.
Yes, it works fine for kernel 2.4.22.
There are many issues which could lead to a silent serial console. The serial
port could be misconfigured, or the kernel could crash for another reason
before the serial port is initialized.
I did a little experiment, I turn off the root file system so my
kernel(system,..) restart
after 180 seconds. When there was something wrong the there wasn't system
restart.
But, ofcourse I CAN NOT be sure that this selince is due an another error or I
just can
not see the output.
Have you been able to get a serial console on another serial port (SMC) ? Are
the clock frequencies computed by U-Boot and passed to the Linux kernel
correct ?
Please can you explain how to get thi serial to SMC?
Do you have a hardware debugger (BDI2000) that you can connect to the
processor to see if Linux crashes before initializing the serial port ? If
not, you will probably have to take a try at led-debugging (make some leds
blink at various point in the Linux kernel to try to find out what happens),
but that's really no fun.
No I don't have any :(
Ladislav Klenovic___
Linuxppc-embedded mailing list
Linuxppc-embedded at ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
