linux 2.6 hangs at __delay function on Viretx 4 board

John Linn John.Linn at
Thu Jun 5 07:22:31 EST 2008

Hi Peter,

Yes you need to enable UARTLITE as the console in the kernel

You have the command line syntax, ttyUL0, correct.

They have now changed the UART 16550 to be a free core in the EDK, not
sure which version of the EDK that happened.


-----Original Message-----
From: at
[ at] On
Behalf Of Peter Korsgaard
Sent: Wednesday, June 04, 2008 2:56 AM
To: swamydp
Cc: linuxppc-embedded at
Subject: Re: linux 2.6 hangs at __delay function on Viretx 4 board

>>>>> "swamydp" == swamydp  <swamydp at> writes:

 swamydp> Hi John

 swamydp> I am using UARTLITE as serial console. I do not have license
 swamydp> for UART 16550.  I have enabled the drivers for uartlite in
 swamydp> menuconfig while configuring the kernel. I have tested all
 swamydp> combinations for the kernel command line - tty0, ttyUL0,
 swamydp> ttyl0, ttyS0 but could not get uartlite to output kernel
 swamydp> printk messages.

Correct syntax is console=ttyUL0

 swamydp> Since I am using uartlite , the following settings are
 swamydp> turned off in menuconfig

 swamydp> CONFIG_SERIAL_8250=n
 swamydp> CONFIG_SERIAL_8250_CONSOLE=n

Do you have console on uartlite (CONFIG_SERIAL_UARTLITE_CONSOLE)

Bye, Peter Korsgaard
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