* printk() does not work on UART1
@ 2008-01-09 0:11 mike zheng
2008-01-09 5:06 ` mike zheng
2008-01-09 5:11 ` mike zheng
0 siblings, 2 replies; 5+ messages in thread
From: mike zheng @ 2008-01-09 0:11 UTC (permalink / raw)
To: linuxppc-dev
Hi All,
I have one mpc8568 board using UART1 as the serial port. The OS is
Linux Kernel2.4. If I use the polling mode driver of
gen550_progress(), it works fine. However the printk() does not work
after the console_init(). Anyone know what shall I change in the
kernel to use UART1 as serial console? I assume the default is UART0,
but I don't know where the value is set. I changed the CONFIG_CMDLINE
to ttyS1, it does NOT work.
Thanks for your help,
Mike
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: printk() does not work on UART1
2008-01-09 0:11 printk() does not work on UART1 mike zheng
@ 2008-01-09 5:06 ` mike zheng
2008-01-09 14:14 ` Haiying Wang
2008-01-09 5:11 ` mike zheng
1 sibling, 1 reply; 5+ messages in thread
From: mike zheng @ 2008-01-09 5:06 UTC (permalink / raw)
To: linuxppc-dev
Hi All,
I have one mpc8568 board using UART1 as the serial port. The OS is
Linux Kernel2.4. If I use the polling mode driver of
gen550_progress(), it works fine. However the printk() does not work
after the console_init(). Anyone know what shall I change in the
kernel to use UART1 as serial console? I assume the default is UART0,
but I don't know where the value is set. I changed the CONFIG_CMDLINE
to ttyS1, it does NOT work.
Thanks for your help,
Mike
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: printk() does not work on UART1
2008-01-09 5:06 ` mike zheng
@ 2008-01-09 14:14 ` Haiying Wang
2008-01-09 15:34 ` mike zheng
0 siblings, 1 reply; 5+ messages in thread
From: Haiying Wang @ 2008-01-09 14:14 UTC (permalink / raw)
To: mike zheng; +Cc: linuxppc-dev
On Wed, 2008-01-09 at 00:06 -0500, mike zheng wrote:
> Hi All,
>
> I have one mpc8568 board using UART1 as the serial port. The OS is
> Linux Kernel2.4. If I use the polling mode driver of
> gen550_progress(), it works fine. However the printk() does not work
> after the console_init(). Anyone know what shall I change in the
> kernel to use UART1 as serial console? I assume the default is UART0,
> but I don't know where the value is set. I changed the CONFIG_CMDLINE
> to ttyS1, it does NOT work.
Make sure you've configured PC0/1/2/3 for UART1 SOUT/RTS/CTS/SIN in
u-boot.
Haiying
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: printk() does not work on UART1
2008-01-09 14:14 ` Haiying Wang
@ 2008-01-09 15:34 ` mike zheng
0 siblings, 0 replies; 5+ messages in thread
From: mike zheng @ 2008-01-09 15:34 UTC (permalink / raw)
To: Haiying Wang; +Cc: linuxppc-dev
I found the problem. The CONFIG_CMDLINE was overwritten. Right now, it
is working.
Thanks for all the help,
Mike
On 1/9/08, Haiying Wang <Haiying.Wang@freescale.com> wrote:
> On Wed, 2008-01-09 at 00:06 -0500, mike zheng wrote:
> > Hi All,
> >
> > I have one mpc8568 board using UART1 as the serial port. The OS is
> > Linux Kernel2.4. If I use the polling mode driver of
> > gen550_progress(), it works fine. However the printk() does not work
> > after the console_init(). Anyone know what shall I change in the
> > kernel to use UART1 as serial console? I assume the default is UART0,
> > but I don't know where the value is set. I changed the CONFIG_CMDLINE
> > to ttyS1, it does NOT work.
>
> Make sure you've configured PC0/1/2/3 for UART1 SOUT/RTS/CTS/SIN in
> u-boot.
>
> Haiying
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* printk() does not work on UART1
2008-01-09 0:11 printk() does not work on UART1 mike zheng
2008-01-09 5:06 ` mike zheng
@ 2008-01-09 5:11 ` mike zheng
1 sibling, 0 replies; 5+ messages in thread
From: mike zheng @ 2008-01-09 5:11 UTC (permalink / raw)
To: linuxppc-embedded
Hi All,
I have one mpc8568 board using UART1 as the serial port. The OS is
Linux Kernel2.4. If I use the polling mode driver of
gen550_progress(), it works fine. However the printk() does not work
after the console_init(). Anyone know what shall I change in the
kernel to use UART1 as serial console? I assume the default is UART0,
but I don't know where the value is set. I changed the CONFIG_CMDLINE
to ttyS1, it does NOT work.
Thanks for your help,
Mike
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2008-01-09 15:34 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2008-01-09 0:11 printk() does not work on UART1 mike zheng
2008-01-09 5:06 ` mike zheng
2008-01-09 14:14 ` Haiying Wang
2008-01-09 15:34 ` mike zheng
2008-01-09 5:11 ` mike zheng
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