Re: [Ltib] Vanilla kernel 2.6.25.4 for MPC8315E-RDB has serial console bitrate issues

[Stuart Hughes]

Hi Leon,

I just heard back that you probably need to update your u-boot.  I was
directed to a thread here:
http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/41793
where it was being discussed.

Regards, Stuart

On Wed, 2008-05-28 at 20:44 +0200, Leon Woestenberg wrote:
> Hello,
> 
> I have tried to run the vanilla upstream 2.6.25.4 kernel on my
> MPC8315E-RDB board, but the serial console seems not to respect the
> bitrate I give it in u-boot.
> (nor does it default to the well-known often used values 9600 ... 230400).
> 
> Some findings so far:
> - The on-flash Linux 2.6.23 that comes from the on-board flash runs
> fine and gives me a 115200 bps serial console.
> - 2.6.25.4 using the default config and default device tree that comes
> with the kernel gives me garbled output.
> - 2.6.25.4, but this time using the on-flash device tree (also) gives
> me garbled output.
> - The u-boot command line ("setenv bootargs console=ttyS0,115200") is
> interpreted by the kernel, because different baudrates give me
> reproducable but different garbage at each speed.
> - Enabling early debug
> 
> U-Boot 1.3.0-rc2 (Nov 19 2007 - 16:37:36) MPC83XX
> 
> CPU:   e300c3, MPC8315E, Rev: 10 at 400 MHz, CSB:  133 MHz
> Board: Freescale MPC8315ERDB Rev 0.0
> 
> Did someone try 2.6.25.4 on their MPC8315E yet?
> 
> I think I will try 2.6.26-rc and use an oscilloscope later this week,
> 
> Regards,