Re: Au1550 with kernel linux-2.6.28.1

[Frank Neuber <linux-mips@kernelport.de>]

Hi Manuel,
thank you for your quick response.

Am Samstag, den 24.01.2009, 08:57 +0100 schrieb Manuel Lauss:
> > I just want to ask who is working with the au1550 on a more recent
> > kernel than 2.6.16.11. 
> > I'll start now with some early printk to solve booting problems and than
> > we will see .....
> 
> I know of at least one person running 2.6.26 or .27 on a Au1550.
> You should start by throwing away the defconfig ;-).  Create a new
> config with only au1x00 serial and serial console enabled and then add
> new devices one at a time and see where it breaks.
Yestoday I tested the earlyprintk stuff witout luck :-(
I simply added this CMDLINE earlycon=uart,mmio,0x11100000,115200n8
console=ttyS0,115200n8 panic=1
The drivers/serial/8250_early.o is build in the kernel but without
adding CONFIG_EARLY_PRINTK or CONFIG_SYS_HAS_EARLY_PRINTK. Maybe this is
the problem.
On the running kernel I see this.
Serial: 8250/16550 driver $Revision: 1.90 $ 5 ports, IRQ sharing enabled
serial8250.7: ttyS0 at MMIO 0x11100000 (irq = 0) is a 16550A
serial8250.7: ttyS1 at MMIO 0x11200000 (irq = 8) is a 16550A
serial8250.7: ttyS2 at MMIO 0x11400000 (irq = 9) is a 16550A
The console is console=ttyS0,115200n8 ....

Now I'll go more deep into the kernel. 
> 
> (Btw, which board?  I'd love to get my hands on other alchemy boards to
> test on).
It is a customer board not available on the market.

It is possible for you to connect me to this person. Maybe we can share
some know how. At the moment I work on USB Analog/DVB stuff more deep on
MIPS.

Kind Regards,
 Frank