[U-Boot-Users] Serial driver for smdk2440 board

[Wolfgang Denk]

In message <20041101140932.49098.qmail at web12005.mail.yahoo.com> you wrote:
> I was testing my hello_world application. It jumps
> corectly but prints some crap and then returns.
> 
> I think since there is no serial driver in uboot for
> s3c2440 therefore it gives junk output.

Ummm... If you have U-Boot running to the extend that you are able to
load and start a standalone program, then  there  is  also  a  serial
driver  in  place  and working. Or what do you think where the U-Boot
console messages are coming from?

> I have found a serial driver for my smdk2440 board in
> linux/drivers/serial/serial_s3c2440.c
> 
> So i now would like to plug in that driver in uboot.

No, you don't want to do that. The difference between a  full-fledged
Linux  serial  driver  and  an U-Boot console driver are about as the
differences between an ICBM and an arrow.

> What are the steps for plugging a new driver?

Understand the hardware.  Understand  the  U-Boot  design.  Code  the
driver. Debug the driver. Submit a patch.

> Also where does the driver get initialised? 

Probably in serial_init() ?

Best regards,

Wolfgang Denk

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