[U-Boot] Change console output from DUART to APPUART

[U-Boot] Change console output from DUART to APPUART

[mad mad]

Hi,

I'm new to this list and don't know whether this is the right place to ask
this question.

I have a board nearly equal to the mx28evk, excepting that I need to use
AUART3 instead of DUART for the console output.

My idea was to simply to change CONFIG_PL01x_PORTS in the board
configuration from MXS_UARTDBG_BASE to MXS_UARTAPP3_BASE and keep the
CONFIG_CONS_INDEX at 0. But this isn't working.

Now, i have no idea how to continue.

I searched the documentation, the source code and the internet for days,
but I can't find any useful solution. Maybe someone can give me a clue how
to solve this issue.

Thanks!

Matt

[U-Boot] Change console output from DUART to APPUART

[Albert ARIBAUD]

Hi mad,

On Fri, 10 Aug 2012 14:16:17 +0200, mad mad <mapx83@gmail.com> wrote:
> Hi,
> 
> I'm new to this list and don't know whether this is the right place
> to ask this question.
> 
> I have a board nearly equal to the mx28evk, excepting that I need to
> use AUART3 instead of DUART for the console output.
> 
> My idea was to simply to change CONFIG_PL01x_PORTS in the board
> configuration from MXS_UARTDBG_BASE to MXS_UARTAPP3_BASE and keep the
> CONFIG_CONS_INDEX at 0. But this isn't working.
> 
> Now, i have no idea how to continue.
> 
> I searched the documentation, the source code and the internet for
> days, but I can't find any useful solution. Maybe someone can give me
> a clue how to solve this issue.
> 
> Thanks!
> 
> Matt

Adding Fabio as the maintainer for mx28evk -- he might have some ideas
based on the board HW.

Are AUART3 and DUART identical except for base address? If not, I
suspect your change is not enough and you'll have to develop a spacific
AUART driver or derive one from existing code.

Amicalement,
-- 
Albert.

[U-Boot] Change console output from DUART to APPUART

[Fabio Estevam]

On 8/14/12, Albert ARIBAUD <albert.u.boot@aribaud.net> wrote:

> Adding Fabio as the maintainer for mx28evk -- he might have some ideas
> based on the board HW.
>
> Are AUART3 and DUART identical except for base address? If not, I
> suspect your change is not enough and you'll have to develop a spacific
> AUART driver or derive one from existing code.

Yes, this is correct. A driver for the mxs AUART is currently not
available in U-boot.

The one from kernel can be used as a reference:
drivers/tty/serial/mxs-auart.c

Regards,

Fabio Estevam