[U-Boot-Users] Is it easy to config BR1/OR1 as SDRAM in u-boot?

[U-Boot-Users] Is it easy to config BR1/OR1 as SDRAM in u-boot?

[solaz]

Hi, friends,

I am new to this forum.

Currently we are working on u-boot for our customized board (use MPC8272).
Our reference board is mpc8272ads board from freescale. U-boot configiures
mpc8272ads board as one of the mpc8260ads family. And u-boot uses BR0/OR0,
BR1/OR1 for flash and BR2/OR2, BR3/OR3 for SDRAM.  However, our customized
board is configured using CS1 (BR1/OR1) for the SDRAM.

How can I modify the u-boot source code for the mpc8260ads family to let
u-boot recognize BR1/OR1 as SDRAM? I don't know how many files will be
related to this change and how 'deep' I will go.

or let the hardware engineer change SDRAM to CS2 (BR2/OR2) may be easier?

Thank you for your advice,

solaz



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[U-Boot-Users] Is it easy to config BR1/OR1 as SDRAM in u-boot?

[Wolfgang Denk]

In message <16145448.post@talk.nabble.com> you wrote:
> 
> How can I modify the u-boot source code for the mpc8260ads family to let
> u-boot recognize BR1/OR1 as SDRAM? I don't know how many files will be
> related to this change and how 'deep' I will go.

It is not at all clear that the mpc8260ads port is  a  good  starting
point for your own design. Depending how closely your hadrware design
was  copied from the mpc8260ads this may or may not be a good idea. I
recommend to check again.

> or let the hardware engineer change SDRAM to CS2 (BR2/OR2) may be easier?

Changing  the  software  is  definitely  easier.  But  you  need   to
understand  that  you  have  a  full port of U-Boot to a new board in
front of you - this is *not* just mndifying a few of  the  mpc8260ads
config settings here and there.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"It ain't so much the things we don't know that get  us  in  trouble.
It's  the  things  we know that ain't so." - Artemus Ward aka Charles
Farrar Brown

[U-Boot-Users] Is it easy to config BR1/OR1 as SDRAM in u-boot?

[solaz]

You are right. I checked the TQM8260 and found several interesting things. 
Thank you very much.

solaz



wd wrote:
> 
> In message <16145448.post@talk.nabble.com> you wrote:
>> 
>> How can I modify the u-boot source code for the mpc8260ads family to let
>> u-boot recognize BR1/OR1 as SDRAM? I don't know how many files will be
>> related to this change and how 'deep' I will go.
> 
> It is not at all clear that the mpc8260ads port is  a  good  starting
> point for your own design. Depending how closely your hadrware design
> was  copied from the mpc8260ads this may or may not be a good idea. I
> recommend to check again.
> 
>> or let the hardware engineer change SDRAM to CS2 (BR2/OR2) may be easier?
> 
> Changing  the  software  is  definitely  easier.  But  you  need   to
> understand  that  you  have  a  full port of U-Boot to a new board in
> front of you - this is *not* just mndifying a few of  the  mpc8260ads
> config settings here and there.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> "It ain't so much the things we don't know that get  us  in  trouble.
> It's  the  things  we know that ain't so." - Artemus Ward aka Charles
> Farrar Brown
> 
> -------------------------------------------------------------------------
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