RE: [ECOS] Changing IXP425 core clock speed

RE: [ECOS] Changing IXP425 core clock speed

[Vanitha Ramaswami]

Hello,
Thanks for your reply. Is it  possible to test this by changing some 
resistors in the hardware..?./Do i still need to modify redboot..There will 
not be any changes to the linux kernel that i am running right..?

Thanks
Vanitha

On Friday, July 08, 2005 4:31 PM, David Vrabel [SMTP:dvrabel@arcom.com] 
wrote:
> Vanitha Ramaswami wrote:
> >
> > I need to reduce the core clock speed of ixp425 to 266 MHz. can any-one 

> > point to me in redboot how do i modify the IXP425_EXP_CNFG0 register..?
>
> The clock speed must be pin-strapped at reset and can't be run-time
> modified.
>
> David Vrabel
> --
> David Vrabel, Design Engineer
>
> Arcom, Clifton Road           Tel: +44 (0)1223 411200 ext. 3233
> Cambridge CB1 7EA, UK         Web: http://www.arcom.com/
> 

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Re: [ECOS] Changing IXP425 core clock speed

[David Vrabel]

Vanitha Ramaswami wrote:
> 
> Thanks for your reply. Is it  possible to test this by changing some 
> resistors in the hardware..?

You'll need to ask the designer of the board.

> Do i still need to modify redboot..There will 
> not be any changes to the linux kernel that i am running right..?

No changes should be needed.

David Vrabel
-- 
David Vrabel, Design Engineer

Arcom, Clifton Road           Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK         Web: http://www.arcom.com/

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Re: [ECOS] Changing IXP425 core clock speed

[David Vrabel]

Vanitha Ramaswami wrote:
> 
> I need to reduce the core clock speed of ixp425 to 266 MHz. can any-one 
> point to me in redboot how do i modify the IXP425_EXP_CNFG0 register..?

The clock speed must be pin-strapped at reset and can't be run-time
modified.

David Vrabel
-- 
David Vrabel, Design Engineer

Arcom, Clifton Road           Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK         Web: http://www.arcom.com/

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Re: [ECOS] Changing IXP425 core clock speed

[Supreeth Reddy]

You could change the CNFG0 settings in the
hal_platform_setup.h in the macro 

// This macro represents the initial startup code for
the platform        
	.macro _platform_setup1


--- Vanitha Ramaswami <vanitha@agilis.stengg.com>
wrote:

> Hi
> 
> I need to reduce the core clock speed of ixp425 to
> 266 MHz. can any-one 
> point to me in redboot how do i modify the
> IXP425_EXP_CNFG0 register..?
> 
> Thanks
> Vanitha
> 
> [This e-mail is confidential and may be priviledged.
> If you are not the
> intended recipient, please kindly notify us
> immediately and delete the message
> from your system; please do not copy or use it for
> any purpose, nor disclose
> its contents to any other person. Thank you.]
> ---ST Electronics Group---
> 
> 
> -- 
> Before posting, please read the FAQ:
> http://ecos.sourceware.org/fom/ecos
> and search the list archive:
> http://ecos.sourceware.org/ml/ecos-discuss
> 
> 



	
	
		
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[ECOS] Changing IXP425 core clock speed

[Vanitha Ramaswami]

Hi

I need to reduce the core clock speed of ixp425 to 266 MHz. can any-one 
point to me in redboot how do i modify the IXP425_EXP_CNFG0 register..?

Thanks
Vanitha

[This e-mail is confidential and may be priviledged. If you are not the
intended recipient, please kindly notify us immediately and delete the message
from your system; please do not copy or use it for any purpose, nor disclose
its contents to any other person. Thank you.]
---ST Electronics Group---


-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss