[U-Boot-Users] CONFIG_SYS_CLK_FREQ

[U-Boot-Users] CONFIG_SYS_CLK_FREQ

[Daniel Ann]

hi all,

Quick question on CONFIG_SYS_CLK_FREQ

For system running with 33MHz is it correct to define it as 33,333,333
or should it be 33,000,000.

It shouldnt concern too much, but seeing that something like
33,333,000 is even used, couldnt help wonder what should it really
be..

-- 
Daniel

[U-Boot-Users] CONFIG_SYS_CLK_FREQ

[Stefan Roese]

Hi Daniel,

On Thursday 07 April 2005 07:54, Daniel Ann wrote:

> Quick question on CONFIG_SYS_CLK_FREQ
>
> For system running with 33MHz is it correct to define it as 33,333,333
> or should it be 33,000,000.

You have to use what _realy_ is used on your hardware. So check with your 
hardware designers, if they soldered a 33.0 MHz oscillator or a 33.333 or...

> It shouldnt concern too much, but seeing that something like
> 33,333,000 is even used, couldnt help wonder what should it really
> be..

Yes, it should concern. Keep in mind, that a change from 33.0 to 33.3 is 1% 
and this could result in the system clock running 1% slower (or faster) as 
desired!

Best regards,
Stefan

[U-Boot-Users] CONFIG_SYS_CLK_FREQ

[Daniel Ann]

On Apr 7, 2005 3:09 PM, Stefan Roese <sr@denx.de> wrote:
> You have to use what _realy_ is used on your hardware. So check with your
> hardware designers, if they soldered a 33.0 MHz oscillator or a 33.333 or...

Thanks. Quick peak at the osc. it's got 33.000000 written on it :P

-- 
Daniel

[U-Boot-Users] CONFIG_SYS_CLK_FREQ

[Alan Casey]

Hi,

  I have not seen this configuration variable
  mentioned in the u-boot README file in the
  base directory(latest release) - can 
  CONFIG_SYS_CLK_FREQ be used for all platforms?? 
  
  Specifically i would like to use it or something  
  similar to allow me to set the clock frequency of 
  the ARM Core on the Integrator/CP to run at 140MHz
  (max. reliable).

  At the moment Linux appears to be defaulting
  to running at some slow default core clock 
  frequency on the platform (probably ~25MHz).

  Any info. appreciated,
  Regards,
  Alan.

>-- Original Message --
>From: Daniel Ann <ktdann@gmail.com>
>Reply-To: Daniel Ann <ktdann@gmail.com>
>To: Stefan Roese <sr@denx.de>
>Subject: Re: [U-Boot-Users] CONFIG_SYS_CLK_FREQ
>Cc: u-boot-users at lists.sourceforge.net
>Date: Thu, 7 Apr 2005 15:29:05 +0900
>
>
>On Apr 7, 2005 3:09 PM, Stefan Roese <sr@denx.de> wrote:
>> You have to use what _realy_ is used on your hardware. So check with
your
>> hardware designers, if they soldered a 33.0 MHz oscillator or a 33.333
>or...
>
>Thanks. Quick peak at the osc. it's got 33.000000 written on it :P
>
>-- 
>Daniel
>
>
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