[U-Boot-Users] CONFIG_SYS_CLK_FREQ
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..
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
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
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@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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participants (3)
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Alan Casey -
Daniel Ann -
Stefan Roese