[U-Boot-Users] RE: Where is the CPU clock speed definition

[U-Boot-Users] RE: Where is the CPU clock speed definition

[wyu hotmail]

Hi,

CONFIG_SYS_CLK_FREQ is the input frequency of 405GP's clocking system. The 
internal PLL uses this frequency and the division parameters strapped from 
IO pins at power on reset to generate the different clocks needed in 405GP. 
You can find the detail description about 405GP's clock system in 405GP's 
user manual, which can be downloaded from IBM's website.

yuwp


>From: "Frank Young" <young726@hotmail.com>
>To: u-boot-users at lists.sourceforge.net
>Date: Thu, 03 Jun 2004 14:19:44 -0400
>Subject: [U-Boot-Users] Where is the CPU clock speed definition
>
>Hi,
>
>I am using a WALNUT with PPC405 200MHz CPU. I am trying to install the
>u-boot on this board. I have built the image. But before I put the image 
to
>the flash, I want to confirm one thing: do I have to configure the CPU 
speed
>for this board? I checked the file include/configs/WALNUT405.h. I only 
found
>a definition for CONFIG_SYS_CLK_FREQ, which is for external clock. Where 
is
>the CPU clock frequency defined?
>
>Thanks!
>
>Frank
>