Where is the CPU clock speed definition
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
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From: "Frank Young" <[email protected]>
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 definitionHi,
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
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the flash, I want to confirm one thing: do I have to configure the CPU
speed
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for this board? I checked the file
include/configs/WALNUT405.h. I only
found
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a definition for
CONFIG_SYS_CLK_FREQ, which is for external clock. Where
is
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the CPU clock frequency defined?
Thanks!
Frank