Subject: Re: DTS files, 83xx, clock frequencies

From: Scott Wood <[email-masked]>
Date: Tue, 18 Dec 2007 17:59:20 -0600

Russell McGuire wrote:
> I note that in most of the 83xx dts config files that the different
> frequency fields are being populated with non-zero numbers. i.e. bus-freq,
> clock-freq, core-freq, etc...
> 
> Isn't default behavior that these fields are kept from the <BIOS> U-boot
> during boot, if a zero is present?

U-boot overwrites those values regardless of whether they were zero in 
the dts.

> Is there any advantage to resetting them
> within the dts file during linux boot up?

No, and it doesn't.  If you're looking arch/powerpc/boot, then that's 
for compatibility with non-device-tree-aware u-boots.

-Scott