From: Scott Wood <scottwood@freescale.com>
To: rmcguire@videopresence.com
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: DTS files, 83xx, clock frequencies
Date: Tue, 18 Dec 2007 17:59:20 -0600 [thread overview]
Message-ID: <47685ED8.2060204@freescale.com> (raw)
In-Reply-To: <000001c841ce$d11fcdd0$6405a8c0@absolut>
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
next prev parent reply other threads:[~2007-12-18 23:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.543.1198006353.17691.linuxppc-embedded@ozlabs.org>
2007-12-18 23:36 ` DTS files, 83xx, clock frequencies Russell McGuire
2007-12-18 23:59 ` Scott Wood [this message]
2007-12-19 15:14 ` Timur Tabi
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