From: "Grant Likely" <grant.likely@secretlab.ca>
To: "Wolfgang Grandegger" <wg@grandegger.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: FDT for MPC5200, CPU revision, MSCAN
Date: Fri, 20 Apr 2007 08:02:51 -0600 [thread overview]
Message-ID: <528646bc0704200702i328ba9dbvc62473e5a634d5ac@mail.gmail.com> (raw)
In-Reply-To: <46286A0F.9080608@grandegger.com>
On 4/20/07, Wolfgang Grandegger <wg@grandegger.com> wrote:
> Wolfgang Grandegger wrote:
> > Hello,
> >
> > is there a way to distinguish the CPU revision (Rev.A vs. Rev.B) of the
> > MPC5200, preferably at run time? Or should this be defined in the FDT?
> > I ask, because some settings depend on the CPU revision due to hardware
> > bugs, like the clock source used for MSCAN.
This stuff is defined in the device tree. If you need to detect the
version at runtime, then ideally your bootloader will read the PVR/SVR
to determine the chip version and then pass the correct FDT to the
kernel.
> I found the information here:
>
> $ cat Documentation/powerpc/mpc52xx-device-tree-bindings.txt
<snip>
> Sorry for the noise.
Not noise; good question.
g.
--
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195
next prev parent reply other threads:[~2007-04-20 14:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-20 6:59 FDT for MPC5200, CPU revision, MSCAN Wolfgang Grandegger
2007-04-20 7:21 ` Wolfgang Grandegger
2007-04-20 14:02 ` Grant Likely [this message]
2007-04-20 16:11 ` Wolfgang Grandegger
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