From: David Gibson <david@gibson.dropbear.id.au>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>, Michal Simek <Monstr@seznam.cz>
Subject: Re: FDT for Microblaze and PPC405
Date: Wed, 12 Sep 2007 12:03:39 +1000 [thread overview]
Message-ID: <20070912020339.GC16001@localhost.localdomain> (raw)
In-Reply-To: <fa686aa40709111009j64925edag511078d88ff904c@mail.gmail.com>
On Tue, Sep 11, 2007 at 11:09:07AM -0600, Grant Likely wrote:
> On 9/11/07, Michal Simek <Monstr@seznam.cz> wrote:
> > For example emaclite driver needs information about turning on/off ping pong buffer...
> >
> > I would like to make this properly.
>
> FDT design is just as much art as it is science. It takes taste and
> judgement to desgin a nice set of bindings. Your best option is to
> draft something and post it to the linuxppc-embedded mailing list for
> review.
Yes, this is the preferred procedure, for now.
> > And second question is on early console logs and timers setting. I read about aliases in FDT. I think that aliases can cover this setting.
> > For example my design contain 4 serial line and I would like to know which serial line is set on early console.
>
> You use the chosen node for this. In the chosen node, you add a
> property called "linux,stdout-path" which holds the path to your
> console. You can look at examples under arch/powerpc/boot/dts/*
Yes. Currently we don't use /aliases in the flat device tree. This
is possibly a mistake, and something I'm thinking about changing.
But, for now, linux,stdout-path in /chosen is the way to do this.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
next prev parent reply other threads:[~2007-09-12 2:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa686aa40709110901k11082946r626fc8532d47eab5@mail.gmail.com>
[not found] ` <2057.3992-23959-31980099-1189527824@seznam.cz>
2007-09-11 17:09 ` FDT for Microblaze and PPC405 Grant Likely
2007-09-12 2:03 ` David Gibson [this message]
2007-09-12 7:34 ` Michal Simek
2007-09-14 19:35 ` Michal Simek
2007-09-23 18:40 Michal Simek
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