Re: [PATCH 21/21] ARM: Kirkwood: Remove DT support
- To: Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>, Kevin Hilman <khilman@linaro.org>
- Cc: linux-arm-kernel@lists.infradead.org, Ben Hutchings <ben@decadent.org.uk>, Andrew Lunn <andrew@lunn.ch>, Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>, debian-arm@lists.debian.org, Ian Campbell <ijc@hellion.org.uk>, Gregory Clement <gregory.clement@free-electrons.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, debian-kernel <debian-kernel@lists.debian.org>
- Subject: Re: [PATCH 21/21] ARM: Kirkwood: Remove DT support
- From: Jason Cooper <jason@lakedaemon.net>
- Date: Fri, 21 Feb 2014 10:58:45 -0500
- Message-id: <[🔎] 20140221155845.GB7862@titan.lakedaemon.net>
- In-reply-to: <[🔎] 1725547.sbei6Aef3A@wuerfel>
- References: <1391730137-14814-1-git-send-email-andrew@lunn.ch> <[🔎] 35719313.JyFlzSVKnx@wuerfel> <[🔎] 1392947251.15717.28.camel@deadeye.wl.decadent.org.uk> <[🔎] 1725547.sbei6Aef3A@wuerfel>
On Fri, Feb 21, 2014 at 02:07:40PM +0100, Arnd Bergmann wrote:
> On Friday 21 February 2014 01:47:31 Ben Hutchings wrote:
> > On Thu, 2014-02-20 at 16:19 +0100, Arnd Bergmann wrote:
> > > On Thursday 20 February 2014 14:21:10 Ian Campbell wrote:
> >
> > > For all I know, the only interesting ixp4xx platforms are the consumer
> > > products listed on http://www.nslu2-linux.org/, the other ones you support
> > > are development boards that tend to exist only in very small quantities.
> > >
> > > The main limitation would be the amount of installed RAM, which is
> > > either 32MB or 64MB depending on the machine for these. Running a
> > > modern Debian with these constraints is probably possible but
> > > doesn't sound like fun.
> >
> > Our most pressing constraint has actually been the size of the kernel
> > partition in flash, which is only ~1.4 MB on some of the iop32x and
> > ixp4xx machines (and ~1.5 MB on one of the orion5x machines). We've
> > modularised as much as possible and turned off some of the features that
> > are otherwise standard across all Debian architectures.
>
> Makes sense. I'm impressed you actually manage to get a modern kernel
> in 1.5MB and have it boot up a (mostly) full distro. I think we have
> in the past dropped a subarchitecture from the kernel when it turned
> out its defconfig could no longer fit within the 2MB of flash it
> has.
>
> > But I got fed up with trying to make it fit, and no-one else stepped up
> > to maintain the reduced configurations, so the last time iop32x went
> > over the limit I removed it. As Ian hinted, ixp4xx might follow.
>
> Ok. As I mentioned, I believe OpenWRT is really the playground for
> the remaining ixp4xx users that are doing new installs.
fwiw, I have two boards for this arch. NSLU2 and a Gateworks board.
Both are ixp425 and both are gathering dust in a box. I probably don't
have time to do anything with them. So, if Kevin or Olof wants to add
them to the boot farm, or someone actually wants to boot test them, I
would be willing to send them where ever.
iirc, there are hacks to upgrade at least the RAM on the NSLU2. I'm
pretty sure I maxed out the flash and the RAM on the Gateworks board
when I ordered it. Also, the Gateworks board has 4 mini-pci slots (not
pcie). Could be interesting.
hth,
Jason.
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