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Message-ID: <20140614084905.GB15326@Nokia-N900>
Date:	Sat, 14 Jun 2014 10:49:06 +0200
From:	Pavel Machek <pavel@....cz>
To:	Daniel Drake <dsd@...top.org>
Cc:	kernel list <linux-kernel@...r.kernel.org>, chris@...ntf.net,
	dsd@...too.org
Subject: Re: Kernel for olpc-1.75

Hi!

> On Sat, Jun 7, 2014 at 11:53 PM, Pavel Machek <pavel@....cz> wrote:
> > I broke installation on olpc-1.75, and I guess its time for it to
> > start running self-compiled kernel. (It still boots if I hold right
> > game key, but I can no longer control backlight. It does not boot at
> > all by default.)
> >
> > AFAICT, olpc.fth and zImage in the boot/ directory of USB disk should
> > do the trick.
> >
> > Unfortunately, 3.0 based kernels no longer compile with current tools,
> > so I tried this version (3.6 based).
> 
> Sorry but OLPC never progressed beyond shipping 3.0 on this hardware,
> and low-level development only really happens in maintenance mode at
> the moment.

Ok, wip-3.0 branch boots on the hardware. Good so far... but
touchpad does not work... If you have any idea about that...)

Redhat update kernel (yes, I made a mistake of installing that)
has broken backlight controls, and only boots in development
mode. Ideas here would be welcome, too...

> We did almost get a newer version working, but it had some unresolved
> issues that prevented us from shipping it to users. I'm not sure of
> the state of that arm-3.6 branch you are trying but I don't see
> anything wrong in your process. I would try early printascii() calls
> and a serial cable next.
> 
> Mainline won't run on the machine in any kind of usable state without
> quite a bit of work on drivers and DT (which comes from the firmware).
> I did once start on that but didn't manage to get even the initial
> easy patches past the Marvell maintainers :(

Ok, let me try to get machine into semi-working state, and
then I can think about updating kernels...
						Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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