From: Pavel Machek <pavel@ucw.cz>
To: Stanislav Brabec <utx@penguin.cz>
Cc: Andy Green <andy@warmcat.com>, Eric Miao <eric.y.miao@gmail.com>,
dbaryshkov@gmail.com, Cyril Hrubis <metan@ucw.cz>,
arminlitzel@web.de, kernel list <linux-kernel@vger.kernel.org>,
Dirk@opfer-online.de, lenz@cs.wisc.edu, rpurdie@rpsys.net,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
thommycheck@gmail.com, zaurus-devel@www.linuxtogo.org,
omegamoon@gmail.com
Subject: Re: bit errors on spitz
Date: Sun, 21 Mar 2010 21:43:36 +0100 [thread overview]
Message-ID: <20100321204335.GM1933@elf.ucw.cz> (raw)
In-Reply-To: <1268384824.4963.35.camel@utx.utx.cz>
On Fri 2010-03-12 10:07:04, Stanislav Brabec wrote:
> Andy Green wrote:
> > On 03/11/10 15:42, Somebody in the thread at some point said:
> > > Andy Green wrote:
> > >
> > >> I saw very similar failures for a long time on our iMX31 based device.
> > >> Eventually I found a Freescale errata where the RAM inside the USB2
> > >> macrocell started to make single bit errors below 1.38V Vcore; ours was
> > >> 1.4V at that time but dipped on CPU load.
> > >
> > > Good tip. It seems that nobody ported driver for the voltage control
> > > chip ISL6271 from 2.4 kernel, and bootloader probably does not set
> > > correct values.
Are we sure about this one? If we have wrong voltages on various
parts, that kind-off explains it.
Would it be possible to measure (Voltmeter) difference between 2.4
kernel and 2.6 kernel?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2010-03-21 20:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-05 21:27 Pavel Machek
2010-03-08 5:37 ` Eric Miao
2010-03-08 7:28 ` Pavel Machek
2010-03-08 8:25 ` Cyril Hrubis
2010-03-08 11:48 ` Stanislav Brabec
2010-03-08 12:16 ` Cyril Hrubis
2010-03-08 12:42 ` Russell King - ARM Linux
2010-03-08 13:32 ` Cyril Hrubis
2010-06-03 0:01 ` [URGENT] Re: bit errors on spitz + voipac Marek Vasut
2010-06-03 2:30 ` Eric Miao
2010-03-21 20:40 ` bit errors on spitz Pavel Machek
2010-03-11 13:25 ` Andy Green
2010-03-11 15:42 ` Stanislav Brabec
2010-03-11 21:21 ` Andy Green
2010-03-12 9:07 ` Stanislav Brabec
2010-03-12 9:33 ` Andy Green
2010-03-12 10:43 ` Stanislav Brabec
2010-03-12 11:13 ` Andy Green
2010-03-21 20:43 ` Pavel Machek [this message]
2010-03-21 21:42 ` Stanislav Brabec
2010-03-29 18:27 ` Pavel Machek
2010-03-29 18:52 ` Stanislav Brabec
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