From: andy@warmcat.com (Andy Green)
To: linux-arm-kernel@lists.infradead.org
Subject: bit errors on spitz
Date: Fri, 12 Mar 2010 09:33:37 +0000 [thread overview]
Message-ID: <4B9A0A71.7010206@warmcat.com> (raw)
In-Reply-To: <1268384824.4963.35.camel@utx.utx.cz>
On 03/12/10 09:07, Somebody in the thread at some point said:
>> Unless there's more to it in the way the zaurus using it that regulator
>> isn't programmable digitally.
>
> OOPS, I made a mistake and linked ISL6721 instead of ISL6271 there.
> Now it is fixed:
> http://www.penguin.cz/~utx/zaurus/datasheets/power/XScale/ISL6271A.pdf
>
> This one has I2C. It is connected to GPIO 3 (PWR_SCL) and GPIO 4
> (PWR_SDA).
Thanks... that defaults to 1.3V on Vcore if you don't touch it. I guess
confirm on the CPU datasheet that it's OK for your selected CPU clock speed.
> I guess that Zaurus has a good power design and that voltage should be
> constant enough. CF has a dedicated step down (plus 2.8V power detector
In that case is the PXA CF driver PIO? Then it can be the same load on
Vcore issue in disguise.
-Andy
WARNING: multiple messages have this Message-ID (diff)
From: Andy Green <andy@warmcat.com>
To: Stanislav Brabec <utx@penguin.cz>
Cc: 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>,
Pavel Machek <pavel@ucw.cz>,
thommycheck@gmail.com, zaurus-devel@www.linuxtogo.org,
omegamoon@gmail.com
Subject: Re: bit errors on spitz
Date: Fri, 12 Mar 2010 09:33:37 +0000 [thread overview]
Message-ID: <4B9A0A71.7010206@warmcat.com> (raw)
In-Reply-To: <1268384824.4963.35.camel@utx.utx.cz>
On 03/12/10 09:07, Somebody in the thread at some point said:
>> Unless there's more to it in the way the zaurus using it that regulator
>> isn't programmable digitally.
>
> OOPS, I made a mistake and linked ISL6721 instead of ISL6271 there.
> Now it is fixed:
> http://www.penguin.cz/~utx/zaurus/datasheets/power/XScale/ISL6271A.pdf
>
> This one has I2C. It is connected to GPIO 3 (PWR_SCL) and GPIO 4
> (PWR_SDA).
Thanks... that defaults to 1.3V on Vcore if you don't touch it. I guess
confirm on the CPU datasheet that it's OK for your selected CPU clock speed.
> I guess that Zaurus has a good power design and that voltage should be
> constant enough. CF has a dedicated step down (plus 2.8V power detector
In that case is the PXA CF driver PIO? Then it can be the same load on
Vcore issue in disguise.
-Andy
next prev parent reply other threads:[~2010-03-12 9:33 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-05 21:27 bit errors on spitz Pavel Machek
2010-03-05 21:27 ` Pavel Machek
2010-03-08 5:37 ` Eric Miao
2010-03-08 5:37 ` Eric Miao
2010-03-08 7:28 ` Pavel Machek
2010-03-08 7:28 ` Pavel Machek
2010-03-08 8:25 ` Cyril Hrubis
2010-03-08 8:25 ` Cyril Hrubis
2010-03-08 11:48 ` Stanislav Brabec
2010-03-08 11:48 ` Stanislav Brabec
2010-03-08 12:16 ` Cyril Hrubis
2010-03-08 12:16 ` Cyril Hrubis
2010-03-08 12:42 ` Russell King - ARM Linux
2010-03-08 12:42 ` Russell King - ARM Linux
2010-03-08 13:32 ` Cyril Hrubis
2010-03-08 13:32 ` Cyril Hrubis
2010-06-03 0:01 ` [URGENT] Re: bit errors on spitz + voipac Marek Vasut
2010-06-03 0:01 ` Marek Vasut
2010-06-03 2:30 ` Eric Miao
2010-06-03 2:30 ` Eric Miao
2010-03-21 20:40 ` bit errors on spitz Pavel Machek
2010-03-21 20:40 ` Pavel Machek
2010-03-11 13:25 ` Andy Green
2010-03-11 13:25 ` Andy Green
2010-03-11 15:42 ` Stanislav Brabec
2010-03-11 15:42 ` Stanislav Brabec
2010-03-11 21:21 ` Andy Green
2010-03-11 21:21 ` Andy Green
2010-03-12 9:07 ` Stanislav Brabec
2010-03-12 9:07 ` Stanislav Brabec
2010-03-12 9:33 ` Andy Green [this message]
2010-03-12 9:33 ` Andy Green
2010-03-12 10:43 ` Stanislav Brabec
2010-03-12 10:43 ` Stanislav Brabec
2010-03-12 11:13 ` Andy Green
2010-03-12 11:13 ` Andy Green
2010-03-21 20:43 ` Pavel Machek
2010-03-21 20:43 ` Pavel Machek
2010-03-21 21:42 ` Stanislav Brabec
2010-03-21 21:42 ` Stanislav Brabec
2010-03-29 18:27 ` Pavel Machek
2010-03-29 18:27 ` Pavel Machek
2010-03-29 18:52 ` Stanislav Brabec
2010-03-29 18:52 ` Stanislav Brabec
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