From: Michael Fuckner <michael-iWcS09LKDTLR7s880joybQ@public.gmane.org>
To: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
Cc: Michael Lawnick <ml.lawnick-Mmb7MZpHnFY@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Decode dimms on dual socket machines
Date: Wed, 13 Apr 2011 12:06:59 +0200 [thread overview]
Message-ID: <4DA575C3.1050100@fuckner.net> (raw)
In-Reply-To: <20110413103952.68bdb6fa-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
On 04/13/2011 10:39 AM, Jean Delvare wrote:
>> The challenge will be to detect which of the 8 supported devices (
>> pca_9540, pca_9542, pca_9543, pca_9544, pca_9545, pca_9546, pca_9547,
>> pca_9548) is actually to be used.
>
> In Michael's case it is irrelevant anyway, as the information he found
> meanwhile clearly indicates that bus multiplexing is achieved by GPIOs
> (most certainly on the ICH10) and not an PCA954x chip. The chip at 0x70
> is probably the Intel 5500 IOH.
Supermicro just gave me the following information:
To access all SPDs, you have to pull low GPIO49 (IO_0x528 bit 17) first.
Then pull low GPIO52 (IO_0x528 bit 20) to access first CPU
memory(0x50~0x55); pull high GPIO52 to access 2nd CPU memory(0x50~0x55).
I can't find anything about GPIO49/52,53 in Datasheet for 5500/5520 chipset
http://www.intel.com/assets/pdf/datasheet/321328.pdf
So it is probably connected to ICH10
http://www.intel.com/Assets/PDF/datasheet/319973.pdf
but I don't know how to use this information
Regards,
Michael!
next prev parent reply other threads:[~2011-04-13 10:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 10:10 Decode dimms on dual socket machines Michael Fuckner
[not found] ` <4DA4250A.3060907-iWcS09LKDTLR7s880joybQ@public.gmane.org>
2011-04-12 11:26 ` Jean Delvare
[not found] ` <20110412132611.045ace21-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-12 12:52 ` Michael Fuckner
[not found] ` <4DA44B05.906-iWcS09LKDTLR7s880joybQ@public.gmane.org>
2011-04-12 13:53 ` Jean Delvare
[not found] ` <20110412155345.4644e51c-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-13 6:13 ` Michael Lawnick
[not found] ` <4DA53F22.5020105-Mmb7MZpHnFY@public.gmane.org>
2011-04-13 8:39 ` Jean Delvare
[not found] ` <20110413103952.68bdb6fa-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-13 10:06 ` Michael Fuckner [this message]
[not found] ` <4DA575C3.1050100-iWcS09LKDTLR7s880joybQ@public.gmane.org>
2011-04-13 11:45 ` Jean Delvare
2011-04-19 12:24 ` Jean Delvare
2011-04-14 11:42 ` Michael Lawnick
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