Centrino (855PM, ICH4-M): 82801DBM w/o LPC Bridge/SMBus?

Axel Thimm Axel.Thimm at ATrpms.net
Mon Apr 12 18:00:27 CEST 2004


On Mon, Apr 12, 2004 at 05:25:03PM +0200, Axel Thimm wrote:
> I've been trying to get the readings off a Centrino notebook (a
> Toshiba Satelite M30).
> The sensor relevant pci entries (24c3/24c0) are missing:
> # lspci -n
> [...]
> 00:1f.0 Class 0601: 8086:24cc (rev 03)
> [...]
> # lspci
> [...]
> 00:1f.0 ISA bridge: Intel Corp. 82801DBM LPC Interface Controller (rev 03)
> [...]

OK, so I was blind. The LPC I/C has moved from 24c0 (801DB) to 24cc
(82801DBM). I checked the specs at Intel and found that my SMBus is
disabled wrt to the PCI configuration space, but the I/O space is
accessible, e.g. the SMBus is there but hidden ...

What is the best way to proceed? I found a module that deals with a
similar problem for the DB on ASUS P4B. Should this be dealt with the
same way? Then I could add 82801DBM support into i2c-i801.c and
Axel.Thimm at ATrpms.net
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