Starting point for a SuperIO port (SMC LPC47B272)

[Chris Love]

I am trying to bring up LinuxBIOS on an x86 CPCI blade here.
Output from lspci is included below.  The one item I've
noticed so far is that the SuperIO device doesn't appear
to be supported in either source tree.  The northbridge,
southbridge, and BIOS flash device (82802AC) appear to be
supported in the freebios tree.

Has anyone dealt with this SuperIO device before?  Are any
of the other SMC superio drivers a good or bad starting point
for a port?  My first step is probably going to be comparing
datasheets between this and some of the other devices, but
other suggestions would be welcome.

Thanks in advance,

Chris

00:00.0 Host bridge: Intel Corp.: Unknown device 254c (rev 01)
00:02.0 PCI bridge: Intel Corp. e7500 [Plumas] HI_B Virtual PCI Bridge 
(F0) (rev 01)
00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #1) (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 42)
00:1f.0 ISA bridge: Intel Corp. 82801CA ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801CA IDE U100 (rev 02)
00:1f.3 SMBus: Intel Corp. 82801CA/CAM SMBus (rev 02)
01:01.0 SCSI storage controller: LSI Logic / Symbios Logic 53c896 (rev 07)
01:01.1 SCSI storage controller: LSI Logic / Symbios Logic 53c896 (rev 07)
01:02.0 Ethernet controller: Intel Corp. 82559ER (rev 09)
01:03.0 Ethernet controller: Intel Corp. 82559ER (rev 09)
01:05.0 Serial controller: Exar Corp.: Unknown device 0154 (rev 03)
01:08.0 Ethernet controller: Intel Corp. 82801CAM (ICH3) PRO/100 VE 
(LOM) Ethernet Controller (rev 42)
02:1c.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 04)
02:1d.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 04)
02:1e.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 04)
02:1f.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 04)
03:01.0 PCI bridge: Intel Corp. 21154 PCI-to-PCI Bridge
03:02.0 VGA compatible controller: Silicon Motion, Inc. SM710 LynxEM 
(rev a3)
05:01.0 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet 
Controller (Copper) (rev 01)
05:01.1 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet 
Controller (Copper) (rev 01)