[Driver SC1100 Watchdog] device taken by some other driver, but which one?

[thefly at acaro.org]

I finally built my driver for Geode's SC1100 Watchdog, but i got a bad news. 
My probe() function gets called just one time, and for the wrong device. 
with an pciconf -lv i get:
chip0 at pci0:0:0:	class=0x060000 card=0x00000000 chip=0x00011078 rev=0x00 
hdr=0x00
   vendor   = 'Cyrix Corp (Now owned by VIA)'
   device   = 'MediaGXm MMX Cyrix Integrated CPU'
   class    = bridge
   subclass = HOST-PCI
sis0 at pci0:6:0:	class=0x020000 card=0x0020100b chip=0x0020100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   device   = 'DP83815/16 MacPhyter 10/100 Mb/s Ethernet MAC & PHY'
   class    = network
   subclass = ethernet
sis1 at pci0:7:0:	class=0x020000 card=0x0020100b chip=0x0020100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   device   = 'DP83815/16 MacPhyter 10/100 Mb/s Ethernet MAC & PHY'
   class    = network
   subclass = ethernet
sis2 at pci0:8:0:	class=0x020000 card=0x0020100b chip=0x0020100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   device   = 'DP83815/16 MacPhyter 10/100 Mb/s Ethernet MAC & PHY'
   class    = network
   subclass = ethernet
hifn0 at pci0:14:0:	class=0x0b4000 card=0x00000000 chip=0x001213a3 rev=0x01 
hdr=0x00
   vendor   = 'HI-FN Inc.'
   device   = '7951 Security Processor'
   class    = processor
isab0 at pci0:18:0:	class=0x060100 card=0x0500100b chip=0x0510100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   class    = bridge
   subclass = PCI-ISA
chip1 at pci0:18:1:	class=0x068000 card=0x0501100b chip=0x0511100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   class    = bridge
   subclass = PCI-unknown
atapci0 at pci0:18:2:	class=0x010180 card=0x0502100b chip=0x0502100b rev=0x01 
hdr=0x00
   vendor   = 'National Semiconductor'
   device   = 'SCx200 IDE'
   class    = mass storage
   subclass = ATA
chip2 at pci0:18:5:	class=0x068000 card=0x0505100b chip=0x0515100b rev=0x00 
hdr=0x00
   vendor   = 'National Semiconductor'
   class    = bridge
   subclass = PCI-unknown
none0 at pci0:19:0:	class=0x0c0310 card=0xa0f80e11 chip=0xa0f80e11 rev=0x08 
hdr=0x00
   vendor   = 'Compaq Computer Corp (Now owned by Hewlett-Packard)'
   device   = 'ZFMicro USB Open Host Controller'
   class    = serial bus
   subclass = USB 

and the probe() 's called for a0f8 0e11 which is the USB serial bus. My 
device is the 515 100b which is that PCI-unknown taken by chip2. What's 
wrong?
FreeBSD mu1-04 4.8-RELEASE FreeBSD 4.8-RELEASE #1: Tue Sep 16 17:04:58 GMT 
2003     root@:/usr/src/sys/compile/NET4801  i386 


TIA 

Claudio Martella