diff -Nur linux-2.6.21.1.orig/Documentation/i2c/busses/i2c-piix4 linux-2.6.21.1/Documentation/i2c/busses/i2c-piix4
--- linux-2.6.21.1.orig/Documentation/i2c/busses/i2c-piix4	2007-05-16 13:27:42.733511000 +0800
+++ linux-2.6.21.1/Documentation/i2c/busses/i2c-piix4	2007-05-18 11:07:52.999905200 +0800
@@ -6,7 +6,7 @@
     Datasheet: Publicly available at the Intel website
   * ServerWorks OSB4, CSB5, CSB6 and HT-1000 southbridges
     Datasheet: Only available via NDA from ServerWorks
-  * ATI IXP200, IXP300, IXP400 and SB600 southbridges
+  * ATI IXP200, IXP300, IXP400, SB600 and SB700 southbridges
     Datasheet: Not publicly available
   * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge
     Datasheet: Publicly available at the SMSC website http://www.smsc.com


diff -Nur linux-2.6.21.1.orig/include/linux/pci_ids.h linux-2.6.21.1/include/linux/pci_ids.h
--- linux-2.6.21.1.orig/include/linux/pci_ids.h	2007-05-16 13:28:54.405386000 +0800
+++ linux-2.6.21.1/include/linux/pci_ids.h	2007-05-16 13:45:29.936636000 +0800
@@ -371,6 +371,9 @@
 #define PCI_DEVICE_ID_ATI_IXP600_SRAID	0x4381
 #define PCI_DEVICE_ID_ATI_IXP600_SMBUS	0x4385
 #define PCI_DEVICE_ID_ATI_IXP600_IDE	0x438c
+#define PCI_DEVICE_ID_ATI_IXP700_SMBUS	0x4395
 
 #define PCI_VENDOR_ID_VLSI		0x1004
 #define PCI_DEVICE_ID_VLSI_82C592	0x0005


diff -Nur linux-2.6.21.1.orig/drivers/i2c/busses/i2c-piix4.c linux-2.6.21.1/drivers/i2c/busses/i2c-piix4.c
--- linux-2.6.21.1.orig/drivers/i2c/busses/i2c-piix4.c	2007-05-16 13:27:53.014761000 +0800
+++ linux-2.6.21.1/drivers/i2c/busses/i2c-piix4.c	2007-05-16 13:40:21.546011000 +0800
@@ -23,7 +23,7 @@
    Supports:
 	Intel PIIX4, 440MX
 	Serverworks OSB4, CSB5, CSB6, HT-1000
-	ATI IXP200, IXP300, IXP400, SB600
+	ATI IXP200, IXP300, IXP400, SB600, SB700
 	SMSC Victory66
 
    Note: we assume there can only be one device, with one SMBus interface.
@@ -399,6 +399,8 @@
 	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SMBUS),
 	  .driver_data = 0 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_SMBUS),
+	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4),
 	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5),