i2c-piix4: Add support for the ATI SB600

Add support for the ATI SB600 SMBus controller.
Signed-off-by: Jean Delvare <khali@linux-fr.org>

Documentation/i2c/busses/i2c-piix4

@@ -6,7 +6,7 @@ Supported adapters:
     Datasheet: Publicly available at the Intel website
   * ServerWorks OSB4, CSB5, CSB6 and HT-1000 southbridges
     Datasheet: Only available via NDA from ServerWorks
-  * ATI IXP southbridges IXP200, IXP300, IXP400
+  * ATI IXP200, IXP300, IXP400 and SB600 southbridges
     Datasheet: Not publicly available
   * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge
     Datasheet: Publicly available at the SMSC website http://www.smsc.com

drivers/i2c/busses/Kconfig

@@ -183,6 +183,7 @@ config I2C_PIIX4
 	    ATI IXP200
 	    ATI IXP300
 	    ATI IXP400
+	    ATI SB600
 	    Serverworks OSB4
 	    Serverworks CSB5
 	    Serverworks CSB6

drivers/i2c/busses/i2c-piix4.c

@@ -23,6 +23,7 @@
    Supports:
 	Intel PIIX4, 440MX
 	Serverworks OSB4, CSB5, CSB6, HT-1000
+	ATI IXP200, IXP300, IXP400, SB600
 	SMSC Victory66
 
    Note: we assume there can only be one device, with one SMBus interface.
@@ -396,6 +397,8 @@ static struct pci_device_id piix4_ids[] = {
 	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS),
 	  .driver_data = 0 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_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),

include/linux/pci_ids.h

@@ -369,6 +369,7 @@
 #define PCI_DEVICE_ID_ATI_IXP400_SATA2	0x437a
 #define PCI_DEVICE_ID_ATI_IXP600_SATA	0x4380
 #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_VENDOR_ID_VLSI		0x1004