[PATCH] i2c-piix4: Add ATI IXP200/300/400 support

This patch adds the ATI IXP southbridges support to i2c-piix4,
as it turned out those chips are compatible with it.
Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/i2c/busses/i2c-piix4

@@ -6,6 +6,8 @@ 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
+    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

@@ -163,7 +163,7 @@ config I2C_PXA_SLAVE
 	  I2C bus.
 
 config I2C_PIIX4
-	tristate "Intel PIIX4"
+	tristate "Intel PIIX4 and compatible (ATI/Serverworks/Broadcom/SMSC)"
 	depends on I2C && PCI
 	help
 	  If you say yes to this option, support will be included for the Intel
@@ -172,6 +172,9 @@ config I2C_PIIX4
 	  of Broadcom):
 	    Intel PIIX4
 	    Intel 440MX
+	    ATI IXP200
+	    ATI IXP300
+	    ATI IXP400
 	    Serverworks OSB4
 	    Serverworks CSB5
 	    Serverworks CSB6

drivers/i2c/busses/i2c-piix4.c

@@ -413,6 +413,12 @@ static struct i2c_adapter piix4_adapter = {
 static struct pci_device_id piix4_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3),
 	  .driver_data = 3 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_SMBUS),
+	  .driver_data = 0 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_SMBUS),
+	  .driver_data = 0 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_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

@@ -352,8 +352,11 @@
 #define PCI_DEVICE_ID_ATI_RS480         0x5950
 /* ATI IXP Chipset */
 #define PCI_DEVICE_ID_ATI_IXP200_IDE	0x4349
+#define PCI_DEVICE_ID_ATI_IXP200_SMBUS	0x4353
+#define PCI_DEVICE_ID_ATI_IXP300_SMBUS	0x4363
 #define PCI_DEVICE_ID_ATI_IXP300_IDE	0x4369
 #define PCI_DEVICE_ID_ATI_IXP300_SATA   0x436e
+#define PCI_DEVICE_ID_ATI_IXP400_SMBUS	0x4372
 #define PCI_DEVICE_ID_ATI_IXP400_IDE	0x4376
 #define PCI_DEVICE_ID_ATI_IXP400_SATA   0x4379
 #define PCI_DEVICE_ID_ATI_IXP400_SATA2	0x437a