[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>

4 files changed, 15 insertions, 1 deletions

diff --git a/Documentation/i2c/busses/i2c-piix4 b/Documentation/i2c/busses/i2c-piix4
index a1c8f581afed..6e6c905143a1 100644
--- a/Documentation/i2c/busses/i2c-piix4
+++ b/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
 
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index d6d44946a283..e3450d16d8a4 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/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
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index d9c7c00e71f9..5f06e81a2087 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/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),
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index bcfe9d4f56ae..489af9d3ce1f 100644
--- a/include/linux/pci_ids.h
+++ b/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