i2c-viapro: Add support for the VIA CX700 south bridge

We do not have any documentation for the CX700, but it was reported
to work fine. Thanks to Claas Langbehn for testing.
Signed-off-by: Jean Delvare <khali@linux-fr.org>

Documentation/i2c/busses/i2c-viapro

@@ -13,6 +13,9 @@ Supported adapters:
   * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8251
     Datasheet: available on request and under NDA from VIA
 
+  * VIA Technologies, Inc. CX700
+    Datasheet: available on request and under NDA from VIA
+
 Authors:
 	Kysti Mlkki <kmalkki@cc.hut.fi>,
 	Mark D. Studebaker <mdsxyz123@yahoo.com>,
@@ -44,6 +47,7 @@ Your lspci -n listing must show one of these :
  device 1106:3227   (VT8237R)
  device 1106:3337   (VT8237A)
  device 1106:3287   (VT8251)
+ device 1106:8324   (CX700)
 
 If none of these show up, you should look in the BIOS for settings like
 enable ACPI / SMBus or even USB.
@@ -51,3 +55,6 @@ enable ACPI / SMBus or even USB.
 Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
 VT8231), this driver supports I2C block transactions. Such transactions
 are mainly useful to read from and write to EEPROMs.
+
+The CX700 additionally appears to support SMBus PEC, although this driver
+doesn't implement it yet.

drivers/i2c/busses/Kconfig

@@ -500,11 +500,11 @@ config I2C_VIA
 	  will be called i2c-via.
 
 config I2C_VIAPRO
-	tristate "VIA 82C596/82C686/82xx"
+	tristate "VIA VT82C596/82C686/82xx and CX700"
 	depends on I2C && PCI
 	help
 	  If you say yes to this option, support will be included for the VIA
-	  82C596/82C686/82xx I2C interfaces.  Specifically, the following
+	  VT82C596 and later SMBus interface.  Specifically, the following
 	  chipsets are supported:
 	    VT82C596A/B
 	    VT82C686A/B
@@ -513,6 +513,7 @@ config I2C_VIAPRO
 	    VT8235
 	    VT8237R/A
 	    VT8251
+	    CX700
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-viapro.

drivers/i2c/busses/i2c-viapro.c

@@ -4,7 +4,7 @@
     Copyright (c) 1998 - 2002  Frodo Looijaard <frodol@dds.nl>,
     Philip Edelbrock <phil@netroedge.com>, Kysti Mlkki <kmalkki@cc.hut.fi>,
     Mark D. Studebaker <mdsxyz123@yahoo.com>
-    Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>
+    Copyright (C) 2005 - 2007  Jean Delvare <khali@linux-fr.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -36,6 +36,7 @@
    VT8237R            0x3227             yes
    VT8237A            0x3337             yes
    VT8251             0x3287             yes
+   CX700              0x8324             yes
 
    Note: we assume there can only be one device, with one SMBus interface.
 */
@@ -384,6 +385,7 @@ found:
 	dev_dbg(&pdev->dev, "VT596_smba = 0x%X\n", vt596_smba);
 
 	switch (pdev->device) {
+	case PCI_DEVICE_ID_VIA_CX700:
 	case PCI_DEVICE_ID_VIA_8251:
 	case PCI_DEVICE_ID_VIA_8237:
 	case PCI_DEVICE_ID_VIA_8237A:
@@ -443,6 +445,8 @@ static struct pci_device_id vt596_ids[] = {
 	  .driver_data = SMBBA1 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8251),
 	  .driver_data = SMBBA3 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700),
+	  .driver_data = SMBBA3 },
 	{ 0, }
 };