[PATCH] I2C: i2c-piix4: Add Broadcom HT-1000 support

Add Broadcom HT-1000 south bridge's PCI ID to i2c-piix driver. Note
that at least on Supermicro H8SSL it uses non-standard SMBHSTCFG = 3
and standard values like 0 or 9 causes hangup.

Signed-off-by: Martin Devera <devik@cdi.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/i2c/busses/i2c-piix4

@@ -4,7 +4,7 @@ Supported adapters:
   * Intel 82371AB PIIX4 and PIIX4E
   * Intel 82443MX (440MX)
     Datasheet: Publicly available at the Intel website
-  * ServerWorks OSB4, CSB5 and CSB6 southbridges
+  * ServerWorks OSB4, CSB5, CSB6 and HT-1000 southbridges
     Datasheet: Only available via NDA from ServerWorks
   * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge
     Datasheet: Publicly available at the SMSC website http://www.smsc.com

drivers/i2c/busses/Kconfig

@@ -168,12 +168,14 @@ config I2C_PIIX4
 	help
 	  If you say yes to this option, support will be included for the Intel
 	  PIIX4 family of mainboard I2C interfaces.  Specifically, the following
-	  versions of the chipset are supported:
+	  versions of the chipset are supported (note that Serverworks is part
+	  of Broadcom):
 	    Intel PIIX4
 	    Intel 440MX
 	    Serverworks OSB4
 	    Serverworks CSB5
 	    Serverworks CSB6
+	    Serverworks HT-1000
 	    SMSC Victory66
 
 	  This driver can also be built as a module.  If so, the module

drivers/i2c/busses/i2c-piix4.c

@@ -22,7 +22,7 @@
 /*
    Supports:
 	Intel PIIX4, 440MX
-	Serverworks OSB4, CSB5, CSB6
+	Serverworks OSB4, CSB5, CSB6, HT-1000
 	SMSC Victory66
 
    Note: we assume there can only be one device, with one SMBus interface.
@@ -419,6 +419,8 @@ static struct pci_device_id piix4_ids[] = {
 	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6),
 	  .driver_data = 0 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB),
+	  .driver_data = 0 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3),
 	  .driver_data = 3 },
 	{ PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_3),

include/linux/pci_ids.h

@@ -1371,6 +1371,7 @@
 #define PCI_DEVICE_ID_SERVERWORKS_OSB4	  0x0200
 #define PCI_DEVICE_ID_SERVERWORKS_CSB5	  0x0201
 #define PCI_DEVICE_ID_SERVERWORKS_CSB6    0x0203
+#define PCI_DEVICE_ID_SERVERWORKS_HT1000SB 0x0205
 #define PCI_DEVICE_ID_SERVERWORKS_OSB4IDE 0x0211
 #define PCI_DEVICE_ID_SERVERWORKS_CSB5IDE 0x0212
 #define PCI_DEVICE_ID_SERVERWORKS_CSB6IDE 0x0213