Index: /i2c/trunk/kernel/i2c.h
===================================================================
--- /i2c/trunk/kernel/i2c.h	(revision 3330)
+++ /i2c/trunk/kernel/i2c.h	(revision 3331)
@@ -459,6 +459,9 @@
 #define I2C_HW_P_ELEK	0x02	/* Elektor ISA Bus inteface card	*/
 
-
-
+/* --- SMBus only adapters						*/
+#define I2C_HW_SMBUS_PIIX4	0x00
+#define I2C_HW_SMBUS_ALI15X3	0x01
+#define I2C_HW_SMBUS_VIA2	0x02
+#define I2C_HW_SMBUS_VOODOO3	0x03
 
 /* ----- I2C-DEV: char device interface stuff ------------------------- */