Index: sys/compat/linuxkpi/common/include/linux/mod_devicetable.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/mod_devicetable.h
+++ sys/compat/linuxkpi/common/include/linux/mod_devicetable.h
@@ -70,4 +70,7 @@
 #define DMI_MATCH(a, b) { .slot = a, .substr = b }
 #define DMI_EXACT_MATCH(a, b)   { .slot = a, .substr = b, .exact_match = 1 }
 
+#define	I2C_NAME_SIZE		20
+#define	I2C_MODULE_PREFIX	"i2c:"
+
 #endif	/* __LINUXKPI_LINUX_MOD_DEVICETABLE_H__ */