+/* define the I2C bus number for RTC and DTT if not already done */
+#if !defined(CFG_RTC_BUS_NUM)
+#define CFG_RTC_BUS_NUM 0
+#endif
+#if !defined(CFG_DTT_BUS_NUM)
+#define CFG_DTT_BUS_NUM 0
+#endif
+#if !defined(CFG_SPD_BUS_NUM)
+#define CFG_SPD_BUS_NUM 0
+#endif
+