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-rw-r--r--include/i2c.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h
index 54c6f9fbc6..d31c72d247 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -56,6 +56,14 @@
#define I2C_SET_BUS(a)
#endif
+/* 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
+
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.