diff --git a/configs/at91sam9g20ek_2mmc_defconfig b/configs/at91sam9g20ek_2mmc_defconfig
new file mode 100644
index 0000000000..4eef04f179
--- /dev/null
+++ b/configs/at91sam9g20ek_2mmc_defconfig
@@ -0,0 +1,3 @@
+CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,AT91SAM9G20EK_2MMC,SYS_USE_MMC"
+CONFIG_ARM=y
+CONFIG_TARGET_AT91SAM9260EK=y
diff --git a/configs/at91sam9g20ek_mmc_defconfig b/configs/at91sam9g20ek_mmc_defconfig
deleted file mode 100644
index 8cca2e575e..0000000000
--- a/configs/at91sam9g20ek_mmc_defconfig
+++ /dev/null
@@ -1,3 +0,0 @@
-CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,SYS_USE_MMC"
-CONFIG_ARM=y
-CONFIG_TARGET_AT91SAM9260EK=y
diff --git a/include/configs/at91sam9260ek.h b/include/configs/at91sam9260ek.h
index a6a80de88a..c4b2e1666f 100644
--- a/include/configs/at91sam9260ek.h
+++ b/include/configs/at91sam9260ek.h
@@ -90,7 +90,6 @@
 #define CONFIG_CMD_PING		1
 #define CONFIG_CMD_DHCP		1
 #define CONFIG_CMD_NAND		1
-#define CONFIG_CMD_MMC
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_USB		1
 
@@ -133,14 +132,17 @@
 # define CONFIG_MACH_TYPE MACH_TYPE_AT91SAM9260EK
 #endif
 
-/* DataFlash */
 #ifndef CONFIG_AT91SAM9G20EK_2MMC
+/* DataFlash */
 #define CONFIG_ATMEL_DATAFLASH_SPI
 #define CONFIG_HAS_DATAFLASH		1
 #define CONFIG_SYS_MAX_DATAFLASH_BANKS		2
 #define CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0	0xC0000000	/* CS0 */
 #define CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS1	0xD0000000	/* CS1 */
 #define AT91_SPI_CLK			15000000
+#else
+/* Enable MMC. The MCCK is conflicted with DataFlash */
+#define CONFIG_CMD_MMC
 #endif
 
 #ifdef CONFIG_AT91SAM9G20EK