diff --git a/board/overo/overo.c b/board/overo/overo.c
index 9c92693..f917e40 100644
--- a/board/overo/overo.c
+++ b/board/overo/overo.c
@@ -40,6 +40,32 @@
 #include <asm/mach-types.h>
 #include "overo.h"
 
+#define TWL4030_I2C_BUS			0
+#define EXPANSION_EEPROM_I2C_BUS	2
+#define EXPANSION_EEPROM_I2C_ADDRESS	0x51
+
+#define GUMSTIX_SUMMIT			0x01000200
+#define GUMSTIX_TOBI			0x02000200
+#define GUMSTIX_TOBI_DUO		0x03000200
+#define GUMSTIX_PALO35			0x04000200
+#define GUMSTIX_PALO43			0x05000200
+#define GUMSTIX_CHESTNUT43		0x06000200
+#define GUMSTIX_PINTO			0x07000200
+#define GUMSTIX_GALLOP43		0x08000200
+
+#define ETTUS_USRP_E			0x01000300
+
+#define GUMSTIX_NO_EEPROM		0xffffffff
+
+static struct {
+	unsigned int device_vendor;
+	unsigned char revision;
+	unsigned char content;
+	char fab_revision[8];
+	char env_var[16];
+	char env_setting[64];
+} expansion_config;
+
 #if defined(CONFIG_CMD_NET)
 static void setup_net_chip(void);
 #endif
@@ -137,6 +163,31 @@ int get_sdio2_config(void)
 }
 
 /*
+ * Routine: get_expansion_id
+ * Description: This function checks for expansion board by checking I2C
+ *		bus 2 for the availability of an AT24C01B serial EEPROM.
+ *		returns the device_vendor field from the EEPROM
+ */
+unsigned int get_expansion_id(void)
+{
+	i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
+
+	/* return GUMSTIX_NO_EEPROM if eeprom doesn't respond */
+	if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
+		i2c_set_bus_num(TWL4030_I2C_BUS);
+		return GUMSTIX_NO_EEPROM;
+	}
+
+	/* read configuration data */
+	i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
+		 sizeof(expansion_config));
+
+	i2c_set_bus_num(TWL4030_I2C_BUS);
+
+	return expansion_config.device_vendor;
+}
+
+/*
  * Routine: misc_init_r
  * Description: Configure board specific parts
  */
@@ -164,6 +215,70 @@ int misc_init_r(void)
 		printf("Unable to detect mmc2 connection type\n");
 	}
 
+	switch (get_expansion_id()) {
+	case GUMSTIX_SUMMIT:
+		printf("Recognized Summit expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "dvi");
+		break;
+	case GUMSTIX_TOBI:
+		printf("Recognized Tobi expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "dvi");
+		break;
+	case GUMSTIX_TOBI_DUO:
+		printf("Recognized Tobi Duo expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		break;
+	case GUMSTIX_PALO35:
+		printf("Recognized Palo35 expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "lcd35");
+		break;
+	case GUMSTIX_PALO43:
+		printf("Recognized Palo43 expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "lcd43");
+		break;
+	case GUMSTIX_CHESTNUT43:
+		printf("Recognized Chestnut43 expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "lcd43");
+		break;
+	case GUMSTIX_PINTO:
+		printf("Recognized Pinto expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		break;
+	case GUMSTIX_GALLOP43:
+		printf("Recognized Gallop43 expansion board (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		setenv("defaultdisplay", "lcd43");
+		break;
+	case ETTUS_USRP_E:
+		printf("Recognized Ettus Research USRP-E (rev %d %s)\n",
+			expansion_config.revision,
+			expansion_config.fab_revision);
+		MUX_USRP_E();
+		setenv("defaultdisplay", "dvi");
+		break;
+	case GUMSTIX_NO_EEPROM:
+		printf("No EEPROM on expansion board\n");
+		break;
+	default:
+		printf("Unrecognized expansion board\n");
+	}
+
+	if (expansion_config.content == 1)
+		setenv(expansion_config.env_var, expansion_config.env_setting);
+
 	dieid_num_r();
 
 	return 0;
diff --git a/board/overo/overo.h b/board/overo/overo.h
index 33a92e4..68e1243 100644
--- a/board/overo/overo.h
+++ b/board/overo/overo.h
@@ -419,4 +419,8 @@ const omap3_sysinfo sysinfo = {
 	MUX_VAL(CP(MMC1_DAT6),		(IEN  | PTU | EN  | M4)) /*GPIO_128*/\
 	MUX_VAL(CP(MMC1_DAT7),		(IEN  | PTU | EN  | M4)) /*GPIO_129*/
 
+#define MUX_USRP_E() \
+	MUX_VAL(CP(MCSPI1_SOMI),	(IEN  | PTD | DIS | M4)) /*GPIO_173 */\
+	MUX_VAL(CP(MCSPI1_CS1),		(IDIS | PTD | EN  | M4)) /*GPIO_175 */\
+
 #endif
diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index 69f9126..29f0aa8 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -120,6 +120,7 @@
 #define CONFIG_SYS_I2C_SLAVE		1
 #define CONFIG_SYS_I2C_BUS		0
 #define CONFIG_SYS_I2C_BUS_SELECT	1
+#define CONFIG_I2C_MULTI_BUS		1
 #define CONFIG_DRIVER_OMAP34XX_I2C	1
 
 /*
