diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index 6c81b6c..dc273b4 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -130,6 +130,37 @@ config MACH_DAVINCI_DA850_EVM
 	help
 	  Say Y here to select the TI DA850/OMAP-L138 Evaluation Module.
 
+config DA850_UI_EXP
+	bool "DA850/OMAP-L138 UI (User Interface) board expander configuration"
+	depends on MACH_DAVINCI_DA850_EVM
+	select GPIO_PCA953X
+	help
+	  Say Y here if you have the DA850/OMAP-L138 UI
+	  (User Interface) board installed and you want to
+	  enable the peripherals located on User Interface
+	  board contorlled by TCA6416 expander.
+
+choice
+	prompt "Select peripherals connected to expander on UI board"
+	depends on DA850_UI_EXP
+
+config DA850_UI_NONE
+	bool "No peripheral is enabled"
+	help
+	  Say Y if you do not want to enable any of the peripherals connected
+	  to TCA6416 expander on DA850/OMAP-L138 EVM UI card
+
+config DA850_UI_RMII
+	bool "RMII Ethernet PHY"
+	help
+	  Say Y if you want to use the RMII PHY on the DA850/OMAP-L138 EVM.
+	  This PHY is found on the UI daughter card that is supplied with
+	  the EVM.
+	  NOTE: Please take care while choosing this option, MII PHY will
+	  not be functional if RMII mode is selected.
+
+endchoice
+
 config DAVINCI_MUX
 	bool "DAVINCI multiplexing support"
 	depends on ARCH_DAVINCI
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 05b2d87..53e434b 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -45,6 +45,8 @@
 #define DA850_MMCSD_CD_PIN		GPIO_TO_PIN(4, 0)
 #define DA850_MMCSD_WP_PIN		GPIO_TO_PIN(4, 1)
 
+#define DA850_MII_MDIO_CLKEN_PIN	GPIO_TO_PIN(2, 6)
+
 static struct mtd_partition da850_evm_norflash_partition[] = {
 	{
 		.name           = "NOR filesystem",
@@ -152,6 +154,7 @@ static void da850_evm_setup_nor_nand(void);
 static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
 						unsigned ngpio, void *c)
 {
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
 	int sel_a, sel_b, sel_c, ret;
 
 	sel_a = gpio + 7;
@@ -186,6 +189,10 @@ static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
 
 	da850_evm_setup_nor_nand();
 
+	if (soc_info->emac_pdata->rmii_en)
+		/* enable RMII */
+		gpio_set_value(sel_a, 0);
+
 	return 0;
 
 exp_setup_selc_fail:
@@ -509,6 +516,58 @@ static const short da850_evm_lcdc_pins[] = {
 	-1
 };
 
+static int __init da850_evm_config_emac(u8 rmii_en)
+{
+	void __iomem *cfg_chip3_base;
+	int ret;
+	u32 val;
+
+	cfg_chip3_base = DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP3_REG);
+
+	/* configure the CFGCHIP3 register for RMII or MII */
+	val = __raw_readl(cfg_chip3_base);
+	if (rmii_en)
+		val |= BIT(8);
+	else
+		val &= ~BIT(8);
+
+	__raw_writel(val, cfg_chip3_base);
+
+	if (!rmii_en)
+		ret = da8xx_pinmux_setup(da850_cpgmac_pins);
+	else
+		ret = da8xx_pinmux_setup(da850_rmii_pins);
+	if (ret)
+		pr_warning("da850_evm_init: cpgmac/rmii mux setup failed: %d\n",
+				ret);
+
+	ret = davinci_cfg_reg(DA850_GPIO2_6);
+	if (ret)
+		pr_warning("da850_evm_init:GPIO(2,6) mux setup "
+							"failed\n");
+
+	ret = gpio_request(DA850_MII_MDIO_CLKEN_PIN, "mdio_clk_en");
+	if (ret) {
+		pr_warning("Cannot open GPIO %d\n",
+					DA850_MII_MDIO_CLKEN_PIN);
+		return ret;
+	}
+
+	if (rmii_en) {
+		/* Disable MII MDIO clock */
+		gpio_direction_output(DA850_MII_MDIO_CLKEN_PIN, 1);
+		pr_info("EMAC: RMII PHY configured, MII PHY will not be"
+							" functional\n");
+	} else {
+		/* Enable MII MDIO clock */
+		gpio_direction_output(DA850_MII_MDIO_CLKEN_PIN, 0);
+		pr_info("EMAC: MII PHY configured, RMII PHY will not be"
+							" functional\n");
+	}
+
+	return 0;
+}
+
 static __init void da850_evm_init(void)
 {
 	struct davinci_soc_info *soc_info = &davinci_soc_info;
@@ -536,12 +595,15 @@ static __init void da850_evm_init(void)
 
 	soc_info->emac_pdata->phy_mask = DA850_EVM_PHY_MASK;
 	soc_info->emac_pdata->mdio_max_freq = DA850_EVM_MDIO_FREQUENCY;
+#ifdef CONFIG_DA850_UI_RMII
+	soc_info->emac_pdata->rmii_en = 1;
+#else
 	soc_info->emac_pdata->rmii_en = 0;
+#endif
 
-	ret = da8xx_pinmux_setup(da850_cpgmac_pins);
+	ret = da850_evm_config_emac(soc_info->emac_pdata->rmii_en);
 	if (ret)
-		pr_warning("da850_evm_init: cpgmac mux setup failed: %d\n",
-				ret);
+		pr_warning("da850_evm_init: emac setup failed: %d\n", ret);
 
 	ret = da8xx_register_emac();
 	if (ret)
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 1d6d8b4..b804d57 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -422,6 +422,14 @@ static const struct mux_config da850_pins[] = {
 	MUX_CFG(DA850, MII_RXD_0,	3,	28,	15,	8,	false)
 	MUX_CFG(DA850, MDIO_CLK,	4,	0,	15,	8,	false)
 	MUX_CFG(DA850, MDIO_D,		4,	4,	15,	8,	false)
+	MUX_CFG(DA850, RMII_TXD_0,	14,	12,	15,	8,	false)
+	MUX_CFG(DA850, RMII_TXD_1,	14,	8,	15,	8,	false)
+	MUX_CFG(DA850, RMII_TXEN,	14,	16,	15,	8,	false)
+	MUX_CFG(DA850, RMII_CRS_DV,	15,	4,	15,	8,	false)
+	MUX_CFG(DA850, RMII_RXD_0,	14,	24,	15,	8,	false)
+	MUX_CFG(DA850, RMII_RXD_1,	14,	20,	15,	8,	false)
+	MUX_CFG(DA850, RMII_RXER,	14,	28,	15,	8,	false)
+	MUX_CFG(DA850, RMII_MHZ_50_CLK,	15,	0,	15,	0,	false)
 	/* McASP function */
 	MUX_CFG(DA850,	ACLKR,		0,	0,	15,	1,	false)
 	MUX_CFG(DA850,	ACLKX,		0,	4,	15,	1,	false)
@@ -524,6 +532,7 @@ static const struct mux_config da850_pins[] = {
 	MUX_CFG(DA850, EMA_WAIT_1,	6,	24,	15,	1,	false)
 	MUX_CFG(DA850, NEMA_CS_2,	7,	0,	15,	1,	false)
 	/* GPIO function */
+	MUX_CFG(DA850, GPIO2_6,		6,	4,	15,	8,	false)
 	MUX_CFG(DA850, GPIO2_8,		5,	28,	15,	8,	false)
 	MUX_CFG(DA850, GPIO2_15,	5,	0,	15,	8,	false)
 	MUX_CFG(DA850, GPIO4_0,		10,	28,	15,	8,	false)
@@ -565,6 +574,14 @@ const short da850_cpgmac_pins[] __initdata = {
 	-1
 };
 
+const short da850_rmii_pins[] __initdata = {
+	DA850_RMII_TXD_0, DA850_RMII_TXD_1, DA850_RMII_TXEN,
+	DA850_RMII_CRS_DV, DA850_RMII_RXD_0, DA850_RMII_RXD_1,
+	DA850_RMII_RXER, DA850_RMII_MHZ_50_CLK, DA850_MDIO_CLK,
+	DA850_MDIO_D,
+	-1
+};
+
 const short da850_mcasp_pins[] __initdata = {
 	DA850_AHCLKX, DA850_ACLKX, DA850_AFSX,
 	DA850_AHCLKR, DA850_ACLKR, DA850_AFSR, DA850_AMUTE,
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 401bf93..b4cf8b1 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -124,6 +124,7 @@ extern const short da850_uart2_pins[];
 extern const short da850_i2c0_pins[];
 extern const short da850_i2c1_pins[];
 extern const short da850_cpgmac_pins[];
+extern const short da850_rmii_pins[];
 extern const short da850_mcasp_pins[];
 extern const short da850_lcdcntl_pins[];
 extern const short da850_mmcsd0_pins[];
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index b2c1ad0..16b8a7f 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/arch/arm/mach-davinci/include/mach/mux.h
@@ -774,6 +774,14 @@ enum davinci_da850_index {
 	DA850_MII_RXD_0,
 	DA850_MDIO_CLK,
 	DA850_MDIO_D,
+	DA850_RMII_TXD_0,
+	DA850_RMII_TXD_1,
+	DA850_RMII_TXEN,
+	DA850_RMII_CRS_DV,
+	DA850_RMII_RXD_0,
+	DA850_RMII_RXD_1,
+	DA850_RMII_RXER,
+	DA850_RMII_MHZ_50_CLK,
 
 	/* McASP function */
 	DA850_ACLKR,
@@ -881,6 +889,7 @@ enum davinci_da850_index {
 	DA850_NEMA_CS_2,
 
 	/* GPIO function */
+	DA850_GPIO2_6,
 	DA850_GPIO2_8,
 	DA850_GPIO2_15,
 	DA850_GPIO4_0,
