diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index b7140f9e9cc6d13e3fa68ee84dc3c1d4bd8a2046..ecd4f4dce5721196f16bdaad407c331f0d297c57 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -311,6 +311,11 @@
 #define MAC_HWF0R			0x011c
 #define MAC_HWF1R			0x0120
 #define MAC_HWF2R			0x0124
+#define MAC_MDIOSCAR			0x0200
+#define MAC_MDIOSCCDR			0x0204
+#define MAC_MDIOISR			0x0214
+#define MAC_MDIOIER			0x0218
+#define MAC_MDIOCL22R			0x0220
 #define MAC_GPIOCR			0x0278
 #define MAC_GPIOSR			0x027c
 #define MAC_MACA0HR			0x0300
@@ -411,10 +416,34 @@
 #define MAC_ISR_MMCTXIS_WIDTH		1
 #define MAC_ISR_PMTIS_INDEX		4
 #define MAC_ISR_PMTIS_WIDTH		1
+#define MAC_ISR_SMI_INDEX		1
+#define MAC_ISR_SMI_WIDTH		1
 #define MAC_ISR_TSIS_INDEX		12
 #define MAC_ISR_TSIS_WIDTH		1
 #define MAC_MACA1HR_AE_INDEX		31
 #define MAC_MACA1HR_AE_WIDTH		1
+#define MAC_MDIOIER_SNGLCOMPIE_INDEX	12
+#define MAC_MDIOIER_SNGLCOMPIE_WIDTH	1
+#define MAC_MDIOISR_SNGLCOMPINT_INDEX	12
+#define MAC_MDIOISR_SNGLCOMPINT_WIDTH	1
+#define MAC_MDIOSCAR_DA_INDEX		21
+#define MAC_MDIOSCAR_DA_WIDTH		5
+#define MAC_MDIOSCAR_PA_INDEX		16
+#define MAC_MDIOSCAR_PA_WIDTH		5
+#define MAC_MDIOSCAR_RA_INDEX		0
+#define MAC_MDIOSCAR_RA_WIDTH		16
+#define MAC_MDIOSCAR_REG_INDEX		0
+#define MAC_MDIOSCAR_REG_WIDTH		21
+#define MAC_MDIOSCCDR_BUSY_INDEX	22
+#define MAC_MDIOSCCDR_BUSY_WIDTH	1
+#define MAC_MDIOSCCDR_CMD_INDEX		16
+#define MAC_MDIOSCCDR_CMD_WIDTH		2
+#define MAC_MDIOSCCDR_CR_INDEX		19
+#define MAC_MDIOSCCDR_CR_WIDTH		3
+#define MAC_MDIOSCCDR_DATA_INDEX	0
+#define MAC_MDIOSCCDR_DATA_WIDTH	16
+#define MAC_MDIOSCCDR_SADDR_INDEX	18
+#define MAC_MDIOSCCDR_SADDR_WIDTH	1
 #define MAC_PFR_HMC_INDEX		2
 #define MAC_PFR_HMC_WIDTH		1
 #define MAC_PFR_HPF_INDEX		10
@@ -1019,6 +1048,14 @@
 #define XP_PROP_3_GPIO_TX_FAULT_WIDTH		4
 #define XP_PROP_3_GPIO_ADDR_INDEX		8
 #define XP_PROP_3_GPIO_ADDR_WIDTH		3
+#define XP_PROP_3_MDIO_RESET_INDEX		0
+#define XP_PROP_3_MDIO_RESET_WIDTH		2
+#define XP_PROP_3_MDIO_RESET_I2C_ADDR_INDEX	8
+#define XP_PROP_3_MDIO_RESET_I2C_ADDR_WIDTH	3
+#define XP_PROP_3_MDIO_RESET_I2C_GPIO_INDEX	12
+#define XP_PROP_3_MDIO_RESET_I2C_GPIO_WIDTH	4
+#define XP_PROP_3_MDIO_RESET_INT_GPIO_INDEX	4
+#define XP_PROP_3_MDIO_RESET_INT_GPIO_WIDTH	2
 #define XP_PROP_4_MUX_ADDR_HI_INDEX		8
 #define XP_PROP_4_MUX_ADDR_HI_WIDTH		5
 #define XP_PROP_4_MUX_ADDR_LO_INDEX		0
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index 78a2063029daabd5352216299f01ad2b01ffec57..30056e24e1fc9895c25cff8bc5008b5b44966550 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -722,6 +722,9 @@ static void xgbe_enable_mac_interrupts(struct xgbe_prv_data *pdata)
 	/* Enable all counter interrupts */
 	XGMAC_IOWRITE_BITS(pdata, MMC_RIER, ALL_INTERRUPTS, 0xffffffff);
 	XGMAC_IOWRITE_BITS(pdata, MMC_TIER, ALL_INTERRUPTS, 0xffffffff);
+
+	/* Enable MDIO single command completion interrupt */
+	XGMAC_IOWRITE_BITS(pdata, MAC_MDIOIER, SNGLCOMPIE, 1);
 }
 
 static void xgbe_enable_ecc_interrupts(struct xgbe_prv_data *pdata)
@@ -1092,6 +1095,36 @@ static int xgbe_config_rx_mode(struct xgbe_prv_data *pdata)
 	return 0;
 }
 
+static int xgbe_clr_gpio(struct xgbe_prv_data *pdata, unsigned int gpio)
+{
+	unsigned int reg;
+
+	if (gpio > 16)
+		return -EINVAL;
+
+	reg = XGMAC_IOREAD(pdata, MAC_GPIOSR);
+
+	reg &= ~(1 << (gpio + 16));
+	XGMAC_IOWRITE(pdata, MAC_GPIOSR, reg);
+
+	return 0;
+}
+
+static int xgbe_set_gpio(struct xgbe_prv_data *pdata, unsigned int gpio)
+{
+	unsigned int reg;
+
+	if (gpio > 16)
+		return -EINVAL;
+
+	reg = XGMAC_IOREAD(pdata, MAC_GPIOSR);
+
+	reg |= (1 << (gpio + 16));
+	XGMAC_IOWRITE(pdata, MAC_GPIOSR, reg);
+
+	return 0;
+}
+
 static int xgbe_read_mmd_regs_v2(struct xgbe_prv_data *pdata, int prtad,
 				 int mmd_reg)
 {
@@ -1236,6 +1269,79 @@ static void xgbe_write_mmd_regs(struct xgbe_prv_data *pdata, int prtad,
 	}
 }
 
+static int xgbe_write_ext_mii_regs(struct xgbe_prv_data *pdata, int addr,
+				   int reg, u16 val)
+{
+	unsigned int mdio_sca, mdio_sccd;
+
+	reinit_completion(&pdata->mdio_complete);
+
+	mdio_sca = 0;
+	XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, REG, reg);
+	XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, DA, addr);
+	XGMAC_IOWRITE(pdata, MAC_MDIOSCAR, mdio_sca);
+
+	mdio_sccd = 0;
+	XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, DATA, val);
+	XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, CMD, 1);
+	XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, BUSY, 1);
+	XGMAC_IOWRITE(pdata, MAC_MDIOSCCDR, mdio_sccd);
+
+	if (!wait_for_completion_timeout(&pdata->mdio_complete, HZ)) {
+		netdev_err(pdata->netdev, "mdio write operation timed out\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int xgbe_read_ext_mii_regs(struct xgbe_prv_data *pdata, int addr,
+				  int reg)
+{
+	unsigned int mdio_sca, mdio_sccd;
+
+	reinit_completion(&pdata->mdio_complete);
+
+	mdio_sca = 0;
+	XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, REG, reg);
+	XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, DA, addr);
+	XGMAC_IOWRITE(pdata, MAC_MDIOSCAR, mdio_sca);
+
+	mdio_sccd = 0;
+	XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, CMD, 3);
+	XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, BUSY, 1);
+	XGMAC_IOWRITE(pdata, MAC_MDIOSCCDR, mdio_sccd);
+
+	if (!wait_for_completion_timeout(&pdata->mdio_complete, HZ)) {
+		netdev_err(pdata->netdev, "mdio read operation timed out\n");
+		return -ETIMEDOUT;
+	}
+
+	return XGMAC_IOREAD_BITS(pdata, MAC_MDIOSCCDR, DATA);
+}
+
+static int xgbe_set_ext_mii_mode(struct xgbe_prv_data *pdata, unsigned int port,
+				 enum xgbe_mdio_mode mode)
+{
+	unsigned int reg_val = 0;
+
+	switch (mode) {
+	case XGBE_MDIO_MODE_CL22:
+		if (port > XGMAC_MAX_C22_PORT)
+			return -EINVAL;
+		reg_val |= (1 << port);
+		break;
+	case XGBE_MDIO_MODE_CL45:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	XGMAC_IOWRITE(pdata, MAC_MDIOCL22R, reg_val);
+
+	return 0;
+}
+
 static int xgbe_tx_complete(struct xgbe_ring_desc *rdesc)
 {
 	return !XGMAC_GET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN);
@@ -3386,6 +3492,13 @@ void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *hw_if)
 
 	hw_if->set_speed = xgbe_set_speed;
 
+	hw_if->set_ext_mii_mode = xgbe_set_ext_mii_mode;
+	hw_if->read_ext_mii_regs = xgbe_read_ext_mii_regs;
+	hw_if->write_ext_mii_regs = xgbe_write_ext_mii_regs;
+
+	hw_if->set_gpio = xgbe_set_gpio;
+	hw_if->clr_gpio = xgbe_clr_gpio;
+
 	hw_if->enable_tx = xgbe_enable_tx;
 	hw_if->disable_tx = xgbe_disable_tx;
 	hw_if->enable_rx = xgbe_enable_rx;
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 7af358f5a39f21f2dc459924982e62dd92d31169..155190db682d29a6a97b2267550954fb4eba639d 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -443,7 +443,7 @@ static irqreturn_t xgbe_isr(int irq, void *data)
 	struct xgbe_hw_if *hw_if = &pdata->hw_if;
 	struct xgbe_channel *channel;
 	unsigned int dma_isr, dma_ch_isr;
-	unsigned int mac_isr, mac_tssr;
+	unsigned int mac_isr, mac_tssr, mac_mdioisr;
 	unsigned int i;
 
 	/* The DMA interrupt status register also reports MAC and MTL
@@ -503,6 +503,9 @@ static irqreturn_t xgbe_isr(int irq, void *data)
 	if (XGMAC_GET_BITS(dma_isr, DMA_ISR, MACIS)) {
 		mac_isr = XGMAC_IOREAD(pdata, MAC_ISR);
 
+		netif_dbg(pdata, intr, pdata->netdev, "MAC_ISR=%#010x\n",
+			  mac_isr);
+
 		if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCTXIS))
 			hw_if->tx_mmc_int(pdata);
 
@@ -512,6 +515,9 @@ static irqreturn_t xgbe_isr(int irq, void *data)
 		if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) {
 			mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR);
 
+			netif_dbg(pdata, intr, pdata->netdev,
+				  "MAC_TSSR=%#010x\n", mac_tssr);
+
 			if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) {
 				/* Read Tx Timestamp to clear interrupt */
 				pdata->tx_tstamp =
@@ -520,6 +526,17 @@ static irqreturn_t xgbe_isr(int irq, void *data)
 					   &pdata->tx_tstamp_work);
 			}
 		}
+
+		if (XGMAC_GET_BITS(mac_isr, MAC_ISR, SMI)) {
+			mac_mdioisr = XGMAC_IOREAD(pdata, MAC_MDIOISR);
+
+			netif_dbg(pdata, intr, pdata->netdev,
+				  "MAC_MDIOISR=%#010x\n", mac_mdioisr);
+
+			if (XGMAC_GET_BITS(mac_mdioisr, MAC_MDIOISR,
+					   SNGLCOMPINT))
+				complete(&pdata->mdio_complete);
+		}
 	}
 
 	/* If there is not a separate AN irq, handle it here */
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index 385b7f6052007491a64c21858035ecb101b68092..b87a89988ffd60979a4b19508911f7910e1b3bbb 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -189,6 +189,7 @@ struct xgbe_prv_data *xgbe_alloc_pdata(struct device *dev)
 	spin_lock_init(&pdata->tstamp_lock);
 	mutex_init(&pdata->i2c_mutex);
 	init_completion(&pdata->i2c_complete);
+	init_completion(&pdata->mdio_complete);
 
 	pdata->msg_enable = netif_msg_init(debug, default_msg_level);
 
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index 5d8cd8ba7838fa92c7577a59407f843f0b6a136c..9848f741f44f29862b78645428c45583be08efeb 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -269,6 +269,14 @@ struct xgbe_sfp_ascii {
 	} u;
 };
 
+/* MDIO PHY reset types */
+enum xgbe_mdio_reset {
+	XGBE_MDIO_RESET_NONE = 0,
+	XGBE_MDIO_RESET_I2C_GPIO,
+	XGBE_MDIO_RESET_INT_GPIO,
+	XGBE_MDIO_RESET_MAX,
+};
+
 /* PHY related configuration information */
 struct xgbe_phy_data {
 	enum xgbe_port_mode port_mode;
@@ -316,6 +324,9 @@ struct xgbe_phy_data {
 	enum xgbe_mdio_mode phydev_mode;
 	struct mii_bus *mii;
 	struct phy_device *phydev;
+	enum xgbe_mdio_reset mdio_reset;
+	unsigned int mdio_reset_addr;
+	unsigned int mdio_reset_gpio;
 };
 
 /* I2C, MDIO and GPIO lines are muxed, so only one device at a time */
@@ -486,6 +497,22 @@ static int xgbe_phy_get_comm_ownership(struct xgbe_prv_data *pdata)
 	return -ETIMEDOUT;
 }
 
+static int xgbe_phy_mdio_mii_write(struct xgbe_prv_data *pdata, int addr,
+				   int reg, u16 val)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+
+	if (reg & MII_ADDR_C45) {
+		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL45)
+			return -ENOTSUPP;
+	} else {
+		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL22)
+			return -ENOTSUPP;
+	}
+
+	return pdata->hw_if.write_ext_mii_regs(pdata, addr, reg, val);
+}
+
 static int xgbe_phy_i2c_mii_write(struct xgbe_prv_data *pdata, int reg, u16 val)
 {
 	__be16 *mii_val;
@@ -520,6 +547,8 @@ static int xgbe_phy_mii_write(struct mii_bus *mii, int addr, int reg, u16 val)
 
 	if (phy_data->conn_type == XGBE_CONN_TYPE_SFP)
 		ret = xgbe_phy_i2c_mii_write(pdata, reg, val);
+	else if (phy_data->conn_type & XGBE_CONN_TYPE_MDIO)
+		ret = xgbe_phy_mdio_mii_write(pdata, addr, reg, val);
 	else
 		ret = -ENOTSUPP;
 
@@ -528,6 +557,22 @@ static int xgbe_phy_mii_write(struct mii_bus *mii, int addr, int reg, u16 val)
 	return ret;
 }
 
+static int xgbe_phy_mdio_mii_read(struct xgbe_prv_data *pdata, int addr,
+				  int reg)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+
+	if (reg & MII_ADDR_C45) {
+		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL45)
+			return -ENOTSUPP;
+	} else {
+		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL22)
+			return -ENOTSUPP;
+	}
+
+	return pdata->hw_if.read_ext_mii_regs(pdata, addr, reg);
+}
+
 static int xgbe_phy_i2c_mii_read(struct xgbe_prv_data *pdata, int reg)
 {
 	__be16 mii_val;
@@ -562,6 +607,8 @@ static int xgbe_phy_mii_read(struct mii_bus *mii, int addr, int reg)
 
 	if (phy_data->conn_type == XGBE_CONN_TYPE_SFP)
 		ret = xgbe_phy_i2c_mii_read(pdata, reg);
+	else if (phy_data->conn_type & XGBE_CONN_TYPE_MDIO)
+		ret = xgbe_phy_mdio_mii_read(pdata, addr, reg);
 	else
 		ret = -ENOTSUPP;
 
@@ -1323,9 +1370,13 @@ static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return XGBE_AN_MODE_NONE;
 	case XGBE_PORT_MODE_1000BASE_T:
+		return XGBE_AN_MODE_CL37_SGMII;
 	case XGBE_PORT_MODE_1000BASE_X:
+		return XGBE_AN_MODE_CL37;
 	case XGBE_PORT_MODE_NBASE_T:
+		return XGBE_AN_MODE_CL37_SGMII;
 	case XGBE_PORT_MODE_10GBASE_T:
+		return XGBE_AN_MODE_CL73;
 	case XGBE_PORT_MODE_10GBASE_R:
 		return XGBE_AN_MODE_NONE;
 	case XGBE_PORT_MODE_SFP:
@@ -1587,6 +1638,24 @@ static enum xgbe_mode xgbe_phy_cur_mode(struct xgbe_prv_data *pdata)
 	return phy_data->cur_mode;
 }
 
+static enum xgbe_mode xgbe_phy_switch_baset_mode(struct xgbe_prv_data *pdata)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+
+	/* No switching if not 10GBase-T */
+	if (phy_data->port_mode != XGBE_PORT_MODE_10GBASE_T)
+		return xgbe_phy_cur_mode(pdata);
+
+	switch (xgbe_phy_cur_mode(pdata)) {
+	case XGBE_MODE_SGMII_100:
+	case XGBE_MODE_SGMII_1000:
+		return XGBE_MODE_KR;
+	case XGBE_MODE_KR:
+	default:
+		return XGBE_MODE_SGMII_1000;
+	}
+}
+
 static enum xgbe_mode xgbe_phy_switch_bp_2500_mode(struct xgbe_prv_data *pdata)
 {
 	return XGBE_MODE_KX_2500;
@@ -1614,11 +1683,11 @@ static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_switch_bp_2500_mode(pdata);
 	case XGBE_PORT_MODE_1000BASE_T:
-	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_NBASE_T:
 	case XGBE_PORT_MODE_10GBASE_T:
+		return xgbe_phy_switch_baset_mode(pdata);
+	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_10GBASE_R:
-		return XGBE_MODE_UNKNOWN;
 	case XGBE_PORT_MODE_SFP:
 		/* No switching, so just return current mode */
 		return xgbe_phy_cur_mode(pdata);
@@ -1627,6 +1696,34 @@ static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
 	}
 }
 
+static enum xgbe_mode xgbe_phy_get_basex_mode(struct xgbe_phy_data *phy_data,
+					      int speed)
+{
+	switch (speed) {
+	case SPEED_1000:
+		return XGBE_MODE_X;
+	case SPEED_10000:
+		return XGBE_MODE_KR;
+	default:
+		return XGBE_MODE_UNKNOWN;
+	}
+}
+
+static enum xgbe_mode xgbe_phy_get_baset_mode(struct xgbe_phy_data *phy_data,
+					      int speed)
+{
+	switch (speed) {
+	case SPEED_100:
+		return XGBE_MODE_SGMII_100;
+	case SPEED_1000:
+		return XGBE_MODE_SGMII_1000;
+	case SPEED_10000:
+		return XGBE_MODE_KR;
+	default:
+		return XGBE_MODE_UNKNOWN;
+	}
+}
+
 static enum xgbe_mode xgbe_phy_get_sfp_mode(struct xgbe_phy_data *phy_data,
 					    int speed)
 {
@@ -1679,11 +1776,12 @@ static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_get_bp_2500_mode(speed);
 	case XGBE_PORT_MODE_1000BASE_T:
-	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_NBASE_T:
 	case XGBE_PORT_MODE_10GBASE_T:
+		return xgbe_phy_get_baset_mode(phy_data, speed);
+	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_10GBASE_R:
-		return XGBE_MODE_UNKNOWN;
+		return xgbe_phy_get_basex_mode(phy_data, speed);
 	case XGBE_PORT_MODE_SFP:
 		return xgbe_phy_get_sfp_mode(phy_data, speed);
 	default:
@@ -1737,6 +1835,39 @@ static bool xgbe_phy_check_mode(struct xgbe_prv_data *pdata,
 	return false;
 }
 
+static bool xgbe_phy_use_basex_mode(struct xgbe_prv_data *pdata,
+				    enum xgbe_mode mode)
+{
+	switch (mode) {
+	case XGBE_MODE_X:
+		return xgbe_phy_check_mode(pdata, mode,
+					   ADVERTISED_1000baseT_Full);
+	case XGBE_MODE_KR:
+		return xgbe_phy_check_mode(pdata, mode,
+					   ADVERTISED_10000baseT_Full);
+	default:
+		return false;
+	}
+}
+
+static bool xgbe_phy_use_baset_mode(struct xgbe_prv_data *pdata,
+				    enum xgbe_mode mode)
+{
+	switch (mode) {
+	case XGBE_MODE_SGMII_100:
+		return xgbe_phy_check_mode(pdata, mode,
+					   ADVERTISED_100baseT_Full);
+	case XGBE_MODE_SGMII_1000:
+		return xgbe_phy_check_mode(pdata, mode,
+					   ADVERTISED_1000baseT_Full);
+	case XGBE_MODE_KR:
+		return xgbe_phy_check_mode(pdata, mode,
+					   ADVERTISED_10000baseT_Full);
+	default:
+		return false;
+	}
+}
+
 static bool xgbe_phy_use_sfp_mode(struct xgbe_prv_data *pdata,
 				  enum xgbe_mode mode)
 {
@@ -1803,11 +1934,12 @@ static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_use_bp_2500_mode(pdata, mode);
 	case XGBE_PORT_MODE_1000BASE_T:
-	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_NBASE_T:
 	case XGBE_PORT_MODE_10GBASE_T:
+		return xgbe_phy_use_baset_mode(pdata, mode);
+	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_10GBASE_R:
-		return false;
+		return xgbe_phy_use_basex_mode(pdata, mode);
 	case XGBE_PORT_MODE_SFP:
 		return xgbe_phy_use_sfp_mode(pdata, mode);
 	default:
@@ -1815,6 +1947,33 @@ static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
 	}
 }
 
+static bool xgbe_phy_valid_speed_basex_mode(struct xgbe_phy_data *phy_data,
+					    int speed)
+{
+	switch (speed) {
+	case SPEED_1000:
+		return (phy_data->port_mode == XGBE_PORT_MODE_1000BASE_X);
+	case SPEED_10000:
+		return (phy_data->port_mode == XGBE_PORT_MODE_10GBASE_R);
+	default:
+		return false;
+	}
+}
+
+static bool xgbe_phy_valid_speed_baset_mode(struct xgbe_phy_data *phy_data,
+					    int speed)
+{
+	switch (speed) {
+	case SPEED_100:
+	case SPEED_1000:
+		return true;
+	case SPEED_10000:
+		return (phy_data->port_mode == XGBE_PORT_MODE_10GBASE_T);
+	default:
+		return false;
+	}
+}
+
 static bool xgbe_phy_valid_speed_sfp_mode(struct xgbe_phy_data *phy_data,
 					  int speed)
 {
@@ -1862,11 +2021,12 @@ static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_valid_speed_bp_2500_mode(speed);
 	case XGBE_PORT_MODE_1000BASE_T:
-	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_NBASE_T:
 	case XGBE_PORT_MODE_10GBASE_T:
+		return xgbe_phy_valid_speed_baset_mode(phy_data, speed);
+	case XGBE_PORT_MODE_1000BASE_X:
 	case XGBE_PORT_MODE_10GBASE_R:
-		return false;
+		return xgbe_phy_valid_speed_basex_mode(phy_data, speed);
 	case XGBE_PORT_MODE_SFP:
 		return xgbe_phy_valid_speed_sfp_mode(phy_data, speed);
 	default:
@@ -1992,6 +2152,121 @@ static void xgbe_phy_sfp_setup(struct xgbe_prv_data *pdata)
 	xgbe_phy_sfp_gpio_setup(pdata);
 }
 
+static int xgbe_phy_int_mdio_reset(struct xgbe_prv_data *pdata)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+	unsigned int ret;
+
+	ret = pdata->hw_if.set_gpio(pdata, phy_data->mdio_reset_gpio);
+	if (ret)
+		return ret;
+
+	ret = pdata->hw_if.clr_gpio(pdata, phy_data->mdio_reset_gpio);
+
+	return ret;
+}
+
+static int xgbe_phy_i2c_mdio_reset(struct xgbe_prv_data *pdata)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+	u8 gpio_reg, gpio_ports[2], gpio_data[3];
+	int ret;
+
+	/* Read the output port registers */
+	gpio_reg = 2;
+	ret = xgbe_phy_i2c_read(pdata, phy_data->mdio_reset_addr,
+				&gpio_reg, sizeof(gpio_reg),
+				gpio_ports, sizeof(gpio_ports));
+	if (ret)
+		return ret;
+
+	/* Prepare to write the GPIO data */
+	gpio_data[0] = 2;
+	gpio_data[1] = gpio_ports[0];
+	gpio_data[2] = gpio_ports[1];
+
+	/* Set the GPIO pin */
+	if (phy_data->mdio_reset_gpio < 8)
+		gpio_data[1] |= (1 << (phy_data->mdio_reset_gpio % 8));
+	else
+		gpio_data[2] |= (1 << (phy_data->mdio_reset_gpio % 8));
+
+	/* Write the output port registers */
+	ret = xgbe_phy_i2c_write(pdata, phy_data->mdio_reset_addr,
+				 gpio_data, sizeof(gpio_data));
+	if (ret)
+		return ret;
+
+	/* Clear the GPIO pin */
+	if (phy_data->mdio_reset_gpio < 8)
+		gpio_data[1] &= ~(1 << (phy_data->mdio_reset_gpio % 8));
+	else
+		gpio_data[2] &= ~(1 << (phy_data->mdio_reset_gpio % 8));
+
+	/* Write the output port registers */
+	ret = xgbe_phy_i2c_write(pdata, phy_data->mdio_reset_addr,
+				 gpio_data, sizeof(gpio_data));
+
+	return ret;
+}
+
+static int xgbe_phy_mdio_reset(struct xgbe_prv_data *pdata)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+	int ret;
+
+	if (phy_data->conn_type != XGBE_CONN_TYPE_MDIO)
+		return 0;
+
+	ret = xgbe_phy_get_comm_ownership(pdata);
+	if (ret)
+		return ret;
+
+	if (phy_data->mdio_reset == XGBE_MDIO_RESET_I2C_GPIO)
+		ret = xgbe_phy_i2c_mdio_reset(pdata);
+	else if (phy_data->mdio_reset == XGBE_MDIO_RESET_INT_GPIO)
+		ret = xgbe_phy_int_mdio_reset(pdata);
+
+	xgbe_phy_put_comm_ownership(pdata);
+
+	return ret;
+}
+
+static int xgbe_phy_mdio_reset_setup(struct xgbe_prv_data *pdata)
+{
+	struct xgbe_phy_data *phy_data = pdata->phy_data;
+	unsigned int reg;
+
+	if (phy_data->conn_type != XGBE_CONN_TYPE_MDIO)
+		return 0;
+
+	reg = XP_IOREAD(pdata, XP_PROP_3);
+	phy_data->mdio_reset = XP_GET_BITS(reg, XP_PROP_3, MDIO_RESET);
+	switch (phy_data->mdio_reset) {
+	case XGBE_MDIO_RESET_NONE:
+	case XGBE_MDIO_RESET_I2C_GPIO:
+	case XGBE_MDIO_RESET_INT_GPIO:
+		break;
+	default:
+		dev_err(pdata->dev, "unsupported MDIO reset (%#x)\n",
+			phy_data->mdio_reset);
+		return -EINVAL;
+	}
+
+	if (phy_data->mdio_reset == XGBE_MDIO_RESET_I2C_GPIO) {
+		phy_data->mdio_reset_addr = XGBE_GPIO_ADDRESS_PCA9555 +
+					    XP_GET_BITS(reg, XP_PROP_3,
+							MDIO_RESET_I2C_ADDR);
+		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
+							MDIO_RESET_I2C_GPIO);
+	} else if (phy_data->mdio_reset == XGBE_MDIO_RESET_INT_GPIO) {
+		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
+							MDIO_RESET_INT_GPIO);
+	}
+
+	return 0;
+}
+
 static bool xgbe_phy_port_mode_mismatch(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_phy_data *phy_data = pdata->phy_data;
@@ -2022,7 +2297,8 @@ static bool xgbe_phy_port_mode_mismatch(struct xgbe_prv_data *pdata)
 			return false;
 		break;
 	case XGBE_PORT_MODE_10GBASE_T:
-		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
+		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) ||
+		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
 		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000))
 			return false;
 		break;
@@ -2142,6 +2418,7 @@ static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_phy_data *phy_data = pdata->phy_data;
 	enum xgbe_mode cur_mode;
+	int ret;
 
 	/* Reset by power cycling the PHY */
 	cur_mode = phy_data->cur_mode;
@@ -2152,6 +2429,10 @@ static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
 		return 0;
 
 	/* Reset the external PHY */
+	ret = xgbe_phy_mdio_reset(pdata);
+	if (ret)
+		return ret;
+
 	return phy_init_hw(phy_data->phydev);
 }
 
@@ -2213,6 +2494,11 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 		return -EINVAL;
 	}
 
+	/* Check for and validate MDIO reset support */
+	ret = xgbe_phy_mdio_reset_setup(pdata);
+	if (ret)
+		return ret;
+
 	/* Indicate current mode is unknown */
 	phy_data->cur_mode = XGBE_MODE_UNKNOWN;
 
@@ -2220,6 +2506,7 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 	pdata->phy.supported = 0;
 
 	switch (phy_data->port_mode) {
+	/* Backplane support */
 	case XGBE_PORT_MODE_BACKPLANE:
 		pdata->phy.supported |= SUPPORTED_Autoneg;
 		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
@@ -2246,12 +2533,91 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 
 		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
 		break;
+
+	/* MDIO 1GBase-T support */
 	case XGBE_PORT_MODE_1000BASE_T:
+		pdata->phy.supported |= SUPPORTED_Autoneg;
+		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+		pdata->phy.supported |= SUPPORTED_TP;
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
+			pdata->phy.supported |= SUPPORTED_100baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_100;
+		}
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
+			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_1000;
+		}
+
+		phy_data->phydev_mode = XGBE_MDIO_MODE_CL22;
+		break;
+
+	/* MDIO Base-X support */
 	case XGBE_PORT_MODE_1000BASE_X:
+		pdata->phy.supported |= SUPPORTED_Autoneg;
+		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+		pdata->phy.supported |= SUPPORTED_FIBRE;
+		pdata->phy.supported |= SUPPORTED_1000baseT_Full;
+		phy_data->start_mode = XGBE_MODE_X;
+
+		phy_data->phydev_mode = XGBE_MDIO_MODE_CL22;
+		break;
+
+	/* MDIO NBase-T support */
 	case XGBE_PORT_MODE_NBASE_T:
+		pdata->phy.supported |= SUPPORTED_Autoneg;
+		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+		pdata->phy.supported |= SUPPORTED_TP;
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
+			pdata->phy.supported |= SUPPORTED_100baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_100;
+		}
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
+			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_1000;
+		}
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_2500) {
+			pdata->phy.supported |= SUPPORTED_2500baseX_Full;
+			phy_data->start_mode = XGBE_MODE_KX_2500;
+		}
+
+		phy_data->phydev_mode = XGBE_MDIO_MODE_CL45;
+		break;
+
+	/* 10GBase-T support */
 	case XGBE_PORT_MODE_10GBASE_T:
+		pdata->phy.supported |= SUPPORTED_Autoneg;
+		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+		pdata->phy.supported |= SUPPORTED_TP;
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
+			pdata->phy.supported |= SUPPORTED_100baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_100;
+		}
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
+			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
+			phy_data->start_mode = XGBE_MODE_SGMII_1000;
+		}
+		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000) {
+			pdata->phy.supported |= SUPPORTED_10000baseT_Full;
+			phy_data->start_mode = XGBE_MODE_KR;
+		}
+
+		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
+		break;
+
+	/* 10GBase-R support */
 	case XGBE_PORT_MODE_10GBASE_R:
-		return -ENODEV;
+		pdata->phy.supported |= SUPPORTED_Autoneg;
+		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+		pdata->phy.supported |= SUPPORTED_TP;
+		pdata->phy.supported |= SUPPORTED_10000baseT_Full;
+		if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
+			pdata->phy.supported |= SUPPORTED_10000baseR_FEC;
+		phy_data->start_mode = XGBE_MODE_SFI;
+
+		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
+		break;
+
+	/* SFP support */
 	case XGBE_PORT_MODE_SFP:
 		pdata->phy.supported |= SUPPORTED_Autoneg;
 		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index a691f844fa7264f57418e9cafe8214d1281ecd8e..34db47094c612f7bbdd3c43aa69ee9e341d52eea 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -289,6 +289,9 @@
 /* ECC correctable error notification window (seconds) */
 #define XGBE_ECC_LIMIT			60
 
+/* MDIO port types */
+#define XGMAC_MAX_C22_PORT		3
+
 struct xgbe_prv_data;
 
 struct xgbe_packet_data {
@@ -675,6 +678,14 @@ struct xgbe_hw_if {
 	void (*write_mmd_regs)(struct xgbe_prv_data *, int, int, int);
 	int (*set_speed)(struct xgbe_prv_data *, int);
 
+	int (*set_ext_mii_mode)(struct xgbe_prv_data *, unsigned int,
+				enum xgbe_mdio_mode);
+	int (*read_ext_mii_regs)(struct xgbe_prv_data *, int, int);
+	int (*write_ext_mii_regs)(struct xgbe_prv_data *, int, int, u16);
+
+	int (*set_gpio)(struct xgbe_prv_data *, unsigned int);
+	int (*clr_gpio)(struct xgbe_prv_data *, unsigned int);
+
 	void (*enable_tx)(struct xgbe_prv_data *);
 	void (*disable_tx)(struct xgbe_prv_data *);
 	void (*enable_rx)(struct xgbe_prv_data *);
@@ -1111,6 +1122,7 @@ struct xgbe_prv_data {
 	struct xgbe_phy phy;
 	int mdio_mmd;
 	unsigned long link_check;
+	struct completion mdio_complete;
 
 	char an_name[IFNAMSIZ + 32];
 	struct workqueue_struct *an_workqueue;