Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 62e4866..1d8d36d 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Mediatek MT7530 DSA Switch driver
  * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 #include <linux/etherdevice.h>
 #include <linux/if_bridge.h>
@@ -18,11 +10,10 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/netdevice.h>
-#include <linux/of_gpio.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/of_platform.h>
-#include <linux/phy.h>
+#include <linux/phylink.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
@@ -437,24 +428,48 @@
 mt7530_pad_clk_setup(struct dsa_switch *ds, int mode)
 {
 	struct mt7530_priv *priv = ds->priv;
-	u32 ncpo1, ssc_delta, trgint, i;
+	u32 ncpo1, ssc_delta, trgint, i, xtal;
+
+	xtal = mt7530_read(priv, MT7530_MHWTRAP) & HWTRAP_XTAL_MASK;
+
+	if (xtal == HWTRAP_XTAL_20MHZ) {
+		dev_err(priv->dev,
+			"%s: MT7530 with a 20MHz XTAL is not supported!\n",
+			__func__);
+		return -EINVAL;
+	}
 
 	switch (mode) {
 	case PHY_INTERFACE_MODE_RGMII:
 		trgint = 0;
+		/* PLL frequency: 125MHz */
 		ncpo1 = 0x0c80;
-		ssc_delta = 0x87;
 		break;
 	case PHY_INTERFACE_MODE_TRGMII:
 		trgint = 1;
-		ncpo1 = 0x1400;
-		ssc_delta = 0x57;
+		if (priv->id == ID_MT7621) {
+			/* PLL frequency: 150MHz: 1.2GBit */
+			if (xtal == HWTRAP_XTAL_40MHZ)
+				ncpo1 = 0x0780;
+			if (xtal == HWTRAP_XTAL_25MHZ)
+				ncpo1 = 0x0a00;
+		} else { /* PLL frequency: 250MHz: 2.0Gbit */
+			if (xtal == HWTRAP_XTAL_40MHZ)
+				ncpo1 = 0x0c80;
+			if (xtal == HWTRAP_XTAL_25MHZ)
+				ncpo1 = 0x1400;
+		}
 		break;
 	default:
 		dev_err(priv->dev, "xMII mode %d not supported\n", mode);
 		return -EINVAL;
 	}
 
+	if (xtal == HWTRAP_XTAL_25MHZ)
+		ssc_delta = 0x57;
+	else
+		ssc_delta = 0x87;
+
 	mt7530_rmw(priv, MT7530_P6ECR, P6_INTF_MODE_MASK,
 		   P6_INTF_MODE(trgint));
 
@@ -516,7 +531,9 @@
 			mt7530_rmw(priv, MT7530_TRGMII_RD(i),
 				   RD_TAP_MASK, RD_TAP(16));
 	else
-		mt7623_trgmii_set(priv, GSW_INTF_MODE, INTF_MODE_TRGMII);
+		if (priv->id != ID_MT7621)
+			mt7623_trgmii_set(priv, GSW_INTF_MODE,
+					  INTF_MODE_TRGMII);
 
 	return 0;
 }
@@ -616,62 +633,75 @@
 	return ARRAY_SIZE(mt7530_mib);
 }
 
-static void mt7530_adjust_link(struct dsa_switch *ds, int port,
-			       struct phy_device *phydev)
+static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
 {
 	struct mt7530_priv *priv = ds->priv;
+	u8 tx_delay = 0;
+	int val;
 
-	if (phy_is_pseudo_fixed_link(phydev)) {
-		dev_dbg(priv->dev, "phy-mode for master device = %x\n",
-			phydev->interface);
+	mutex_lock(&priv->reg_mutex);
 
-		/* Setup TX circuit incluing relevant PAD and driving */
-		mt7530_pad_clk_setup(ds, phydev->interface);
+	val = mt7530_read(priv, MT7530_MHWTRAP);
 
-		/* Setup RX circuit, relevant PAD and driving on the host
-		 * which must be placed after the setup on the device side is
-		 * all finished.
-		 */
-		mt7623_pad_clk_setup(ds);
-	} else {
-		u16 lcl_adv = 0, rmt_adv = 0;
-		u8 flowctrl;
-		u32 mcr = PMCR_USERP_LINK | PMCR_FORCE_MODE;
+	val |= MHWTRAP_MANUAL | MHWTRAP_P5_MAC_SEL | MHWTRAP_P5_DIS;
+	val &= ~MHWTRAP_P5_RGMII_MODE & ~MHWTRAP_PHY0_SEL;
 
-		switch (phydev->speed) {
-		case SPEED_1000:
-			mcr |= PMCR_FORCE_SPEED_1000;
-			break;
-		case SPEED_100:
-			mcr |= PMCR_FORCE_SPEED_100;
-			break;
-		};
+	switch (priv->p5_intf_sel) {
+	case P5_INTF_SEL_PHY_P0:
+		/* MT7530_P5_MODE_GPHY_P0: 2nd GMAC -> P5 -> P0 */
+		val |= MHWTRAP_PHY0_SEL;
+		/* fall through */
+	case P5_INTF_SEL_PHY_P4:
+		/* MT7530_P5_MODE_GPHY_P4: 2nd GMAC -> P5 -> P4 */
+		val &= ~MHWTRAP_P5_MAC_SEL & ~MHWTRAP_P5_DIS;
 
-		if (phydev->link)
-			mcr |= PMCR_FORCE_LNK;
-
-		if (phydev->duplex) {
-			mcr |= PMCR_FORCE_FDX;
-
-			if (phydev->pause)
-				rmt_adv = LPA_PAUSE_CAP;
-			if (phydev->asym_pause)
-				rmt_adv |= LPA_PAUSE_ASYM;
-
-			if (phydev->advertising & ADVERTISED_Pause)
-				lcl_adv |= ADVERTISE_PAUSE_CAP;
-			if (phydev->advertising & ADVERTISED_Asym_Pause)
-				lcl_adv |= ADVERTISE_PAUSE_ASYM;
-
-			flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
-
-			if (flowctrl & FLOW_CTRL_TX)
-				mcr |= PMCR_TX_FC_EN;
-			if (flowctrl & FLOW_CTRL_RX)
-				mcr |= PMCR_RX_FC_EN;
-		}
-		mt7530_write(priv, MT7530_PMCR_P(port), mcr);
+		/* Setup the MAC by default for the cpu port */
+		mt7530_write(priv, MT7530_PMCR_P(5), 0x56300);
+		break;
+	case P5_INTF_SEL_GMAC5:
+		/* MT7530_P5_MODE_GMAC: P5 -> External phy or 2nd GMAC */
+		val &= ~MHWTRAP_P5_DIS;
+		break;
+	case P5_DISABLED:
+		interface = PHY_INTERFACE_MODE_NA;
+		break;
+	default:
+		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
+			priv->p5_intf_sel);
+		goto unlock_exit;
 	}
+
+	/* Setup RGMII settings */
+	if (phy_interface_mode_is_rgmii(interface)) {
+		val |= MHWTRAP_P5_RGMII_MODE;
+
+		/* P5 RGMII RX Clock Control: delay setting for 1000M */
+		mt7530_write(priv, MT7530_P5RGMIIRXCR, CSR_RGMII_EDGE_ALIGN);
+
+		/* Don't set delay in DSA mode */
+		if (!dsa_is_dsa_port(priv->ds, 5) &&
+		    (interface == PHY_INTERFACE_MODE_RGMII_TXID ||
+		     interface == PHY_INTERFACE_MODE_RGMII_ID))
+			tx_delay = 4; /* n * 0.5 ns */
+
+		/* P5 RGMII TX Clock Control: delay x */
+		mt7530_write(priv, MT7530_P5RGMIITXCR,
+			     CSR_RGMII_TXC_CFG(0x10 + tx_delay));
+
+		/* reduce P5 RGMII Tx driving, 8mA */
+		mt7530_write(priv, MT7530_IO_DRV_CR,
+			     P5_IO_CLK_DRV(1) | P5_IO_DATA_DRV(1));
+	}
+
+	mt7530_write(priv, MT7530_MHWTRAP, val);
+
+	dev_dbg(ds->dev, "Setup P5, HWTRAP=0x%x, intf_sel=%s, phy-mode=%s\n",
+		val, p5_intf_modes(priv->p5_intf_sel), phy_modes(interface));
+
+	priv->p5_interface = interface;
+
+unlock_exit:
+	mutex_unlock(&priv->reg_mutex);
 }
 
 static int
@@ -682,15 +712,16 @@
 	mt7530_write(priv, MT7530_PVC_P(port),
 		     PORT_SPEC_TAG);
 
-	/* Setup the MAC by default for the cpu port */
-	mt7530_write(priv, MT7530_PMCR_P(port), PMCR_CPUP_LINK);
-
 	/* Disable auto learning on the cpu port */
 	mt7530_set(priv, MT7530_PSC_P(port), SA_DIS);
 
 	/* Unknown unicast frame fordwarding to the cpu port */
 	mt7530_set(priv, MT7530_MFC, UNU_FFP(BIT(port)));
 
+	/* Set CPU port number */
+	if (priv->id == ID_MT7621)
+		mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port));
+
 	/* CPU port gets connected to all user ports of
 	 * the switch
 	 */
@@ -706,10 +737,10 @@
 {
 	struct mt7530_priv *priv = ds->priv;
 
-	mutex_lock(&priv->reg_mutex);
+	if (!dsa_is_user_port(ds, port))
+		return 0;
 
-	/* Setup the MAC for the user port */
-	mt7530_write(priv, MT7530_PMCR_P(port), PMCR_USERP_LINK);
+	mutex_lock(&priv->reg_mutex);
 
 	/* Allow the user port gets connected to the cpu port and also
 	 * restore the port matrix if the port is the member of a certain
@@ -719,7 +750,7 @@
 	priv->ports[port].enable = true;
 	mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK,
 		   priv->ports[port].pm);
-	mt7530_port_set_status(priv, port, 1);
+	mt7530_port_set_status(priv, port, 0);
 
 	mutex_unlock(&priv->reg_mutex);
 
@@ -727,11 +758,13 @@
 }
 
 static void
-mt7530_port_disable(struct dsa_switch *ds, int port,
-		    struct phy_device *phy)
+mt7530_port_disable(struct dsa_switch *ds, int port)
 {
 	struct mt7530_priv *priv = ds->priv;
 
+	if (!dsa_is_user_port(ds, port))
+		return;
+
 	mutex_lock(&priv->reg_mutex);
 
 	/* Clear up all port matrix which could be restored in the next
@@ -827,11 +860,9 @@
 	mt7530_rmw(priv, MT7530_PVC_P(port), VLAN_ATTR_MASK,
 		   VLAN_ATTR(MT7530_VLAN_TRANSPARENT));
 
-	priv->ports[port].vlan_filtering = false;
-
 	for (i = 0; i < MT7530_NUM_PORTS; i++) {
 		if (dsa_is_user_port(ds, i) &&
-		    priv->ports[i].vlan_filtering) {
+		    dsa_port_is_vlan_filtering(&ds->ports[i])) {
 			all_user_ports_removed = false;
 			break;
 		}
@@ -890,8 +921,8 @@
 		 * And the other port's port matrix cannot be broken when the
 		 * other port is still a VLAN-aware port.
 		 */
-		if (!priv->ports[i].vlan_filtering &&
-		    dsa_is_user_port(ds, i) && i != port) {
+		if (dsa_is_user_port(ds, i) && i != port &&
+		   !dsa_port_is_vlan_filtering(&ds->ports[i])) {
 			if (dsa_to_port(ds, i)->bridge_dev != bridge)
 				continue;
 			if (priv->ports[i].enable)
@@ -909,8 +940,6 @@
 			   PCR_MATRIX(BIT(MT7530_CPU_PORT)));
 	priv->ports[port].pm = PCR_MATRIX(BIT(MT7530_CPU_PORT));
 
-	mt7530_port_set_vlan_unaware(ds, port);
-
 	mutex_unlock(&priv->reg_mutex);
 }
 
@@ -1012,10 +1041,6 @@
 mt7530_port_vlan_filtering(struct dsa_switch *ds, int port,
 			   bool vlan_filtering)
 {
-	struct mt7530_priv *priv = ds->priv;
-
-	priv->ports[port].vlan_filtering = vlan_filtering;
-
 	if (vlan_filtering) {
 		/* The port is being kept as VLAN-unaware port when bridge is
 		 * set up with vlan_filtering not being set, Otherwise, the
@@ -1024,6 +1049,8 @@
 		 */
 		mt7530_port_set_vlan_aware(ds, port);
 		mt7530_port_set_vlan_aware(ds, MT7530_CPU_PORT);
+	} else {
+		mt7530_port_set_vlan_unaware(ds, port);
 	}
 
 	return 0;
@@ -1138,7 +1165,7 @@
 	/* The port is kept as VLAN-unaware if bridge with vlan_filtering not
 	 * being set.
 	 */
-	if (!priv->ports[port].vlan_filtering)
+	if (!dsa_port_is_vlan_filtering(&ds->ports[port]))
 		return;
 
 	mutex_lock(&priv->reg_mutex);
@@ -1169,7 +1196,7 @@
 	/* The port is kept as VLAN-unaware if bridge with vlan_filtering not
 	 * being set.
 	 */
-	if (!priv->ports[port].vlan_filtering)
+	if (!dsa_port_is_vlan_filtering(&ds->ports[port]))
 		return 0;
 
 	mutex_lock(&priv->reg_mutex);
@@ -1213,34 +1240,40 @@
 mt7530_setup(struct dsa_switch *ds)
 {
 	struct mt7530_priv *priv = ds->priv;
-	int ret, i;
-	u32 id, val;
-	struct device_node *dn;
+	struct device_node *phy_node;
+	struct device_node *mac_np;
 	struct mt7530_dummy_poll p;
+	phy_interface_t interface;
+	struct device_node *dn;
+	u32 id, val;
+	int ret, i;
 
 	/* The parent node of master netdev which holds the common system
 	 * controller also is the container for two GMACs nodes representing
 	 * as two netdev instances.
 	 */
 	dn = ds->ports[MT7530_CPU_PORT].master->dev.of_node->parent;
-	priv->ethernet = syscon_node_to_regmap(dn);
-	if (IS_ERR(priv->ethernet))
-		return PTR_ERR(priv->ethernet);
 
-	regulator_set_voltage(priv->core_pwr, 1000000, 1000000);
-	ret = regulator_enable(priv->core_pwr);
-	if (ret < 0) {
-		dev_err(priv->dev,
-			"Failed to enable core power: %d\n", ret);
-		return ret;
-	}
+	if (priv->id == ID_MT7530) {
+		priv->ethernet = syscon_node_to_regmap(dn);
+		if (IS_ERR(priv->ethernet))
+			return PTR_ERR(priv->ethernet);
 
-	regulator_set_voltage(priv->io_pwr, 3300000, 3300000);
-	ret = regulator_enable(priv->io_pwr);
-	if (ret < 0) {
-		dev_err(priv->dev, "Failed to enable io pwr: %d\n",
-			ret);
-		return ret;
+		regulator_set_voltage(priv->core_pwr, 1000000, 1000000);
+		ret = regulator_enable(priv->core_pwr);
+		if (ret < 0) {
+			dev_err(priv->dev,
+				"Failed to enable core power: %d\n", ret);
+			return ret;
+		}
+
+		regulator_set_voltage(priv->io_pwr, 3300000, 3300000);
+		ret = regulator_enable(priv->io_pwr);
+		if (ret < 0) {
+			dev_err(priv->dev, "Failed to enable io pwr: %d\n",
+				ret);
+			return ret;
+		}
 	}
 
 	/* Reset whole chip through gpio pin or memory-mapped registers for
@@ -1283,6 +1316,8 @@
 	val |= MHWTRAP_MANUAL;
 	mt7530_write(priv, MT7530_MHWTRAP, val);
 
+	priv->p6_interface = PHY_INTERFACE_MODE_NA;
+
 	/* Enable and reset MIB counters */
 	mt7530_mib_reset(ds);
 
@@ -1296,9 +1331,43 @@
 		if (dsa_is_cpu_port(ds, i))
 			mt7530_cpu_port_enable(priv, i);
 		else
-			mt7530_port_disable(ds, i, NULL);
+			mt7530_port_disable(ds, i);
 	}
 
+	/* Setup port 5 */
+	priv->p5_intf_sel = P5_DISABLED;
+	interface = PHY_INTERFACE_MODE_NA;
+
+	if (!dsa_is_unused_port(ds, 5)) {
+		priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
+		interface = of_get_phy_mode(ds->ports[5].dn);
+	} else {
+		/* Scan the ethernet nodes. look for GMAC1, lookup used phy */
+		for_each_child_of_node(dn, mac_np) {
+			if (!of_device_is_compatible(mac_np,
+						     "mediatek,eth-mac"))
+				continue;
+
+			ret = of_property_read_u32(mac_np, "reg", &id);
+			if (ret < 0 || id != 1)
+				continue;
+
+			phy_node = of_parse_phandle(mac_np, "phy-handle", 0);
+			if (phy_node->parent == priv->dev->of_node->parent) {
+				interface = of_get_phy_mode(mac_np);
+				id = of_mdio_parse_addr(ds->dev, phy_node);
+				if (id == 0)
+					priv->p5_intf_sel = P5_INTF_SEL_PHY_P0;
+				if (id == 4)
+					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;
+			}
+			of_node_put(phy_node);
+			break;
+		}
+	}
+
+	mt7530_setup_port5(ds, interface);
+
 	/* Flush the FDB table */
 	ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
 	if (ret < 0)
@@ -1307,6 +1376,216 @@
 	return 0;
 }
 
+static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
+				      unsigned int mode,
+				      const struct phylink_link_state *state)
+{
+	struct mt7530_priv *priv = ds->priv;
+	u32 mcr_cur, mcr_new;
+
+	switch (port) {
+	case 0: /* Internal phy */
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		if (state->interface != PHY_INTERFACE_MODE_GMII)
+			return;
+		break;
+	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
+		if (priv->p5_interface == state->interface)
+			break;
+		if (!phy_interface_mode_is_rgmii(state->interface) &&
+		    state->interface != PHY_INTERFACE_MODE_MII &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			return;
+
+		mt7530_setup_port5(ds, state->interface);
+		break;
+	case 6: /* 1st cpu port */
+		if (priv->p6_interface == state->interface)
+			break;
+
+		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
+		    state->interface != PHY_INTERFACE_MODE_TRGMII)
+			return;
+
+		/* Setup TX circuit incluing relevant PAD and driving */
+		mt7530_pad_clk_setup(ds, state->interface);
+
+		if (priv->id == ID_MT7530) {
+			/* Setup RX circuit, relevant PAD and driving on the
+			 * host which must be placed after the setup on the
+			 * device side is all finished.
+			 */
+			mt7623_pad_clk_setup(ds);
+		}
+
+		priv->p6_interface = state->interface;
+		break;
+	default:
+		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
+		return;
+	}
+
+	if (phylink_autoneg_inband(mode)) {
+		dev_err(ds->dev, "%s: in-band negotiation unsupported\n",
+			__func__);
+		return;
+	}
+
+	mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
+	mcr_new = mcr_cur;
+	mcr_new &= ~(PMCR_FORCE_SPEED_1000 | PMCR_FORCE_SPEED_100 |
+		     PMCR_FORCE_FDX | PMCR_TX_FC_EN | PMCR_RX_FC_EN);
+	mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN |
+		   PMCR_BACKPR_EN | PMCR_FORCE_MODE | PMCR_FORCE_LNK;
+
+	/* Are we connected to external phy */
+	if (port == 5 && dsa_is_user_port(ds, 5))
+		mcr_new |= PMCR_EXT_PHY;
+
+	switch (state->speed) {
+	case SPEED_1000:
+		mcr_new |= PMCR_FORCE_SPEED_1000;
+		break;
+	case SPEED_100:
+		mcr_new |= PMCR_FORCE_SPEED_100;
+		break;
+	}
+	if (state->duplex == DUPLEX_FULL) {
+		mcr_new |= PMCR_FORCE_FDX;
+		if (state->pause & MLO_PAUSE_TX)
+			mcr_new |= PMCR_TX_FC_EN;
+		if (state->pause & MLO_PAUSE_RX)
+			mcr_new |= PMCR_RX_FC_EN;
+	}
+
+	if (mcr_new != mcr_cur)
+		mt7530_write(priv, MT7530_PMCR_P(port), mcr_new);
+}
+
+static void mt7530_phylink_mac_link_down(struct dsa_switch *ds, int port,
+					 unsigned int mode,
+					 phy_interface_t interface)
+{
+	struct mt7530_priv *priv = ds->priv;
+
+	mt7530_port_set_status(priv, port, 0);
+}
+
+static void mt7530_phylink_mac_link_up(struct dsa_switch *ds, int port,
+				       unsigned int mode,
+				       phy_interface_t interface,
+				       struct phy_device *phydev)
+{
+	struct mt7530_priv *priv = ds->priv;
+
+	mt7530_port_set_status(priv, port, 1);
+}
+
+static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
+				    unsigned long *supported,
+				    struct phylink_link_state *state)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+
+	switch (port) {
+	case 0: /* Internal phy */
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			goto unsupported;
+		break;
+	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    !phy_interface_mode_is_rgmii(state->interface) &&
+		    state->interface != PHY_INTERFACE_MODE_MII &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			goto unsupported;
+		break;
+	case 6: /* 1st cpu port */
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    state->interface != PHY_INTERFACE_MODE_RGMII &&
+		    state->interface != PHY_INTERFACE_MODE_TRGMII)
+			goto unsupported;
+		break;
+	default:
+		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
+unsupported:
+		linkmode_zero(supported);
+		return;
+	}
+
+	phylink_set_port_modes(mask);
+	phylink_set(mask, Autoneg);
+
+	if (state->interface == PHY_INTERFACE_MODE_TRGMII) {
+		phylink_set(mask, 1000baseT_Full);
+	} else {
+		phylink_set(mask, 10baseT_Half);
+		phylink_set(mask, 10baseT_Full);
+		phylink_set(mask, 100baseT_Half);
+		phylink_set(mask, 100baseT_Full);
+
+		if (state->interface != PHY_INTERFACE_MODE_MII) {
+			phylink_set(mask, 1000baseT_Half);
+			phylink_set(mask, 1000baseT_Full);
+			if (port == 5)
+				phylink_set(mask, 1000baseX_Full);
+		}
+	}
+
+	phylink_set(mask, Pause);
+	phylink_set(mask, Asym_Pause);
+
+	linkmode_and(supported, supported, mask);
+	linkmode_and(state->advertising, state->advertising, mask);
+}
+
+static int
+mt7530_phylink_mac_link_state(struct dsa_switch *ds, int port,
+			      struct phylink_link_state *state)
+{
+	struct mt7530_priv *priv = ds->priv;
+	u32 pmsr;
+
+	if (port < 0 || port >= MT7530_NUM_PORTS)
+		return -EINVAL;
+
+	pmsr = mt7530_read(priv, MT7530_PMSR_P(port));
+
+	state->link = (pmsr & PMSR_LINK);
+	state->an_complete = state->link;
+	state->duplex = !!(pmsr & PMSR_DPX);
+
+	switch (pmsr & PMSR_SPEED_MASK) {
+	case PMSR_SPEED_10:
+		state->speed = SPEED_10;
+		break;
+	case PMSR_SPEED_100:
+		state->speed = SPEED_100;
+		break;
+	case PMSR_SPEED_1000:
+		state->speed = SPEED_1000;
+		break;
+	default:
+		state->speed = SPEED_UNKNOWN;
+		break;
+	}
+
+	state->pause &= ~(MLO_PAUSE_RX | MLO_PAUSE_TX);
+	if (pmsr & PMSR_RX_FC)
+		state->pause |= MLO_PAUSE_RX;
+	if (pmsr & PMSR_TX_FC)
+		state->pause |= MLO_PAUSE_TX;
+
+	return 1;
+}
+
 static const struct dsa_switch_ops mt7530_switch_ops = {
 	.get_tag_protocol	= mtk_get_tag_protocol,
 	.setup			= mt7530_setup,
@@ -1315,7 +1594,6 @@
 	.phy_write		= mt7530_phy_write,
 	.get_ethtool_stats	= mt7530_get_ethtool_stats,
 	.get_sset_count		= mt7530_get_sset_count,
-	.adjust_link		= mt7530_adjust_link,
 	.port_enable		= mt7530_port_enable,
 	.port_disable		= mt7530_port_disable,
 	.port_stp_state_set	= mt7530_stp_state_set,
@@ -1328,8 +1606,20 @@
 	.port_vlan_prepare	= mt7530_port_vlan_prepare,
 	.port_vlan_add		= mt7530_port_vlan_add,
 	.port_vlan_del		= mt7530_port_vlan_del,
+	.phylink_validate	= mt7530_phylink_validate,
+	.phylink_mac_link_state = mt7530_phylink_mac_link_state,
+	.phylink_mac_config	= mt7530_phylink_mac_config,
+	.phylink_mac_link_down	= mt7530_phylink_mac_link_down,
+	.phylink_mac_link_up	= mt7530_phylink_mac_link_up,
 };
 
+static const struct of_device_id mt7530_of_match[] = {
+	{ .compatible = "mediatek,mt7621", .data = (void *)ID_MT7621, },
+	{ .compatible = "mediatek,mt7530", .data = (void *)ID_MT7530, },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt7530_of_match);
+
 static int
 mt7530_probe(struct mdio_device *mdiodev)
 {
@@ -1360,13 +1650,21 @@
 		}
 	}
 
-	priv->core_pwr = devm_regulator_get(&mdiodev->dev, "core");
-	if (IS_ERR(priv->core_pwr))
-		return PTR_ERR(priv->core_pwr);
+	/* Get the hardware identifier from the devicetree node.
+	 * We will need it for some of the clock and regulator setup.
+	 */
+	priv->id = (unsigned int)(unsigned long)
+		of_device_get_match_data(&mdiodev->dev);
 
-	priv->io_pwr = devm_regulator_get(&mdiodev->dev, "io");
-	if (IS_ERR(priv->io_pwr))
-		return PTR_ERR(priv->io_pwr);
+	if (priv->id == ID_MT7530) {
+		priv->core_pwr = devm_regulator_get(&mdiodev->dev, "core");
+		if (IS_ERR(priv->core_pwr))
+			return PTR_ERR(priv->core_pwr);
+
+		priv->io_pwr = devm_regulator_get(&mdiodev->dev, "io");
+		if (IS_ERR(priv->io_pwr))
+			return PTR_ERR(priv->io_pwr);
+	}
 
 	/* Not MCM that indicates switch works as the remote standalone
 	 * integrated circuit so the GPIO pin would be used to complete
@@ -1412,12 +1710,6 @@
 	mutex_destroy(&priv->reg_mutex);
 }
 
-static const struct of_device_id mt7530_of_match[] = {
-	{ .compatible = "mediatek,mt7530" },
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, mt7530_of_match);
-
 static struct mdio_driver mt7530_mdio_driver = {
 	.probe  = mt7530_probe,
 	.remove = mt7530_remove,