[PATCH net-next v5 0/5] net: renesas: rswitch: Modify initialization for SERDES and PHY

[PATCH net-next v5 0/5] net: renesas: rswitch: Modify initialization for SERDES and PHY

[Yoshihiro Shimoda]

- My platform has the 88x2110.
- The MACTYPE setting of strap pin on the platform is SXGMII.
- However, we realized that the SoC cannot communicate the PHY with SXGMII
  because of mismatching hardware specification.
- We have a lot of boards which mismatch the MACTYPE setting.

So, I would like to change the MACTYPE as SGMII by software for the platform.

The patch [1/5] sets phydev->host_interfaces by phylink for Marvell PHY
driver (marvell10g) to initialize the MACTYPE.

- The patch [1/5] siplifies the rswitch driver.
- The patch [2/5] converts to phy_device from phylink.
- The patch [3/5] sets phydev->host_interfaces from this driver without
  any new functions of phylib.
- The patch [4/5] adds phy_power_on() calling to initialize the Ethernet
  SERDES PHY driver (r8a779f0-eth-serdes) for each channel.
- The patch [5/5] adds "max-speed" handling.

Changes from v4:
https://lore.kernel.org/all/20230127142621.1761278-1-yoshihiro.shimoda.uh@renesas.com/
 - No modification of phylink API.
 - Convert to phylib instead of phylink.
 - Add "max-speed" handling.

Changes from v3:
https://lore.kernel.org/all/20230127014812.1656340-1-yoshihiro.shimoda.uh@renesas.com/
 - Keep a pointer of "port" and more simplify the code.

Yoshihiro Shimoda (5):
  net: renesas: rswitch: Simplify struct phy * handling
  net: renesas: rswitch: Convert to phy_device
  net: renesas: rswitch: Add host_interfaces setting
  net: renesas: rswitch: Add phy_power_{on,off}() calling
  net: renesas: rswitch: Add "max-speed" handling

 drivers/net/ethernet/renesas/rswitch.c | 231 ++++++++++++-------------
 drivers/net/ethernet/renesas/rswitch.h |   4 +-
 2 files changed, 111 insertions(+), 124 deletions(-)

-- 
2.25.1

[PATCH net-next v5 1/5] net: renesas: rswitch: Simplify struct phy * handling

[Yoshihiro Shimoda]

Simplify struct phy *serdes handling by keeping the valiable in
the struct rswitch_device.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.c | 103 ++++++-------------------
 drivers/net/ethernet/renesas/rswitch.h |   2 +
 2 files changed, 27 insertions(+), 78 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 14fc0af304ce..1c154018d795 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1071,32 +1071,14 @@ static struct device_node *rswitch_get_port_node(struct rswitch_device *rdev)
 	return port;
 }
 
-/* Call of_node_put(mdio) after done */
-static struct device_node *rswitch_get_mdio_node(struct rswitch_device *rdev)
-{
-	struct device_node *port, *mdio;
-
-	port = rswitch_get_port_node(rdev);
-	if (!port)
-		return NULL;
-
-	mdio = of_get_child_by_name(port, "mdio");
-	of_node_put(port);
-
-	return mdio;
-}
-
 static int rswitch_etha_get_params(struct rswitch_device *rdev)
 {
-	struct device_node *port;
 	int err;
 
-	port = rswitch_get_port_node(rdev);
-	if (!port)
+	if (!rdev->np_port)
 		return 0;	/* ignored */
 
-	err = of_get_phy_mode(port, &rdev->etha->phy_interface);
-	of_node_put(port);
+	err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface);
 
 	switch (rdev->etha->phy_interface) {
 	case PHY_INTERFACE_MODE_MII:
@@ -1133,7 +1115,7 @@ static int rswitch_mii_register(struct rswitch_device *rdev)
 	mii_bus->write_c45 = rswitch_etha_mii_write_c45;
 	mii_bus->parent = &rdev->priv->pdev->dev;
 
-	mdio_np = rswitch_get_mdio_node(rdev);
+	mdio_np = of_get_child_by_name(rdev->np_port, "mdio");
 	err = of_mdiobus_register(mii_bus, mdio_np);
 	if (err < 0) {
 		mdiobus_free(mii_bus);
@@ -1185,12 +1167,9 @@ static const struct phylink_mac_ops rswitch_phylink_ops = {
 
 static int rswitch_phylink_init(struct rswitch_device *rdev)
 {
-	struct device_node *port;
 	struct phylink *phylink;
-	int err;
 
-	port = rswitch_get_port_node(rdev);
-	if (!port)
+	if (!rdev->np_port)
 		return -ENODEV;
 
 	rdev->phylink_config.dev = &rdev->ndev->dev;
@@ -1199,19 +1178,14 @@ static int rswitch_phylink_init(struct rswitch_device *rdev)
 	__set_bit(PHY_INTERFACE_MODE_USXGMII, rdev->phylink_config.supported_interfaces);
 	rdev->phylink_config.mac_capabilities = MAC_100FD | MAC_1000FD | MAC_2500FD;
 
-	phylink = phylink_create(&rdev->phylink_config, &port->fwnode,
+	phylink = phylink_create(&rdev->phylink_config, &rdev->np_port->fwnode,
 				 rdev->etha->phy_interface, &rswitch_phylink_ops);
-	if (IS_ERR(phylink)) {
-		err = PTR_ERR(phylink);
-		goto out;
-	}
+	if (IS_ERR(phylink))
+		return PTR_ERR(phylink);
 
 	rdev->phylink = phylink;
-	err = phylink_of_phy_connect(rdev->phylink, port, rdev->etha->phy_interface);
-out:
-	of_node_put(port);
 
-	return err;
+	return phylink_of_phy_connect(rdev->phylink, rdev->np_port, rdev->etha->phy_interface);
 }
 
 static void rswitch_phylink_deinit(struct rswitch_device *rdev)
@@ -1224,47 +1198,14 @@ static void rswitch_phylink_deinit(struct rswitch_device *rdev)
 
 static int rswitch_serdes_set_params(struct rswitch_device *rdev)
 {
-	struct device_node *port = rswitch_get_port_node(rdev);
-	struct phy *serdes;
 	int err;
 
-	serdes = devm_of_phy_get(&rdev->priv->pdev->dev, port, NULL);
-	of_node_put(port);
-	if (IS_ERR(serdes))
-		return PTR_ERR(serdes);
-
-	err = phy_set_mode_ext(serdes, PHY_MODE_ETHERNET,
+	err = phy_set_mode_ext(rdev->serdes, PHY_MODE_ETHERNET,
 			       rdev->etha->phy_interface);
 	if (err < 0)
 		return err;
 
-	return phy_set_speed(serdes, rdev->etha->speed);
-}
-
-static int rswitch_serdes_init(struct rswitch_device *rdev)
-{
-	struct device_node *port = rswitch_get_port_node(rdev);
-	struct phy *serdes;
-
-	serdes = devm_of_phy_get(&rdev->priv->pdev->dev, port, NULL);
-	of_node_put(port);
-	if (IS_ERR(serdes))
-		return PTR_ERR(serdes);
-
-	return phy_init(serdes);
-}
-
-static int rswitch_serdes_deinit(struct rswitch_device *rdev)
-{
-	struct device_node *port = rswitch_get_port_node(rdev);
-	struct phy *serdes;
-
-	serdes = devm_of_phy_get(&rdev->priv->pdev->dev, port, NULL);
-	of_node_put(port);
-	if (IS_ERR(serdes))
-		return PTR_ERR(serdes);
-
-	return phy_exit(serdes);
+	return phy_set_speed(rdev->serdes, rdev->etha->speed);
 }
 
 static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
@@ -1286,6 +1227,12 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 	if (err < 0)
 		goto err_phylink_init;
 
+	rdev->serdes = devm_of_phy_get(&rdev->priv->pdev->dev, rdev->np_port, NULL);
+	if (IS_ERR(rdev->serdes)) {
+		err = PTR_ERR(rdev->serdes);
+		goto err_serdes_phy_get;
+	}
+
 	err = rswitch_serdes_set_params(rdev);
 	if (err < 0)
 		goto err_serdes_set_params;
@@ -1293,6 +1240,7 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 	return 0;
 
 err_serdes_set_params:
+err_serdes_phy_get:
 	rswitch_phylink_deinit(rdev);
 
 err_phylink_init:
@@ -1318,7 +1266,7 @@ static int rswitch_ether_port_init_all(struct rswitch_private *priv)
 	}
 
 	rswitch_for_each_enabled_port(priv, i) {
-		err = rswitch_serdes_init(priv->rdev[i]);
+		err = phy_init(priv->rdev[i]->serdes);
 		if (err)
 			goto err_serdes;
 	}
@@ -1327,7 +1275,7 @@ static int rswitch_ether_port_init_all(struct rswitch_private *priv)
 
 err_serdes:
 	rswitch_for_each_enabled_port_continue_reverse(priv, i)
-		rswitch_serdes_deinit(priv->rdev[i]);
+		phy_exit(priv->rdev[i]->serdes);
 	i = RSWITCH_NUM_PORTS;
 
 err_init_one:
@@ -1342,7 +1290,7 @@ static void rswitch_ether_port_deinit_all(struct rswitch_private *priv)
 	int i;
 
 	for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
-		rswitch_serdes_deinit(priv->rdev[i]);
+		phy_exit(priv->rdev[i]->serdes);
 		rswitch_ether_port_deinit_one(priv->rdev[i]);
 	}
 }
@@ -1565,7 +1513,6 @@ static int rswitch_device_alloc(struct rswitch_private *priv, int index)
 {
 	struct platform_device *pdev = priv->pdev;
 	struct rswitch_device *rdev;
-	struct device_node *port;
 	struct net_device *ndev;
 	int err;
 
@@ -1594,10 +1541,10 @@ static int rswitch_device_alloc(struct rswitch_private *priv, int index)
 
 	netif_napi_add(ndev, &rdev->napi, rswitch_poll);
 
-	port = rswitch_get_port_node(rdev);
-	rdev->disabled = !port;
-	err = of_get_ethdev_address(port, ndev);
-	of_node_put(port);
+	rdev->np_port = rswitch_get_port_node(rdev);
+	rdev->disabled = !rdev->np_port;
+	err = of_get_ethdev_address(rdev->np_port, ndev);
+	of_node_put(rdev->np_port);
 	if (err) {
 		if (is_valid_ether_addr(rdev->etha->mac_addr))
 			eth_hw_addr_set(ndev, rdev->etha->mac_addr);
@@ -1798,7 +1745,7 @@ static void rswitch_deinit(struct rswitch_private *priv)
 	for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
 		struct rswitch_device *rdev = priv->rdev[i];
 
-		rswitch_serdes_deinit(rdev);
+		phy_exit(priv->rdev[i]->serdes);
 		rswitch_ether_port_deinit_one(rdev);
 		unregister_netdev(rdev->ndev);
 		rswitch_device_free(priv, i);
diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 49efb0f31c77..6ae79395006e 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -953,6 +953,8 @@ struct rswitch_device {
 
 	int port;
 	struct rswitch_etha *etha;
+	struct device_node *np_port;
+	struct phy *serdes;
 };
 
 struct rswitch_mfwd_mac_table_entry {
-- 
2.25.1

[PATCH net-next v5 2/5] net: renesas: rswitch: Convert to phy_device

[Yoshihiro Shimoda]

Intended to set phy_device->host_interfaces by phylink in the future.
But there is difficult to implement phylink properly, especially
supporting the in-band mode on this driver because extra initialization
is needed after linked the ethernet PHY up. So, convert to phy_device
from phylink.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.c | 110 ++++++++++++++-----------
 drivers/net/ethernet/renesas/rswitch.h |   2 -
 2 files changed, 62 insertions(+), 50 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 1c154018d795..479499f9fcb5 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -16,7 +16,6 @@
 #include <linux/of_irq.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
-#include <linux/phylink.h>
 #include <linux/phy/phy.h>
 #include <linux/pm_runtime.h>
 #include <linux/rtnetlink.h>
@@ -1139,61 +1138,78 @@ static void rswitch_mii_unregister(struct rswitch_device *rdev)
 	}
 }
 
-static void rswitch_mac_config(struct phylink_config *config,
-			       unsigned int mode,
-			       const struct phylink_link_state *state)
+static void rswitch_adjust_link(struct net_device *ndev)
 {
-}
+	struct rswitch_device *rdev = netdev_priv(ndev);
+	struct phy_device *phydev = ndev->phydev;
 
-static void rswitch_mac_link_down(struct phylink_config *config,
-				  unsigned int mode,
-				  phy_interface_t interface)
-{
+	/* Current hardware has a restriction not to change speed at runtime */
+	if (phydev->link != rdev->etha->link) {
+		phy_print_status(phydev);
+		rdev->etha->link = phydev->link;
+	}
 }
 
-static void rswitch_mac_link_up(struct phylink_config *config,
-				struct phy_device *phydev, unsigned int mode,
-				phy_interface_t interface, int speed,
-				int duplex, bool tx_pause, bool rx_pause)
+static void rswitch_phy_remove_link_mode(struct rswitch_device *rdev,
+					 struct phy_device *phydev)
 {
-	/* Current hardware cannot change speed at runtime */
-}
+	/* Current hardware has a restriction not to change speed at runtime */
+	switch (rdev->etha->speed) {
+	case SPEED_2500:
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT);
+		break;
+	case SPEED_1000:
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT);
+		break;
+	case SPEED_100:
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
+		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
+		break;
+	default:
+		break;
+	}
 
-static const struct phylink_mac_ops rswitch_phylink_ops = {
-	.mac_config = rswitch_mac_config,
-	.mac_link_down = rswitch_mac_link_down,
-	.mac_link_up = rswitch_mac_link_up,
-};
+	phy_set_max_speed(phydev, rdev->etha->speed);
+}
 
-static int rswitch_phylink_init(struct rswitch_device *rdev)
+static int rswitch_phy_device_init(struct rswitch_device *rdev)
 {
-	struct phylink *phylink;
+	struct phy_device *phydev;
+	struct device_node *phy;
 
 	if (!rdev->np_port)
 		return -ENODEV;
 
-	rdev->phylink_config.dev = &rdev->ndev->dev;
-	rdev->phylink_config.type = PHYLINK_NETDEV;
-	__set_bit(PHY_INTERFACE_MODE_SGMII, rdev->phylink_config.supported_interfaces);
-	__set_bit(PHY_INTERFACE_MODE_USXGMII, rdev->phylink_config.supported_interfaces);
-	rdev->phylink_config.mac_capabilities = MAC_100FD | MAC_1000FD | MAC_2500FD;
+	phy = of_parse_phandle(rdev->np_port, "phy-handle", 0);
+	if (!phy)
+		return -ENODEV;
+
+	phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
+				rdev->etha->phy_interface);
+	of_node_put(phy);
+	if (!phydev)
+		return -ENOENT;
 
-	phylink = phylink_create(&rdev->phylink_config, &rdev->np_port->fwnode,
-				 rdev->etha->phy_interface, &rswitch_phylink_ops);
-	if (IS_ERR(phylink))
-		return PTR_ERR(phylink);
+	phy_set_max_speed(phydev, SPEED_2500);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+	rswitch_phy_remove_link_mode(rdev, phydev);
 
-	rdev->phylink = phylink;
+	phy_attached_info(phydev);
 
-	return phylink_of_phy_connect(rdev->phylink, rdev->np_port, rdev->etha->phy_interface);
+	return 0;
 }
 
-static void rswitch_phylink_deinit(struct rswitch_device *rdev)
+static void rswitch_phy_device_deinit(struct rswitch_device *rdev)
 {
-	rtnl_lock();
-	phylink_disconnect_phy(rdev->phylink);
-	rtnl_unlock();
-	phylink_destroy(rdev->phylink);
+	if (rdev->ndev->phydev) {
+		phy_disconnect(rdev->ndev->phydev);
+		rdev->ndev->phydev = NULL;
+	}
 }
 
 static int rswitch_serdes_set_params(struct rswitch_device *rdev)
@@ -1223,9 +1239,9 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 	if (err < 0)
 		return err;
 
-	err = rswitch_phylink_init(rdev);
+	err = rswitch_phy_device_init(rdev);
 	if (err < 0)
-		goto err_phylink_init;
+		goto err_phy_device_init;
 
 	rdev->serdes = devm_of_phy_get(&rdev->priv->pdev->dev, rdev->np_port, NULL);
 	if (IS_ERR(rdev->serdes)) {
@@ -1241,9 +1257,9 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 
 err_serdes_set_params:
 err_serdes_phy_get:
-	rswitch_phylink_deinit(rdev);
+	rswitch_phy_device_deinit(rdev);
 
-err_phylink_init:
+err_phy_device_init:
 	rswitch_mii_unregister(rdev);
 
 	return err;
@@ -1251,7 +1267,7 @@ static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 
 static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev)
 {
-	rswitch_phylink_deinit(rdev);
+	rswitch_phy_device_deinit(rdev);
 	rswitch_mii_unregister(rdev);
 }
 
@@ -1299,7 +1315,7 @@ static int rswitch_open(struct net_device *ndev)
 {
 	struct rswitch_device *rdev = netdev_priv(ndev);
 
-	phylink_start(rdev->phylink);
+	phy_start(ndev->phydev);
 
 	napi_enable(&rdev->napi);
 	netif_start_queue(ndev);
@@ -1319,7 +1335,7 @@ static int rswitch_stop(struct net_device *ndev)
 	rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false);
 	rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false);
 
-	phylink_stop(rdev->phylink);
+	phy_stop(ndev->phydev);
 	napi_disable(&rdev->napi);
 
 	return 0;
@@ -1447,8 +1463,6 @@ static int rswitch_hwstamp_set(struct net_device *ndev, struct ifreq *req)
 
 static int rswitch_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
 {
-	struct rswitch_device *rdev = netdev_priv(ndev);
-
 	if (!netif_running(ndev))
 		return -EINVAL;
 
@@ -1458,7 +1472,7 @@ static int rswitch_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd
 	case SIOCSHWTSTAMP:
 		return rswitch_hwstamp_set(ndev, req);
 	default:
-		return phylink_mii_ioctl(rdev->phylink, req, cmd);
+		return phy_mii_ioctl(ndev->phydev, req, cmd);
 	}
 }
 
diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 6ae79395006e..59830ab91a69 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -943,8 +943,6 @@ struct rswitch_device {
 	struct rswitch_private *priv;
 	struct net_device *ndev;
 	struct napi_struct napi;
-	struct phylink *phylink;
-	struct phylink_config phylink_config;
 	void __iomem *addr;
 	struct rswitch_gwca_queue *tx_queue;
 	struct rswitch_gwca_queue *rx_queue;
-- 
2.25.1

[PATCH net-next v5 3/5] net: renesas: rswitch: Add host_interfaces setting

[Yoshihiro Shimoda]

Set phydev->host_interfaces before calling of_phy_connect() to
configure the PHY with the information of host_interfaces.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 479499f9fcb5..f8b3a81c0447 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1178,6 +1178,7 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
 {
 	struct phy_device *phydev;
 	struct device_node *phy;
+	int err = -ENOENT;
 
 	if (!rdev->np_port)
 		return -ENODEV;
@@ -1186,11 +1187,18 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
 	if (!phy)
 		return -ENODEV;
 
+	/* Set phydev->host_interfaces before calling of_phy_connect() to
+	 * configure the PHY with the information of host_interfaces.
+	 */
+	phydev = of_phy_find_device(phy);
+	if (!phydev)
+		goto out;
+	__set_bit(rdev->etha->phy_interface, phydev->host_interfaces);
+
 	phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
 				rdev->etha->phy_interface);
-	of_node_put(phy);
 	if (!phydev)
-		return -ENOENT;
+		goto out;
 
 	phy_set_max_speed(phydev, SPEED_2500);
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
@@ -1201,7 +1209,11 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
 
 	phy_attached_info(phydev);
 
-	return 0;
+	err = 0;
+out:
+	of_node_put(phy);
+
+	return err;
 }
 
 static void rswitch_phy_device_deinit(struct rswitch_device *rdev)
-- 
2.25.1

[PATCH net-next v5 4/5] net: renesas: rswitch: Add phy_power_{on,off}() calling

[Yoshihiro Shimoda]

Some Ethernet PHYs (like marvell10g) will decide the host interface
mode by the media-side speed. So, the rswitch driver needs to
initialize one of the Ethernet SERDES (r8a779f0-eth-serdes) ports
after linked the Ethernet PHY up. The r8a779f0-eth-serdes driver has
.init() for initializing all ports and .power_on() for initializing
each port. So, add phy_power_{on,off} calling for it.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index f8b3a81c0447..f1a0dd1098f9 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1146,6 +1146,11 @@ static void rswitch_adjust_link(struct net_device *ndev)
 	/* Current hardware has a restriction not to change speed at runtime */
 	if (phydev->link != rdev->etha->link) {
 		phy_print_status(phydev);
+		if (phydev->link)
+			phy_power_on(rdev->serdes);
+		else
+			phy_power_off(rdev->serdes);
+
 		rdev->etha->link = phydev->link;
 	}
 }
-- 
2.25.1

[PATCH net-next v5 5/5] net: renesas: rswitch: Add "max-speed" handling

[Yoshihiro Shimoda]

The previous code set the speed by the interface mode of PHY.
Also this hardware has a restriction which cannot change the speed
at runtime. To use other speed, add "max-speed" handling to set
each port's speed if needed.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index f1a0dd1098f9..50b61a0a7f53 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1072,13 +1072,23 @@ static struct device_node *rswitch_get_port_node(struct rswitch_device *rdev)
 
 static int rswitch_etha_get_params(struct rswitch_device *rdev)
 {
+	u32 max_speed;
 	int err;
 
 	if (!rdev->np_port)
 		return 0;	/* ignored */
 
 	err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface);
+	if (err)
+		return err;
+
+	err = of_property_read_u32(rdev->np_port, "max-speed", &max_speed);
+	if (!err) {
+		rdev->etha->speed = max_speed;
+		return 0;
+	}
 
+	/* if no "max-speed" property, let's use default speed */
 	switch (rdev->etha->phy_interface) {
 	case PHY_INTERFACE_MODE_MII:
 		rdev->etha->speed = SPEED_100;
@@ -1090,11 +1100,10 @@ static int rswitch_etha_get_params(struct rswitch_device *rdev)
 		rdev->etha->speed = SPEED_2500;
 		break;
 	default:
-		err = -EINVAL;
-		break;
+		return -EINVAL;
 	}
 
-	return err;
+	return 0;
 }
 
 static int rswitch_mii_register(struct rswitch_device *rdev)
-- 
2.25.1

Re: [PATCH net-next v5 0/5] net: renesas: rswitch: Modify initialization for SERDES and PHY

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Wed,  1 Feb 2023 22:14:49 +0900 you wrote:
> - My platform has the 88x2110.
> - The MACTYPE setting of strap pin on the platform is SXGMII.
> - However, we realized that the SoC cannot communicate the PHY with SXGMII
>   because of mismatching hardware specification.
> - We have a lot of boards which mismatch the MACTYPE setting.
> 
> So, I would like to change the MACTYPE as SGMII by software for the platform.
> 
> [...]

Here is the summary with links:
  - [net-next,v5,1/5] net: renesas: rswitch: Simplify struct phy * handling
    https://git.kernel.org/netdev/net-next/c/b46f1e579329
  - [net-next,v5,2/5] net: renesas: rswitch: Convert to phy_device
    https://git.kernel.org/netdev/net-next/c/c16a5033f77b
  - [net-next,v5,3/5] net: renesas: rswitch: Add host_interfaces setting
    https://git.kernel.org/netdev/net-next/c/0df024d0f1d3
  - [net-next,v5,4/5] net: renesas: rswitch: Add phy_power_{on,off}() calling
    https://git.kernel.org/netdev/net-next/c/5cb630925b49
  - [net-next,v5,5/5] net: renesas: rswitch: Add "max-speed" handling
    https://git.kernel.org/netdev/net-next/c/04c77d9130b6

You are awesome, thank you!
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