net: stmmac: qcom-ethqos: add support for 2.5G BASEX mode

Add support for 2.5G speed in 2500BASEX mode to the QCom ethqos driver.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240703181500.28491-2-brgl@bgdev.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Bartosz Golaszewski

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

@@ -665,6 +665,14 @@ static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos)
 	return val;
 }
 
+static void qcom_ethqos_speed_mode_2500(struct net_device *ndev, void *data)
+{
+	struct stmmac_priv *priv = netdev_priv(ndev);
+
+	priv->plat->max_speed = 2500;
+	priv->plat->phy_interface = PHY_INTERFACE_MODE_2500BASEX;
+}
+
 static int ethqos_configure(struct qcom_ethqos *ethqos)
 {
 	return ethqos->configure_func(ethqos);
@@ -787,6 +795,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		ethqos->configure_func = ethqos_configure_rgmii;
 		break;
+	case PHY_INTERFACE_MODE_2500BASEX:
+		plat_dat->speed_mode_2500 = qcom_ethqos_speed_mode_2500;
+		fallthrough;
 	case PHY_INTERFACE_MODE_SGMII:
 		ethqos->configure_func = ethqos_configure_sgmii;
 		break;