linux-kernel - [PATCH net-next v3 2/3] net: stmmac: socfpga: Don't check for phy to enable the SGMII adapter

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Message-ID: <20250424071223.221239-3-maxime.chevallier@bootlin.com>
Date: Thu, 24 Apr 2025 09:12:21 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: davem@...emloft.net,
	Andrew Lunn <andrew@...n.ch>,
	Russell King <linux@...linux.org.uk>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	thomas.petazzoni@...tlin.com,
	Simon Horman <horms@...nel.org>,
	Alexis Lothoré <alexis.lothore@...tlin.com>,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH net-next v3 2/3] net: stmmac: socfpga: Don't check for phy to enable the SGMII adapter

The SGMII adapter needs to be enabled for both Cisco SGMII and 1000BaseX
operations. It doesn't make sense to check for an attached phydev here,
as we simply might not have any, in particular if we're using the
1000BaseX interface mode.

Make so that we only re-enable the SGMII adapter when it's present, and
when we use a phy_mode that is handled by said adapter.

Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 027356033e5e..c832a41c1747 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -62,14 +62,13 @@ struct socfpga_dwmac {
 	struct mdio_device *pcs_mdiodev;
 };
 
-static void socfpga_dwmac_fix_mac_speed(void *priv, int speed, unsigned int mode)
+static void socfpga_dwmac_fix_mac_speed(void *bsp_priv, int speed,
+					unsigned int mode)
 {
-	struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
+	struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)bsp_priv;
+	struct stmmac_priv *priv = netdev_priv(dev_get_drvdata(dwmac->dev));
 	void __iomem *splitter_base = dwmac->splitter_base;
 	void __iomem *sgmii_adapter_base = dwmac->sgmii_adapter_base;
-	struct device *dev = dwmac->dev;
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct phy_device *phy_dev = ndev->phydev;
 	u32 val;
 
 	if (sgmii_adapter_base)
@@ -96,7 +95,9 @@ static void socfpga_dwmac_fix_mac_speed(void *priv, int speed, unsigned int mode
 		writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
 	}
 
-	if (phy_dev && sgmii_adapter_base)
+	if ((priv->plat->phy_interface == PHY_INTERFACE_MODE_SGMII ||
+	     priv->plat->phy_interface == PHY_INTERFACE_MODE_1000BASEX) &&
+	     sgmii_adapter_base)
 		writew(SGMII_ADAPTER_ENABLE,
 		       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
 }
-- 
2.49.0