net: stmmac: socfpga: Enable internal GMII when using 1000BaseX

Dwmac Socfpga may be used with an instance of a Lynx / Altera TSE PCS,
in which case it gains support for 1000BaseX.

It appears that the PCS is wired to the MAC through an internal GMII
bus. Make sure that we enable the GMII_MII mode for the internal MAC when
using 1000BaseX.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250424071223.221239-2-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 59f90b123c5b8f02ec724d90c0df5136eb1bf715..027356033e5e0bf79f75e1a912753134c198019f 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -256,6 +256,7 @@ static int socfpga_set_phy_mode_common(int phymode, u32 *val)
        case PHY_INTERFACE_MODE_MII:
        case PHY_INTERFACE_MODE_GMII:
        case PHY_INTERFACE_MODE_SGMII:
+       case PHY_INTERFACE_MODE_1000BASEX:
                *val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
                break;
        case PHY_INTERFACE_MODE_RMII: