Commit 41ae14071cd7 for kernel

commit 41ae14071cd7f6a7770e2fe1f8a0859d4c2c6ba4
Author: Daniel Machon <daniel.machon@microchip.com>
Date:   Wed May 6 09:25:39 2026 +0200

    net: sparx5: configure serdes for 1000BASE-X in sparx5_port_init()

    sparx5_port_init() only invokes sparx5_serdes_set() and the associated
    shadow-device enable and low-speed device switch for SGMII and QSGMII.
    On any port with a high-speed primary device (DEV5G/DEV10G/DEV25G)
    configured for 1000BASE-X the serdes is therefore left uninitialized,
    the DEV2G5 shadow is never enabled, and the port stays pointed at its
    high-speed device rather than the DEV2G5. The PCS1G block looks
    healthy in isolation, but no frames reach the link partner.

    Add 1000BASE-X to the check so the same three steps run.

    Note: the same issue might apply to 2500BASE-X, but that will,
    eventually, be addressed in a separate commit.

    Reported-by: Andrew Lunn <andrew@lunn.ch>
    Fixes: 946e7fd5053a ("net: sparx5: add port module support")
    Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
    Link: https://patch.msgid.link/20260506-misc-fixes-sparx5-lan969x-v2-4-fb236aa96908@microchip.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
index 04bc8fffaf96..62c49893de3c 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
@@ -1128,7 +1128,8 @@ int sparx5_port_init(struct sparx5 *sparx5,
 		DEV2G5_PCS1G_SD_CFG(port->portno));

 	if (conf->portmode == PHY_INTERFACE_MODE_QSGMII ||
-	    conf->portmode == PHY_INTERFACE_MODE_SGMII) {
+	    conf->portmode == PHY_INTERFACE_MODE_SGMII ||
+	    conf->portmode == PHY_INTERFACE_MODE_1000BASEX) {
 		err = sparx5_serdes_set(sparx5, port, conf);
 		if (err)
 			return err;