qualcommax: set USXGMII MAC autoneg bit on Aquantia PHY-s

Now that we are not using SSDK anymore, we must set the USXGMII MAC autoneg
bit manually, as otherwise MAC autonegotiation does not work.

Link: https://github.com/openwrt/openwrt/pull/22381
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/qualcommax/patches-6.12/0760-net-phy-aquantia-enable-USXGMII-MAC-autoneg.patch b/target/linux/qualcommax/patches-6.12/0760-net-phy-aquantia-enable-USXGMII-MAC-autoneg.patch
new file mode 100644 (file)
index 0000000..6ff9b32
--- /dev/null
+++ b/target/linux/qualcommax/patches-6.12/0760-net-phy-aquantia-enable-USXGMII-MAC-autoneg.patch
@@ -0,0 +1,36 @@
+From 54280bff5b17407e8b23cdeafdc63f4d43ad1ee5 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko@gmail.com>
+Date: Thu, 27 Nov 2025 13:49:06 +0100
+Subject: [PATCH] net: phy: aquantia: enable USXGMII MAC autoneg
+
+USXGMII MAC autoneg control bit is always set disabled by default, in order
+for USXGMII to work properly we must enable it.
+
+Signed-off-by: Robert Marko <robimarko@gmail.com>
+---
+ drivers/net/phy/aquantia/aquantia_main.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+--- a/drivers/net/phy/aquantia/aquantia_main.c
++++ b/drivers/net/phy/aquantia/aquantia_main.c
+@@ -46,6 +46,9 @@
+ #define MDIO_PHYXS_VEND_IF_STATUS_TYPE_RXAUI  7
+ #define MDIO_PHYXS_VEND_IF_STATUS_TYPE_OCSGMII        10
+ 
++#define MDIO_PHYXS_VEND_PROV2                 0xc441
++#define MDIO_PHYXS_VEND_PROV2_USX_AUTONEG_MAC BIT(3)
++
+ #define MDIO_AN_VEND_PROV                     0xc400
+ #define MDIO_AN_VEND_PROV_1000BASET_FULL      BIT(15)
+ #define MDIO_AN_VEND_PROV_1000BASET_HALF      BIT(14)
+@@ -440,6 +443,10 @@ static int aqr107_read_status(struct phy
+               break;
+       case MDIO_PHYXS_VEND_IF_STATUS_TYPE_USXGMII:
+               phydev->interface = PHY_INTERFACE_MODE_USXGMII;
++              phy_modify_mmd(phydev, MDIO_MMD_PHYXS,
++                             MDIO_PHYXS_VEND_PROV2,
++                             MDIO_PHYXS_VEND_PROV2_USX_AUTONEG_MAC,
++                             MDIO_PHYXS_VEND_PROV2_USX_AUTONEG_MAC);
+               break;
+       case MDIO_PHYXS_VEND_IF_STATUS_TYPE_XAUI:
+               phydev->interface = PHY_INTERFACE_MODE_XAUI;