From 2b773bddeb7695076691e3247efcf0b604a2154a Mon Sep 17 00:00:00 2001 From: Richard Huynh Date: Sun, 19 Oct 2025 21:52:59 +1100 Subject: [PATCH] kernel: rtl8261n: Add support for Serdes RX swap Datasheet claims this register bit is supposed to be set by default, however it was found in practice to not be, and OEM drivers would set this bit at the same time. Signed-off-by: Richard Huynh Link: https://github.com/openwrt/openwrt/pull/20465 Signed-off-by: Christian Marangi --- .../linux/generic/files/drivers/net/phy/rtl8261n/rtk_phy.c | 6 ++++++ .../generic/files/drivers/net/phy/rtl8261n/rtk_phylib.h | 1 + 2 files changed, 7 insertions(+) diff --git a/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phy.c b/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phy.c index faa057f029..a1eb2c1614 100644 --- a/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phy.c +++ b/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phy.c @@ -61,6 +61,7 @@ static int rtl826xb_probe(struct phy_device *phydev) priv->phytype = (phydev->drv->phy_id == REALTEK_PHY_ID_RTL8261N) ? (RTK_PHYLIB_RTL8261N) : (RTK_PHYLIB_RTL8264B); priv->isBasePort = (phydev->drv->phy_id == REALTEK_PHY_ID_RTL8261N) ? (1) : (((phydev->mdio.addr % 4) == 0) ? (1) : (0)); + priv->pnswap_rx = device_property_read_bool(dev, "realtek,pnswap-rx"); priv->pnswap_tx = device_property_read_bool(dev, "realtek,pnswap-tx"); phydev->priv = priv; @@ -125,6 +126,11 @@ static int rtkphy_config_init(struct phy_device *phydev) } #endif + if (priv->pnswap_rx) + phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, + REALTEK_SERDES_GLOBAL_CFG, + REALTEK_HSI_INV); + if (priv->pnswap_tx) phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, REALTEK_SERDES_GLOBAL_CFG, diff --git a/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phylib.h b/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phylib.h index c94e9cb966..c1253b1ec9 100644 --- a/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phylib.h +++ b/target/linux/generic/files/drivers/net/phy/rtl8261n/rtk_phylib.h @@ -51,6 +51,7 @@ struct rtk_phy_priv { uint8 isBasePort; rt_phy_patch_db_t *patch; + bool pnswap_rx; bool pnswap_tx; }; -- 2.30.2