From 312753d0aadba0f58841ae513b80fdbabc887523 Mon Sep 17 00:00:00 2001 From: Chukun Pan Date: Wed, 8 Feb 2023 16:32:18 +0800 Subject: [PATCH] net: phy: realtek: support switching between SGMII and 2500BASE-X for RTL822x series After commit ace6aba ("net: phy: realtek: rtl8221: allow to configure SERDES mode"), the rtl8221 phy can work in SGMII and 2500base-x modes respectively. So add interface automatic switching for rtl8221 phy to match various wire speeds. Signed-off-by: Chukun Pan --- drivers/net/phy/realtek.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -686,6 +686,25 @@ static int rtl822x_config_aneg(struct ph return __genphy_config_aneg(phydev, ret); } +static void rtl822x_update_interface(struct phy_device *phydev) +{ + /* Automatically switch SERDES interface between + * SGMII and 2500-BaseX according to speed. + */ + switch (phydev->speed) { + case SPEED_2500: + phydev->interface = PHY_INTERFACE_MODE_2500BASEX; + break; + case SPEED_1000: + case SPEED_100: + case SPEED_10: + phydev->interface = PHY_INTERFACE_MODE_SGMII; + break; + default: + break; + } +} + static int rtl822x_read_status(struct phy_device *phydev) { int ret; @@ -704,11 +723,14 @@ static int rtl822x_read_status(struct ph phydev->lp_advertising, lpadv & RTL_LPADV_2500FULL); } - ret = genphy_read_status(phydev); + ret = rtlgen_read_status(phydev); if (ret < 0) return ret; - return rtlgen_get_speed(phydev); + if (phydev->is_c45 && phydev->link) + rtl822x_update_interface(phydev); + + return 0; } static bool rtlgen_supports_2_5gbps(struct phy_device *phydev)