1 From 312753d0aadba0f58841ae513b80fdbabc887523 Mon Sep 17 00:00:00 2001
2 From: Chukun Pan <amadeus@jmu.edu.cn>
3 Date: Wed, 8 Feb 2023 16:32:18 +0800
4 Subject: [PATCH] net: phy: realtek: support switching between SGMII and
5 2500BASE-X for RTL822x series
7 After commit ace6aba ("net: phy: realtek: rtl8221: allow to configure
8 SERDES mode"), the rtl8221 phy can work in SGMII and 2500base-x modes
9 respectively. So add interface automatic switching for rtl8221 phy to
10 match various wire speeds.
12 Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
14 drivers/net/phy/realtek.c | 26 ++++++++++++++++++++++++--
15 1 file changed, 24 insertions(+), 2 deletions(-)
17 --- a/drivers/net/phy/realtek.c
18 +++ b/drivers/net/phy/realtek.c
19 @@ -714,6 +714,25 @@ static int rtl822x_config_aneg(struct ph
20 return __genphy_config_aneg(phydev, ret);
23 +static void rtl822x_update_interface(struct phy_device *phydev)
25 + /* Automatically switch SERDES interface between
26 + * SGMII and 2500-BaseX according to speed.
28 + switch (phydev->speed) {
30 + phydev->interface = PHY_INTERFACE_MODE_2500BASEX;
35 + phydev->interface = PHY_INTERFACE_MODE_SGMII;
42 static int rtl822x_read_status(struct phy_device *phydev)
45 @@ -732,11 +751,14 @@ static int rtl822x_read_status(struct ph
46 phydev->lp_advertising, lpadv & RTL_LPADV_2500FULL);
49 - ret = genphy_read_status(phydev);
50 + ret = rtlgen_read_status(phydev);
54 - return rtlgen_get_speed(phydev);
55 + if (phydev->is_c45 && phydev->link)
56 + rtl822x_update_interface(phydev);
61 static bool rtlgen_supports_2_5gbps(struct phy_device *phydev)