From 97ca310aa18a93329ef5cd68c20de89761962f45 Mon Sep 17 00:00:00 2001 From: David Bauer Date: Sun, 13 Jun 2021 12:19:36 +0200 Subject: [PATCH] net: phy: at803x: fix feature detection AR8031/AR8033 have different status registers for copper and fiber operation. However, the extended status register is the same for both operation modes. As a result of that, ESTATUS_1000_XFULL is set to 1 even when operating in copper TP mode. Remove this mode from the supported link modes, as this driver currently only supports copper operation. Signed-off-by: David Bauer --- drivers/net/phy/at803x.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -411,6 +411,34 @@ static int at803x_aneg_done(struct phy_d return aneg_done; } +static int at803x_get_features(struct phy_device *phydev) +{ + int err; + + err = genphy_read_abilities(phydev); + if (err) + return err; + + if (!(phydev->phy_id & phydev->drv->phy_id_mask) == (ATH8031_PHY_ID & phydev->drv->phy_id_mask)) + return 0; + + /* AR8031/AR8033 have different status registers + * for copper and fiber operation. However, the + * extended status register is the same for both + * operation modes. + * + * As a result of that, ESTATUS_1000_XFULL is set + * to 1 even when operating in copper TP mode. + * + * Remove this mode from the supported link modes, + * as this driver currently only supports copper + * operation. + */ + linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, + phydev->supported); + return 0; +} + static int at803x_read_status(struct phy_device *phydev) { int ss, err, old_link = phydev->link; @@ -513,7 +541,7 @@ static struct phy_driver at803x_driver[] .resume = at803x_resume, .read_page = at803x_read_page, .write_page = at803x_write_page, - /* PHY_GBIT_FEATURES */ + .get_features = at803x_get_features, .read_status = at803x_read_status, .aneg_done = at803x_aneg_done, .ack_interrupt = &at803x_ack_interrupt,