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From 97ca310aa18a93329ef5cd68c20de89761962f45 Mon Sep 17 00:00:00 2001
From: David Bauer <mail@david-bauer.net>
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 <mail@david-bauer.net>
---
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
@@ -935,6 +935,34 @@ static int at803x_set_tunable(struct phy
}
}
+static int at803x_get_features(struct phy_device *phydev)
+{
+ int err;
+
+ err = genphy_read_abilities(phydev);
+ if (err)
+ return err;
+
+ if (!at803x_match_phy_id(phydev, ATH8031_PHY_ID))
+ 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_cable_test_result_trans(u16 status)
{
switch (FIELD_GET(AT803X_CDT_STATUS_STAT_MASK, status)) {
@@ -1156,7 +1184,7 @@ 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,
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