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path: root/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
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Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
index 85155cd9405c..4aeb927c3715 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
@@ -179,6 +179,9 @@ static int mlxbf_gige_mdio_read(struct mii_bus *bus, int phy_add, int phy_reg)
/* Only return ad bits of the gw register */
ret &= MLXBF_GIGE_MDIO_GW_AD_MASK;
+ /* The MDIO lock is set on read. To release it, clear gw register */
+ writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+
return ret;
}
@@ -203,6 +206,9 @@ static int mlxbf_gige_mdio_write(struct mii_bus *bus, int phy_add,
temp, !(temp & MLXBF_GIGE_MDIO_GW_BUSY_MASK),
5, 1000000);
+ /* The MDIO lock is set on read. To release it, clear gw register */
+ writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+
return ret;
}