bcm63xx_enet: implement reset autoneg ethtool callback

Implement the rset_nway ethtool callback which uses libphy generic
autonegotiation restart function.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index e46466cb3627..bc1a9948892b 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1328,6 +1328,20 @@ static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
         mutex_unlock(&priv->mib_update_lock);
 }
 
+static int bcm_enet_nway_reset(struct net_device *dev)
+{
+        struct bcm_enet_priv *priv;
+
+        priv = netdev_priv(dev);
+        if (priv->has_phy) {
+                if (!priv->phydev)
+                        return -ENODEV;
+                return genphy_restart_aneg(priv->phydev);
+        }
+
+        return -EOPNOTSUPP;
+}
+
 static int bcm_enet_get_settings(struct net_device *dev,
                                  struct ethtool_cmd *cmd)
 {
@@ -1470,6 +1484,7 @@ static const struct ethtool_ops bcm_enet_ethtool_ops = {
         .get_strings            = bcm_enet_get_strings,
         .get_sset_count         = bcm_enet_get_sset_count,
         .get_ethtool_stats      = bcm_enet_get_ethtool_stats,
+        .nway_reset             = bcm_enet_nway_reset,
         .get_settings           = bcm_enet_get_settings,
         .set_settings           = bcm_enet_set_settings,
         .get_drvinfo            = bcm_enet_get_drvinfo,