1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 654f42d00092..a6c87793d899 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1207,6 +1207,23 @@ static void dp83640_remove(struct phy_device *phydev)
         kfree(dp83640);
 }
 
+static int dp83640_soft_reset(struct phy_device *phydev)
+{
+        int ret;
+
+        ret = genphy_soft_reset(phydev);
+        if (ret < 0)
+                return ret;
+
+        /* From DP83640 datasheet: "Software driver code must wait 3 us
+         * following a software reset before allowing further serial MII
+         * operations with the DP83640."
+         */
+        udelay(10);             /* Taking udelay inaccuracy into account */
+
+        return 0;
+}
+
 static int dp83640_config_init(struct phy_device *phydev)
 {
         struct dp83640_private *dp83640 = phydev->priv;
@@ -1501,6 +1518,7 @@ static struct phy_driver dp83640_driver = {
         .flags          = PHY_HAS_INTERRUPT,
         .probe          = dp83640_probe,
         .remove         = dp83640_remove,
+        .soft_reset     = dp83640_soft_reset,
         .config_init    = dp83640_config_init,
         .ack_interrupt  = dp83640_ack_interrupt,
         .config_intr    = dp83640_config_intr,