net: phy: smsc: add flag edpd_mode_set_by_user

Add flag edpd_mode_set_by_user in preparation of adding edpd phy tunable
support. This flag will allow users to override the default behavior
of edpd being disabled if interrupt mode is used.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NSimon Horman <simon.horman@corigine.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/smsc.c

@@ -45,6 +45,7 @@ static struct smsc_hw_stat smsc_hw_stats[] = {
 
 struct smsc_phy_priv {
 	unsigned int edpd_enable:1;
+	unsigned int edpd_mode_set_by_user:1;
 };
 
 static int smsc_phy_ack_interrupt(struct phy_device *phydev)
@@ -117,7 +118,8 @@ int smsc_phy_config_init(struct phy_device *phydev)
 	if (!priv)
 		return 0;
 
-	if (phydev->irq != PHY_POLL)
+	/* don't use EDPD in irq mode except overridden by user */
+	if (!priv->edpd_mode_set_by_user && phydev->irq != PHY_POLL)
 		priv->edpd_enable = false;
 
 	return smsc_phy_config_edpd(phydev);