net: phy: aquantia: add suspend / resume callbacks for AQR107 family

Add suspend / resume callbacks for AQR107 family. Suspend powers down
the complete chip except MDIO and internal CPU.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/aquantia_main.c

@@ -478,6 +478,18 @@ static void aqr107_link_change_notify(struct phy_device *phydev)
 		phydev_info(phydev, "Aquantia 1000Base-T2 mode active\n");
 }
 
+static int aqr107_suspend(struct phy_device *phydev)
+{
+	return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, MDIO_CTRL1,
+				MDIO_CTRL1_LPOWER);
+}
+
+static int aqr107_resume(struct phy_device *phydev)
+{
+	return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, MDIO_CTRL1,
+				  MDIO_CTRL1_LPOWER);
+}
+
 static struct phy_driver aqr_driver[] = {
 {
 	PHY_ID_MATCH_MODEL(PHY_ID_AQ1202),
@@ -532,6 +544,8 @@ static struct phy_driver aqr_driver[] = {
 	.read_status	= aqr107_read_status,
 	.get_tunable    = aqr107_get_tunable,
 	.set_tunable    = aqr107_set_tunable,
+	.suspend	= aqr107_suspend,
+	.resume		= aqr107_resume,
 	.link_change_notify = aqr107_link_change_notify,
 },
 {
@@ -547,6 +561,8 @@ static struct phy_driver aqr_driver[] = {
 	.read_status	= aqr107_read_status,
 	.get_tunable    = aqr107_get_tunable,
 	.set_tunable    = aqr107_set_tunable,
+	.suspend	= aqr107_suspend,
+	.resume		= aqr107_resume,
 	.link_change_notify = aqr107_link_change_notify,
 },
 {