net: phy: DP83TC811: Add INT_STAT3

Add INT_STAT3 interrupt setting and clearing
support.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/dp83tc811.c

@@ -21,6 +21,7 @@
 #define MII_DP83811_SGMII_CTRL	0x09
 #define MII_DP83811_INT_STAT1	0x12
 #define MII_DP83811_INT_STAT2	0x13
+#define MII_DP83811_INT_STAT3	0x18
 #define MII_DP83811_RESET_CTRL	0x1f
 
 #define DP83811_HW_RESET	BIT(15)
@@ -44,6 +45,11 @@
 #define DP83811_OVERVOLTAGE_INT_EN	BIT(6)
 #define DP83811_UNDERVOLTAGE_INT_EN	BIT(7)
 
+/* INT_STAT3 bits */
+#define DP83811_LPS_INT_EN	BIT(0)
+#define DP83811_NO_FRAME_INT_EN	BIT(3)
+#define DP83811_POR_DONE_INT_EN	BIT(4)
+
 #define MII_DP83811_RXSOP1	0x04a5
 #define MII_DP83811_RXSOP2	0x04a6
 #define MII_DP83811_RXSOP3	0x04a7
@@ -81,6 +87,10 @@ static int dp83811_ack_interrupt(struct phy_device *phydev)
 	if (err < 0)
 		return err;
 
+	err = phy_read(phydev, MII_DP83811_INT_STAT3);
+	if (err < 0)
+		return err;
+
 	return 0;
 }
 
@@ -216,6 +226,18 @@ static int dp83811_config_intr(struct phy_device *phydev)
 				DP83811_UNDERVOLTAGE_INT_EN);
 
 		err = phy_write(phydev, MII_DP83811_INT_STAT2, misr_status);
+		if (err < 0)
+			return err;
+
+		misr_status = phy_read(phydev, MII_DP83811_INT_STAT3);
+		if (misr_status < 0)
+			return misr_status;
+
+		misr_status |= (DP83811_LPS_INT_EN |
+				DP83811_NO_FRAME_INT_EN |
+				DP83811_POR_DONE_INT_EN);
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT3, misr_status);
 
 	} else {
 		err = phy_write(phydev, MII_DP83811_INT_STAT1, 0);
@@ -223,6 +245,10 @@ static int dp83811_config_intr(struct phy_device *phydev)
 			return err;
 
 		err = phy_write(phydev, MII_DP83811_INT_STAT2, 0);
+		if (err < 0)
+			return err;
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT3, 0);
 	}
 
 	return err;