net: add function to read/write extended registers in Micrel Phy

Signed-off-by: Stefano Babic <sbabic@denx.de>

drivers/net/phy/micrel.c

@@ -100,6 +100,19 @@ int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum)
 	return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_DATAR);
 }
 
+
+static int ksz9021_phy_extread(struct phy_device *phydev, int addr, int devaddr,
+			      int regnum)
+{
+	return ksz9021_phy_extended_read(phydev, regnum);
+}
+
+static int ksz9021_phy_extwrite(struct phy_device *phydev, int addr,
+			       int devaddr, int regnum, u16 val)
+{
+	return ksz9021_phy_extended_write(phydev, regnum, val);
+}
+
 /* Micrel ksz9021 */
 static int ksz9021_config(struct phy_device *phydev)
 {
@@ -131,6 +144,8 @@ static struct phy_driver ksz9021_driver = {
 	.config = &ksz9021_config,
 	.startup = &ksz90xx_startup,
 	.shutdown = &genphy_shutdown,
+	.writeext = &ksz9021_phy_extwrite,
+	.readext = &ksz9021_phy_extread,
 };
 #endif
 
@@ -171,6 +186,21 @@ int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
 	return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9031_MMD_REG_DATA);
 }
 
+static int ksz9031_phy_extread(struct phy_device *phydev, int addr, int devaddr,
+			       int regnum)
+{
+	return ksz9031_phy_extended_read(phydev, devaddr, regnum,
+					 MII_KSZ9031_MOD_DATA_NO_POST_INC);
+};
+
+static int ksz9031_phy_extwrite(struct phy_device *phydev, int addr,
+				int devaddr, int regnum, u16 val)
+{
+	return ksz9031_phy_extended_write(phydev, devaddr, regnum,
+					 MII_KSZ9031_MOD_DATA_POST_INC_RW, val);
+};
+
+
 static struct phy_driver ksz9031_driver = {
 	.name = "Micrel ksz9031",
 	.uid  = 0x221620,
@@ -179,6 +209,8 @@ static struct phy_driver ksz9031_driver = {
 	.config   = &genphy_config,
 	.startup  = &ksz90xx_startup,
 	.shutdown = &genphy_shutdown,
+	.writeext = &ksz9031_phy_extwrite,
+	.readext = &ksz9031_phy_extread,
 };
 
 int phy_micrel_init(void)