net: phy: micrel: use phy_read_mmd and phy_write_mmd

This driver implements open-coded versions of phy_read_mmd() and
phy_write_mmd() for KSZ9031. That's not needed, let's use the
phylib functions directly.

This is compile-tested only because I have no such hardware.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/micrel.c

@@ -426,9 +426,6 @@ static int ksz9021_config_init(struct phy_device *phydev)
 	return 0;
 }
 
-#define MII_KSZ9031RN_MMD_CTRL_REG	0x0d
-#define MII_KSZ9031RN_MMD_REGDATA_REG	0x0e
-#define OP_DATA				1
 #define KSZ9031_PS_TO_REG		60
 
 /* Extended registers */
@@ -446,24 +443,6 @@ static int ksz9021_config_init(struct phy_device *phydev)
 #define MII_KSZ9031RN_EDPD		0x23
 #define MII_KSZ9031RN_EDPD_ENABLE	BIT(0)
 
-static int ksz9031_extended_write(struct phy_device *phydev,
-				  u8 mode, u32 dev_addr, u32 regnum, u16 val)
-{
-	phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
-	phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
-	phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
-	return phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, val);
-}
-
-static int ksz9031_extended_read(struct phy_device *phydev,
-				 u8 mode, u32 dev_addr, u32 regnum)
-{
-	phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
-	phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
-	phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
-	return phy_read(phydev, MII_KSZ9031RN_MMD_REGDATA_REG);
-}
-
 static int ksz9031_of_load_skew_values(struct phy_device *phydev,
 				       const struct device_node *of_node,
 				       u16 reg, size_t field_sz,
@@ -484,7 +463,7 @@ static int ksz9031_of_load_skew_values(struct phy_device *phydev,
 		return 0;
 
 	if (matches < numfields)
-		newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
+		newval = phy_read_mmd(phydev, 2, reg);
 	else
 		newval = 0;
 
@@ -498,7 +477,7 @@ static int ksz9031_of_load_skew_values(struct phy_device *phydev,
 					<< (field_sz * i));
 		}
 
-	return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
+	return phy_write_mmd(phydev, 2, reg, newval);
 }
 
 /* Center KSZ9031RNX FLP timing at 16ms. */
@@ -506,13 +485,13 @@ static int ksz9031_center_flp_timing(struct phy_device *phydev)
 {
 	int result;
 
-	result = ksz9031_extended_write(phydev, OP_DATA, 0,
-					MII_KSZ9031RN_FLP_BURST_TX_HI, 0x0006);
+	result = phy_write_mmd(phydev, 0, MII_KSZ9031RN_FLP_BURST_TX_HI,
+			       0x0006);
 	if (result)
 		return result;
 
-	result = ksz9031_extended_write(phydev, OP_DATA, 0,
-					MII_KSZ9031RN_FLP_BURST_TX_LO, 0x1A80);
+	result = phy_write_mmd(phydev, 0, MII_KSZ9031RN_FLP_BURST_TX_LO,
+			       0x1A80);
 	if (result)
 		return result;
 
@@ -524,11 +503,11 @@ static int ksz9031_enable_edpd(struct phy_device *phydev)
 {
 	int reg;
 
-	reg = ksz9031_extended_read(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD);
+	reg = phy_read_mmd(phydev, 0x1C, MII_KSZ9031RN_EDPD);
 	if (reg < 0)
 		return reg;
-	return ksz9031_extended_write(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD,
-				      reg | MII_KSZ9031RN_EDPD_ENABLE);
+	return phy_write_mmd(phydev, 0x1C, MII_KSZ9031RN_EDPD,
+			     reg | MII_KSZ9031RN_EDPD_ENABLE);
 }
 
 static int ksz9031_config_init(struct phy_device *phydev)
@@ -654,7 +633,7 @@ static int ksz9131_of_load_skew_values(struct phy_device *phydev,
 		return 0;
 
 	if (matches < numfields)
-		newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
+		newval = phy_read_mmd(phydev, 2, reg);
 	else
 		newval = 0;
 
@@ -668,7 +647,7 @@ static int ksz9131_of_load_skew_values(struct phy_device *phydev,
 					<< (field_sz * i));
 		}
 
-	return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
+	return phy_write_mmd(phydev, 2, reg, newval);
 }
 
 static int ksz9131_config_init(struct phy_device *phydev)