net: dsa: mv88e6xxx: pass lane to .serdes_power

Now the first step of all .serdes_power implementations is getting
the lane mapping. Since we have an operation for that, call it in
the wrapper and pass the lane down to the .serdes_power operation.

This also allows to avoid querying the SERDES lane twice in
mv88e6xxx_port_set_cmode.

At the same time provide mv88e6xxx_serdes_power_{up,down} helpers
and prefer up/down instead of on/off as in the documentation.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -2057,13 +2057,15 @@ static int mv88e6xxx_setup_egress_floods(struct mv88e6xxx_chip *chip, int port)
 static int mv88e6xxx_serdes_power(struct mv88e6xxx_chip *chip, int port,
 				  bool on)
 {
+	u8 lane;
 	int err;
 
-	if (!chip->info->ops->serdes_power)
+	lane = mv88e6xxx_serdes_get_lane(chip, port);
+	if (!lane)
 		return 0;
 
 	if (on) {
-		err = chip->info->ops->serdes_power(chip, port, true);
+		err = mv88e6xxx_serdes_power_up(chip, port, lane);
 		if (err)
 			return err;
 
@@ -2074,7 +2076,7 @@ static int mv88e6xxx_serdes_power(struct mv88e6xxx_chip *chip, int port,
 		    chip->ports[port].serdes_irq)
 			chip->info->ops->serdes_irq_free(chip, port);
 
-		err = chip->info->ops->serdes_power(chip, port, false);
+		err = mv88e6xxx_serdes_power_down(chip, port, lane);
 	}
 
 	return err;

drivers/net/dsa/mv88e6xxx/chip.h

@@ -441,7 +441,8 @@ struct mv88e6xxx_ops {
 	int (*mgmt_rsvd2cpu)(struct mv88e6xxx_chip *chip);
 
 	/* Power on/off a SERDES interface */
-	int (*serdes_power)(struct mv88e6xxx_chip *chip, int port, bool on);
+	int (*serdes_power)(struct mv88e6xxx_chip *chip, int port, u8 lane,
+			    bool up);
 
 	/* SERDES lane mapping */
 	u8 (*serdes_get_lane)(struct mv88e6xxx_chip *chip, int port);

drivers/net/dsa/mv88e6xxx/port.c

@@ -439,7 +439,7 @@ static int mv88e6xxx_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
 				return err;
 		}
 
-		err = mv88e6390_serdes_power(chip, port, false);
+		err = mv88e6xxx_serdes_power_down(chip, port, lane);
 		if (err)
 			return err;
 	}
@@ -464,7 +464,7 @@ static int mv88e6xxx_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
 		if (!lane)
 			return -ENODEV;
 
-		err = mv88e6390_serdes_power(chip, port, true);
+		err = mv88e6xxx_serdes_power_up(chip, port, lane);
 		if (err)
 			return err;
 

drivers/net/dsa/mv88e6xxx/serdes.c

@@ -49,19 +49,17 @@ static int mv88e6390_serdes_write(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_phy_write(chip, lane, reg_c45, val);
 }
 
-int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+			   bool up)
 {
 	u16 val, new_val;
 	int err;
 
-	if (!mv88e6xxx_serdes_get_lane(chip, port))
-		return 0;
-
 	err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
 	if (err)
 		return err;
 
-	if (on)
+	if (up)
 		new_val = val & ~BMCR_PDOWN;
 	else
 		new_val = val | BMCR_PDOWN;
@@ -409,9 +407,9 @@ u8 mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 	return lane;
 }
 
-/* Set the power on/off for 10GBASE-R and 10GBASE-X4/X2 */
+/* Set power up/down for 10GBASE-R and 10GBASE-X4/X2 */
 static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, u8 lane,
-				      bool on)
+				      bool up)
 {
 	u16 val, new_val;
 	int err;
@@ -422,7 +420,7 @@ static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, u8 lane,
 	if (err)
 		return err;
 
-	if (on)
+	if (up)
 		new_val = val & ~(MV88E6390_PCS_CONTROL_1_RESET |
 				  MV88E6390_PCS_CONTROL_1_LOOPBACK |
 				  MV88E6390_PCS_CONTROL_1_PDOWN);
@@ -436,9 +434,9 @@ static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, u8 lane,
 	return err;
 }
 
-/* Set the power on/off for SGMII and 1000Base-X */
+/* Set power up/down for SGMII and 1000Base-X */
 static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, u8 lane,
-					bool on)
+					bool up)
 {
 	u16 val, new_val;
 	int err;
@@ -448,7 +446,7 @@ static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, u8 lane,
 	if (err)
 		return err;
 
-	if (on)
+	if (up)
 		new_val = val & ~(MV88E6390_SGMII_CONTROL_RESET |
 				  MV88E6390_SGMII_CONTROL_LOOPBACK |
 				  MV88E6390_SGMII_CONTROL_PDOWN);
@@ -462,23 +460,19 @@ static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, u8 lane,
 	return err;
 }
 
-int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+			   bool up)
 {
 	u8 cmode = chip->ports[port].cmode;
-	u8 lane;
-
-	lane = mv88e6xxx_serdes_get_lane(chip, port);
-	if (!lane)
-		return 0;
 
 	switch (cmode) {
 	case MV88E6XXX_PORT_STS_CMODE_SGMII:
 	case MV88E6XXX_PORT_STS_CMODE_1000BASEX:
 	case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
-		return mv88e6390_serdes_power_sgmii(chip, lane, on);
+		return mv88e6390_serdes_power_sgmii(chip, lane, up);
 	case MV88E6XXX_PORT_STS_CMODE_XAUI:
 	case MV88E6XXX_PORT_STS_CMODE_RXAUI:
-		return mv88e6390_serdes_power_10g(chip, lane, on);
+		return mv88e6390_serdes_power_10g(chip, lane, up);
 	}
 
 	return 0;

drivers/net/dsa/mv88e6xxx/serdes.h

@@ -82,8 +82,10 @@ unsigned int mv88e6352_serdes_irq_mapping(struct mv88e6xxx_chip *chip,
 					  int port);
 unsigned int mv88e6390_serdes_irq_mapping(struct mv88e6xxx_chip *chip,
 					  int port);
-int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
-int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+			   bool on);
+int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+			   bool on);
 int mv88e6390_serdes_irq_setup(struct mv88e6xxx_chip *chip, int port);
 void mv88e6390_serdes_irq_free(struct mv88e6xxx_chip *chip, int port);
 int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port);
@@ -108,6 +110,24 @@ static inline u8 mv88e6xxx_serdes_get_lane(struct mv88e6xxx_chip *chip,
 	return chip->info->ops->serdes_get_lane(chip, port);
 }
 
+static inline int mv88e6xxx_serdes_power_up(struct mv88e6xxx_chip *chip,
+					    int port, u8 lane)
+{
+	if (!chip->info->ops->serdes_power)
+		return -EOPNOTSUPP;
+
+	return chip->info->ops->serdes_power(chip, port, lane, true);
+}
+
+static inline int mv88e6xxx_serdes_power_down(struct mv88e6xxx_chip *chip,
+					      int port, u8 lane)
+{
+	if (!chip->info->ops->serdes_power)
+		return -EOPNOTSUPP;
+
+	return chip->info->ops->serdes_power(chip, port, lane, false);
+}
+
 static inline unsigned int
 mv88e6xxx_serdes_irq_mapping(struct mv88e6xxx_chip *chip, int port)
 {