net: dsa: mv88e6xxx: change serdes lane parameter type from u8 type to int

Returning 0 is no more an error case with MV88E6393 family
which has serdes lane numbers 0, 9 or 10.
So with this change .serdes_get_lane will return lane number
or -errno (-ENODEV or -EOPNOTSUPP).

Signed-off-by: Pavana Sharma <pavana.sharma@digi.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 41 insertions, 41 deletions

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index 3195936dc5be..e48260c5c6ba 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -95,7 +95,7 @@ static int mv88e6xxx_serdes_pcs_get_state(struct mv88e6xxx_chip *chip,
 	return 0;
 }
 
-int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
 			   bool up)
 {
 	u16 val, new_val;
@@ -117,7 +117,7 @@ int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
 }
 
 int mv88e6352_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
-				u8 lane, unsigned int mode,
+				int lane, unsigned int mode,
 				phy_interface_t interface,
 				const unsigned long *advertise)
 {
@@ -166,7 +166,7 @@ int mv88e6352_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
 }
 
 int mv88e6352_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
-				   u8 lane, struct phylink_link_state *state)
+				   int lane, struct phylink_link_state *state)
 {
 	u16 lpa, status;
 	int err;
@@ -187,7 +187,7 @@ int mv88e6352_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
 }
 
 int mv88e6352_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
-				    u8 lane)
+				    int lane)
 {
 	u16 bmcr;
 	int err;
@@ -200,7 +200,7 @@ int mv88e6352_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
 }
 
 int mv88e6352_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
-				 u8 lane, int speed, int duplex)
+				 int lane, int speed, int duplex)
 {
 	u16 val, bmcr;
 	int err;
@@ -230,10 +230,10 @@ int mv88e6352_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
 	return mv88e6352_serdes_write(chip, MII_BMCR, bmcr);
 }
 
-u8 mv88e6352_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
+int mv88e6352_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 {
 	u8 cmode = chip->ports[port].cmode;
-	u8 lane = 0;
+	int lane = -ENODEV;
 
 	if ((cmode == MV88E6XXX_PORT_STS_CMODE_100BASEX) ||
 	    (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX) ||
@@ -245,7 +245,7 @@ u8 mv88e6352_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 
 static bool mv88e6352_port_has_serdes(struct mv88e6xxx_chip *chip, int port)
 {
-	if (mv88e6xxx_serdes_get_lane(chip, port))
+	if (mv88e6xxx_serdes_get_lane(chip, port) >= 0)
 		return true;
 
 	return false;
@@ -354,7 +354,7 @@ static void mv88e6352_serdes_irq_link(struct mv88e6xxx_chip *chip, int port)
 }
 
 irqreturn_t mv88e6352_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
-					u8 lane)
+					int lane)
 {
 	irqreturn_t ret = IRQ_NONE;
 	u16 status;
@@ -372,7 +372,7 @@ irqreturn_t mv88e6352_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
 	return ret;
 }
 
-int mv88e6352_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6352_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
 				bool enable)
 {
 	u16 val = 0;
@@ -413,10 +413,10 @@ void mv88e6352_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
 	}
 }
 
-u8 mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
+int mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 {
 	u8 cmode = chip->ports[port].cmode;
-	u8 lane = 0;
+	int lane = -ENODEV;
 
 	switch (port) {
 	case 5:
@@ -430,7 +430,7 @@ u8 mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 	return lane;
 }
 
-int mv88e6185_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6185_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
 			   bool up)
 {
 	/* The serdes power can't be controlled on this switch chip but we need
@@ -440,7 +440,7 @@ int mv88e6185_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
 	return 0;
 }
 
-u8 mv88e6185_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
+int mv88e6185_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 {
 	/* There are no configurable serdes lanes on this switch chip but we
 	 * need to return non-zero so that callers of
@@ -456,7 +456,7 @@ u8 mv88e6185_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 }
 
 int mv88e6185_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
-				   u8 lane, struct phylink_link_state *state)
+				   int lane, struct phylink_link_state *state)
 {
 	int err;
 	u16 status;
@@ -492,7 +492,7 @@ int mv88e6185_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
 	return 0;
 }
 
-int mv88e6097_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6097_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
 				bool enable)
 {
 	u8 cmode = chip->ports[port].cmode;
@@ -525,7 +525,7 @@ static void mv88e6097_serdes_irq_link(struct mv88e6xxx_chip *chip, int port)
 }
 
 irqreturn_t mv88e6097_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
-					u8 lane)
+					int lane)
 {
 	u8 cmode = chip->ports[port].cmode;
 
@@ -539,10 +539,10 @@ irqreturn_t mv88e6097_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
 	return IRQ_NONE;
 }
 
-u8 mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
+int mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 {
 	u8 cmode = chip->ports[port].cmode;
-	u8 lane = 0;
+	int lane = -ENODEV;
 
 	switch (port) {
 	case 9:
@@ -562,12 +562,12 @@ u8 mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 	return lane;
 }
 
-u8 mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
+int mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 {
 	u8 cmode_port = chip->ports[port].cmode;
 	u8 cmode_port10 = chip->ports[10].cmode;
 	u8 cmode_port9 = chip->ports[9].cmode;
-	u8 lane = 0;
+	int lane = -ENODEV;
 
 	switch (port) {
 	case 2:
@@ -638,7 +638,7 @@ u8 mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
 }
 
 /* Set power up/down for 10GBASE-R and 10GBASE-X4/X2 */
-static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, u8 lane,
+static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, int lane,
 				      bool up)
 {
 	u16 val, new_val;
@@ -665,7 +665,7 @@ static int mv88e6390_serdes_power_10g(struct mv88e6xxx_chip *chip, u8 lane,
 }
 
 /* Set power up/down for SGMII and 1000Base-X */
-static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, u8 lane,
+static int mv88e6390_serdes_power_sgmii(struct mv88e6xxx_chip *chip, int lane,
 					bool up)
 {
 	u16 val, new_val;
@@ -701,7 +701,7 @@ static struct mv88e6390_serdes_hw_stat mv88e6390_serdes_hw_stats[] = {
 
 int mv88e6390_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
 {
-	if (mv88e6390_serdes_get_lane(chip, port) == 0)
+	if (mv88e6390_serdes_get_lane(chip, port) < 0)
 		return 0;
 
 	return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
@@ -713,7 +713,7 @@ int mv88e6390_serdes_get_strings(struct mv88e6xxx_chip *chip,
 	struct mv88e6390_serdes_hw_stat *stat;
 	int i;
 
-	if (mv88e6390_serdes_get_lane(chip, port) == 0)
+	if (mv88e6390_serdes_get_lane(chip, port) < 0)
 		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
@@ -750,7 +750,7 @@ int mv88e6390_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
 	int i;
 
 	lane = mv88e6390_serdes_get_lane(chip, port);
-	if (lane == 0)
+	if (lane < 0)
 		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
@@ -761,7 +761,7 @@ int mv88e6390_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
 	return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
 }
 
-static int mv88e6390_serdes_enable_checker(struct mv88e6xxx_chip *chip, u8 lane)
+static int mv88e6390_serdes_enable_checker(struct mv88e6xxx_chip *chip, int lane)
 {
 	u16 reg;
 	int err;
@@ -776,7 +776,7 @@ static int mv88e6390_serdes_enable_checker(struct mv88e6xxx_chip *chip, u8 lane)
 				      MV88E6390_PG_CONTROL, reg);
 }
 
-int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
 			   bool up)
 {
 	u8 cmode = chip->ports[port].cmode;
@@ -801,7 +801,7 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, u8 lane,
 }
 
 int mv88e6390_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
-				u8 lane, unsigned int mode,
+				int lane, unsigned int mode,
 				phy_interface_t interface,
 				const unsigned long *advertise)
 {
@@ -860,7 +860,7 @@ int mv88e6390_serdes_pcs_config(struct mv88e6xxx_chip *chip, int port,
 }
 
 static int mv88e6390_serdes_pcs_get_state_sgmii(struct mv88e6xxx_chip *chip,
-	int port, u8 lane, struct phylink_link_state *state)
+	int port, int lane, struct phylink_link_state *state)
 {
 	u16 lpa, status;
 	int err;
@@ -883,7 +883,7 @@ static int mv88e6390_serdes_pcs_get_state_sgmii(struct mv88e6xxx_chip *chip,
 }
 
 static int mv88e6390_serdes_pcs_get_state_10g(struct mv88e6xxx_chip *chip,
-	int port, u8 lane, struct phylink_link_state *state)
+	int port, int lane, struct phylink_link_state *state)
 {
 	u16 status;
 	int err;
@@ -903,7 +903,7 @@ static int mv88e6390_serdes_pcs_get_state_10g(struct mv88e6xxx_chip *chip,
 }
 
 int mv88e6390_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
-				   u8 lane, struct phylink_link_state *state)
+				   int lane, struct phylink_link_state *state)
 {
 	switch (state->interface) {
 	case PHY_INTERFACE_MODE_SGMII:
@@ -922,7 +922,7 @@ int mv88e6390_serdes_pcs_get_state(struct mv88e6xxx_chip *chip, int port,
 }
 
 int mv88e6390_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
-				    u8 lane)
+				    int lane)
 {
 	u16 bmcr;
 	int err;
@@ -938,7 +938,7 @@ int mv88e6390_serdes_pcs_an_restart(struct mv88e6xxx_chip *chip, int port,
 }
 
 int mv88e6390_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
-				 u8 lane, int speed, int duplex)
+				 int lane, int speed, int duplex)
 {
 	u16 val, bmcr;
 	int err;
@@ -972,7 +972,7 @@ int mv88e6390_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
 }
 
 static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
-					    int port, u8 lane)
+					    int port, int lane)
 {
 	u16 bmsr;
 	int err;
@@ -989,7 +989,7 @@ static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
 }
 
 static int mv88e6390_serdes_irq_enable_sgmii(struct mv88e6xxx_chip *chip,
-					     u8 lane, bool enable)
+					     int lane, bool enable)
 {
 	u16 val = 0;
 
@@ -1001,7 +1001,7 @@ static int mv88e6390_serdes_irq_enable_sgmii(struct mv88e6xxx_chip *chip,
 				      MV88E6390_SGMII_INT_ENABLE, val);
 }
 
-int mv88e6390_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
+int mv88e6390_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, int lane,
 				bool enable)
 {
 	u8 cmode = chip->ports[port].cmode;
@@ -1017,7 +1017,7 @@ int mv88e6390_serdes_irq_enable(struct mv88e6xxx_chip *chip, int port, u8 lane,
 }
 
 static int mv88e6390_serdes_irq_status_sgmii(struct mv88e6xxx_chip *chip,
-					     u8 lane, u16 *status)
+					     int lane, u16 *status)
 {
 	int err;
 
@@ -1028,7 +1028,7 @@ static int mv88e6390_serdes_irq_status_sgmii(struct mv88e6xxx_chip *chip,
 }
 
 irqreturn_t mv88e6390_serdes_irq_status(struct mv88e6xxx_chip *chip, int port,
-					u8 lane)
+					int lane)
 {
 	u8 cmode = chip->ports[port].cmode;
 	irqreturn_t ret = IRQ_NONE;
@@ -1087,7 +1087,7 @@ static const u16 mv88e6390_serdes_regs[] = {
 
 int mv88e6390_serdes_get_regs_len(struct mv88e6xxx_chip *chip, int port)
 {
-	if (mv88e6xxx_serdes_get_lane(chip, port) == 0)
+	if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
 		return 0;
 
 	return ARRAY_SIZE(mv88e6390_serdes_regs) * sizeof(u16);
@@ -1102,7 +1102,7 @@ void mv88e6390_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
 	int i;
 
 	lane = mv88e6xxx_serdes_get_lane(chip, port);
-	if (lane == 0)
+	if (lane < 0)
 		return;
 
 	for (i = 0 ; i < ARRAY_SIZE(mv88e6390_serdes_regs); i++) {