From a528e5be6b5f8026eda029b03340dcfa23c70824 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Tue, 4 Jun 2019 07:34:29 +0000 Subject: [PATCH] net: dsa: mv88e6xxx: implement port_set_speed for mv88e6250 The data sheet also mentions the possibility of selecting 200 Mbps for the MII ports (ports 5 and 6) by setting the ForceSpd field to 0x2 (aka MV88E6065_PORT_MAC_CTL_SPEED_200). However, there's a note that "actual speed is determined by bit 8 above", and flipping back a page, one finds that bits 13:8 are reserved... So without further information on what bit 8 means, let's stick to supporting just 10 and 100 Mbps on all ports. Reviewed-by: Andrew Lunn Signed-off-by: Rasmus Villemoes Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/port.c | 12 ++++++++++++ drivers/net/dsa/mv88e6xxx/port.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c index c44b2822e4dd..a41bca17cba1 100644 --- a/drivers/net/dsa/mv88e6xxx/port.c +++ b/drivers/net/dsa/mv88e6xxx/port.c @@ -294,6 +294,18 @@ int mv88e6185_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed) return mv88e6xxx_port_set_speed(chip, port, speed, false, false); } +/* Support 10, 100 Mbps (e.g. 88E6250 family) */ +int mv88e6250_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed) +{ + if (speed == SPEED_MAX) + speed = 100; + + if (speed > 100) + return -EOPNOTSUPP; + + return mv88e6xxx_port_set_speed(chip, port, speed, false, false); +} + /* Support 10, 100, 200, 1000, 2500 Mbps (e.g. 88E6341) */ int mv88e6341_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed) { diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h index 39c85e98fb92..1957e3e1cf47 100644 --- a/drivers/net/dsa/mv88e6xxx/port.h +++ b/drivers/net/dsa/mv88e6xxx/port.h @@ -279,6 +279,7 @@ int mv88e6xxx_port_set_duplex(struct mv88e6xxx_chip *chip, int port, int dup); int mv88e6065_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); int mv88e6185_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); +int mv88e6250_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); int mv88e6341_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); int mv88e6352_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); int mv88e6390_port_set_speed(struct mv88e6xxx_chip *chip, int port, int speed); -- 2.30.2