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    Subject[PATCH net-next v3 06/10] net: dsa: mv88e6xxx: implement port_set_speed for mv88e6250
    Date
    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.

    Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
    ---
    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);
    --
    2.20.1
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