net: dsa: mv88e6xxx: support 2500base-x in SGMII IRQ handler
The mv88e6390_serdes_irq_link_sgmii IRQ handler reads the SERDES PHY status register to determine speed, among other things. If cmode of the port is set to 2500base-x, though, the PHY still reports 1000 Mbps (the PHY register itself does not differentiate between 1000 Mbps and 2500 Mbps - it thinks it is running at 1000 Mbps, although clock is 2.5x faster). Look at the cmode and set SPEED_2500 if cmode is set to 2500base-x. Also tell mv88e6xxx_port_setup_mac the PHY interface mode corresponding to current cmode in terms of phy_interface_t. Signed-off-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Vivien Didelot <vivien.didelot@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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