• Vivien Didelot's avatar
    net: dsa: mv88e6xxx: use 4-bit port for PVT data · 81228996
    Vivien Didelot authored
    The Cross-chip Port Based VLAN Table (PVT) supports two indexing modes,
    one using 5-bit for device and 4-bit for port, the other using 4-bit for
    device and 5-bit for port, configured via the Global 2 Misc register.
    
    Only 4 bits for the source port are needed when interconnecting 88E6xxx
    switch devices since they all support less than 16 physical ports. The
    full 5 bits are needed when interconnecting a device with 98DXxxx switch
    devices since they support more than 16 physical ports.
    
    Add a mv88e6xxx_pvt_setup helper to set the 4-bit port PVT mode, which
    will be extended later to also initialize the PVT content.
    Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    81228996
global2.c 22.4 KB