• Florian Fainelli's avatar
    net: dsa: Plug in PHYLINK support · aab9c406
    Florian Fainelli authored
    Add support for PHYLINK within the DSA subsystem in order to support more
    complex devices such as pluggable (SFP) and non-pluggable (SFF) modules, 10G
    PHYs, and traditional PHYs. Using PHYLINK allows us to drop some amount of
    complexity we had while probing fixed and non-fixed PHYs using Device Tree.
    
    Because PHYLINK separates the Ethernet MAC/port configuration into different
    stages, we let switch drivers implement those, and for now, we maintain
    functionality by calling dsa_slave_adjust_link() during
    phylink_mac_link_{up,down} which provides semantically equivalent steps.
    
    Drivers willing to take advantage of PHYLINK should implement the phylink_mac_*
    operations that DSA wraps.
    
    We cannot quite remove the adjust_link() callback just yet, because a number of
    drivers rely on that for configuring their "CPU" and "DSA" ports, this is done
    dsa_port_setup_phy_of() and dsa_port_fixed_link_register_of() still.
    
    Drivers that utilize fixed links for user-facing ports (e.g: bcm_sf2) will need
    to implement phylink_mac_ops from now on to preserve functionality, since PHYLINK
    *does not* create a phy_device instance for fixed links.
    Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    aab9c406
slave.c 38 KB