• Martin Blumenstingl's avatar
    dt-bindings: net: phy: add bindings for the IC Plus Corp. IP101A/G PHYs · fdc13a9e
    Martin Blumenstingl authored
    The IP101A and IP101G series both have various models. Depending on the
    board implementation we need a special property for the IP101GR (32-pin
    LQFP package) PHY:
    pin 21 ("RXER/INTR_32") outputs the "receive error" signal by default
    (LOW means "normal operation", HIGH means that there's either a decoding
    error of the received signal or that the PHY is receiving LPI). This pin
    can also be switched to INTR32 mode, where the interrupt signal is
    routed to this pin. The other PHYs don't need this special handling
    because they have more pins available so the interrupt function gets a
    dedicated pin.
    
    This adds two properties to either select the "receive error" or
    "interrupt" function of pin 21. Not specifying any function means that
    the default set by the bootloader is used. This is required because the
    IP101GR cannot be differentiated between other IP101 PHYs as the PHY
    identification registers on all of these is 0x02430c54.
    
    The IP101G (sold as die only, without package) may suffer from the same
    issue depending on how it's integrated into a multi chip package by
    another manufacturer. If only the RXER/INTR_32 pin is routed then the
    users of the die-only variant may also have to explicitly configure the
    mode of hte RXER/INTR_32 pin. This is the reason why no "is-ip101gr"
    property was added. I have no evidence though which would confirm this
    theory - so the binding itself is independent of that.
    Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
    Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    fdc13a9e
icplus-ip101ag.txt 650 Bytes