Hi Roelof,
You are correct that "Auto-detection" from the MAC_CR does not have anything to
do with the PHY Auto-negotiation or with access to the PHY's registers being
done by the MAC over MDIO. Auto-detection just a way for the MAC to
automatically set it's speed and duplex mode, determined by
Microchip's internal convention is for register (offset) definitions to be
capitalized (i.e.: MY_REGISTER). Our convention for bits (position) definitions
within a register is to carry as a prefix the name of the register and suffix
it with the bit name and adding a trailing underscore (i.e.
MY
