centos man page for phy_read_mmd_indirect

PHY_READ_MMD_INDIREC(9) 				      Network device support					   PHY_READ_MMD_INDIREC(9)

NAME
       phy_read_mmd_indirect - reads data from the MMD registers

SYNOPSIS
       int phy_read_mmd_indirect(struct mii_bus * bus, int prtad, int devad, int addr);

ARGUMENTS
       bus
	   the target MII bus

       prtad
	   MMD Address

       devad
	   MMD DEVAD

       addr
	   PHY address on the MII bus

DESCRIPTION
       it reads data from the MMD registers (clause 22 to access to clause 45) of the specified phy address.

TO READ THESE REGISTER WE HAVE
       1) Write reg 13 // DEVAD 2) Write reg 14 // MMD Address 3) Write reg 13 // MMD Data Command for MMD DEVAD 3) Read reg 14 // Read MMD data

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   PHY_READ_MMD_INDIREC(9)