:: RootR ::  Hosting Order Map Login   Secure Inter-Network Operations  
 
phy_poll_reset(9) - phpMan

Command: man perldoc info search(apropos)  


PHY_POLL_RESET(9)                     Network device support                    PHY_POLL_RESET(9)



NAME
       phy_poll_reset - Safely wait until a PHY reset has properly completed

SYNOPSIS
       int phy_poll_reset(struct phy_device * phydev);

ARGUMENTS
       phydev
           The PHY device to poll

DESCRIPTION
       According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as published in 2008, a PHY
       reset may take up to 0.5 seconds. The MII BMCR register must be polled until the
       BMCR_RESET bit clears.

       Furthermore, any attempts to write to PHY registers may have no effect or even generate
       MDIO bus errors until this is complete.

       Some PHYs (such as the Marvell 88E1111) don't entirely conform to the standard and do not
       fully reset after the BMCR_RESET bit is set, and may even *REQUIRE* a soft-reset to
       properly restart autonegotiation. In an effort to support such broken PHYs, this function
       is separate from the standard phy_init_hw which will zero all the other bits in the BMCR
       and reapply all driver-specific and board-specific fixups.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                         PHY_POLL_RESET(9)


/man
rootr.net - man pages