1. 24 Apr, 2017 1 commit
    • Roger Quadros's avatar
      mdio_bus: Issue GPIO RESET to PHYs. · 69226896
      Roger Quadros authored
      
      
      Some boards [1] leave the PHYs at an invalid state
      during system power-up or reset thus causing unreliability
      issues with the PHY which manifests as PHY not being detected
      or link not functional. To fix this, these PHYs need to be RESET
      via a GPIO connected to the PHY's RESET pin.
      
      Some boards have a single GPIO controlling the PHY RESET pin of all
      PHYs on the bus whereas some others have separate GPIOs controlling
      individual PHY RESETs.
      
      In both cases, the RESET de-assertion cannot be done in the PHY driver
      as the PHY will not probe till its reset is de-asserted.
      So do the RESET de-assertion in the MDIO bus driver.
      
      [1] - am572x-idk, am571x-idk, a437x-idk
      Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      69226896