tg3: 5785: Set port mode to MII when link down

This patch sets the port mode to MII when the link is down for the 5785.
Setting the port mode to MII instead of GMII saves power.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 003ab53cf613..d726da8c5930 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1363,8 +1363,11 @@ static void tg3_adjust_link(struct net_device *dev)
 
                 if (phydev->speed == SPEED_100 || phydev->speed == SPEED_10)
                         mac_mode |= MAC_MODE_PORT_MODE_MII;
-                else
+                else if (phydev->speed == SPEED_1000 ||
+                         GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785)
                         mac_mode |= MAC_MODE_PORT_MODE_GMII;
+                else
+                        mac_mode |= MAC_MODE_PORT_MODE_MII;
 
                 if (phydev->duplex == DUPLEX_HALF)
                         mac_mode |= MAC_MODE_HALF_DUPLEX;