[TG3]: Power down 5704 serdes transceiver when shutting down.

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

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b6615f112eaa..604f3085d12a 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1175,8 +1175,18 @@ static void tg3_nvram_unlock(struct tg3 *);
 
 static void tg3_power_down_phy(struct tg3 *tp)
 {
-        if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)
+        if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES) {
+                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) {
+                        u32 sg_dig_ctrl = tr32(SG_DIG_CTRL);
+                        u32 serdes_cfg = tr32(MAC_SERDES_CFG);
+
+                        sg_dig_ctrl |=
+                                SG_DIG_USING_HW_AUTONEG | SG_DIG_SOFT_RESET;
+                        tw32(SG_DIG_CTRL, sg_dig_ctrl);
+                        tw32(MAC_SERDES_CFG, serdes_cfg | (1 << 15));
+                }
                 return;
+        }
 
         if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
                 u32 val;