[TG3]: Disable GPHY autopowerdown

New CPMU devices contend with the GPHY for power management.  The GPHY
autopowerdown feature is enabled by default in the PHY and thus needs to
be disabled after every PHY reset.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 25e57d8ddb51..b5c4799003e0 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1117,6 +1117,12 @@ static int tg3_phy_reset(struct tg3 *tp)
                         udelay(40);
                         tw32_f(TG3_CPMU_LSPD_1000MB_CLK, val);
                 }
+
+                /* Disable GPHY autopowerdown. */
+                tg3_writephy(tp, MII_TG3_MISC_SHDW,
+                             MII_TG3_MISC_SHDW_WREN |
+                             MII_TG3_MISC_SHDW_APD_SEL |
+                             MII_TG3_MISC_SHDW_APD_WKTM_84MS);
         }
 
 out: