tg3 / broadcom: Refine AC131 APD support

Auto power-down (APD) support is a power-saving feature.  It should be
selectively enabled since it might expose MAC bugs.  This patch changes
the code to enable APD only if the PHY_BRCM_AUTO_PWRDWN_ENABLE flag is
set.  The tg3 driver was changed to set this bit.

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, 5 insertions, 3 deletions

diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
index 5d2a2e90aba8..bddf4a42ae68 100644
--- a/drivers/net/phy/broadcom.c
+++ b/drivers/net/phy/broadcom.c
@@ -561,9 +561,11 @@ static int brcm_fet_config_init(struct phy_device *phydev)
         if (err < 0)
                 goto done;
 
-        /* Enable auto power down */
-        err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2,
-                                       MII_BRCM_FET_SHDW_AS2_APDE);
+        if (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE) {
+                /* Enable auto power down */
+                err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2,
+                                               MII_BRCM_FET_SHDW_AS2_APDE);
+        }
 
 done:
         /* Disable shadow register access */