net: bcmgenet: power on MII block for all MII modes

The RGMII block is currently only powered on when using RGMII or
RGMII_NO_ID, which is not correct when using the GENET interface in MII
or Reverse MII modes. We always need to power on the RGMII interface for
this block to properly work, regardless of the MII mode in which we
operate.

Fixes: aa09677cba423 ("net: bcmgenet: add MDIO routines")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index e7651b3c6c57..420949cc55aa 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -299,9 +299,6 @@ int bcmgenet_mii_config(struct net_device *dev, bool init)
                         phy_name = "external RGMII (no delay)";
                 else
                         phy_name = "external RGMII (TX delay)";
-                reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL);
-                reg |= RGMII_MODE_EN | id_mode_dis;
-                bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
                 bcmgenet_sys_writel(priv,
                                     PORT_MODE_EXT_GPHY, SYS_PORT_CTRL);
                 break;
@@ -310,6 +307,15 @@ int bcmgenet_mii_config(struct net_device *dev, bool init)
                 return -EINVAL;
         }
 
+        /* This is an external PHY (xMII), so we need to enable the RGMII
+         * block for the interface to work
+         */
+        if (priv->ext_phy) {
+                reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL);
+                reg |= RGMII_MODE_EN | id_mode_dis;
+                bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
+        }
+
         if (init)
                 dev_info(kdev, "configuring instance for %s\n", phy_name);