[PATCH net] net: bcmgenet: Fix RGMII_MODE_EN value for GENET v1/2/3

[Florian Fainelli]

The RGMII_MODE_EN bit value was 0 for GENET versions 1 through 3, and
became 6 for GENET v4 and above, account for that difference.

Fixes: aa09677cba42 ("net: bcmgenet: add MDIO routines")
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.h | 1 +
 drivers/net/ethernet/broadcom/genet/bcmmii.c   | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h 
b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
index 4a8fc03d82fd..dbc69d8fa05f 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
@@ -366,6 +366,7 @@ struct bcmgenet_mib_counters {
 #define  EXT_PWR_DOWN_PHY_EN           (1 << 20)
 
 #define EXT_RGMII_OOB_CTRL             0x0C
+#define  RGMII_MODE_EN_V123            (1 << 0)
 #define  RGMII_LINK                    (1 << 4)
 #define  OOB_DISABLE                   (1 << 5)
 #define  RGMII_MODE_EN                 (1 << 6)
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c 
b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 94d1dd5d56bf..e7c291bf4ed1 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -258,7 +258,11 @@ int bcmgenet_mii_config(struct net_device *dev, bool init)
         */
        if (priv->ext_phy) {
                reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL);
-               reg |= RGMII_MODE_EN | id_mode_dis;
+               reg |= id_mode_dis;
+               if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv))
+                       reg |= RGMII_MODE_EN_V123;
+               else
+                       reg |= RGMII_MODE_EN;
                bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
        }
 
-- 
2.17.1