1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 3297604f8216..289e20443d83 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -696,9 +696,20 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
         }
 
         /* Include the pseudo-PHY address and the broadcast PHY address to
-         * divert reads towards our workaround
+         * divert reads towards our workaround. This is only required for
+         * 7445D0, since 7445E0 disconnects the internal switch pseudo-PHY such
+         * that we can use the regular SWITCH_MDIO master controller instead.
+         *
+         * By default, DSA initializes ds->phys_mii_mask to ds->phys_port_mask
+         * to have a 1:1 mapping between Port address and PHY address in order
+         * to utilize the slave_mii_bus instance to read from Port PHYs. This is
+         * not what we want here, so we initialize phys_mii_mask 0 to always
+         * utilize the "master" MDIO bus backed by the "mdio-unimac" driver.
          */
-        ds->phys_mii_mask |= ((1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0));
+        if (of_machine_is_compatible("brcm,bcm7445d0"))
+                ds->phys_mii_mask |= ((1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0));
+        else
+                ds->phys_mii_mask = 0;
 
         rev = reg_readl(priv, REG_SWITCH_REVISION);
         priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &