+static int ksz9477_errata(struct dsa_switch *ds)
+{
+       struct ksz_device *dev = ds->priv;
+       u16 val;
+       int p;
+
+       /* KSZ9477 Errata DS80000754C
+        *
+        * Module 4: Energy Efficient Ethernet (EEE) feature select must be
+        * manually disabled
+        *   The EEE feature is enabled by default, but it is not fully
+        *   operational. It must be manually disabled through register
+        *   controls. If not disabled, the PHY ports can auto-negotiate
+        *   to enable EEE, and this feature can cause link drops when linked
+        *   to another device supporting EEE.
+        *
+        *   Only PHY ports (dsa user) [0-4] need to have the EEE advertisement
+        *   bits cleared.
+        */
+
+       for (p = 0; p < ds->num_ports; p++) {
+               if (!dsa_is_user_port(ds, p))
+                       continue;
+
+               ksz9477_port_mmd_read(dev, p, MMD_DEVICE_ID_EEE_ADV,
+                                     MMD_EEE_ADV, &val, 1);
+
+               pr_err("%s: PORT: %d val: 0x%x pc: %d\n", __func__, p, val,
+                      ds->num_ports);
+
+               val &= ~(EEE_ADV_100MBIT | EEE_ADV_1GBIT);
+               ksz9477_port_mmd_write(dev, p, MMD_DEVICE_ID_EEE_ADV,
+                                      MMD_EEE_ADV, &val, 1);
+       }
+
+       return 0;
+}
+
 int ksz9477_setup(struct dsa_switch *ds)
 {
        struct ksz_device *dev = ds->priv;

@@ -1157,7 +1195,7 @@ int ksz9477_setup(struct dsa_switch *ds)
        /* enable global MIB counter freeze function */
        ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true);

-       return 0;
+       return ksz9477_errata(ds);
 }