NULL, NULL, NULL,
 };
 
+/*
+ * Mapping of all 18 SERDES lanes to board slots. A value of '0' here means
+ * that the mapping must be determined dynamically, or that the lane maps to
+ * something other than a board slot.
+ */
+static u8 lane_to_slot[] = {
+       1, 1, 2, 2, 3, 3, 3, 3, 6, 6, 4, 4, 4, 4, 5, 5, 5, 5
+};
+
 static char *p4080ds_mdio_name_for_muxval(u32 muxval)
 {
        return mdio_names[(muxval & EMI_MASK) >> 28];
        }
 }
 
-enum board_slots {
-       SLOT1 = 1,
-       SLOT2,
-       SLOT3,
-       SLOT4,
-       SLOT5,
-       SLOT6,
-};
-
 int board_eth_init(bd_t *bis)
 {
 #ifdef CONFIG_FMAN_ENET
        struct fsl_pq_mdio_info dtsec_mdio_info;
        struct tgec_mdio_info tgec_mdio_info;
 
-       u8 lane_to_slot[] = {
-               SLOT1, /* 0 - Bank 1:A */
-               SLOT1, /* 1 - Bank 1:B */
-               SLOT2, /* 2 - Bank 1:C */
-               SLOT2, /* 3 - Bank 1:D */
-               SLOT3, /* 4 - Bank 1:E */
-               SLOT3, /* 5 - Bank 1:F */
-               SLOT3, /* 6 - Bank 1:G */
-               SLOT3, /* 7 - Bank 1:H */
-               SLOT6, /* 8 - Bank 1:I */
-               SLOT6, /* 9 - Bank 1:J */
-               SLOT4, /* 10 - Bank 2:A */
-               SLOT4, /* 11 - Bank 2:B */
-               SLOT4, /* 12 - Bank 2:C */
-               SLOT4, /* 13 - Bank 2:D */
-               SLOT5, /* 14 - Bank 3:A */
-               SLOT5, /* 15 - Bank 3:B */
-               SLOT5, /* 16 - Bank 3:C */
-               SLOT5, /* 17 - Bank 3:D */
-       };
-
        /* Initialize the mdio_mux array so we can recognize empty elements */
        for (i = 0; i < NUM_FM_PORTS; i++)
                mdio_mux[i] = EMI_NONE;
                                break;
                        slot = lane_to_slot[lane];
                        switch (slot) {
-                       case SLOT3:
+                       case 3:
                                mdio_mux[i] = EMI1_SLOT3;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT4:
+                       case 4:
                                mdio_mux[i] = EMI1_SLOT4;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT5:
+                       case 5:
                                mdio_mux[i] = EMI1_SLOT5;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
                        slot = lane_to_slot[lane];
                        switch (slot) {
-                       case SLOT4:
+                       case 4:
                                mdio_mux[i] = EMI2_SLOT4;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT5:
+                       case 5:
                                mdio_mux[i] = EMI2_SLOT5;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
                        slot = lane_to_slot[lane];
                        switch (slot) {
-                       case SLOT3:
+                       case 3:
                                mdio_mux[i] = EMI1_SLOT3;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT4:
+                       case 4:
                                mdio_mux[i] = EMI1_SLOT4;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT5:
+                       case 5:
                                mdio_mux[i] = EMI1_SLOT5;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
                        slot = lane_to_slot[lane];
                        switch (slot) {
-                       case SLOT4:
+                       case 4:
                                mdio_mux[i] = EMI2_SLOT4;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));
                                break;
-                       case SLOT5:
+                       case 5:
                                mdio_mux[i] = EMI2_SLOT5;
                                fm_info_set_mdio(i,
                                        mii_dev_for_muxval(mdio_mux[i]));