return 0;
 }
 
-static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed)
+static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth,
+                                  phy_interface_t interface, int speed)
 {
        u32 val;
        int ret;
 
+       if (interface == PHY_INTERFACE_MODE_TRGMII) {
+               mtk_w32(eth, TRGMII_MODE, INTF_MODE);
+               val = 500000000;
+               ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val);
+               if (ret)
+                       dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
+               return;
+       }
+
        val = (speed == SPEED_1000) ?
                INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100;
        mtk_w32(eth, val, INTF_MODE);
                                                              state->interface))
                                        goto err_phy;
                        } else {
-                               if (state->interface !=
-                                   PHY_INTERFACE_MODE_TRGMII)
-                                       mtk_gmac0_rgmii_adjust(mac->hw,
-                                                              state->speed);
+                               mtk_gmac0_rgmii_adjust(mac->hw,
+                                                      state->interface,
+                                                      state->speed);
 
                                /* mt7623_pad_clk_setup */
                                for (i = 0 ; i < NUM_TRGMII_CTRL; i++)