diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c
index 89b5b19a9bd2..dc9569a39cb4 100644
--- a/drivers/net/phy/motorcomm.c
+++ b/drivers/net/phy/motorcomm.c
@@ -910,6 +910,10 @@ static int ytphy_rgmii_clk_delay_config(struct phy_device *phydev)
 		val |= FIELD_PREP(YT8521_RC1R_RX_DELAY_MASK, rx_reg) |
 		       FIELD_PREP(YT8521_RC1R_GE_TX_DELAY_MASK, tx_reg);
 		break;
+	case PHY_INTERFACE_MODE_GMII:
+		if (phydev->drv->phy_id != PHY_ID_YT8531S)
+			return -EOPNOTSUPP;
+		return 0;
 	default: /* do not support other modes */
 		return -EOPNOTSUPP;
 	}