U3P_U3_PHYA_DA_REG0
mtk_phy_update_field(phya + U3P_U3_PHYA_DA_REG0, P3A_RG_XTAL_EXT_EN_U3, 2);
mtk_phy_update_bits(phya + U3P_U3_PHYA_DA_REG0,