PA6_RG_U2_PRE_EMP
mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_PRE_EMP,
val = FIELD_GET(PA6_RG_U2_PRE_EMP, tmp);
max = FIELD_MAX(PA6_RG_U2_PRE_EMP);
mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_PRE_EMP, val);