HCC_ISOC_THRES
HCC_ISOC_THRES(params),
ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
oxu->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
[HCC_ISOC_THRES] = REG_FIELD(ISP176x_HC_HCCPARAMS, 4, 6),
isoc_thres = isp1760_hcd_read(hcd, HCC_ISOC_THRES);