HC_CHIP_REV
[HC_CHIP_REV] = REG_FIELD(ISP176x_HC_CHIP_ID, 16, 31),
[HC_CHIP_REV] = REG_FIELD(ISP1763_HC_CHIP_REV, 0, 7),
chip_rev = isp1760_hcd_read(hcd, HC_CHIP_REV);
chip_rev = isp1760_hcd_read(hcd, HC_CHIP_REV);