MT6360_CRC_PREDATA_OFFSET
buf + MT6360_CRC_PREDATA_OFFSET);
crc = crc8(ddata->crc8_tbl, buf, val_size + MT6360_CRC_PREDATA_OFFSET, 0);
if (crc != buf[val_size + MT6360_CRC_PREDATA_OFFSET])
memcpy(val, buf + MT6360_CRC_PREDATA_OFFSET, val_size);
memcpy(buf + MT6360_CRC_PREDATA_OFFSET, val + MT6360_REGMAP_REG_BYTE_SIZE, write_size);
buf + MT6360_CRC_PREDATA_OFFSET);