RT5133_PREDATA_LEN
int buf_len = RT5133_PREDATA_LEN + val_size + RT5133_I2C_CRC_LEN;
buf + RT5133_PREDATA_LEN);
crc = crc8(priv->crc8_tbls, buf, RT5133_PREDATA_LEN + val_size, 0);
if (crc != buf[RT5133_PREDATA_LEN + val_size]) {
memcpy(val_buf, buf + RT5133_PREDATA_LEN, val_size);
memcpy(buf + RT5133_PREDATA_LEN, data + RT5133_REG_ADDR_LEN,
buf + RT5133_PREDATA_LEN);
*(u8 *)(buf + RT5133_PREDATA_LEN));