GOODIX_SPI_WRITE_PREFIX_LEN
if (GOODIX_SPI_WRITE_PREFIX_LEN + len > sizeof(ts->xfer_buf)) {
sizeof(ts->xfer_buf) - GOODIX_SPI_WRITE_PREFIX_LEN);
memcpy(ts->xfer_buf + GOODIX_SPI_WRITE_PREFIX_LEN, data, len);
xfers.len = GOODIX_SPI_WRITE_PREFIX_LEN + len;