Just to be consistent with my driver development, I would like to
understand more about the usage of tx_bufs and rx_bufs arguments
to function spi_transceive.
I understand that if tx_bufs is NULL, it is half-deplex rx
transfer and if rx_bufs is null, half-duplex tx.
What if I have a transfer in which first few bytes are tx and
remaining bytes are rx (similar to FRAM write/read for example)?
Can I set rx_bufs[0].buf as NULL and rx_bufs[1].len as 0? Or do I
need to pass rx_bufs[1].len same as tx_bufs[1].len and provide
some memory buffer for rx_bufs[0].buf? What about tx_bufs[1]?
I would like to understand these arguments so that my driver is
in consistent with API.
