Hi notthetup
The CS_ACTIVE_BETWEEN_PACKETS and CYCLES_BETWEEN_PACKETS are implement after r24.2, for the TK1(r21) I made a patch pull from r24 but not verify it yet. You need add below information in the DT.
nvidia,clk-delay-between-packets : delay in terms of clock required between each packet
nvidia,chipselect-gpio: gpio value of the chip select in use for this client device. (SPI chip select will be left in gpio mode to emulate active delay while hardware does inactive delay)
spi.tar.gz (3.33 KB)