Master-Slave Communication Between Two Jetson Nano over SPI

[ShaneCCC]

Did you modify the device tree for slave mode.
Modify the compatible as below.
compatible = “nvidia,tegra210-spi-slave”;

Have reference to below topic for SPI slave mode configure.

How to set to spi slave mode

I still get the error though. Instead of flashing by modifying pinmux, I used devmem2 to temporarily change the register value. [Screenshot from 2020-10-07 15-22-52] when checking dmesg, the following error appears. [ 280.340212] spi-tegra124-slave 3230000.spi: Tx is not supported in mode 0 [ 280.340215] spi-tegra124-slave 3230000.spi: spi can not start transfer, err -22 [ 280.340301] spi_master spi2: failed to transfer one message from queue