i.MX ProcessorsのトピックRe: Imx93 spi interface

Imx93 spi interface

Ash2608 — Wed, 10 Apr 2024 12:28:50 GMT

Hello everyone,

I'm currently working on testing the SPI interface on an iWave i.MX93 board. The SPI pins are configured from the expansion connector, but I'm facing an issue where I can't seem to locate the /dev/spi node on the processor.

Could anyone provide guidance on how to proceed with testing the SPI interface without /dev/spi node? Any step-by-step instructions or suggestions would be greatly appreciated.

Thank you in advance for your help!

Best regards,
Ash

Re: Imx93 spi interface

JorgeCas — Wed, 10 Apr 2024 18:13:59 GMT

Hello,

I suggest you take a look on our reference device tree used on EVK board.

imx93-11x11-evk-lpspi.dts

imx93-11x11-evk-lpspi-slave.dts

Maybe iWave has a reference device for your board.

Best regards.

Re: Imx93 spi interface

EulerCsLin — Thu, 20 Jun 2024 07:31:55 GMT

Dear,

I am working on i.MX93 EVK and faceing the same issue either.

I had tried to boot from the dtb as mentioned in JorgeCas's reply.

If boot system with imx93-11x11-evk-lpspi.dts, I did see the device node, namely spidev0.0.
For booting with imx93-11x11-evk-lpspi-slave.dts, I can't see the device node spidev0.0 but can see the content changes in /sys/class/spi_slave.

My question is how to program with the spi slave without device node.
Any example code for the spi slave usage?