Yocto 5.15.32 ecspi slave mode

[joshua_jhan]

Hi All,

I try to use ecspi slave mode on iMX8M Mini / Yocto 5.15.32

but when I change the dtb file "imx8mm-evk-ecspi-slave.dtb" and following below step to setup, the spidev node is not generated

root@imx8mmevk:~# uname -a
Linux imx8mmevk 5.15.32-lts-next+gfa6c3168595c #1 SMP PREEMPT Tue Jun 7 02:34:46 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
root@imx8mmevk:~# ls /dev/spidev1.0
ls: cannot access '/dev/spidev1.0': No such file or directory
root@imx8mmevk:~# echo spidev > /sys/class/spi_slave/spi1/slave
root@imx8mmevk:~# ls /dev/spidev1.0
ls: cannot access '/dev/spidev1.0': No such file or directory

so, how can I generate the ecspi slave node or used it

Thanks

[Dhruvit]

Hi @joshua_jhan,

Please refer to the following reference links,

• https://github.com/boundarydevices/linux/blob/boundary-imx_4.14.x_1.0.0_ga/arch/arm64/boot/dts/frees... 
• https://www.nxp.com/docs/en/application-note/AN13633.pdf 

Best Regards,
Dhruvit.

[lljwork2021]

I met the same problem, and it was successful in 4.14, but failed in 5.15. May I ask how to solve it?