/dev/ttyRPMSG0 /dev/ttyRPMSG0 not getting created after insmo of rpmsg_tty.ko

[GChin.1]

I am using OSTL 4.1.1 and build DISTRO=openstlinux-weston MACHINE=stm32mp15-disco. I am using STM32MP157F-DK2. Found that rpmsg_tty build as dyanamic module. I have loaded rpmsg_tty.ko with modprobe but found that node entries are not getting created in /dev

[Erwan SZYMANSKI]

Hello @GChin.1 ,
Are you sure you have a firmware running on Cortex M4 that initalize the RPMSG communication ? 
If not, please follow this wiki to make it work : 

https://wiki.st.com/stm32mpu-ecosystem-v4/wiki/Getting_started/STM32MP1_boards/STM32MP157x-DK2/Develop_on_Arm%C2%AE_Cortex%C2%AE-M4/Install_STM32CubeMP1_package 

and then 

https://wiki.st.com/stm32mpu-ecosystem-v4/wiki/Getting_started/STM32MP1_boards/STM32MP157x-DK2/Develop_on_Arm%C2%AE_Cortex%C2%AE-M4/Modify,_rebuild_and_reload_a_firmware

This last one show you the OpenAMP_TTY_Echo example that initialize this coprocessor communication.

Kind regards,
Erwan.