RPmsg in pico-imx7d using mainline linux (5.6.xx) and Yocto dunfell

Neuber Sousa <neuberfran@...>

I have been interested in communicating between the a7 and the m4 of my imx7d-pico using RPmsg for a long time.

Today I found that this tutorial:https://www.youtube.com/watch?v=4zMyjaEgj2U&t=1182s

I don’t use mainline linux. I stay using kernel 5.6.xx with libgpiod 1.5

Using libgpiod I want to press a controlled button on a7 and flash an LED (which is waiting for this command) on m4


I was checking the issue link below and I have 2 questions below:


1 - How can I adapt this project:https://hub.mender.io/t/technexion-pico-pi-imx7/136/6 

to the nxp forum project (link above) for me to get the following files: mu.c, imx_rpmsg.c, imx_rpmsg_tty.c and/or imx_rpmsg_tty.ko

2 - What is the best way to do RPmsg communication between a7 and m4 using Yocto on a7?

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