Adding /dev/gpiomem

#1

Would it be possible to port the /dev/gpiomem character kernel driver to Rock Pi S? This looks like it would be fairly straightforward. I just want the ability to map the GPIO memory into user space. I took a look into it but I am fighting with tool chains. I do not want to upgrade off mainline kernel at the moment.

How long before this would make it to a kernel upgrade in apt for Rock Pi S running Ubuntu or something like that?

#2

To map GPIO memory, we usually use /dev/mem, you can try it.

#3

I would like to map GPIO memory without needing root or daemon, if possible.

#4

Maybe you need the function “setuid” to change the permissions of common users.

#5

It probably already exists. Official Armbian 22.08 for Rockpi S