Skip to content

Latest commit

 

History

History
23 lines (16 loc) · 879 Bytes

README.md

File metadata and controls

23 lines (16 loc) · 879 Bytes
Raw

GPIOchip Driver for Rpmsg Communication

The gpiochip module provides a sysfs interface to communicate using rpmsg with the PRUs.

Required Headers for Building modules

If you have already built modules on your machine earlier you would be having the headers already installed. You might skip this step

apt-cache search linux-headers-$(uname -r)
sudo apt install linux-headers-$(uname -r)

How to Build and Insert the Module

make
sudo insmod gpiochip.ko

Using the module with RPmsg Code.

The gpiochip module is probed when the PRU code is started. It is very important to have the CHAN NAME set to " rpmsg-pru-gpio" to make sure this driver is used and not the character driver. Also make sure that gpiochip module is loaded before starting the PRU.

cd /sys/class/remoteproc/remoteproc1
sudo start > state

Removing the Module

sudo rmmod gpiochip.ko