IOCTL Driver

Simple example on how to create a IOCTL driver for Linux. This can be used for simple testing purposes:

Access to a special register from kernel mode to get the result in user mode. For example Arm register from CP15 processor.
Access to some memory mapped region
...

This repo contains the following folders:

dev/ : driver source code

ioctl_interface.c is the source code of the driver. The function that should be modified to add more IOCTL
ioctl_dev.h is the header file
ioctl.h contains the list of IOCTL codes. This list is also included in the application
Makefile to build the driver. If the driver is cross-compiled, the variable KDEV should be adjusted

app/ : application source code

ioctl_app.c shows an example to access the driver and get the returned value
Makefile to build the application

load_driver.sh

Load the driver ioctl. This probably needs sudo permissions!