KernelDriverProgrammingCourse2015/PreparationDay2
Introduction
For the second day of this course we will actually be building our own kernel and work on writing our first own driver. This builds on top of the preparations and [[KernelDriverProgrammingCourse2015/OutlineDay1 | activitiers] from the first course day.
Preparation
If you've not done so already first walk through the [[KernelDriverProgrammingCourse2015/Preparations | preparations from day 1].
Since building a kernel from scratch can take a long time, it is a good idea to build the kernel beforehand:
1) cd into the linux directory:
cd linux
1) Update your kernel tree to my latest sunxi-wip branch
git remote update git checkout -B sunxi-wip jwrdegoede/sunxi-wip
2) Make sure that you've the latest kernel configuration:
wget https://fedorapeople.org/~jwrdegoede/kernel-driver-programming/kernel-config mv kernel-config .config
3) And build the kernel
make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnu- oldconfig make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnu- zImage dtbs
This will take a while, once this is done (assuming there are no errors), you are all set for the second day of the course.