Check LICENSE on root folder for LICENSE RELATED INFORMATION

This driver is greatly inspired from http://brevera.in/blog/software/mini-uart-driver-for-raspberry-pi/

• First you would need to find your kernel version

uname -r

• Then download the Linux source (you can just apt-get the source, but the one bundled with Debian system doesn't seem to work) corresponding to your kernel version

cd /usr/src
wget https://github.com/raspberrypi/linux/archive/rpi-3.18.y.zip

Then unzip it:

unzip rpi-3.18.y
mv linux-rpi-3.18.y linux

You might even have to upgrade gcc because some gcc version are flagged dangerous for compilations.

• Now create a symlink of the Linux source

ln -s /usr/src/linux /lib/modules/3.18.14+/build

• Navigate to the recently created directory symlink, and run following commands:

make mrproper
gzip -dc /proc/config.gz > .config
make modules_prepare

• You will then need module version information stored in a file Module.symvers. You can compile the whole kernel in the rapi to obtain it, but it is not recommended. Fortunately, Module.symvers has already been generated for our ease.

It can be found in:

https://github.com/raspberrypi/firmware/tree/master/extra

The kernel version I am working on is 3.18.14+ so my file would be:

wget https://raw.githubusercontent.com/raspberrypi/firmware/70b05985cf2b2b893bc6e55b12794f32857a78dd/extra/Module.symvers

You can look through the commit history and decide which commit has your file.

• Run depmod -a

• Clone this repo

git clone https://github.com/arunpoudel/RPI_mini_UART.git
make