debian-peppy-touchpad.sh

# Create a temporary directory
tempbuild=`mktemp -d`
cd $tempbuild

# Determine kernel version
mykern=${1:-$(uname -r)}

# Install necessary packages
sudo apt-get build-dep -y --no-install-recommends linux

# Download the kernel source
sudo apt-get source linux
cd linux*

if [ -f drivers/platform/x86/chromeos_laptop.c ]; then
  platform_folder=x86
elif [ -f drivers/platform/chrome/chromeos_laptop.c ]; then
  platform_folder=chrome
fi

# Use Benson Leung's patches:
# https://patchwork.kernel.org/bundle/bleung/chromeos-laptop-deferring-and-haswell/
for patch in 3078491 3078481 3074391 3074441 3074421 3074401 3074431 3074411; do
  wget -O - https://patchwork.kernel.org/patch/$patch/raw/ \
  | sed "s/drivers\/platform\/x86\/chromeos_laptop.c/drivers\/platform\/$platform_folder\/chromeos_laptop.c/g" \
  | sudo patch -p1
done

# Need this
sudo cp /usr/src/linux-headers-$mykern/Module.symvers .

# Prepare tree
sudo cp /boot/config-$mykern ./.config
sudo make oldconfig
sudo make prepare
sudo make modules_prepare

# Build only the needed directories
sudo make SUBDIRS=drivers/platform/$platform_folder modules
sudo make SUBDIRS=drivers/i2c/busses modules

# Switch to using our new chromeos_laptop.ko module
sudo cp drivers/platform/$platform_folder/chromeos_laptop.ko /lib/modules/$mykern/kernel/drivers/platform/$platform_folder/

# Switch to using our new designware i2c modules
sudo cp drivers/i2c/busses/i2c-designware-*.ko /lib/modules/$mykern/kernel/drivers/i2c/busses/
sudo depmod -a $mykern

echo "Finished building Chromebook modules in $tempbuild. Reboot to use them."