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- # Create a temp directory for our work
- tempbuild=`mktemp -d`
- cd $tempbuild
- # Determine kernel version (with and without Ubuntu-specific suffix)
- mykern=${1:-$(uname -r)}
- mykernver=linux-$(echo $mykern | cut -d'-' -f 1)
- # Install necessary deps to build a kernel
- sudo apt-get build-dep -y --no-install-recommends linux-image-$mykern
- # Grab Ubuntu kernel source
- wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.14.5.tar.xz
- tar -xJf linux-3.14.5.tar.xz
- cd linux-3.14.5
- 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 post-Pixel Chromebook 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" \
- | patch -p1
- done
- # Need this
- cp /usr/src/linux-headers-$mykern/Module.symvers .
- # Prep tree
- cp /boot/config-$mykern ./.config
- make oldconfig
- make prepare
- make modules_prepare
- # Build only the needed directories
- make SUBDIRS=drivers/platform/$platform_folder modules
- make SUBDIRS=drivers/i2c/busses modules
- # switch to using our new chromeos_laptop.ko module
- # preserve old as .orig
- sudo mv /lib/modules/$mykern/kernel/drivers/platform/$platform_folder/chromeos_laptop.ko /lib/modules/$mykern/kernel/drivers/platform/$platform_folder/chromeos_laptop.ko.orig
- sudo cp drivers/platform/$platform_folder/chromeos_laptop.ko /lib/modules/$mykern/kernel/drivers/platform/$platform_folder/
- # switch to using our new designware i2c modules
- # preserve old as .orig
- sudo mv /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-core.ko /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-core.ko.orig
- sudo mv /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-pci.ko /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-pci.ko.orig
- sudo mv /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-platform.ko /lib/modules/$mykern/kernel/drivers/i2c/busses/i2c-designware-platform.ko.orig
- 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."
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