apt-get -y install git-core bc build-essential
cd ~
git clone --depth=1 -b rpi-4.4.y https://github.com/raspberrypi/linux rpi-kernel
cd rpi-kernel
Notice the branch flag (-b rpi-4.4.y)
Choose one way to build: (I really advice to cross-compile, ie: from a Debian 8 amd64 virtual machine)
- For Raspberry Pi 1: (or compute module)
KERNEL=kernel
make bcmrpi_defconfig
! At this precise step, please refer to 'Configure the Kernel' section !
make zImage modules dtbs
- For Raspberry Pi 2:
KERNEL=kernel7
make bcm2709_defconfig
! At this precise step, please refer to 'Configure the Kernel' section !
make -j4 zImage modules dtbs
- Common for both:
make modules_install
cp arch/arm/boot/dts/*.dtb /boot/
cp arch/arm/boot/dts/overlays/*.dtb* /boot/overlays/
cp arch/arm/boot/dts/overlays/README /boot/overlays/
scripts/mkknlimg arch/arm/boot/zImage /boot/$KERNEL.img
cd ~
git clone https://github.com/raspberrypi/tools
cd rpi-kernel
Note for 32bits build environment: remove the -x64 from CROSS_COMPILE path
- For Raspberry Pi 1: (or compute module)
KERNEL=kernel
make ARCH=arm CROSS_COMPILE=~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- bcmrpi_defconfig
- For Raspberry Pi 2:
KERNEL=kernel7
make ARCH=arm CROSS_COMPILE=~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- bcm2709_defconfig
- For both:
! At this precise step, please refer to 'Configure the Kernel' section !
make -j4 ARCH=arm CROSS_COMPILE=~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- zImage modules dtbs
Change the -j4 accordingly (number of threads, typically the number of CPU you want to use to build)
Connect the sdcard to the machine you're building with, and find the two partitions with the command lsblk
Typically sdb1 which is the /boot partition (fat32) and sdb2 which is the root / (ext4)
Then:
mkdir /mnt/fat32
mkdir /mnt/ext4
mount /dev/sdb1 /mnt/fat32
mount /dev/sdb2 /mnt/ext4
cd ~/rpi-kernel
make ARCH=arm CROSS_COMPILE=~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- INSTALL_MOD_PATH=/mnt/ext4 modules_install
cp /mnt/fat32/$KERNEL.img /mnt/fat32/$KERNEL-backup.img
scripts/mkknlimg arch/arm/boot/zImage /mnt/fat32/$KERNEL.img
cp arch/arm/boot/dts/*.dtb /mnt/fat32/
cp arch/arm/boot/dts/overlays/*.dtb* /mnt/fat32/overlays/
cp arch/arm/boot/dts/overlays/README /mnt/fat32/overlays/
umount /mnt/fat32
umount /mnt/ext4
Simply replace the .config with the one I'm providing here, and you're done.
! Caution: You have to execute this step right before the make [...] zImage modules dtbs command !
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