This kernel tree is meant for:
Features in addition to mainline:
Pre-built u-boot and kernels are available at https://xff.cz/kernels/
You may need some firmware files for some part of the functionality. Those are available at: https://megous.com/git/linux-firmware
You may want to configure CONFIG_EXTRA_FIRMWARE and CONFIG_EXTRA_FIRMWARE_DIR to your liking. Default is to build the firmware files into the kernel.
You can use this kernel to run a desktop environment on Orange Pi SBCs, Arch Linux on your Pinephone, or to have a completely opensource OS on a Pocketbook e-ink book reader.
Have fun!
These are rudimentary instructions and you need to understand what you're doing. These are just core steps required to build the ATF/u-boot/kernel. Downloading, verifying, renaming to correct directories is not described or mentioned. You should be able to infer missing necessary steps yourself for your particular needs.
Get necessary toolchains from:
Extract toolchains and prepare the environment:
CWD=`pwd` OUT=$CWD/builds SRC=$CWD/u-boot export PATH="$PATH:$CWD/Toolchains/arm/bin:$CWD/Toolchains/aarch64/bin"
For Orange Pi PC2, Orange Pi 3 or PinePhone:
export CROSS_COMPILE=aarch64-linux-gnu- export KBUILD_OUTPUT=$OUT/.tmp/uboot-pc2 rm -rf "$KBUILD_OUTPUT" mkdir -p $KBUILD_OUTPUT $OUT/pc2
Get and build ATF from https://github.com/ARM-software/arm-trusted-firmware:
make -C "$CWD/arm-trusted-firmware" PLAT=sun50i_a64 DEBUG=1 bl31 cp "$CWD/arm-trusted-firmware/build/sun50i_a64/debug/bl31.bin" "$KBUILD_OUTPUT"
Use sun50i_a64 for Orange Pi PC2 or PinePhone and sun50i_h6 for Orange Pi 3.
Build u-boot from https://megous.com/git/u-boot/ (opi-v2020.04 branch) with appropriate defconfig (orangepi_one_defconfig, orangepi_pc2_defconfig, orangepi_pc_defconfig, orangepi_3_defconfig, tbs_a711_defconfig, pinephone_defconfig).
My u-boot branch already has all the necessary patches integrated and is configured for quick u-boot/kernel startup.
make -C u-boot orangepi_pc2_defconfig
make -C u-boot -j5
cp $KBUILD_OUTPUT/.config $OUT/pc2/uboot.config
cat $KBUILD_OUTPUT/{spl/sunxi-spl.bin,u-boot.itb} > $OUT/pc2/uboot.bin
Get kernel from this repository and checkout the latest orange-pi-5.8 branch.
Build the kernel for 64-bit boards:
export ARCH=arm64 export CROSS_COMPILE=aarch64-linux-gnu- export KBUILD_OUTPUT=$OUT/.tmp/linux-arm64 mkdir -p $KBUILD_OUTPUT $OUT/pc2 make -C linux orangepi_defconfig # or make -C linux pocketbook_touch_lux_3_defconfig # or make -C linux tbs_a711_defconfig make -C linux -j5 clean make -C linux -j5 Image dtbs cp -f $KBUILD_OUTPUT/arch/arm64/boot/Image $OUT/pc2/ cp -f $KBUILD_OUTPUT/.config $OUT/pc2/linux.config cp -f $KBUILD_OUTPUT/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-pc2.dtb $OUT/pc2/board.dtb
Build the kernel for 32-bit boards:
export ARCH=arm export CROSS_COMPILE=arm-linux-gnueabihf- export KBUILD_OUTPUT=$OUT/.tmp/linux-arm mkdir -p $KBUILD_OUTPUT $OUT/pc make orangepi_defconfig # or make pinephone_defconfig make -C linux orangepi_defconfig make -C linux -j5 clean make -C linux -j5 zImage dtbs cp -f $KBUILD_OUTPUT/arch/arm/boot/zImage $OUT/pc/ cp -f $KBUILD_OUTPUT/.config $OUT/pc/linux.config cp -f $KBUILD_OUTPUT/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dtb $OUT/pc/board.dtb # Or use sun8i-h3-orangepi-one.dtb for Orange Pi One
I don‘t run u-boot on PinePhone, so my pre-built kernel packages don’t come with u-boot built for PinePhone.
If you‘re getting lockups on boot or later during thermal regulation, you’re missing an u-boot patch.
This patch is necessary to run this kernel!
These lockups are caused by improper NKMP clock factors selection in u-boot for PLL_CPUX. (M divider should not be used. P divider should be used only for frequencies below 240MHz.)
This patch for u-boot fixes it:
0001-sunxi-h3-Fix-PLL1-setup-to-never-use-dividers.patch
Kernel side is already fixed in this kernel tree.