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DevTerm/Code/patch/cm3/README.md
cuu 95e50bedce Update cm3 kernel patch for latest rpi kernel rpi-4.19.y 
Add cm3 kernel compiling tips
2024-06-03 00:30:18 -07:00

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How to compile devterm cm3 kernel

Clone kernel source code

git clone https://github.com/raspberrypi/linux.git  
cd linux
git checkout remotes/origin/rpi-4.19.y

Get cross compile tools

git clone https://github.com/raspberrypi/tools.git

Compiling process

#must use the rpi arm-bcm2708 cross compiler tools

cd linux
git apply devterm-4.19_v0.11.patch #get patch from https://github.com/clockworkpi/DevTerm/tree/main/Code/patch/cm3

export PATH=/data/github/raspberrypi/tools/arm-bcm2708/arm-linux-gnueabihf/bin/:$PATH ## change the arm-bcm2708 tools location for yourself

KERNEL=kernel7l make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig
KERNEL=kernel7l make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j3
INSTALL_MOD_PATH=./modules 
rm -rf $INSTALL_MOD_PATH
make modules_install

rm modules/lib/modules/*/build
rm modules/lib/modules/*/source

/boot/config.txt

In config.txt,I renamed kernel7.img to devterm-kernel7.img

ignore_lcd=1
dtoverlay=vc4-kms-v3d,audio=0,cma-384
dtoverlay=devterm-pmu
dtoverlay=devterm-panel
dtoverlay=devterm-wifi
dtoverlay=devterm-bt
dtoverlay=devterm-misc
gpio=5=op,dh
gpio=9=op,dh
gpio=10=ip,np
gpio=11=op,dh

enable_uart=1
dtparam=spi=on
dtoverlay=spi-gpio35-39

dtparam=audio=on
kernel=devterm-kernel7.img