Kernel¶

You can change kernel files after a successful build of Yocto image (bitbake core-image-minimal), see 01. Yocto

To build new kernel there are 2 options

Option 1 build from inside Yocto (this method is used at Alex PC)¶

First locate and change source code:
(locate source code example : poky/build-rockchip/tmp/ work-shared /rockchip-rk3566-evb/kernel-source)

• copy device tree files to /arch/arm64/boot/dts
• copy drivers to drivers folder
• copy include to include folder
• copy Logos

then execute to force compile:

cd /poky 
. oe-init-build-env build-rockchip/
bitbake -c compile virtual/kernel -f

Kernel is located at: poky/build-rockchip/tmp/ work /rockchip_rk3566_evb-poky-linux/linux-rockchip/linux-rockchip_rk3566_evb-standard-build/boot.img

Option 2 create SDK from Yocto (read Yocto documentation)¶

Install SDK

execute:

devtool modify linux-rockchip

change kernel code (device tree, drivers) and build:

devtool build linux-rockchip