RZ-G/RZ-G2 BSP Porting OpenWRT

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Specification

Target OpenWRT OS Version: openwrt-22.03

Target reference board: RZ/G2L,/G2LC,/G2UL SMARC

Host PC Environment: Ubuntu20.04

OpenWRT build system setup bese on Ubuntu20.04

Run below command on Host Ubuntu PC

sudo apt update

sudo apt install build-essential ccache ecj fastjarfileg++gawk\

gettextgitjava-propose-classpath libelf-dev libncurses5-dev\

libncursesw5-dev libssl-dev python python2.7-dev python3unzipwget\

python-distutils-extra python3-setuptools python3-dev rsync subversion\

swigtimexsltproc zlib1g-dev

Download source code

git clone https://git.openwrt.org/openwrt/openwrt.git

The reasion why we need to choise 22.03 branch is because openwrt-22.03 use the same kernel version linux-5.10 with RZ/G2L VLP3.0.x yocto sdk, so we can reduce the hard difficulty when portting renesas's smarc board driver to the kernel.

openwrt22.03 base on kernel version 5.10.116

openwrt21.02 base on kernel version 5.4.194

openwrt19.07 base on kernel version 4.14.275

openwrt18.06 base on kernel version 4.14.206

Check out branch code

cd openwrt git branch -a master remotes/origin/HEAD -> origin/master remotes/origin/lede-17.01 remotes/origin/master remotes/origin/openwrt-18.06 remotes/origin/openwrt-19.07 remotes/origin/openwrt-21.02 remotes/origin/openwrt-22.03 git checkout openwrt-22.03 Branch 'openwrt-22.03' set up to track remote branch 'openwrt-22.03' from 'origin'. Switched to a new branch 'openwrt-22.03' git branch -a master openwrt-22.03 remotes/origin/HEAD -> origin/master remotes/origin/lede-17.01 remotes/origin/master remotes/origin/openwrt-18.06 remotes/origin/openwrt-19.07 remotes/origin/openwrt-21.02 remotes/origin/openwrt-22.03

Get current branch's application source code

cd openwrt
./scripts/feeds update -a  && ./scripts/feeds install -a

Get current branch's application source code

cd openwrt

./scripts/feeds update -a && ./scripts/feeds install -a

Prepare kernel source code

Because openwrt22.03 default use kernel version 5.10.xxx come from kernel.org, but this version source code download form kernel.org don't support RZ/G2L SMRAC EVK board build. So, we need to use external kernel code come from Renesas's GitHub.

git clone https://github.com/renesas-rz/rz_linux-cip
cd rz_linux_cip
git checkout rz-5.10-cip3

Select project to be build by menuconfig

cd openwrt

make defconfig && make menuconfig

Select red box information

Target System () ---> Renesas

Subtarget ( ) ---> RZ/G2X MPU soc evk boards

Target Profile (smarc rzg2l) ---> smarc rzg2l