openwrt snapshot with new kernel has removed kmod-i2c-gpio-custom module, it’s not needed, but i2c is disabled default

modify dts to enable i2c0

vi ./build_dir/target-aarch64_cortex-a53_musl/linux-sunxi_cortexa53/linux-5.4.85/arch/arm/boot/dts/sunxi-h3-h5.dtsi

set i2c0 status to “okay”

OR,

vi ./build_dir/target-aarch64_cortex-a53_musl/linux-sunxi_cortexa53/linux-5.4.85/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts

and add follow lines

&i2c0 {
        status = "okay";
};

and than, RE compile!

openwrt compile for nanopi neo2 with NanoHatOLED

add src-git NanoHatOLED https://github.com/vinewx/NanoHatOLED.git to feeds.conf.default

./scripts/feeds update NanoHatOLED && ./scripts/feeds install nanohatoled

make menuconfig

select package Extra packages -> nanohatoled

be sure depends are selected:

i2c-tools
kmod-i2c-core
kmod-i2c-gpio
kmod-i2c-smbus (not sure if needed)
python3-pillow
python3-smbus

AND be careful, temperature display maybe not work when press K2

if not work K2, disable temperature display in python file

nanohatoled/files/NanoHatOLED/bakebit_nanohat_oled.py (installed @ /usr/share/NanoHatOLED/bakebit_nanohat_oled.py)

comment and set tempStr to empty

#        tempI = int(open('/sys/class/thermal/thermal_zone0/temp').read());
#        if tempI>1000:
#            tempI = tempI/1000
#        tempStr = u"CPU TEMP: %s\u00b0C" % int(tempI)
        tempStr = ""