OK, answering my own question. I referred to https://michaelfranzl.com/2016/11/10/setting-i2c-speed-raspberry-pi/ I ran this fdtdump to get the device tree fdtdump /boot/sun50i-h5-nanopi-neo2.dtb found "i2c@01c2ac00", although I didn't find clock-frequency parameter under it, I still tried...

Hi,

I'm adding an I2C sensor to my Nano Pi that driving LED screen. However, my logic analyzer shows the I2C is operating at 100Khz,

Are there ways to set the I2C speed to 400Khz?

Thanks