UP Board UBUNTU 18.04 - I2C speed select

lz1msz New Member Posts: 1

We use UP board with standard UBUNTU 18.04 installation and then custom kernel update, according to the instruction:

We use I2C0 (PIN 27 and 28) to communicate with ATECC508A. It requires 100KHz operation and not possible to use with 400KHz (actually possible up to 1M, but the Wake-up procedure will not work using the i2c driver). We need to setup the I2C speed to 100KHz. We did that trough the BIOS and the speed remained 400KHz. Do you know any way to run the I2C with 100KHz?