How do you change I2C frequency from fast mode(400khz) to standard mode (100Khz) for I2C0 (i2c-0)?

AustinL

I am using Ubuntu 18 with the latest kernel installed and the latest BIOS

Kernel:
Linux easyrassor 4.15.0-37-generic #40~upboard04-Ubuntu SMP Thu Feb 14 13:49:37 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

BIOS:
UCR1BM18

I am using I2C0 pins 73&75. I have probed this with an oscilloscope and the frequency is clearly 333Khz. I believe that the I2C bus is in Fast mode. I need it to be in Standard mode.
My device works perfectly fine on a Raspberry pi @ 100Khz.
There is no option in BIOS to change the speed.

Please help!!