Melfas MIP4 Touch Screen Driver for Braswell/Whiskey Lake/newer chromebooks.
Tested on Acer C731T-C42N (reks). Works with up to 10 touches.
Huge thanks to the vmulti and DragonFlyBSD projects, which I used for references. Also, thanks to Microsoft for open sourcing the Synaptics RMI I2C driver, which I also used as a reference.