porting ICM20689 to nRF52832

Well, I could use some expertise, but I am not sure there is any here! I am porting the ICM20689 to the MPU, nRF52832. I have had some experience with the MPU9250 and the MPU9150. After downloading the ICM20648_eMD_nucleo_1.0 I read the pertinent information, refman.pdf. As with the MPU9250 the HostSefif.c/h need to be constructed for the four function open, close, read, and write. The refman.pdf asks me to see the ExampleHostSerif.c for instruction, but it does not exist, and the HostSefif.c/h do not contain these four functions, but does give refernece to these function inside a structure. The example.c given from the download does not reference the HostSefif.c but does reference the idd_io_hal.c/h and that file references the HostSerif.c/h. The idd_io_hal.c/h does have two of the functions read and write, but no open and close.
So, do I write the four functions in a MyHostseriff.c/h or do I write the My_idd_io_hal.c/h and reference the Hostseriff.c/h?
Can the ICM20689 be controlled with the ICM20648 how about the ICM20602?