IAR
Update startup and system file from M4 platform files to M0p platform files. The files are available in folder: FRDM-K32L36\devices\K32L3A60. The bellow picture shows how to change m4 project files to M0p project file.

Open M4 project in IAR. Right click, in option–>General Options–>target and update the CPU type form M4 to M0p.

Again, in M4 project in IAR, in option–>linker–>config, change the linker configure file form M4 link file to M0p link file. The linker file path is devices\ K32L3A60 folder.

In M4 project in IAR, in option–>c/c++ compiler–>Preprocessor, change the CPU MACRO from “CPU_K32W042S1M2VPJ_cm4” to “CPU_K32W042S1M2VPJ_cm0plus”.

Add int-mux file to M0p project, driver > add > add files, as shown in the figure below

Add FRDM-K32L3A6 \devices\ K32L3A60 \drivers\fsl_intmux.c and fsl_intmux.h files to project.

In M4 project in IAR, in option C/C++ compiler > Preprocessor. The file path “$PROJ_DIR$/../../../../../../devices/ K32L3A60 /drivers” must be in M0p project setting.
For freertos example, update the freertos related portable file and include path from M4 to M0.

Update the include path:

After the above project configuration is complete, the m4 USB example project would be changed to M0p project. M0p example USB project can now be downloaded and debugged.