Q:

Are there any software drivers for the peripherals in the EFM32?

A:

Yes, the energyAware EFM32 CMSIS Software package includes an API (EFM32LIB) for the peripherals in the EFM32.

You can find Doxygen documentation for this API here (EFM32_Library is found under Modules):

http://downloads.energymicro.com/documentation/doxygen/

Both the Doxygen documentation and CMSIS library is also available through Simplicity Studio.