EFM32 SPI controller

modulename: spi-efm32.ko

configname: CONFIG_SPI_EFM32

Linux Kernel Configuration
└─>Device Drivers
└─>SPI support
└─>EFM32 SPI controller
In linux kernel since version 3.12 (release Date: 2013-11-03)  
Driver for the spi controller found on Energy Micro's EFM32 SoCs.

source code: