Here is a list of all modules:
BSPBoard Support Package
API for DKs
API for STKs and WSTKs
Common BSP for all kits
Device InitializationDevice Initialization using HAL configuration
Thunderboard Sense BSPBSP for Thunderboard Sense and Thunderboard Sense 2
BAP - Barometric Pressure SensorDriver for the Bosch Sensortec BMP280 pressure sensor
BOARD Module for Thunderboard SenseBoard hardware control, configuraton and miscellaneous functions
Power and Interrupt Controller DefinitionsThunderboard Sense 1 Power and Interrupt Controller register and bitfield definitions
BOARD Module for Thunderboard Sense 2Board hardware control, configuraton and miscellaneous functions
CCS811 - Indoor Air Quality SensorDriver for the Cambridge CMOS Sensors CCS811 gas and indoor air quality sensor
HALL - Hall Effect SensorDriver for Hall effect sensor
Si7210 - Hall Effect SensorDriver for the Silicon Labs Si7210 Hall effect sensor
ICM20648 - 6-axis Motion Sensor DriverDriver for the Invensense ICM20648 6-axis motion sensor
IMU - Inertial Measurement UnitInertial Measurement Unit driver
MIC - Microphone Driver (ADC)Driver for the Knowles SPV1840LR5H-B MEMS Microphone
MIC - Microphone Driver (I2S)Driver for the Invensense ICS-43434 MEMS Microphone
SI1133 - Ambient Light and UV Index SensorDriver for the Silicon Labs Si1133 Ambient Light and UV sensor
SI7021 - Relative Humidity and Temperature SensorDriver for the Silicon Labs Si7021 I2C Humidity and Temperature Sensor
Utility FunctionsUtility functions
DevicesSilicon Laboratories CMSIS-CORE device system headers
EMDRVGecko Platform driver library
DMADRVDMADRV Direct Memory Access Driver
EZRADIODRVEZR32 EzRadio Peripheral Interface Driver
API_LayerEzRadio API Layer

COMM_LayerEzRadio Communication Layer

HAL_LayerEzRadio HAL Layer

Plugin_SystemEzRadio Plugin System Layer, see Plugin System Layer for detailed documentation.

Auto_ACK_PluginAuto acknowledge plugin, see Plugin System Layer for detailed documentation.

CRC_Error_PluginCRC error plugin, see Plugin System Layer for detailed documentation.

Direct_Receive_PluginDirect receive plugin, see Plugin System Layer for detailed documentation.

Direct_Transmit_PluginDirect transmit plugin, see Plugin System Layer for detailed documentation.

PN9_PluginPseudo random transmit plugin, see Plugin System Layer for detailed documentation.

Plugin_ManagerPlugin manager, see Plugin System Layer for detailed documentation.

Receive_PluginReceive plugin, see Plugin System Layer for detailed documentation.

Transmit_PluginTransmit plugin, see Plugin System Layer for detailed documentation.

Unmod_Carrier_PluginUnmodulated Carrier plugin, see Plugin System Layer for detailed documentation.

GPIOINTGPIOINT General Purpose Input/Output Interrupt dispatcher
NVMNVM Non-volatile Memory Wear-Leveling Driver
NVM3NVM3 Non-Volatile Memory Management driver
NVM3HalNVM3 HAL module
NVM3LockNVM3 lock module
RTCDRVReal-time Clock Driver
SLEEPSleep Management Driver
SPIDRVSPIDRV Serial Peripheral Interface Driver
TEMPDRVTEMPDRV Temperature Sensor Driver
UARTDRVUARTDRV Universal Asynchronous Receiver/Transmitter Driver
USTIMERUSTIMER Microsecond Delay Timer Driver
EMLIBLow-level peripheral library
ACMPAnalog comparator (ACMP) Peripheral API
ADCAnalog to Digital Converter (ADC) Peripheral API
ASSERTError checking module
BUSBUS register and RAM bit/field read/write API
CHIPChip errata workarounds initialization API
CMUClock management unit (CMU) Peripheral API
COMMONGeneral purpose utilities and cross-compiler support
CORECore interrupt handling API
CRYOTIMERUltra Low Energy Timer/Counter (CRYOTIMER) Peripheral API
CRYPTOCryptography accelerator peripheral API
CSENCapacitive Sense (CSEN) Peripheral API
DBGDebug (DBG) Peripheral API
EMUEnergy Management Unit (EMU) Peripheral API
GPCRCGeneral Purpose Cyclic Redundancy Check (GPCRC) API
GPIOGeneral Purpose Input/Output (GPIO) API
I2CInter-integrated Circuit (I2C) Peripheral API
IDACCurrent Digital-to-Analog Converter (IDAC) Peripheral API
INTSafe nesting of interrupt disable/enable API
LDMALinked Direct Memory Access (LDMA) Peripheral API
LESENSELow Energy Sensor (LESENSE) Peripheral API
LETIMERLow Energy Timer (LETIMER) Peripheral API
LEUARTLow Energy Universal Asynchronous Receiver/Transmitter (LEUART) Peripheral API
MPUMemory Protection Unit (MPU) Peripheral API
MSCMemory System Controller API
OPAMPOperational Amplifier (OPAMP) peripheral API
PCNTPulse Counter (PCNT) Peripheral API
PRSPeripheral Reflex System (PRS) Peripheral API
RAMFUNCRAM code support
RMUReset Management Unit (RMU) Peripheral API
RTCCReal Time Counter (RTCC) Peripheral API
SMUSecurity Management Unit (SMU) Peripheral API
TIMERTimer/Counter (TIMER) Peripheral API
USARTUniversal Synchronous/Asynchronous Receiver/Transmitter Peripheral API
VDACDigital to Analog Voltage Converter (VDAC) Peripheral API
WDOGWatchdog (WDOG) Peripheral API
External Device DriversExternal Device Drivers is a collection of device drivers for external components. These components are typically Silicon Laboratories ICs that are not part of the Gecko families of SoCs
EFP DriverEFP (Energy Friendly PMIC) driver
Kit DriversKit support and drivers
CPT112S_I2CSilicon Labs 12-pad Capacitive Touch Evaluation Board I2C driver
CapSenseCapacitive sensing driver
DisplayDisplay device driver stack library
DmaCtrlUDMA control block array
Gecko USB MSDUSB Mass Storage Class (MSC)
Gecko USB RS232 bridgeGecko USB to RS232 bridge (CDC Class)
HidKeyboardImplements a USB HID class keyboard
I2CSPMI2C Simple Polled Master driver
Ksz8851snlKSZ8851SNL SPI Ethernet Controller driver
MicroSdSPI driver for micro SD card
NANDFlashDriver for Numonyx NAND256W3A NAND Flash devices
NORFlashDriver for Spanion S29GL128P90FFIR13 and S29GL064N NOR Flash devices
RetargetIoStandard I/O retargeting driver
SegmentLcdSegment LCD driver
Si114xSilicon Labs Si114x Ultraviolet (UV) Index, Gesture, Proximity, and Ambient Light Sensor I2C driver
Si7013Silicon Labs Si7013 Relative Humidity and Temperature Sensor I2C driver
Si72xxSilicon Labs Si72xx Magnetic Hall Effect Sensor I2C driver
TFTDriver for SSD2119 TFT in Direct Drive or Adress Mapped mode
TempSensorDriver for DS75 I2C temperature sensor
TextdisplayLine based text output terminal interface on top of the DISPLAY device driver stack. See TextDisplay Library for more information
TouchTouch panel driver for DK3650, DK3750 and DK3850 Development Kits
UdelayCalibrated busy wait loop
UsbHidUSB HID keyboard scan codes
VddCheckVDD Voltage Check using EMLIB Voltage Comparator (VCOMP) API
Platform CommonGecko Platform Common components are used throughout the Gecko SDK
Status Codes
Platform MiddlewareGecko Platform Middleware for use with EFM32, EZR32 and EFR32 products
Capacitive Sensing Firmware LibraryCapacitive sensing firmware library for Silicon Labs MCUs
GLIBGraphics Library
Platform ServicesGecko Platform Service components are high-level, device-independent and thread-safe APIs. Each service may have a hardware abstraction layer (HAL)
MPUMPU basic utilities
SLEEPTIMERLow frequency timer utilities. Utilities (timer, delays and time keeping)