diff --git a/boards/ikea-tradfri/Makefile b/boards/ikea-tradfri/Makefile
index 6529affda2..f8fcbb53a0 100644
--- a/boards/ikea-tradfri/Makefile
+++ b/boards/ikea-tradfri/Makefile
@@ -1,4 +1,3 @@
-# tell the Makefile.base which module to build
 MODULE = board
 
 include $(RIOTBASE)/Makefile.base
diff --git a/boards/ikea-tradfri/Makefile.dep b/boards/ikea-tradfri/Makefile.dep
index befc5ae6d8..eba4fe3046 100644
--- a/boards/ikea-tradfri/Makefile.dep
+++ b/boards/ikea-tradfri/Makefile.dep
@@ -2,4 +2,4 @@ ifneq (,$(filter saul_default,$(USEMODULE)))
     USEMODULE += saul_gpio
 endif
 
-include $(RIOTCPU)/efr32mg1p/Makefile.dep
+include $(RIOTCPU)/efm32/Makefile.dep
diff --git a/boards/ikea-tradfri/Makefile.features b/boards/ikea-tradfri/Makefile.features
index 27786d9c41..904f1df7b9 100644
--- a/boards/ikea-tradfri/Makefile.features
+++ b/boards/ikea-tradfri/Makefile.features
@@ -9,4 +9,4 @@ FEATURES_PROVIDED += periph_uart
 # The board MPU family (used for grouping by the CI system)
 FEATURES_MCU_GROUP = cortex_m4_2
 
-include $(RIOTCPU)/efr32mg1p/Makefile.features
+include $(RIOTCPU)/efm32/Makefile.features
diff --git a/boards/ikea-tradfri/Makefile.include b/boards/ikea-tradfri/Makefile.include
index 74719a0612..b9d65b25c8 100644
--- a/boards/ikea-tradfri/Makefile.include
+++ b/boards/ikea-tradfri/Makefile.include
@@ -1,5 +1,5 @@
 # define the cpu used by ikea-tradfri
-export CPU = efr32mg1p
+export CPU = efm32
 export CPU_MODEL = efr32mg1p132f256gm32
 
 # set default port depending on operating system
diff --git a/boards/sltb001a/Makefile b/boards/sltb001a/Makefile
index 6529affda2..f8fcbb53a0 100644
--- a/boards/sltb001a/Makefile
+++ b/boards/sltb001a/Makefile
@@ -1,4 +1,3 @@
-# tell the Makefile.base which module to build
 MODULE = board
 
 include $(RIOTBASE)/Makefile.base
diff --git a/boards/sltb001a/Makefile.dep b/boards/sltb001a/Makefile.dep
index 351a0725e8..1451bdeab5 100644
--- a/boards/sltb001a/Makefile.dep
+++ b/boards/sltb001a/Makefile.dep
@@ -7,4 +7,4 @@ endif
 # i2c is required for environmental sensors
 USEMODULE += periph_i2c
 
-include $(RIOTCPU)/efr32mg1p/Makefile.dep
+include $(RIOTCPU)/efm32/Makefile.dep
diff --git a/boards/sltb001a/Makefile.features b/boards/sltb001a/Makefile.features
index 7fb29867ee..6b5068bb24 100644
--- a/boards/sltb001a/Makefile.features
+++ b/boards/sltb001a/Makefile.features
@@ -11,4 +11,4 @@ FEATURES_PROVIDED += periph_uart
 # The board MPU family (used for grouping by the CI system)
 FEATURES_MCU_GROUP = cortex_m4_2
 
-include $(RIOTCPU)/efr32mg1p/Makefile.features
+include $(RIOTCPU)/efm32/Makefile.features
diff --git a/boards/sltb001a/Makefile.include b/boards/sltb001a/Makefile.include
index 2b891d80f9..b7ba1de1b5 100644
--- a/boards/sltb001a/Makefile.include
+++ b/boards/sltb001a/Makefile.include
@@ -1,5 +1,5 @@
 # define the cpu used by SLTB001A
-export CPU = efr32mg1p
+export CPU = efm32
 export CPU_MODEL = efr32mg1p132f256gm48
 
 # set default port depending on operating system