diff --git a/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
index 76d437c..4ffc41d 100644
--- a/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
+++ b/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
@@ -68,6 +68,9 @@
 	register "PchHdaIDispLinkFrequency" = "HDA_LINKFREQ_96MHZ"
 	register "PchHdaIDispCodecEnable" = "1"
 
+        # FIVR RFI Spread Spectrum 1.5%
+        register "FivrSpreadSpectrum" = "FIVR_SS_1_5"
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |
diff --git a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
index 154f697..c89f24f 100644
--- a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
+++ b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
@@ -74,6 +74,9 @@
 	register "PchHdaIDispLinkFrequency" = "HDA_LINKFREQ_96MHZ"
 	register "PchHdaIDispCodecEnable" = "1"
 
+	# FIVR RFI Spread Spectrum 1.5%
+	register "FivrSpreadSpectrum" = "FIVR_SS_1_5"
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |
diff --git a/src/mainboard/google/brya/variants/redrix/overridetree.cb b/src/mainboard/google/brya/variants/redrix/overridetree.cb
index 0ed6c52..ce9ba37 100644
--- a/src/mainboard/google/brya/variants/redrix/overridetree.cb
+++ b/src/mainboard/google/brya/variants/redrix/overridetree.cb
@@ -34,6 +34,8 @@
 	register "SaGv" = "SaGv_Enabled"
 
 	register "CnviBtAudioOffload" = "true"
+	# FIVR RFI Spread Spectrum 6%
+	register "FivrSpreadSpectrum" = "FIVR_SS_6"
 
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+