diff --git a/src/mainboard/51nb/x210/devicetree.cb b/src/mainboard/51nb/x210/devicetree.cb
index 5950dec685..ac1b45d4eb 100644
--- a/src/mainboard/51nb/x210/devicetree.cb
+++ b/src/mainboard/51nb/x210/devicetree.cb
@@ -34,7 +34,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "1"
-	register "SataMode" = "0"
 
 	# The X210 has 3 SATA ports: a full SATA port, mSATA, and SATA over M.2
 	register "SataPortsEnable[0]" = "1"
diff --git a/src/mainboard/google/eve/devicetree.cb b/src/mainboard/google/eve/devicetree.cb
index 8ea6539bec..c7310052db 100644
--- a/src/mainboard/google/eve/devicetree.cb
+++ b/src/mainboard/google/eve/devicetree.cb
@@ -37,7 +37,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
index e79f7044fa..ceca5f14ce 100644
--- a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
@@ -66,7 +66,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "1"
 	register "SataPortsEnable[1]" = "1"
 	register "SataPortsDevSlp[1]" = "1"
diff --git a/src/mainboard/google/glados/devicetree.cb b/src/mainboard/google/glados/devicetree.cb
index 65e1014992..a200cfb8bd 100644
--- a/src/mainboard/google/glados/devicetree.cb
+++ b/src/mainboard/google/glados/devicetree.cb
@@ -36,7 +36,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/atlas/devicetree.cb b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
index 62dd1f5099..39b7d9f9e0 100644
--- a/src/mainboard/google/poppy/variants/atlas/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
@@ -44,7 +44,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
index ebbb12f973..4d145e18e7 100644
--- a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
@@ -32,7 +32,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/nami/devicetree.cb b/src/mainboard/google/poppy/variants/nami/devicetree.cb
index 34163efc51..6d7541e4d7 100644
--- a/src/mainboard/google/poppy/variants/nami/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nami/devicetree.cb
@@ -32,7 +32,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
 	register "SsicPortEnable" = "0"
diff --git a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
index 098216d3c5..068a031f1d 100644
--- a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
@@ -32,7 +32,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 0d9c5bd033..e4e01585bd 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -37,7 +37,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/rammus/devicetree.cb b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
index f2dc5b6b3b..ff06d6acfe 100644
--- a/src/mainboard/google/poppy/variants/rammus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
@@ -44,7 +44,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/google/poppy/variants/soraka/devicetree.cb b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
index 745d72ce32..9be000f0d3 100644
--- a/src/mainboard/google/poppy/variants/soraka/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
@@ -32,7 +32,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
diff --git a/src/mainboard/hp/280_g2/devicetree.cb b/src/mainboard/hp/280_g2/devicetree.cb
index 47df4e1026..5dc62aafc8 100644
--- a/src/mainboard/hp/280_g2/devicetree.cb
+++ b/src/mainboard/hp/280_g2/devicetree.cb
@@ -56,7 +56,6 @@ chip soc/intel/skylake
 		device pci 16.3 off end		# ME KT
 		device pci 16.4 off end		# MEI #3
 		device pci 17.0 on		# SATA
-			register "SataMode"		= "SATA_AHCI"
 			register "SataSalpSupport"	= "1"
 			register "SataPortsEnable"	= "{
 				[0] = 1,
diff --git a/src/mainboard/libretrend/lt1000/devicetree.cb b/src/mainboard/libretrend/lt1000/devicetree.cb
index 0cf8abef65..d047f76349 100644
--- a/src/mainboard/libretrend/lt1000/devicetree.cb
+++ b/src/mainboard/libretrend/lt1000/devicetree.cb
@@ -34,7 +34,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "1"
 	register "SataPortsEnable[1]" = "1"
 	register "SataPortsEnable[2]" = "1"
diff --git a/src/mainboard/protectli/vault_kbl/devicetree.cb b/src/mainboard/protectli/vault_kbl/devicetree.cb
index 3ef4250353..a264c6b276 100644
--- a/src/mainboard/protectli/vault_kbl/devicetree.cb
+++ b/src/mainboard/protectli/vault_kbl/devicetree.cb
@@ -29,7 +29,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
 	register "SsicPortEnable" = "0"
diff --git a/src/mainboard/purism/librem_skl/devicetree.cb b/src/mainboard/purism/librem_skl/devicetree.cb
index 5efb1e2aed..dfa894b3d4 100644
--- a/src/mainboard/purism/librem_skl/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/devicetree.cb
@@ -42,7 +42,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "1"
 	register "SataPortsEnable[1]" = "0"
 	register "SataPortsEnable[2]" = "1"
diff --git a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
index 42ee0c7971..3d311a3dd4 100644
--- a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
+++ b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
@@ -23,7 +23,6 @@ chip soc/intel/skylake
 
 	# FSP Configuration
 	register "SataSalpSupport" = "0"
-	register "SataMode" = "0"
 	register "SataPortsEnable[0]" = "0"
 	register "SataPortsEnable[1]" = "0"
 	register "SataPortsEnable[2]" = "0"