diff --git a/src/mainboard/libretrend/lt1000/devicetree.cb b/src/mainboard/libretrend/lt1000/devicetree.cb
index 2cb674f..dd2fc60 100644
--- a/src/mainboard/libretrend/lt1000/devicetree.cb
+++ b/src/mainboard/libretrend/lt1000/devicetree.cb
@@ -38,11 +38,6 @@
 		[1] = 1,
 		[2] = 1,
 	}"
-	register "SataPortsDevSlp" = "{
-		[0] = 0,
-		[1] = 0,
-		[2] = 0,
-	}"
 	register "SataSpeedLimit" = "2"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "0"
diff --git a/src/mainboard/protectli/vault_kbl/devicetree.cb b/src/mainboard/protectli/vault_kbl/devicetree.cb
index b824fb4..f57f978 100644
--- a/src/mainboard/protectli/vault_kbl/devicetree.cb
+++ b/src/mainboard/protectli/vault_kbl/devicetree.cb
@@ -109,8 +109,6 @@
 	# Enable SATA ports 1,2
 	register "SataPortsEnable[0]" = "1"
 	register "SataPortsEnable[1]" = "1"
-	register "SataPortsDevSlp[0]" = "0"
-	register "SataPortsDevSlp[1]" = "0"
 
 	# Enable Root ports. 1-6 for LAN and Root Port 9
 	register "PcieRpEnable[0]" = "1"
diff --git a/src/mainboard/purism/librem_skl/devicetree.cb b/src/mainboard/purism/librem_skl/devicetree.cb
index 0083e64..03d48fa 100644
--- a/src/mainboard/purism/librem_skl/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/devicetree.cb
@@ -43,8 +43,6 @@
 	# FSP Configuration
 	register "SataPortsEnable[0]" = "1"
 	register "SataPortsEnable[2]" = "1"
-	register "SataPortsDevSlp[0]" = "0"
-	register "SataPortsDevSlp[2]" = "0"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
 	register "SkipExtGfxScan" = "1"