diff --git a/src/mainboard/51nb/x210/devicetree.cb b/src/mainboard/51nb/x210/devicetree.cb
index b25e357..83f8e6e 100644
--- a/src/mainboard/51nb/x210/devicetree.cb
+++ b/src/mainboard/51nb/x210/devicetree.cb
@@ -44,7 +44,6 @@
 	register "SataPortsDevSlp[2]" = "1"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb b/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
index cb6d409..f0588da 100644
--- a/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
+++ b/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
@@ -41,7 +41,6 @@
 		device ref igpu 	on	end
 		device ref sa_thermal	on	end
 		device ref south_xhci	on
-			register "SsicPortEnable" = "0"
 			# USB2
 			register "usb2_ports[0]" = "USB2_PORT_MID(OC_SKIP)"	# Type-A, right
 			register "usb2_ports[1]" = "USB2_PORT_FLEX(OC_SKIP)"	# 3G / LTE
diff --git a/src/mainboard/facebook/monolith/devicetree.cb b/src/mainboard/facebook/monolith/devicetree.cb
index fdb59c9..bf634c5 100644
--- a/src/mainboard/facebook/monolith/devicetree.cb
+++ b/src/mainboard/facebook/monolith/devicetree.cb
@@ -197,8 +197,6 @@
 		[3] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB-C Port 1 */
 	}"
 
-	register "SsicPortEnable" = "0"
-
 	# Must leave UART0 enabled or SD/eMMC will not work as PCI
 	register "SerialIoDevMode" = "{
 		[PchSerialIoIndexI2C0]  = PchSerialIoDisabled,
diff --git a/src/mainboard/google/eve/devicetree.cb b/src/mainboard/google/eve/devicetree.cb
index 8b4718d..62a5ac2 100644
--- a/src/mainboard/google/eve/devicetree.cb
+++ b/src/mainboard/google/eve/devicetree.cb
@@ -40,7 +40,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
index ec11060..c6ec085 100644
--- a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
@@ -71,7 +71,6 @@
 	register "SataPortsDevSlp[1]" = "1"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/glados/devicetree.cb b/src/mainboard/google/glados/devicetree.cb
index 2c34beb..789d49a 100644
--- a/src/mainboard/google/glados/devicetree.cb
+++ b/src/mainboard/google/glados/devicetree.cb
@@ -39,7 +39,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/atlas/devicetree.cb b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
index e522041..e661f3a 100644
--- a/src/mainboard/google/poppy/variants/atlas/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
@@ -47,7 +47,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
index cfeefb1..5f8b459 100644
--- a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
@@ -35,7 +35,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/nami/devicetree.cb b/src/mainboard/google/poppy/variants/nami/devicetree.cb
index e5cbdcc..ea753bf 100644
--- a/src/mainboard/google/poppy/variants/nami/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nami/devicetree.cb
@@ -43,7 +43,6 @@
 	register "SataSalpSupport" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
index ad22c77..aebec9f 100644
--- a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
@@ -44,7 +44,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 7c0abc1..a5db866 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -40,7 +40,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/rammus/devicetree.cb b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
index dce0a89..786354e 100644
--- a/src/mainboard/google/poppy/variants/rammus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
@@ -47,7 +47,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/google/poppy/variants/soraka/devicetree.cb b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
index feaa775..d274e15 100644
--- a/src/mainboard/google/poppy/variants/soraka/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
@@ -44,7 +44,6 @@
 	register "SataPortsEnable[0]" = "0"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "3"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/libretrend/lt1000/devicetree.cb b/src/mainboard/libretrend/lt1000/devicetree.cb
index 9d7dedf..9c4a366 100644
--- a/src/mainboard/libretrend/lt1000/devicetree.cb
+++ b/src/mainboard/libretrend/lt1000/devicetree.cb
@@ -47,7 +47,6 @@
 	register "SataSpeedLimit" = "2"
 	register "DspEnable" = "1"
 	register "IoBufferOwnership" = "0"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/protectli/vault_kbl/devicetree.cb b/src/mainboard/protectli/vault_kbl/devicetree.cb
index c5a2c56..503a491 100644
--- a/src/mainboard/protectli/vault_kbl/devicetree.cb
+++ b/src/mainboard/protectli/vault_kbl/devicetree.cb
@@ -31,7 +31,6 @@
 	register "SataSalpSupport" = "0"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/purism/librem_skl/devicetree.cb b/src/mainboard/purism/librem_skl/devicetree.cb
index f844a52..acff282 100644
--- a/src/mainboard/purism/librem_skl/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/devicetree.cb
@@ -49,7 +49,6 @@
 	register "SataPortsDevSlp[2]" = "0"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"
diff --git a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
index e8da7af..e405114 100644
--- a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
+++ b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
@@ -30,7 +30,6 @@
 	}"
 	register "DspEnable" = "0"
 	register "IoBufferOwnership" = "0"
-	register "SsicPortEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "SkipExtGfxScan" = "1"
 	register "SaGv" = "SaGv_Enabled"