diff --git a/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb b/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
index f65a3d35d5..a223b7e529 100644
--- a/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
+++ b/src/mainboard/clevo/kbl-u/variants/n13xwu/devicetree.cb
@@ -80,7 +80,6 @@ chip soc/intel/skylake
 		device pci 16.3 off	end # Management Engine KT Redirection
 		device pci 16.4 off	end # Management Engine Interface 3
 		device pci 17.0	on	    # SATA
-			register "SataMode" = "SATA_AHCI"
 			register "SataSalpSupport" = "0"
 			# Ports
 			register "SataPortsEnable[0]" = "1"
diff --git a/src/mainboard/kontron/bsl6/devicetree.cb b/src/mainboard/kontron/bsl6/devicetree.cb
index 9b3b8bf10b..6bdfcaf501 100644
--- a/src/mainboard/kontron/bsl6/devicetree.cb
+++ b/src/mainboard/kontron/bsl6/devicetree.cb
@@ -95,7 +95,6 @@ chip soc/intel/skylake
 		device pci 16.3 off end	# Management Engine KT Redirection
 		device pci 16.4 off end	# Management Engine Interface 3
 		device pci 17.0 on	# SATA
-			register "SataMode"		= "SATA_AHCI"
 			register "SataSalpSupport"	= "1"
 			register "SataPortsEnable[0]"	= "1"
 			register "SataPortsEnable[1]"	= "1"
diff --git a/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb b/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
index 422cd8452d..76aec3f0ab 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
+++ b/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
@@ -5,7 +5,6 @@ chip soc/intel/skylake
 	register "SaGv" = "SaGv_Disabled"
 
 	# SATA configuration
-	register "SataMode" = "SATA_AHCI"
 	register "SataSalpSupport" = "1"
 	register "SataPortsEnable" = "{ \
 		[0]	= 1, \