soc/intel/skylake: Enable thermal subsystem depending on devicetree

Currently SA thermal subsystem gets enabled by the option Device4Enable,
but this duplicates the devicetree on/off options. Therefore depend on
the devicetree for enablement of the SA thermal subsystem controller.

All corresponding mainboards were checked if the devicetree
configuration matches the Device4Enable setting, and missing entries
were added.

Change-Id: I7553716d52743c3e8d82891b2de14c52c6d8ef16
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44026
Reviewed-by: Michael Niewöhner
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

23 files changed, 22 insertions, 25 deletions

diff --git a/src/mainboard/51nb/x210/devicetree.cb b/src/mainboard/51nb/x210/devicetree.cb
index d4ab530720..d6ad862c11 100644
--- a/src/mainboard/51nb/x210/devicetree.cb
+++ b/src/mainboard/51nb/x210/devicetree.cb
@@ -54,7 +54,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "1"
 	register "SaGv" = "SaGv_Enabled"
 	register "PmConfigSlpS3MinAssert" = "2"		# 50ms
@@ -123,6 +122,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/facebook/monolith/devicetree.cb b/src/mainboard/facebook/monolith/devicetree.cb
index 862166320e..f6c42f1a94 100644
--- a/src/mainboard/facebook/monolith/devicetree.cb
+++ b/src/mainboard/facebook/monolith/devicetree.cb
@@ -38,7 +38,6 @@ chip soc/intel/skylake
 	# FSP Configuration
 	register "ScsEmmcHs400Enabled" = "1"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "SaGv" = "SaGv_Enabled"
 	register "SaImguEnable" = "0"
 	register "Cio2Enable" = "0"
diff --git a/src/mainboard/google/eve/devicetree.cb b/src/mainboard/google/eve/devicetree.cb
index 5e927b4a36..8a459f71bc 100644
--- a/src/mainboard/google/eve/devicetree.cb
+++ b/src/mainboard/google/eve/devicetree.cb
@@ -47,7 +47,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -247,6 +246,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on
 			chip drivers/usb/acpi
 				register "desc" = ""Root Hub""
diff --git a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
index ac3ee8b77e..651f174a27 100644
--- a/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/fizz/variants/baseboard/devicetree.cb
@@ -78,7 +78,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "2"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -322,6 +321,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on
 			chip drivers/usb/acpi
 				register "desc" = ""Root Hub""
diff --git a/src/mainboard/google/glados/devicetree.cb b/src/mainboard/google/glados/devicetree.cb
index 1e1b8e8722..f2d7c64d0c 100644
--- a/src/mainboard/google/glados/devicetree.cb
+++ b/src/mainboard/google/glados/devicetree.cb
@@ -49,7 +49,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -102,6 +101,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/google/poppy/variants/atlas/devicetree.cb b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
index 432ef99d5c..eae98356cb 100644
--- a/src/mainboard/google/poppy/variants/atlas/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/atlas/devicetree.cb
@@ -54,7 +54,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -248,6 +247,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 13.0 off end # Integrated Sensor Hub
 		device pci 14.0 on
 			chip drivers/usb/acpi
diff --git a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
index 2dc0703566..ea6267f699 100644
--- a/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/baseboard/devicetree.cb
@@ -44,7 +44,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "2"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -268,6 +267,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/google/poppy/variants/nami/devicetree.cb b/src/mainboard/google/poppy/variants/nami/devicetree.cb
index bf3b7bd923..98568f8d8d 100644
--- a/src/mainboard/google/poppy/variants/nami/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nami/devicetree.cb
@@ -43,7 +43,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -283,6 +282,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
index d64bd8a022..43d6509ebb 100644
--- a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
@@ -44,7 +44,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "2"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -289,6 +288,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 26207f529e..2bd82a9cfe 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -49,7 +49,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -268,7 +267,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
-
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on
 			chip drivers/usb/acpi
 				register "desc" = ""Root Hub""
diff --git a/src/mainboard/google/poppy/variants/rammus/devicetree.cb b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
index 54faf473f8..ef5cd1b008 100644
--- a/src/mainboard/google/poppy/variants/rammus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
@@ -54,7 +54,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "2"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -247,6 +246,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on
 			chip drivers/usb/acpi
 				register "desc" = ""Root Hub""
diff --git a/src/mainboard/google/poppy/variants/soraka/devicetree.cb b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
index 777c5214c7..e5307c22cd 100644
--- a/src/mainboard/google/poppy/variants/soraka/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
@@ -44,7 +44,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "2"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -269,6 +268,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/intel/kblrvp/variants/baseboard/devicetree.cb b/src/mainboard/intel/kblrvp/variants/baseboard/devicetree.cb
index 231fbadae4..318986e759 100644
--- a/src/mainboard/intel/kblrvp/variants/baseboard/devicetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/baseboard/devicetree.cb
@@ -28,7 +28,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "1"
 	register "ScsSdCardEnabled" = "2"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "SaGv" = "SaGv_Enabled"
 	register "PchHdaVcType" = "Vc1"
 
@@ -121,6 +120,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb b/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
index ad9dd3622c..ae372ec88d 100644
--- a/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
@@ -4,7 +4,6 @@ chip soc/intel/skylake
 	register "DspEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsSdCardEnabled" = "0"
-	register "Device4Enable" = "0"
 	register "PmTimerDisabled" = "0"
 
 	register "serirq_mode" = "SERIRQ_CONTINUOUS"
@@ -117,6 +116,7 @@ chip soc/intel/skylake
 	}"
 
 	device domain 0 on
+		device pci 04.0 off end # SA thermal subsystem
 		device pci 17.0 on  end # SATA
 		device pci 19.1 on  end # I2C #5
 		device pci 1e.1 on  end # UART #1
diff --git a/src/mainboard/intel/kunimitsu/devicetree.cb b/src/mainboard/intel/kunimitsu/devicetree.cb
index aebda8567c..ae637ca53b 100644
--- a/src/mainboard/intel/kunimitsu/devicetree.cb
+++ b/src/mainboard/intel/kunimitsu/devicetree.cb
@@ -29,7 +29,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "1"
 	register "ScsSdCardEnabled" = "2"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "SaGv_Enabled"
 	register "PmTimerDisabled" = "1"
@@ -175,6 +174,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/intel/saddlebrook/devicetree.cb b/src/mainboard/intel/saddlebrook/devicetree.cb
index 2a0558e190..87d3fc0f94 100644
--- a/src/mainboard/intel/saddlebrook/devicetree.cb
+++ b/src/mainboard/intel/saddlebrook/devicetree.cb
@@ -23,7 +23,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsSdCardEnabled" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "0"
 
 	register "SaGv" = "SaGv_Enabled"
 	register "PmTimerDisabled" = "0"
@@ -211,6 +210,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 off end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/libretrend/lt1000/devicetree.cb b/src/mainboard/libretrend/lt1000/devicetree.cb
index a58e169b8c..a355ee4169 100644
--- a/src/mainboard/libretrend/lt1000/devicetree.cb
+++ b/src/mainboard/libretrend/lt1000/devicetree.cb
@@ -54,7 +54,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsSdCardEnabled" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "1"
 	register "SaGv" = "SaGv_Enabled"
 	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
@@ -174,6 +173,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/protectli/vault_kbl/devicetree.cb b/src/mainboard/protectli/vault_kbl/devicetree.cb
index 9071a7b377..16400111ac 100644
--- a/src/mainboard/protectli/vault_kbl/devicetree.cb
+++ b/src/mainboard/protectli/vault_kbl/devicetree.cb
@@ -43,7 +43,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsSdCardEnabled" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "0"
 	register "HeciEnabled" = "1"
 	register "PmTimerDisabled" = "1"
 	register "SaGv" = "SaGv_Enabled"
@@ -219,6 +218,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 off end # SA thermal subsystem
 		device pci 08.0 off end # Gaussian Mixture Model
 		device pci 13.0 off end # Integrated Sensor Hub
 		device pci 14.0 on  end # USB xHCI
diff --git a/src/mainboard/purism/librem_skl/devicetree.cb b/src/mainboard/purism/librem_skl/devicetree.cb
index 5aa51d3e06..18e02e7029 100644
--- a/src/mainboard/purism/librem_skl/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/devicetree.cb
@@ -60,7 +60,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "0"
 	register "SaGv" = "3"
 	register "PmConfigSlpS3MinAssert" = "2"		# 50ms
@@ -171,6 +170,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 04.0 on  end # SA thermal subsystem
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 on  end # USB xDCI (OTG)
 		device pci 14.2 on  end # Thermal Subsystem
diff --git a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
index 01aec8b948..4306da6b36 100644
--- a/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
+++ b/src/mainboard/razer/blade_stealth_kbl/devicetree.cb
@@ -40,7 +40,6 @@ chip soc/intel/skylake
 	register "ScsSdCardEnabled" = "0"
 	register "PttSwitch" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "HeciEnabled" = "1"
 	register "SaGv" = "SaGv_Enabled"
 	register "PmConfigSlpS3MinAssert" = "2"		# 50ms
@@ -189,7 +188,7 @@ chip soc/intel/skylake
 	device domain 0 on
 		device pci 00.0 on  end # Host Bridge
 		device pci 02.0 on  end # Integrated Graphics Device
-		device pci 04.0 off end # Thermal Subsystem
+		device pci 04.0 on  end # Thermal Subsystem
 		device pci 08.0 off end # Gaussian Mixture Model
 		device pci 14.0 on  end # USB xHCI
 		device pci 14.1 off end # USB xDCI (OTG)
diff --git a/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb b/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
index 51c3cec2b6..435015b93f 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
+++ b/src/mainboard/supermicro/x11-lga1151-series/devicetree.cb
@@ -10,7 +10,6 @@ chip soc/intel/skylake
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsSdCardEnabled" = "0"
 	register "SkipExtGfxScan" = "1"
-	register "Device4Enable" = "1"
 	register "SaGv" = "SaGv_Disabled"
 
 	# SATA configuration
diff --git a/src/soc/intel/skylake/chip.c b/src/soc/intel/skylake/chip.c
index 562d791a6d..6423cf4120 100644
--- a/src/soc/intel/skylake/chip.c
+++ b/src/soc/intel/skylake/chip.c
@@ -278,7 +278,9 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	params->PchHdaVcType = config->PchHdaVcType;
 	params->PchHdaIoBufferOwnership = config->IoBufferOwnership;
 	params->PchHdaDspEnable = config->DspEnable;
-	params->Device4Enable = config->Device4Enable;
+
+	dev = pcidev_path_on_root(SA_DEVFN_TS);
+	params->Device4Enable = dev && dev->enabled;
 	params->EnableTcoTimer = !config->PmTimerDisabled;
 
 
diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h
index fc86cfd58f..e332a6bb8e 100644
--- a/src/soc/intel/skylake/chip.h
+++ b/src/soc/intel/skylake/chip.h
@@ -336,7 +336,6 @@ struct soc_intel_skylake_config {
 	u32 LogoPtr;
 	u32 LogoSize;
 	u32 GraphicsConfigPtr;
-	u8 Device4Enable;
 	u8 RtcLock;
 	/* GPIO IRQ Route  The valid values is 14 or 15*/
 	u8 GpioIrqSelect;