diff --git a/src/mainboard/starlabs/starbook/Kconfig b/src/mainboard/starlabs/starbook/Kconfig
index 0e23ecf62c..8f51db4525 100644
--- a/src/mainboard/starlabs/starbook/Kconfig
+++ b/src/mainboard/starlabs/starbook/Kconfig
@@ -60,6 +60,12 @@ config CCD_PORT
 	default 6 if BOARD_STARLABS_LABTOP_CML
 	default 3
 
+config CMOS_DEFAULT_FILE
+	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/variants/\$(CONFIG_VARIANT_DIR)/cmos.default" if BOARD_STARLABS_STARBOOK_TGL
+
+config CMOS_LAYOUT_FILE
+	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/variants/\$(CONFIG_VARIANT_DIR)/cmos.layout" if BOARD_STARLABS_STARBOOK_TGL
+
 config DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
diff --git a/src/mainboard/starlabs/starbook/cmos.default b/src/mainboard/starlabs/starbook/cmos.default
index 0783adf403..f1276cc6ed 100644
--- a/src/mainboard/starlabs/starbook/cmos.default
+++ b/src/mainboard/starlabs/starbook/cmos.default
@@ -7,14 +7,11 @@ hyper_threading=Enable
 vtd=Enable
 power_profile=Balanced
 me_state=Disable
-smi_handler=Enable
 # Devices
 wireless=Enable
 webcam=Enable
 microphone=Enable
 legacy_8254_timer=Disable
-usb_always_on=Disable
-thunderbolt=Disable
 # EC
 kbl_timeout=30 seconds
 fn_ctrl_swap=Disable
diff --git a/src/mainboard/starlabs/starbook/cmos.layout b/src/mainboard/starlabs/starbook/cmos.layout
index 85ec47772c..887c0b21b9 100644
--- a/src/mainboard/starlabs/starbook/cmos.layout
+++ b/src/mainboard/starlabs/starbook/cmos.layout
@@ -22,15 +22,12 @@ entries
 424	2	e	7	power_profile
 432	1	e	5	me_state
 440	4	h	0	me_state_counter
-448	1	e	1	smi_handler
 
 # coreboot config options: Devices
 504	1	e	1	wireless
 512	1	e	1	webcam
 520	1	e	1	microphone
 528	1	e	1	legacy_8254_timer
-536	1	e	1	usb_always_on
-544	1	e	1	thunderbolt
 
 # coreboot config options: EC
 600	3	e	4	kbl_timeout
diff --git a/src/mainboard/starlabs/starbook/variants/tgl/cmos.default b/src/mainboard/starlabs/starbook/variants/tgl/cmos.default
new file mode 100644
index 0000000000..cfc9a612fb
--- /dev/null
+++ b/src/mainboard/starlabs/starbook/variants/tgl/cmos.default
@@ -0,0 +1,25 @@
+# hardcoded
+boot_option=Fallback
+# console
+debug_level=Debug
+# cpu
+hyper_threading=Enable
+vtd=Enable
+power_profile=Balanced
+me_state=Disable
+# Devices
+wireless=Enable
+webcam=Enable
+microphone=Enable
+legacy_8254_timer=Disable
+thunderbolt=Disable
+# EC
+kbl_timeout=30 seconds
+fn_ctrl_swap=Disable
+# southbridge
+power_on_after_fail=Disable
+# Functions
+fn_lock_state=0x1
+trackpad_state=0x1
+kbl_brightness=0x0
+kbl_state=0x1
diff --git a/src/mainboard/starlabs/starbook/variants/tgl/cmos.layout b/src/mainboard/starlabs/starbook/variants/tgl/cmos.layout
new file mode 100644
index 0000000000..c4a49c5dba
--- /dev/null
+++ b/src/mainboard/starlabs/starbook/variants/tgl/cmos.layout
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# -----------------------------------------------------------------
+entries
+
+# Bank: 1
+# -----------------------------------------------------------------
+0	120	r	0	reserved_memory
+
+# -----------------------------------------------------------------
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384	1	e	2	boot_option
+388	4	h	0	reboot_counter
+
+# -----------------------------------------------------------------
+# coreboot config options: console
+395	4	e	3	debug_level
+# coreboot config options: cpu
+#400	8	r	0	reserved for century byte
+408	1	e	1	hyper_threading
+416	1	e	1	vtd
+424	2	e	7	power_profile
+432	1	e	5	me_state
+440	4	h	0	me_state_counter
+
+# coreboot config options: Devices
+504	1	e	1	wireless
+512	1	e	1	webcam
+520	1	e	1	microphone
+528	1	e	1	legacy_8254_timer
+536	1	e	1	thunderbolt
+
+# coreboot config options: EC
+600	3	e	4	kbl_timeout
+608	1	e	1	fn_ctrl_swap
+616	2	e	8	max_charge
+624	2	e	9	fan_mode
+
+# coreboot config options: southbridge
+800	2	e	6	power_on_after_fail
+
+# coreboot config options: check sums
+984	16	h	0	check_sum
+
+# Bank: 2
+# embedded controller settings (outside the checksummed area)
+1024	8	h	1	fn_lock_state
+1032	8	h	1	trackpad_state
+1040	8	h	10	kbl_brightness
+1048	8	h	1	kbl_state
+
+# -----------------------------------------------------------------
+
+enumerations
+
+#ID	value	text
+1	0	Disable
+1	1	Enable
+
+2	0	Fallback
+2	1	Normal
+
+3	0	Emergency
+3	1	Alert
+3	2	Critical
+3	3	Error
+3	4	Warning
+3	5	Notice
+3	6	Info
+3	7	Debug
+3	8	Spew
+
+4	0	30 seconds
+4	1	1 minute
+4	2	3 minutes
+4	3	5 minutes
+4	4	Never
+
+5	0	Enable
+5	1	Disable
+
+6	0	Disable
+6	1	Enable
+6	2	Keep
+
+7	0	Power Saver
+7	1	Balanced
+7	2	Performance
+
+8	0	100%
+8	1	80%
+8	2	60%
+
+9	0	Normal
+9	1	Aggressive
+9	2	Quiet
+
+10	0	Off
+10	1	Low
+10	2	High
+10	3	On
+
+# -----------------------------------------------------------------
+checksums
+
+checksum 392 983 984