google/caroline: Add as a variant of glados

Add google/caroline (Samsung Chromebook Pro) as a variant of
glados Skylake reference board:
- add caroline-specific DPTF, EC config, GPIO config, Kconfig,
    NHLT config, PEI data, VBT, SPD data, and devicetree
- add caroline-specific memory-init param to romstage
- adjust mainboard EC SCI events for boards with tablet function

Adapted from Chromium branch firmware-glados-7820.B, commit
b0c3efe54d877246d07f2467b2dff51cc30348fa [soc/intel/skylake: Enable VMX]

Test: build/boot google/caroline, verify correct functionality

Change-Id: I611a4e76581ba2e5b42e1bc48b0a5b8c70f3598e
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/27419
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

14 files changed, 933 insertions, 0 deletions

diff --git a/src/mainboard/google/glados/Kconfig b/src/mainboard/google/glados/Kconfig
index 8ff5472541..214ad13390 100644
--- a/src/mainboard/google/glados/Kconfig
+++ b/src/mainboard/google/glados/Kconfig
@@ -36,6 +36,7 @@ config MAINBOARD_DIR
 
 config MAINBOARD_PART_NUMBER
 	string
+	default "Caroline" if BOARD_GOOGLE_CAROLINE
 	default "Chell" if BOARD_GOOGLE_CHELL
 	default "Glados" if BOARD_GOOGLE_GLADOS
 	default "Lars" if BOARD_GOOGLE_LARS
@@ -47,6 +48,7 @@ config MAINBOARD_FAMILY
 
 config VARIANT_DIR
 	string
+	default "caroline" if BOARD_GOOGLE_CAROLINE
 	default "chell" if BOARD_GOOGLE_CHELL
 	default "glados" if BOARD_GOOGLE_GLADOS
 	default "lars" if BOARD_GOOGLE_LARS
@@ -54,6 +56,7 @@ config VARIANT_DIR
 
 config DEVICETREE
 	string
+	default "variants/caroline/devicetree.cb" if BOARD_GOOGLE_CAROLINE
 	default "variants/chell/devicetree.cb" if BOARD_GOOGLE_CHELL
 	default "variants/glados/devicetree.cb" if BOARD_GOOGLE_GLADOS
 	default "variants/lars/devicetree.cb" if BOARD_GOOGLE_LARS
@@ -87,6 +90,7 @@ config EC_GOOGLE_CHROMEEC_PD_BOARDNAME
 config GBB_HWID
 	string
 	depends on CHROMEOS
+	default "CAROLINE TEST 0958" if BOARD_GOOGLE_CAROLINE
 	default "CHELL TEST 6297" if BOARD_GOOGLE_CHELL
 	default "GLADOS TEST 1988" if BOARD_GOOGLE_GLADOS
 	default "LARS TEST 5001" if BOARD_GOOGLE_LARS
diff --git a/src/mainboard/google/glados/Kconfig.name b/src/mainboard/google/glados/Kconfig.name
index 6ad8b191c2..8538a2b006 100644
--- a/src/mainboard/google/glados/Kconfig.name
+++ b/src/mainboard/google/glados/Kconfig.name
@@ -1,5 +1,14 @@
 comment "Glados"
 
+config BOARD_GOOGLE_CAROLINE
+	bool "->  Caroline (Samsung Chromebook Pro)"
+	select BOARD_GOOGLE_BASEBOARD_GLADOS
+	select DRIVERS_INTEL_WIFI
+	select DSAR_ENABLE
+	select NHLT_SSM4567 if INCLUDE_NHLT_BLOBS
+	select SAR_ENABLE
+	select USE_SAR
+
 config BOARD_GOOGLE_CHELL
 	bool "->  Chell (HP Chromebook 13 G1)"
 	select BOARD_GOOGLE_BASEBOARD_GLADOS
diff --git a/src/mainboard/google/glados/ec.h b/src/mainboard/google/glados/ec.h
index fcb0a70796..e893a28dee 100644
--- a/src/mainboard/google/glados/ec.h
+++ b/src/mainboard/google/glados/ec.h
@@ -19,7 +19,26 @@
 
 #include <ec/ec.h>
 #include <ec/google/chromeec/ec_commands.h>
+#include <variant/ec.h>
 
+#ifdef EC_ENABLE_TABLET_EVENT
+#define MAINBOARD_EC_SCI_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED)        |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN)          |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED)      |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED)   |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW)       |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL)  |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY)           |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS)    |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_THRESHOLD) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THROTTLE_START)    |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THROTTLE_STOP)     |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_CHARGER)       |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)            |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MKBP)              |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MODE_CHANGE))
+#else
 #define MAINBOARD_EC_SCI_EVENTS \
 	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED)        |\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN)          |\
@@ -35,6 +54,7 @@
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_CHARGER)       |\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)            |\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MKBP))
+#endif
 
 #define MAINBOARD_EC_SMI_EVENTS \
 	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED))
diff --git a/src/mainboard/google/glados/romstage.c b/src/mainboard/google/glados/romstage.c
index 4f93f61114..5eeb583379 100644
--- a/src/mainboard/google/glados/romstage.c
+++ b/src/mainboard/google/glados/romstage.c
@@ -71,4 +71,6 @@ void mainboard_memory_init_params(struct romstage_params *params,
 			sizeof(params->pei_data->RcompTarget));
 	memory_params->MemorySpdDataLen = SPD_LEN;
 	memory_params->DqPinsInterleaved = FALSE;
+	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_CAROLINE))
+		memory_params->DdrFreqLimit = 1600;
 }
diff --git a/src/mainboard/google/glados/spd/samsung_dimm_K4EBE304EB-EGCG.spd.hex b/src/mainboard/google/glados/spd/samsung_dimm_K4EBE304EB-EGCG.spd.hex
new file mode 100644
index 0000000000..685b7c9292
--- /dev/null
+++ b/src/mainboard/google/glados/spd/samsung_dimm_K4EBE304EB-EGCG.spd.hex
@@ -0,0 +1,16 @@
+91 20 F1 03 05 1A 05 0A 03 11 01 08 08 00 50 15
+78 78 90 50 90 11 50 E0 90 06 3C 3C 01 90 00 00
+00 00 C2 08 00 00 00 A8 00 88 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 80 CE 01 00 00 55 00 00 00 00 00
+4B 34 45 42 45 33 30 34 45 42 2D 45 47 43 47 20
+20 20 00 00 80 CE 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
\ No newline at end of file
diff --git a/src/mainboard/google/glados/variants/caroline/Makefile.inc b/src/mainboard/google/glados/variants/caroline/Makefile.inc
new file mode 100644
index 0000000000..21b20e6912
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/Makefile.inc
@@ -0,0 +1,40 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2016 Google Inc.
+## Copyright (C) 2016 Intel Corporation
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+romstage-y += variant.c
+ramstage-y += variant.c
+smm-y += variant.c
+
+SPD_BIN = $(obj)/spd.bin
+
+# SPD data by index
+SPD_SOURCES  = samsung_dimm_K4E8E324EB-EGCF     # 0b0000
+SPD_SOURCES += samsung_dimm_K4E6E304EB-EGCF     # 0b0001
+SPD_SOURCES += samsung_dimm_K4EBE304EB-EGCG     # 0b0010
+
+SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
+
+# Include spd ROM data
+$(SPD_BIN): $(SPD_DEPS)
+	for f in $+; \
+	  do for c in $$(cat $$f | grep -v ^#); \
+	    do printf $$(printf '\%o' 0x$$c); \
+	  done; \
+	done > $@
+
+cbfs-files-y += spd.bin
+spd.bin-file := $(SPD_BIN)
+spd.bin-type := spd
diff --git a/src/mainboard/google/glados/variants/caroline/board_info.txt b/src/mainboard/google/glados/variants/caroline/board_info.txt
new file mode 100644
index 0000000000..3a71b45627
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/board_info.txt
@@ -0,0 +1,6 @@
+Vendor name: Google
+Board name: Caroline (Samsung Chromebook Pro)
+Category: laptop
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
diff --git a/src/mainboard/google/glados/variants/caroline/data.vbt b/src/mainboard/google/glados/variants/caroline/data.vbt
new file mode 100644
index 0000000000..02e1cd10f6
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/data.vbt
diff --git a/src/mainboard/google/glados/variants/caroline/devicetree.cb b/src/mainboard/google/glados/variants/caroline/devicetree.cb
new file mode 100644
index 0000000000..f892187361
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/devicetree.cb
@@ -0,0 +1,268 @@
+chip soc/intel/skylake
+
+	# Enable deep Sx states
+	register "deep_s3_enable_ac" = "0"
+	register "deep_s3_enable_dc" = "0"
+	register "deep_s5_enable_ac" = "1"
+	register "deep_s5_enable_dc" = "1"
+	register "deep_sx_config" = "DSX_EN_LAN_WAKE_PIN"
+
+	# GPE configuration
+	# Note that GPE events called out in ASL code rely on this
+	# route. i.e. If this route changes then the affected GPE
+	# offset bits also need to be changed.
+	register "gpe0_dw0" = "GPP_B"
+	register "gpe0_dw1" = "GPP_D"
+	register "gpe0_dw2" = "GPP_E"
+
+	# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
+	register "gen1_dec" = "0x00fc0801"
+	register "gen2_dec" = "0x000c0201"
+
+	# Enable "Intel Speed Shift Technology"
+	register "speed_shift_enable" = "1"
+
+	# Enable DPTF
+	register "dptf_enable" = "1"
+
+	# FSP Configuration
+	register "ProbelessTrace" = "0"
+	register "EnableLan" = "0"
+	register "EnableSata" = "0"
+	register "SataSalpSupport" = "0"
+	register "SataMode" = "0"
+	register "SataPortsEnable[0]" = "0"
+	register "EnableAzalia" = "1"
+	register "DspEnable" = "1"
+	register "IoBufferOwnership" = "3"
+	register "EnableTraceHub" = "0"
+	register "SsicPortEnable" = "0"
+	register "SmbusEnable" = "1"
+	register "Cio2Enable" = "0"
+	register "ScsEmmcEnabled" = "1"
+	register "ScsEmmcHs400Enabled" = "1"
+	register "ScsSdCardEnabled" = "2"
+	register "PttSwitch" = "0"
+	register "InternalGfx" = "1"
+	register "SkipExtGfxScan" = "1"
+	register "Device4Enable" = "1"
+	register "HeciEnabled" = "0"
+	register "SaGv" = "3"
+	register "SerialIrqConfigSirqEnable" = "1"
+	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
+	register "PmConfigSlpS4MinAssert" = "1"        # 1s
+	register "PmConfigSlpSusMinAssert" = "1"       # 500ms
+	register "PmConfigSlpAMinAssert" = "3"         # 2s
+	register "PmTimerDisabled" = "1"
+
+	# TCC offset
+	register "tcc_offset" = "10"
+
+	# VR Slew rate setting for improving audible noise
+	register "AcousticNoiseMitigation" = "1"
+	register "SlowSlewRateForIa" = "3"	# Fast/16
+	register "SlowSlewRateForGt" = "3"	# Fast/16
+	register "SlowSlewRateForSa" = "0"	# Fast/2
+	register "FastPkgCRampDisable" = "0"
+
+	# VR Settings Configuration for 5 Domains
+	#+----------------+-------+-------+-------------+-------------+-------+
+	#| Domain/Setting |  SA   |  IA   | Ring Sliced | GT Unsliced |  GT   |
+	#+----------------+-------+-------+-------------+-------------+-------+
+	#| Psi1Threshold  | 20A   | 20A   | 20A         | 20A         | 20A   |
+	#| Psi2Threshold  | 4A    | 5A    | 5A          | 5A          | 5A    |
+	#| Psi3Threshold  | 1A    | 1A    | 1A          | 1A          | 1A    |
+	#| Psi3Enable     | 1     | 1     | 1           | 1           | 1     |
+	#| Psi4Enable     | 1     | 1     | 1           | 1           | 1     |
+	#| ImonSlope      | 0     | 0     | 0           | 0           | 0     |
+	#| ImonOffset     | 0     | 0     | 0           | 0           | 0     |
+	#| IccMax         | 7A    | 34A   | 34A         | 35A         | 35A   |
+	#| VrVoltageLimit | 1.52V | 1.52V | 1.52V       | 1.52V       | 1.52V |
+	#+----------------+-------+-------+-------------+-------------+-------+
+	register "domain_vr_config[VR_SYSTEM_AGENT]" = "{
+		.vr_config_enable = 1,
+		.psi1threshold = VR_CFG_AMP(20),
+		.psi2threshold = VR_CFG_AMP(4),
+		.psi3threshold = VR_CFG_AMP(1),
+		.psi3enable = 1,
+		.psi4enable = 1,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(4),
+		.voltage_limit = 1520,
+	}"
+
+	register "domain_vr_config[VR_IA_CORE]" = "{
+		.vr_config_enable = 1,
+		.psi1threshold = VR_CFG_AMP(20),
+		.psi2threshold = VR_CFG_AMP(5),
+		.psi3threshold = VR_CFG_AMP(1),
+		.psi3enable = 1,
+		.psi4enable = 1,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(24),
+		.voltage_limit = 1520,
+	}"
+
+	register "domain_vr_config[VR_RING]" = "{
+		.vr_config_enable = 1,
+		.psi1threshold = VR_CFG_AMP(20),
+		.psi2threshold = VR_CFG_AMP(5),
+		.psi3threshold = VR_CFG_AMP(1),
+		.psi3enable = 1,
+		.psi4enable = 1,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(24),
+		.voltage_limit = 1520,
+	}"
+
+	register "domain_vr_config[VR_GT_UNSLICED]" = "{
+		.vr_config_enable = 1,
+		.psi1threshold = VR_CFG_AMP(20),
+		.psi2threshold = VR_CFG_AMP(5),
+		.psi3threshold = VR_CFG_AMP(1),
+		.psi3enable = 1,
+		.psi4enable = 1,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(24),
+		.voltage_limit = 1520,
+	}"
+
+	register "domain_vr_config[VR_GT_SLICED]" = "{
+		.vr_config_enable = 1,
+		.psi1threshold = VR_CFG_AMP(20),
+		.psi2threshold = VR_CFG_AMP(5),
+		.psi3threshold = VR_CFG_AMP(1),
+		.psi3enable = 1,
+		.psi4enable = 1,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(24),
+		.voltage_limit = 1520,
+	}"
+
+	# Enable Root port 1.
+	register "PcieRpEnable[0]" = "1"
+	# Enable CLKREQ#
+	register "PcieRpClkReqSupport[0]" = "1"
+	# RP 1 uses SRCCLKREQ1#
+	register "PcieRpClkReqNumber[0]" = "1"
+
+	register "usb2_ports[0]" = "USB2_PORT_MID(OC_SKIP)"	# Type-C Port (main)
+	register "usb2_ports[1]" = "USB2_PORT_MAX(OC_SKIP)"     # Type-C Port (sub)
+	register "usb2_ports[2]" = "USB2_PORT_MID(OC_SKIP)"     # Bluetooth
+	register "usb2_ports[4]" = "USB2_PORT_EMPTY"   		# Empty
+	register "usb2_ports[6]" = "USB2_PORT_FLEX(OC_SKIP)"    # Camera
+	register "usb2_ports[8]" = "USB2_PORT_EMPTY"   		# Empty
+
+	register "usb3_ports[0]" = "USB3_PORT_DEFAULT(OC_SKIP)" # Type-C Port (main)
+	register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC_SKIP)" # Type-C Port (sub)
+	register "usb3_ports[2]" = "USB3_PORT_EMPTY"   		# Empty
+	register "usb3_ports[3]" = "USB3_PORT_EMPTY"   		# Empty
+
+	# Must leave UART0 enabled or SD/eMMC will not work as PCI
+	register "SerialIoDevMode" = "{
+		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C1]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C2]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C3]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C4]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C5]  = PchSerialIoDisabled,
+		[PchSerialIoIndexSpi0]  = PchSerialIoDisabled,
+		[PchSerialIoIndexSpi1]  = PchSerialIoDisabled,
+		[PchSerialIoIndexUart0] = PchSerialIoPci,
+		[PchSerialIoIndexUart1] = PchSerialIoDisabled,
+		[PchSerialIoIndexUart2] = PchSerialIoSkipInit,
+	}"
+
+	# I2C4 is 1.8V
+	register "i2c_voltage[4]" = "I2C_VOLTAGE_1V8"
+
+	# PL2 override 15W
+	register "tdp_pl2_override" = "15"
+
+	# Lock Down
+	register "common_soc_config" = "{
+		.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT
+	}"
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+	device domain 0 on
+		device pci 00.0 on  end # Host Bridge
+		device pci 02.0 on  end # Integrated Graphics Device
+		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
+		device pci 15.0 on
+			chip drivers/i2c/generic
+				register "hid" = ""ATML0001""
+				register "desc" = ""Atmel Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_E7_IRQ)"
+				device i2c 4b on end
+			end
+		end # I2C #0
+		device pci 15.1 on
+			chip drivers/i2c/generic
+				register "hid" = ""ATML0000""
+				register "desc" = ""Atmel Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_B3_IRQ)"
+				register "wake" = "GPE0_DW0_05"
+				device i2c 4a on end
+			end
+		end # I2C #1
+		device pci 15.2 on  end # I2C #2
+		device pci 15.3 off end # I2C #3
+		device pci 16.0 on  end # Management Engine Interface 1
+		device pci 16.1 off end # Management Engine Interface 2
+		device pci 16.2 off end # Management Engine IDE-R
+		device pci 16.3 off end # Management Engine KT Redirection
+		device pci 16.4 off end # Management Engine Interface 3
+		device pci 17.0 off end # SATA
+		device pci 19.0 on  end # UART #2
+		device pci 19.1 off end # I2C #5
+		device pci 19.2 on  end # I2C #4
+		device pci 1c.0 on
+			chip drivers/intel/wifi
+				register "wake" = "GPE0_DW0_16"
+				device pci 00.0 on end
+			end
+		end # PCI Express Port 1
+		device pci 1c.1 off end # PCI Express Port 2
+		device pci 1c.2 off end # PCI Express Port 3
+		device pci 1c.3 off end # PCI Express Port 4
+		device pci 1c.4 off end # PCI Express Port 5
+		device pci 1c.5 off end # PCI Express Port 6
+		device pci 1c.6 off end # PCI Express Port 7
+		device pci 1c.7 off end # PCI Express Port 8
+		device pci 1d.0 off end # PCI Express Port 9
+		device pci 1d.1 off end # PCI Express Port 10
+		device pci 1d.2 off end # PCI Express Port 11
+		device pci 1d.3 off end # PCI Express Port 12
+		device pci 1e.0 on  end # UART #0
+		device pci 1e.1 off end # UART #1
+		device pci 1e.2 off end # GSPI #0
+		device pci 1e.3 off end # GSPI #1
+		device pci 1e.4 on  end # eMMC
+		device pci 1e.5 off end # SDIO
+		device pci 1e.6 on  end # SDCard
+		device pci 1f.0 on
+			chip drivers/pc80/tpm
+				device pnp 0c31.0 on end
+			end
+			chip ec/google/chromeec
+				device pnp 0c09.0 on end
+			end
+		end # LPC Interface
+		device pci 1f.1 on  end # P2SB
+		device pci 1f.2 on  end # Power Management Controller
+		device pci 1f.3 on  end # Intel HDA
+		device pci 1f.4 on  end # SMBus
+		device pci 1f.5 on  end # PCH SPI
+		device pci 1f.6 off end # GbE
+	end
+end
diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/acpi/dptf.asl b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/dptf.asl
new file mode 100644
index 0000000000..064cd018e4
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/dptf.asl
@@ -0,0 +1,102 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ * Copyright (C) 2016 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#define DPTF_CPU_PASSIVE        80
+#define DPTF_CPU_CRITICAL	100
+
+#define DPTF_TSR0_SENSOR_ID	1
+#define DPTF_TSR0_SENSOR_NAME	"Ambient"
+#define DPTF_TSR0_PASSIVE	48
+#define DPTF_TSR0_CRITICAL	90
+#define DPTF_TSR0_TABLET_PASSIVE	44
+#define DPTF_TSR0_TABLET_CRITICAL	90
+
+#define DPTF_TSR1_SENSOR_ID	2
+#define DPTF_TSR1_SENSOR_NAME	"Charger"
+#define DPTF_TSR1_PASSIVE	48
+#define DPTF_TSR1_CRITICAL	90
+#define DPTF_TSR1_TABLET_PASSIVE	44
+#define DPTF_TSR1_TABLET_CRITICAL	90
+
+#define DPTF_TSR2_SENSOR_ID	3
+#define DPTF_TSR2_SENSOR_NAME	"DRAM"
+#define DPTF_TSR2_PASSIVE	48
+#define DPTF_TSR2_CRITICAL	90
+#define DPTF_TSR2_TABLET_PASSIVE	44
+#define DPTF_TSR2_TABLET_CRITICAL	90
+
+#define DPTF_TSR3_SENSOR_ID	4
+#define DPTF_TSR3_SENSOR_NAME	"WiFi"
+#define DPTF_TSR3_PASSIVE	48
+#define DPTF_TSR3_CRITICAL	90
+#define DPTF_TSR3_TABLET_PASSIVE	44
+#define DPTF_TSR3_TABLET_CRITICAL	90
+
+/* SKL-Y is Fanless design */
+#undef DPTF_ENABLE_FAN_CONTROL
+
+/* Enable DPTF charger control */
+#define DPTF_ENABLE_CHARGER
+
+/* Charger performance states, board-specific values from charger and EC */
+Name (CHPS, Package () {
+	Package () { 0, 0, 0, 0, 255, 0xbb8, "mA", 0 },	/* 3000mA (MAX) */
+	Package () { 0, 0, 0, 0, 24, 0x600, "mA", 0 },	/* 1500mA */
+	Package () { 0, 0, 0, 0, 16, 0x400, "mA", 0 },	/* 1000mA */
+	Package () { 0, 0, 0, 0, 8, 0x200, "mA", 0 },	/* 500mA */
+	Package () { 0, 0, 0, 0, 8, 0x200, "mA", 0 },	/* 500mA */
+})
+
+Name (DTRT, Package () {
+	/* CPU Throttle Effect on CPU */
+	Package () { \_SB.PCI0.B0D4, \_SB.PCI0.B0D4, 100, 10, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 0 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR0, 100, 600, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 1 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR1, 100, 600, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 2 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR2, 100, 90, 0, 0, 0, 0 },
+
+	/* Charger Effect on Temp Sensor 2 */
+	Package () { \_SB.DPTF.TCHG, \_SB.DPTF.TSR2, 200, 600, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 3 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR3, 100, 600, 0, 0, 0, 0 },
+})
+
+Name (MPPC, Package ()
+{
+	0x2,		/* Revision */
+	Package () {	/* Power Limit 1 */
+		0,	/* PowerLimitIndex, 0 for Power Limit 1 */
+		3000,	/* PowerLimitMinimum */
+		7000,	/* PowerLimitMaximum */
+		5000,	/* TimeWindowMinimum */
+		5000,	/* TimeWindowMaximum */
+		200	/* StepSize */
+	},
+	Package () {	/* Power Limit 2 */
+		1,	/* PowerLimitIndex, 1 for Power Limit 2 */
+		15000,	/* PowerLimitMinimum */
+		15000,	/* PowerLimitMaximum */
+		1000,	/* TimeWindowMinimum */
+		1000,	/* TimeWindowMaximum */
+		1000	/* StepSize */
+	}
+})
diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl
new file mode 100644
index 0000000000..19c883483b
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl
@@ -0,0 +1,128 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <variant/gpio.h>
+
+#define BOARD_DIG_I2C_ADDR			0x09
+#define BOARD_DIG_IRQ				DIG_INT_L
+#define BOARD_DIG_PDCT				DIG_PDCT_L
+#define BOARD_DIG_EJECT				GPE_DIG_EJECT
+
+Scope (\_SB)
+{
+	Device (PENH)
+	{
+		Name (_HID, "PRP0001")
+
+		Name (_CRS, ResourceTemplate () {
+			GpioIo (Exclusive, PullNone, 0, 0, IoRestrictionInputOnly,
+				"\\_SB.PCI0.GPIO", 0, ResourceConsumer) { GPIO_DIG_EJECT }
+		})
+
+		Name (_DSD, Package () {
+			ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package () {
+				Package () {
+					"compatible",
+					Package () { "gpio-keys"}
+				},
+			}
+		})
+
+		Device (EJCT)
+		{
+			Name (_ADR, Zero)
+
+			Name (_DSD, Package () {
+				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+				Package () {
+					/* SW_PEN_INSERTED */
+					Package () { "linux,code", 0xf },
+					/* EV_SW type */
+					Package () { "linux,input-type", 0x5 },
+					Package () { "label", "pen_eject" },
+					Package () { "gpios",
+						Package () {
+							^^PENH, 0, 0, 1 /* inserted active low */
+						}
+					},
+				}
+			})
+		}
+	}
+}
+
+Scope (\_SB.PCI0.I2C2)
+{
+	Name (FMCN, Package () { 87, 197, 26 })
+
+	Device (DIGI)
+	{
+		Name (_HID, "ACPI0C50")
+		Name (_CID, "PNP0C50")
+		Name (_UID, 1)
+		Name (_S0W, 4)
+		Name (_PRW, Package () { BOARD_DIG_EJECT, 3 })
+
+		Name (_CRS, ResourceTemplate ()
+		{
+			I2cSerialBus (
+				BOARD_DIG_I2C_ADDR,
+				ControllerInitiated,
+				400000,
+				AddressingMode7Bit,
+				"\\_SB.PCI0.I2C2",
+			)
+			Interrupt (ResourceConsumer, Level, ActiveLow)
+			{
+				BOARD_DIG_IRQ
+			}
+		})
+
+		/*
+		 * Function 1 returns the offset in the I2C device register
+		 * address space at which the HID descriptor can be read.
+		 *
+		 * Arg0 = UUID
+		 * Arg1 = revision number of requested function
+		 * Arg2 = requested function number
+		 * Arg3 = function specific parameter
+		 */
+		Method (_DSM, 4, NotSerialized)
+		{
+			If (LEqual (Arg0, ToUUID
+			            ("3cdff6f7-4267-4555-ad05-b30a3d8938de"))) {
+				If (LEqual (Arg2, Zero)) {
+					/* Function 0 - Query */
+					If (LEqual (Arg1, One)) {
+						/* Revision 1 Function 1 */
+						Return (Buffer (One) { 0x03 })
+					} Else {
+						/* Revision 2+ not supported */
+						Return (Buffer (One) { 0x00 })
+					}
+				} ElseIf (LEqual (Arg2, One)) {
+					/* Function 1 - HID Descriptor Addr */
+					Return (0x0001)
+				} Else {
+					/* Function 2+ not supported */
+					Return (Buffer (One) { 0x00 })
+				}
+			} Else {
+				Return (Buffer (One) { 0x00 })
+			}
+		}
+	}
+}
diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/ec.h b/src/mainboard/google/glados/variants/caroline/include/variant/ec.h
new file mode 100644
index 0000000000..a7ed20cec0
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/ec.h
@@ -0,0 +1,17 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/* EC ENABLE TABLET EVENT */
+#define EC_ENABLE_TABLET_EVENT
diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h b/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h
new file mode 100644
index 0000000000..d20252f7d0
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h
@@ -0,0 +1,254 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+/* EC in RW */
+#define GPIO_EC_IN_RW		GPP_C6
+
+/* BIOS Flash Write Protect */
+#define GPIO_PCH_WP		GPP_C23
+
+/* Memory configuration board straps */
+#define GPIO_MEM_CONFIG_0	GPP_C12
+#define GPIO_MEM_CONFIG_1	GPP_C13
+#define GPIO_MEM_CONFIG_2	GPP_C14
+#define GPIO_MEM_CONFIG_3	GPP_C15
+
+/* EC wake is LAN_WAKE# which is a special DeepSX wake pin */
+#define GPE_EC_WAKE		GPE0_LAN_WAK
+
+/* GPP_B16 is WLAN_WAKE. GPP_B group is routed to DW0 in the GPE0 block */
+#define GPE_WLAN_WAKE		GPE0_DW0_16
+
+/* GPP_B5 is TOUCHPAD WAKE. GPP_B group is routed to DW0 in the GPE0 block */
+#define GPE_TOUCHPAD_WAKE	GPE0_DW0_05
+
+/* GPP_B15 is DIG_EJECT. GPP_B group is routed to DW0 in the GPE0 block */
+#define GPE_DIG_EJECT		GPE0_DW0_15
+/* Notification DIG_EJECT */
+#define GPIO_DIG_EJECT		GPP_B19
+
+/* Input device interrupt configuration */
+#define TOUCHPAD_INT_L		GPP_B3_IRQ
+#define TOUCHSCREEN_INT_L	GPP_E7_IRQ
+#define MIC_INT_L		GPP_F10_IRQ
+#define DIG_INT_L		GPP_F11_IRQ
+#define DIG_PDCT_L		GPP_F7_IRQ
+
+/* GPP_E16 is EC_SCI_L. GPP_E group is routed to DW2 in the GPE0 block */
+#define EC_SCI_GPI		GPE0_DW2_16
+#define EC_SMI_GPI		GPP_E15
+
+/* Power rail control signals. */
+#define EN_PP3300_DX_DIG	GPP_C11
+#define EN_PP3300_DX_TOUCH	GPP_C22
+#define EN_PP3300_DX_EMMC	GPP_D5
+#define EN_PP1800_DX_EMMC	GPP_D6
+#define EN_PP3300_DX_CAM	GPP_D12
+
+/* SD controller needs additional card detect GPIO to support RTD3 */
+#define GPIO_SD_CARD_DETECT	GPP_A7
+
+#ifndef __ACPI__
+/* Pad configuration in ramstage. */
+static const struct pad_config gpio_table[] = {
+/* RCIN# */		PAD_CFG_NF(GPP_A0, NONE, DEEP, NF1),
+/* LAD0 */		PAD_CFG_NF(GPP_A1, 20K_PU, DEEP, NF1),
+/* LAD1 */		PAD_CFG_NF(GPP_A2, 20K_PU, DEEP, NF1),
+/* LAD2 */		PAD_CFG_NF(GPP_A3, 20K_PU, DEEP, NF1),
+/* LAD3 */		PAD_CFG_NF(GPP_A4, 20K_PU, DEEP, NF1),
+/* LFRAME# */		PAD_CFG_NF(GPP_A5, NONE, DEEP, NF1),
+/* SERIRQ */		PAD_CFG_NF(GPP_A6, NONE, DEEP, NF1),
+/* PIRQA# */		PAD_CFG_GPI_GPIO_DRIVER(GPP_A7, 20K_PU, DEEP), /* SD_CD_INT_L */
+/* CLKRUN# */		PAD_CFG_NF(GPP_A8, NONE, DEEP, NF1),
+/* CLKOUT_LPC0 */	PAD_CFG_NF(GPP_A9, NONE, DEEP, NF1),
+/* CLKOUT_LPC1 */	PAD_CFG_NC(GPP_A10),
+/* PME# */		PAD_CFG_NC(GPP_A11),
+/* BM_BUSY# */		PAD_CFG_NC(GPP_A12),
+/* SUSWARN# */		PAD_CFG_NF(GPP_A13, NONE, DEEP, NF1),
+/* SUS_STAT# */		PAD_CFG_NF(GPP_A14, NONE, DEEP, NF1),
+/* SUSACK# */		PAD_CFG_NF(GPP_A15, NONE, DEEP, NF1),
+/* SD_1P8_SEL */	PAD_CFG_NF(GPP_A16, NONE, DEEP, NF1),
+/* SD_PWR_EN# */	PAD_CFG_NF(GPP_A17, NONE, DEEP, NF1),
+/* ISH_GP0 */		PAD_CFG_NC(GPP_A18),
+/* ISH_GP1 */		PAD_CFG_NC(GPP_A19),
+/* ISH_GP2 */		PAD_CFG_NC(GPP_A20),
+/* ISH_GP3 */		PAD_CFG_NC(GPP_A21),
+/* ISH_GP4 */		PAD_CFG_NC(GPP_A22),
+/* ISH_GP5 */		PAD_CFG_NC(GPP_A23),
+/* CORE_VID0 */		PAD_CFG_NC(GPP_B0),
+/* CORE_VID1 */		PAD_CFG_NC(GPP_B1),
+/* VRALERT# */		PAD_CFG_NC(GPP_B2),
+/* CPU_GP2 */		PAD_CFG_GPI_APIC(GPP_B3, NONE, PLTRST), /* TOUCHPAD */
+/* CPU_GP3 */		PAD_CFG_NC(GPP_B4),
+/* SRCCLKREQ0# */	PAD_CFG_GPI_ACPI_SCI(GPP_B5, NONE, DEEP, YES), /* TOUCHPAD WAKE */
+/* SRCCLKREQ1# */	PAD_CFG_NF(GPP_B6, NONE, DEEP, NF1), /* WLAN */
+/* SRCCLKREQ2# */	PAD_CFG_NC(GPP_B7),
+/* SRCCLKREQ3# */	PAD_CFG_NC(GPP_B8),
+/* SRCCLKREQ4# */	PAD_CFG_NC(GPP_B9),
+/* SRCCLKREQ5# */	PAD_CFG_NC(GPP_B10),
+/* EXT_PWR_GATE# */	PAD_CFG_NC(GPP_B11),
+/* SLP_S0# */		PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
+/* PLTRST# */		PAD_CFG_NF(GPP_B13, NONE, DEEP, NF1),
+/* SPKR */		PAD_CFG_NC(GPP_B14),
+/* GSPI0_CS# */		PAD_CFG_GPI_ACPI_SCI(GPP_B15, NONE, DEEP, NONE), /* DIG EJECT */
+/* GSPI0_CLK */		PAD_CFG_GPI_ACPI_SCI(GPP_B16, NONE, DEEP, YES), /* WLAN WAKE */
+/* GSPI0_MISO */	PAD_CFG_NC(GPP_B17),
+/* GSPI0_MOSI */	PAD_CFG_NC(GPP_B18),
+/* GSPI1_CS# */		PAD_CFG_GPI_GPIO_DRIVER(GPP_B19, NONE, DEEP), /* non-wake DIG EJECT */
+/* GSPI1_CLK */		PAD_CFG_NC(GPP_B20),
+/* GSPI1_MISO */	PAD_CFG_NC(GPP_B21),
+/* GSPI1_MOSI */	PAD_CFG_NC(GPP_B22),
+/* SM1ALERT# */		PAD_CFG_NC(GPP_B23),
+/* SMBCLK */		PAD_CFG_NF(GPP_C0, NONE, DEEP, NF1), /* XDP */
+/* SMBDATA */		PAD_CFG_NF(GPP_C1, NONE, DEEP, NF1), /* XDP */
+/* SMBALERT# */		PAD_CFG_NC(GPP_C2),
+/* SML0CLK */		PAD_CFG_NC(GPP_C3),
+/* SML0DATA */		PAD_CFG_NC(GPP_C4),
+/* SML0ALERT# */	PAD_CFG_NC(GPP_C5),
+/* SM1CLK */		PAD_CFG_GPI_GPIO_DRIVER(GPP_C6, 20K_PU, DEEP), /* EC_IN_RW */
+/* SM1DATA */		PAD_CFG_NC(GPP_C7),
+/* UART0_RXD */		PAD_CFG_NC(GPP_C8),
+/* UART0_TXD */		PAD_CFG_NC(GPP_C9),
+/* UART0_RTS# */	PAD_CFG_NC(GPP_C10),
+/* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 1, DEEP), /* EN_PP3300_DX_DIG */
+/* UART1_RXD */		PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, NONE, DEEP), /* MEM_CONFIG[0] */
+/* UART1_TXD */		PAD_CFG_GPI_GPIO_DRIVER(GPP_C13, NONE, DEEP), /* MEM_CONFIG[1] */
+/* UART1_RTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C14, NONE, DEEP), /* MEM_CONFIG[2] */
+/* UART1_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C15, NONE, DEEP), /* MEM_CONFIG[3] */
+/* I2C0_SDA */		PAD_CFG_NF(GPP_C16, NONE, DEEP, NF1), /* TOUCHSCREEN */
+/* I2C0_SCL */		PAD_CFG_NF(GPP_C17, NONE, DEEP, NF1), /* TOUCHSCREEN */
+/* I2C1_SDA */		PAD_CFG_NF(GPP_C18, NONE, DEEP, NF1), /* TOUCHPAD */
+/* I2C1_SCL */		PAD_CFG_NF(GPP_C19, NONE, DEEP, NF1), /* TOUCHPAD */
+/* UART2_RXD */		PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1), /* SERVO */
+/* UART2_TXD */		PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), /* SERVO */
+/* UART2_RTS# */	PAD_CFG_GPO(GPP_C22, 1, DEEP), /* EN_PP3300_DX_TOUCH */
+/* UART2_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, 20K_PU, DEEP), /* PCH_WP */
+/* SPI1_CS# */		PAD_CFG_NC(GPP_D0),
+/* SPI1_CLK */		PAD_CFG_NC(GPP_D1),
+/* SPI1_MISO */		PAD_CFG_NC(GPP_D2),
+/* SPI1_MOSI */		PAD_CFG_NC(GPP_D3),
+/* FASHTRIG */		PAD_CFG_NC(GPP_D4),
+/* ISH_I2C0_SDA */	PAD_CFG_GPO(GPP_D5, 1, DEEP), /* EN_PP3300_DX_EMMC */
+/* ISH_I2C0_SCL */	PAD_CFG_GPO(GPP_D6, 1, DEEP), /* EN_PP1800_DX_EMMC */
+/* ISH_I2C1_SDA */	PAD_CFG_NC(GPP_D7),
+/* ISH_I2C1_SCL */	PAD_CFG_NC(GPP_D8),
+/* ISH_SPI_CS# */	PAD_CFG_NC(GPP_D9),
+/* ISH_SPI_CLK */	PAD_CFG_NC(GPP_D10),
+/* ISH_SPI_MISO */	PAD_CFG_NC(GPP_D11),
+/* ISH_SPI_MOSI */	PAD_CFG_GPO(GPP_D12, 1, DEEP), /* EN_PP3300_DX_CAM */
+/* ISH_UART0_RXD */	PAD_CFG_NC(GPP_D13),
+/* ISH_UART0_TXD */	PAD_CFG_NC(GPP_D14),
+/* ISH_UART0_RTS# */	PAD_CFG_NC(GPP_D15),
+/* ISH_UART0_CTS# */	PAD_CFG_NC(GPP_D16),
+/* DMIC_CLK1 */		PAD_CFG_NC(GPP_D17),
+/* DMIC_DATA1 */	PAD_CFG_NC(GPP_D18),
+/* DMIC_CLK0 */		PAD_CFG_NF(GPP_D19, NONE, DEEP, NF1),
+/* DMIC_DATA0 */	PAD_CFG_NF(GPP_D20, NONE, DEEP, NF1),
+/* TS_SPI1_IO2 */	PAD_CFG_NC(GPP_D21),
+/* TS_SPI1_IO3 */	PAD_CFG_GPO(GPP_D22, 1, DEEP), /* I2S2 BUFFER */
+/* I2S_MCLK */		PAD_CFG_NF(GPP_D23, NONE, DEEP, NF1),
+/* SATAXPCI0 */		PAD_CFG_GPI_APIC(GPP_E0, NONE, PLTRST), /* TPM_PIRQ_L */
+/* SATAXPCIE1 */	PAD_CFG_NC(GPP_E1),
+/* SATAXPCIE2 */	PAD_CFG_NC(GPP_E2),
+/* CPU_GP0 */		PAD_CFG_NC(GPP_E3),
+/* SATA_DEVSLP0 */	PAD_CFG_NC(GPP_E4),
+/* SATA_DEVSLP1 */	PAD_CFG_NC(GPP_E5),
+/* SATA_DEVSLP2 */	PAD_CFG_NC(GPP_E6),
+/* CPU_GP1 */		PAD_CFG_GPI_APIC(GPP_E7, NONE, PLTRST), /* TOUCHSCREEN */
+/* SATALED# */		PAD_CFG_NC(GPP_E8),
+/* USB2_OCO# */		PAD_CFG_NC(GPP_E9),
+/* USB2_OC1# */		PAD_CFG_NC(GPP_E10),
+/* USB2_OC2# */		PAD_CFG_NF(GPP_E11, NONE, DEEP, NF1),
+/* USB2_OC3# */		PAD_CFG_NF(GPP_E12, NONE, DEEP, NF1),
+/* DDPB_HPD0 */		PAD_CFG_NF(GPP_E13, NONE, DEEP, NF1),
+/* DDPC_HPD1 */		PAD_CFG_NF(GPP_E14, NONE, DEEP, NF1),
+/* DDPD_HPD2 */		PAD_CFG_GPI_ACPI_SMI(GPP_E15, NONE, DEEP, YES), /* EC_SMI_L */
+/* DDPE_HPD3 */		PAD_CFG_GPI_ACPI_SCI(GPP_E16, NONE, DEEP, YES), /* EC_SCI_L */
+/* EDP_HPD */		PAD_CFG_NF(GPP_E17, NONE, DEEP, NF1),
+/* DDPB_CTRLCLK */	PAD_CFG_NC(GPP_E18),
+/* DDPB_CTRLDATA */	PAD_CFG_NC(GPP_E19),
+/* DDPC_CTRLCLK */	PAD_CFG_NC(GPP_E20),
+/* DDPC_CTRLDATA */	PAD_CFG_NC(GPP_E21),
+/* DDPD_CTRLCLK */	PAD_CFG_NC(GPP_E22),
+/* DDPD_CTRLDATA */	PAD_CFG_NC(GPP_E23),
+/*
+ * The next 4 pads are for bit banging the amplifiers. They are connected
+ * together with i2s0 signals. For default behavior of i2s make these
+ * gpio inupts.
+ */
+/* I2S2_SCLK */		PAD_CFG_GPI_GPIO_DRIVER(GPP_F0, NONE, DEEP),
+/* I2S2_SFRM */		PAD_CFG_GPI_GPIO_DRIVER(GPP_F1, NONE, DEEP),
+/* I2S2_TXD */		PAD_CFG_GPI_GPIO_DRIVER(GPP_F2, NONE, DEEP),
+/* I2S2_RXD */		PAD_CFG_GPI_GPIO_DRIVER(GPP_F3, NONE, DEEP),
+/* I2C2_SDA */		PAD_CFG_NF(GPP_F4, NONE, DEEP, NF1), /* DIG */
+/* I2C2_SCL */		PAD_CFG_NF(GPP_F5, NONE, DEEP, NF1), /* DIG */
+/* I2C3_SDA */		PAD_CFG_NC(GPP_F6),
+/* I2C3_SCL */		PAD_CFG_GPI_APIC(GPP_F7, NONE, PLTRST), /* DIG_PDCT_L */
+/* I2C4_SDA */		PAD_CFG_NF(GPP_F8, NONE, DEEP, NF1), /* Amplifiers */
+/* I2C4_SCL */		PAD_CFG_NF(GPP_F9, NONE, DEEP, NF1), /* Amplifiers */
+/* I2C5_SDA */		PAD_CFG_GPI_APIC(GPP_F10, NONE, PLTRST), /* MIC_INT_L */
+/* I2C5_SCL */		PAD_CFG_GPI_APIC(GPP_F11, NONE, PLTRST), /* DIG_IRQ_L */
+/* EMMC_CMD */		PAD_CFG_NF(GPP_F12, NONE, DEEP, NF1),
+/* EMMC_DATA0 */	PAD_CFG_NF(GPP_F13, NONE, DEEP, NF1),
+/* EMMC_DATA1 */	PAD_CFG_NF(GPP_F14, NONE, DEEP, NF1),
+/* EMMC_DATA2 */	PAD_CFG_NF(GPP_F15, NONE, DEEP, NF1),
+/* EMMC_DATA3 */	PAD_CFG_NF(GPP_F16, NONE, DEEP, NF1),
+/* EMMC_DATA4 */	PAD_CFG_NF(GPP_F17, NONE, DEEP, NF1),
+/* EMMC_DATA5 */	PAD_CFG_NF(GPP_F18, NONE, DEEP, NF1),
+/* EMMC_DATA6 */	PAD_CFG_NF(GPP_F19, NONE, DEEP, NF1),
+/* EMMC_DATA7 */	PAD_CFG_NF(GPP_F20, NONE, DEEP, NF1),
+/* EMMC_RCLK */		PAD_CFG_NF(GPP_F21, NONE, DEEP, NF1),
+/* EMMC_CLK */		PAD_CFG_NF(GPP_F22, NONE, DEEP, NF1),
+/* RSVD */		PAD_CFG_NC(GPP_F23),
+/* SD_CMD */		PAD_CFG_NF(GPP_G0, NONE, DEEP, NF1),
+/* SD_DATA0 */		PAD_CFG_NF(GPP_G1, NONE, DEEP, NF1),
+/* SD_DATA1 */		PAD_CFG_NF(GPP_G2, NONE, DEEP, NF1),
+/* SD_DATA2 */		PAD_CFG_NF(GPP_G3, NONE, DEEP, NF1),
+/* SD_DATA3 */		PAD_CFG_NF(GPP_G4, NONE, DEEP, NF1),
+/* SD_CD# */		PAD_CFG_NF(GPP_G5, NONE, DEEP, NF1),
+/* SD_CLK */		PAD_CFG_NF(GPP_G6, NONE, DEEP, NF1),
+/*
+ * SD write protect is not connected but is still sampled, so enable
+ * native function and enable internal pull-down to disable.
+ */
+/* SD_WP */		PAD_CFG_NF(GPP_G7, 20K_PD, DEEP, NF1),
+/* BATLOW# */		PAD_CFG_NF(GPD0, NONE, DEEP, NF1),
+/* ACPRESENT */		PAD_CFG_NF(GPD1, NONE, DEEP, NF1),
+/* LAN_WAKE# */		PAD_CFG_NF(GPD2, NONE, DEEP, NF1), /* EC_PCH_WAKE_L */
+/* PWRBTN# */		PAD_CFG_NF(GPD3, NONE, DEEP, NF1),
+/* SLP_S3# */		PAD_CFG_NF(GPD4, NONE, DEEP, NF1),
+/* SLP_S4# */		PAD_CFG_NF(GPD5, NONE, DEEP, NF1),
+/* SLP_A# */		PAD_CFG_NF(GPD6, NONE, DEEP, NF1),
+/* RSVD */		PAD_CFG_NC(GPD7),
+/* SUSCLK */		PAD_CFG_NF(GPD8, NONE, DEEP, NF1),
+/* SLP_WLAN# */		PAD_CFG_NC(GPD9),
+/* SLP_S5# */		PAD_CFG_NC(GPD10),
+/* LANPHYC */		PAD_CFG_NC(GPD11),
+};
+
+/* Early pad configuration in romstage. */
+static const struct pad_config early_gpio_table[] = {
+/* UART2_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, 20K_PU, DEEP), /* PCH_WP */
+};
+
+#endif
+
+#endif
diff --git a/src/mainboard/google/glados/variants/caroline/variant.c b/src/mainboard/google/glados/variants/caroline/variant.c
new file mode 100644
index 0000000000..a00eacf0ed
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/variant.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ * Copyright (C) 2016 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <baseboard/variant.h>
+#include <gpio.h>
+#include <stdint.h>
+#include <string.h>
+#include <soc/pei_data.h>
+#include <soc/pei_wrapper.h>
+#include <variant/gpio.h>
+
+void mainboard_fill_pei_data(struct pei_data *pei_data)
+{
+	/* DQ byte map */
+	const u8 dq_map[2][12] = {
+		  { 0x0F, 0xF0, 0x00, 0xF0, 0x0F, 0xF0,
+		    0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 },
+		  { 0x33, 0xCC, 0x00, 0xCC, 0x33, 0xCC,
+		    0x33, 0x00, 0xFF, 0x00, 0xFF, 0x00 } };
+	/* DQS CPU<>DRAM map */
+	const u8 dqs_map[2][8] = {
+		{ 0, 1, 3, 2, 4, 5, 6, 7 },
+		{ 1, 0, 4, 5, 2, 3, 6, 7 } };
+
+	/* Rcomp resistor */
+	const u16 RcompResistor[3] = { 200, 81, 162 };
+
+	/* Rcomp target */
+	const u16 RcompTarget[5] = { 100, 40, 40, 23, 40 };
+
+	memcpy(pei_data->dq_map, dq_map, sizeof(dq_map));
+	memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map));
+	memcpy(pei_data->RcompResistor, RcompResistor,
+		 sizeof(RcompResistor));
+	memcpy(pei_data->RcompTarget, RcompTarget,
+		 sizeof(RcompTarget));
+}
+
+void mainboard_gpio_smi_sleep(void)
+{
+	int i;
+
+	/* Power down the rails on any sleep type. */
+	gpio_t active_high_signals[] = {
+		EN_PP3300_DX_DIG,
+		EN_PP3300_DX_TOUCH,
+		EN_PP3300_DX_EMMC,
+		EN_PP1800_DX_EMMC,
+		EN_PP3300_DX_CAM,
+	};
+
+	for (i = 0; i < ARRAY_SIZE(active_high_signals); i++)
+		gpio_set(active_high_signals[i], 0);
+}