google/sentry: Add as a variant of glados

Add google/sentry (Lenovo Thinkpad 13 Chromebook) as a variant of
glados Skylake reference board:
- add sentry-specific DPTF, EC config, GPIO config, Kconfig,
    NHLT config, PEI data, VBT, SPD data, and devicetree
- add sentry-specific GPIO determination of which audio codec
    is present

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

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

Change-Id: I783422aedac8b7fc52098eebd05b2061a1011b60
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/27418
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Youness Alaoui <snifikino@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

15 files changed, 907 insertions, 2 deletions

diff --git a/src/mainboard/google/glados/Kconfig b/src/mainboard/google/glados/Kconfig
index 99e538f5df..8ff5472541 100644
--- a/src/mainboard/google/glados/Kconfig
+++ b/src/mainboard/google/glados/Kconfig
@@ -39,6 +39,7 @@ config MAINBOARD_PART_NUMBER
 	default "Chell" if BOARD_GOOGLE_CHELL
 	default "Glados" if BOARD_GOOGLE_GLADOS
 	default "Lars" if BOARD_GOOGLE_LARS
+	default "Sentry" if BOARD_GOOGLE_SENTRY
 
 config MAINBOARD_FAMILY
 	string
@@ -49,12 +50,14 @@ config VARIANT_DIR
 	default "chell" if BOARD_GOOGLE_CHELL
 	default "glados" if BOARD_GOOGLE_GLADOS
 	default "lars" if BOARD_GOOGLE_LARS
+	default "sentry" if BOARD_GOOGLE_SENTRY
 
 config DEVICETREE
 	string
 	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
+	default "variants/sentry/devicetree.cb" if BOARD_GOOGLE_SENTRY
 
 config MAX_CPUS
 	int
@@ -87,4 +90,5 @@ config GBB_HWID
 	default "CHELL TEST 6297" if BOARD_GOOGLE_CHELL
 	default "GLADOS TEST 1988" if BOARD_GOOGLE_GLADOS
 	default "LARS TEST 5001" if BOARD_GOOGLE_LARS
+	default "SENTRY TEST 6297" if BOARD_GOOGLE_SENTRY
 endif
diff --git a/src/mainboard/google/glados/Kconfig.name b/src/mainboard/google/glados/Kconfig.name
index 074d9c35d6..6ad8b191c2 100644
--- a/src/mainboard/google/glados/Kconfig.name
+++ b/src/mainboard/google/glados/Kconfig.name
@@ -17,3 +17,11 @@ config BOARD_GOOGLE_LARS
 	select DRIVERS_GENERIC_MAX98357A
 	select EXCLUDE_NATIVE_SD_INTERFACE
 	select NHLT_MAX98357 if INCLUDE_NHLT_BLOBS
+
+config BOARD_GOOGLE_SENTRY
+	bool "->  Sentry (Lenovo Thinkpad 13 Chromebook)"
+	select BOARD_GOOGLE_BASEBOARD_GLADOS
+	select DRIVERS_GENERIC_MAX98357A
+	select NHLT_DMIC_4CH if INCLUDE_NHLT_BLOBS
+	select NHLT_MAX98357 if INCLUDE_NHLT_BLOBS
+	select NHLT_SSM4567 if INCLUDE_NHLT_BLOBS
diff --git a/src/mainboard/google/glados/mainboard.c b/src/mainboard/google/glados/mainboard.c
index 451b3d4336..476bcf7001 100644
--- a/src/mainboard/google/glados/mainboard.c
+++ b/src/mainboard/google/glados/mainboard.c
@@ -19,8 +19,10 @@
 #include <baseboard/variant.h>
 #include <console/console.h>
 #include <device/device.h>
+#include <gpio.h>
 #include <stdlib.h>
 #include <soc/nhlt.h>
+#include <variant/gpio.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 #include "ec.h"
 
@@ -32,6 +34,24 @@ static void mainboard_init(struct device *dev)
 	mainboard_ec_init();
 }
 
+static uint8_t adi_codec_enable(void)
+{
+#ifdef AUDIO_DB_ID
+	return gpio_get(AUDIO_DB_ID);
+#else
+	return 1;
+#endif
+}
+
+static uint8_t max_codec_enable(void)
+{
+#ifdef AUDIO_DB_ID
+	return gpio_get(AUDIO_DB_ID) ? 0 : 1;
+#else
+	return 1;
+#endif
+}
+
 static unsigned long mainboard_write_acpi_tables(
 	struct device *device, unsigned long current, acpi_rsdp_t *rsdp)
 {
@@ -58,12 +78,12 @@ static unsigned long mainboard_write_acpi_tables(
 			printk(BIOS_ERR, "Couldn't add 4CH DMIC arrays.\n");
 
 	/* ADI Smart Amps for left and right. */
-	if (IS_ENABLED(CONFIG_NHLT_SSM4567))
+	if (IS_ENABLED(CONFIG_NHLT_SSM4567) && adi_codec_enable())
 		if (nhlt_soc_add_ssm4567(nhlt, AUDIO_LINK_SSP0))
 			printk(BIOS_ERR, "Couldn't add ssm4567.\n");
 
 	/* MAXIM Smart Amps for left and right. */
-	if (IS_ENABLED(CONFIG_NHLT_MAX98357)) {
+	if (IS_ENABLED(CONFIG_NHLT_MAX98357) && max_codec_enable()) {
 		if (nhlt_soc_add_max98357(nhlt, AUDIO_LINK_SSP0))
 			printk(BIOS_ERR, "Couldn't add max98357.\n");
 
diff --git a/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNN8GTMLAR-NUD.spd.hex b/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNN8GTMLAR-NUD.spd.hex
new file mode 100644
index 0000000000..b5db37cb2e
--- /dev/null
+++ b/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNN8GTMLAR-NUD.spd.hex
@@ -0,0 +1,16 @@
+91 20 F1 03 05 19 05 03 03 11 01 08 09 00 40 05
+78 78 90 50 90 11 50 E0 90 06 3C 3C 01 90 00 00
+00 00 CA FA 00 00 00 A8 00 08 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 AD 01 00 00 00 00 00 00 00 00
+48 39 43 43 4E 4E 4E 38 47 54 4D 4C 41 52 2D 4E
+55 44 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 00 00 00 00
diff --git a/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNNBJTMLAR-NUD.spd.hex b/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNNBJTMLAR-NUD.spd.hex
new file mode 100644
index 0000000000..c9239c3e61
--- /dev/null
+++ b/src/mainboard/google/glados/spd/hynix_dimm_H9CCNNNBJTMLAR-NUD.spd.hex
@@ -0,0 +1,16 @@
+91 20 F1 03 05 19 05 0B 03 11 01 08 09 00 40 05
+78 78 90 50 90 11 50 E0 90 06 3C 3C 01 90 00 00
+00 00 CA FA 00 00 00 A8 00 08 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 AD 01 00 00 00 00 00 00 00 00
+48 39 43 43 4E 4E 4E 42 4A 54 4D 4C 41 52 2D 4E
+55 44 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 00 00 00 00
diff --git a/src/mainboard/google/glados/spd/samsung_dimm_K4E8E304EE-EGCE.spd.hex b/src/mainboard/google/glados/spd/samsung_dimm_K4E8E304EE-EGCE.spd.hex
new file mode 100644
index 0000000000..52910465c9
--- /dev/null
+++ b/src/mainboard/google/glados/spd/samsung_dimm_K4E8E304EE-EGCE.spd.hex
@@ -0,0 +1,16 @@
+91 20 F1 03 04 11 05 0B 03 11 01 08 0A 00 50 01
+78 78 90 50 90 11 50 E0 10 04 3C 3C 01 90 00 00
+00 00 00 00 00 00 00 A8 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 55 00 00 00 00 00
+20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
+20 20 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 00 00 00 00
diff --git a/src/mainboard/google/glados/variants/sentry/Makefile.inc b/src/mainboard/google/glados/variants/sentry/Makefile.inc
new file mode 100644
index 0000000000..0ebf605ea0
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/Makefile.inc
@@ -0,0 +1,52 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2014 Google Inc.
+## Copyright (C) 2015 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
+
+SPD_BIN = $(obj)/spd.bin
+
+SPD_SOURCES  = hynix_dimm_H9CCNNN8GTMLAR-NUD    	# 0b0000 Dual Channel 4GB
+SPD_SOURCES += micron_dimm_MT52L256M32D1PF-107-1G-1866	# 0b0001 Dual Channel 4GB
+SPD_SOURCES += samsung_dimm_K4E8E304EE-EGCF     	# 0b0010 Dual Channel 4GB
+SPD_SOURCES += samsung_dimm_K4E6E304EB-EGCF     	# 0b0011 Dual Channel 8GB
+SPD_SOURCES += micron_dimm_MT52L512M32D2PF-107-2G-1866	# 0b0100 Dual Channel 8GB
+SPD_SOURCES += samsung_dimm_K4E8E324EB-EGCF        	# 0b0101 Dual Channel 8GB
+SPD_SOURCES += hynix_dimm_H9CCNNNBJTMLAR-NUD    	# 0b0110 Dual Channel 4GB
+SPD_SOURCES += hynix_dimm_H9CCNNNBLTBLAR-NUD-2G-1866    # 0b0111 Dual Channel 8GB
+SPD_SOURCES += empty                                    # 0b1000
+SPD_SOURCES += empty                                    # 0b1001
+SPD_SOURCES += empty                                    # 0b1010
+SPD_SOURCES += empty                                    # 0b1011
+SPD_SOURCES += empty                                    # 0b1100
+SPD_SOURCES += empty                                    # 0b1101
+SPD_SOURCES += empty                                    # 0b1110
+SPD_SOURCES += empty                                    # 0b1111
+
+
+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/sentry/board_info.txt b/src/mainboard/google/glados/variants/sentry/board_info.txt
new file mode 100644
index 0000000000..c4e6be585a
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/board_info.txt
@@ -0,0 +1,6 @@
+Vendor name: Google
+Board name: Sentry (Lenova Thinkpad Chromebook 13)
+Category: laptop
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
diff --git a/src/mainboard/google/glados/variants/sentry/data.vbt b/src/mainboard/google/glados/variants/sentry/data.vbt
new file mode 100644
index 0000000000..0aac82c3b1
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/data.vbt
diff --git a/src/mainboard/google/glados/variants/sentry/devicetree.cb b/src/mainboard/google/glados/variants/sentry/devicetree.cb
new file mode 100644
index 0000000000..8af8940e8e
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/devicetree.cb
@@ -0,0 +1,311 @@
+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 "EnableAzalia" = "1"
+	register "DspEnable" = "1"
+	register "IoBufferOwnership" = "3"
+	register "SmbusEnable" = "1"
+	register "ScsEmmcEnabled" = "1"
+	register "ScsEmmcHs400Enabled" = "1"
+	register "ScsSdCardEnabled" = "2"
+	register "InternalGfx" = "1"
+	register "SkipExtGfxScan" = "1"
+	register "Device4Enable" = "1"
+	register "HeciEnabled" = "0"
+	register "SaGv" = "3"
+	register "SerialIrqConfigSirqEnable" = "1"
+	register "PmConfigSlpS3MinAssert" = "2"        # 50ms
+	register "PmConfigSlpS4MinAssert" = "4"        # 4s
+	register "PmConfigSlpSusMinAssert" = "3"       # 4s
+	register "PmConfigSlpAMinAssert" = "3"         # 2s
+	register "PmTimerDisabled" = "1"
+
+	register "pirqa_routing" = "PCH_IRQ11"
+	register "pirqb_routing" = "PCH_IRQ10"
+	register "pirqc_routing" = "PCH_IRQ11"
+	register "pirqd_routing" = "PCH_IRQ11"
+	register "pirqe_routing" = "PCH_IRQ11"
+	register "pirqf_routing" = "PCH_IRQ11"
+	register "pirqg_routing" = "PCH_IRQ11"
+	register "pirqh_routing" = "PCH_IRQ11"
+
+	# 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(7),
+		.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(34),
+		.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(34),
+		.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(35),
+		.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(35),
+		.voltage_limit = 1520,
+	}"
+
+	# Enable Root port 1 and 5.
+	register "PcieRpEnable[0]" = "1"
+	register "PcieRpEnable[4]" = "1"
+	# Enable CLKREQ#
+	register "PcieRpClkReqSupport[0]" = "1"
+	register "PcieRpClkReqSupport[4]" = "1"
+	# RP 1 uses SRCCLKREQ1# while RP 5 uses SRCCLKREQ2#
+	register "PcieRpClkReqNumber[0]" = "1"
+	register "PcieRpClkReqNumber[4]" = "2"
+
+	register "usb2_ports[0]" = "USB2_PORT_TYPE_C(OC0)"	# Type-C Port 1
+	register "usb2_ports[1]" = "USB2_PORT_TYPE_C(OC1)"	# Type-C Port 2
+	register "usb2_ports[2]" = "USB2_PORT_MID(OC_SKIP)"	# Bluetooth
+	register "usb2_ports[4]" = "USB2_PORT_MID(OC2)"		# Type-A Port (card)
+	register "usb2_ports[6]" = "USB2_PORT_FLEX(OC_SKIP)"	# Camera
+	register "usb2_ports[8]" = "USB2_PORT_LONG(OC3)"	# Type-A Port (board)
+
+	register "usb3_ports[0]" = "USB3_PORT_DEFAULT(OC0)" # Type-C Port 1
+	register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC1)" # Type-C Port 2
+	register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC2)" # Type-A Port (card)
+	register "usb3_ports[3]" = "USB3_PORT_DEFAULT(OC3)" # Type-A Port (board)
+
+	register "i2c_voltage[0]" = "I2C_VOLTAGE_3V3"	# I2C0 is 3.3V
+	register "i2c_voltage[4]" = "I2C_VOLTAGE_1V8"	# I2C4 is 1.8V
+
+	# Must leave UART0 enabled or SD/eMMC will not work as PCI
+	register "SerialIoDevMode" = "{
+		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C1]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C2]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C3]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C4]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C5]  = PchSerialIoDisabled,
+		[PchSerialIoIndexSpi0]  = PchSerialIoDisabled,
+		[PchSerialIoIndexSpi1]  = PchSerialIoDisabled,
+		[PchSerialIoIndexUart0] = PchSerialIoPci,
+		[PchSerialIoIndexUart1] = PchSerialIoDisabled,
+		[PchSerialIoIndexUart2] = PchSerialIoSkipInit,
+	}"
+
+	# PL2 override 25W
+	register "tdp_pl2_override" = "25"
+
+	# Send an extra VR mailbox command for the PS4 exit issue
+	register "SendVrMbxCmd" = "2"
+
+	# Use default SD card detect GPIO configuration
+	register "sdcard_cd_gpio_default" = "GPP_A7"
+
+	# 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" = ""RAYD0001""
+				register "desc" = ""Raydium Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_E7_IRQ)"
+				device i2c 39 on end
+			end
+		end # I2C #0
+		device pci 15.1 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_B3_IRQ)"
+				register "wake" = "GPE0_DW0_05"
+				device i2c 15 on end
+			end
+		end # I2C #1
+		device pci 15.2 off 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
+			chip drivers/i2c/nau8825
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_F10_IRQ)"
+				register "jkdet_enable" = "1"
+				register "jkdet_pull_enable" = "1"
+				register "jkdet_pull_up" = "1"
+				register "jkdet_polarity" = "1"      # ActiveLow
+				register "vref_impedance" = "2"      # 125kOhm
+				register "micbias_voltage" = "6"     # 2.754
+				register "sar_threshold_num" = "4"
+				register "sar_threshold[0]" = "0x08"
+				register "sar_threshold[1]" = "0x12"
+				register "sar_threshold[2]" = "0x26"
+				register "sar_threshold[3]" = "0x73"
+				register "sar_hysteresis" = "0"
+				register "sar_voltage" = "6"
+				register "sar_compare_time" = "1"     # 1us
+				register "sar_sampling_time" = "1"    # 4us
+				register "short_key_debounce" = "3"   # 30ms
+				register "jack_insert_debounce" = "7" # 512ms
+				register "jack_eject_debounce" = "0"
+				device i2c 1a on end
+			end
+			chip drivers/i2c/generic
+				register "hid" = ""INT343B""
+				register "desc" = ""SSM4567 Left Speaker Amp""
+				register "uid" = "0"
+				register "device_present_gpio" = "GPP_E3"
+				device i2c 34 on end
+			end
+			chip drivers/i2c/generic
+				register "hid" = ""INT343B""
+				register "desc" = ""SSM4567 Right Speaker Amp""
+				register "uid" = "1"
+				register "device_present_gpio" = "GPP_E3"
+				device i2c 35 on end
+			end
+		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 on  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
+			chip drivers/generic/max98357a
+				register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_E3)"
+				register "device_present_gpio" = "GPP_E3"
+				register "device_present_gpio_invert" = "1"
+				register "sdmode_delay" = "5"
+				device generic 0 on end
+			end
+		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/sentry/include/variant/acpi/dptf.asl b/src/mainboard/google/glados/variants/sentry/include/variant/acpi/dptf.asl
new file mode 100644
index 0000000000..c9913737a2
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/include/variant/acpi/dptf.asl
@@ -0,0 +1,136 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ * Copyright (C) 2015 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	90
+#define DPTF_CPU_CRITICAL	98
+#define DPTF_CPU_ACTIVE_AC0	90
+#define DPTF_CPU_ACTIVE_AC1	77
+
+#define DPTF_TSR0_SENSOR_ID	0
+#define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
+#define DPTF_TSR0_PASSIVE	70
+#define DPTF_TSR0_CRITICAL	75
+#define DPTF_TSR0_ACTIVE_AC0	120
+#define DPTF_TSR0_ACTIVE_AC1	110
+#define DPTF_TSR0_ACTIVE_AC2	47
+#define DPTF_TSR0_ACTIVE_AC3	44
+#define DPTF_TSR0_ACTIVE_AC4	41
+#define DPTF_TSR0_ACTIVE_AC5	38
+#define DPTF_TSR0_ACTIVE_AC6	35
+
+#define DPTF_TSR1_SENSOR_ID	1
+#define DPTF_TSR1_SENSOR_NAME	"TMP432_Power_top"
+#define DPTF_TSR1_PASSIVE	70
+#define DPTF_TSR1_CRITICAL	75
+
+#define DPTF_TSR2_SENSOR_ID	2
+#define DPTF_TSR2_SENSOR_NAME	"TMP432_CPU_bottom"
+#define DPTF_TSR2_PASSIVE	70
+#define DPTF_TSR2_CRITICAL	75
+
+#define DPTF_ENABLE_CHARGER
+#define DPTF_ENABLE_FAN_CONTROL
+
+#undef DPTF_ENABLE_FAN_CONTROL	/*Disable DPTF Active policy*/
+
+/* Charger performance states, board-specific values from charger and EC */
+Name (CHPS, Package () {
+	Package () { 0, 0, 0, 0, 255, 0x6a4, "mA", 0 },	/* 1.7A (MAX) */
+	Package () { 0, 0, 0, 0, 24, 0x600, "mA", 0 },	/* 1.5A */
+	Package () { 0, 0, 0, 0, 16, 0x400, "mA", 0 },	/* 1.0A */
+	Package () { 0, 0, 0, 0, 8, 0x200, "mA", 0 },	/* 0.5A */
+	Package () { 0, 0, 0, 0, 0, 0x000, "mA", 0 },	/* 0.0A */
+})
+
+#ifdef DPTF_ENABLE_FAN_CONTROL
+/* DFPS: Fan Performance States */
+Name (DFPS, Package () {
+	0,	// Revision
+	/*
+	 * TODO : Need to update this Table after characterization.
+	 *	  These are initial reference values.
+	 */
+	/* Control, Trip Point, Speed, NoiseLevel, Power */
+	Package () {100,	0xFFFFFFFF,	4986,	220,	2200},
+	Package () {90,		0xFFFFFFFF,	4804,	180,	1800},
+	Package () {80,		0xFFFFFFFF,	4512,	145,	1450},
+	Package () {70,		0xFFFFFFFF,	4204,	115,	1150},
+	Package () {60,		0xFFFFFFFF,	3838,	90,	900},
+	Package () {50,		0xFFFFFFFF,	3402,	65,	650},
+	Package () {40,		0xFFFFFFFF,	2904,	45,	450},
+	Package () {30,		0xFFFFFFFF,	2337,	30,	300},
+	Package () {20,		0xFFFFFFFF,	1608,	15,	150},
+	Package () {10,		0xFFFFFFFF,	800,	10,	100},
+	Package () {0,		0xFFFFFFFF,	0,	0,	50}
+})
+
+Name (DART, Package () {
+	/* Fan effect on CPU */
+	0,	// Revision
+	Package () {
+		/*
+		 * Source, Target, Weight, AC0, AC1, AC2, AC3, AC4, AC5, AC6,
+		 *	AC7, AC8, AC9
+		 */
+		\_SB.DPTF.TFN1, \_SB.PCI0.B0D4, 100, 100, 81, 0, 0, 0, 0, 0,
+			0, 0, 0
+	},
+	Package () {
+		\_SB.DPTF.TFN1, \_SB.DPTF.TSR0, 100, 100, 81, 68, 56, 48, 40,
+			35, 0, 0, 0
+	}
+})
+#endif
+
+Name (DTRT, Package () {
+	/* CPU Throttle Effect on CPU */
+	Package () { \_SB.PCI0.B0D4, \_SB.PCI0.B0D4, 100, 20, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 0 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR0, 100, 20, 0, 0, 0, 0 },
+
+#ifdef DPTF_ENABLE_CHARGER
+	/* Charger Effect on Temp Sensor 1 */
+	Package () { \_SB.DPTF.TCHG, \_SB.DPTF.TSR1, 200, 600, 0, 0, 0, 0 },
+#endif
+
+	/* CPU Effect on Temp Sensor 1 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR1, 100, 20, 0, 0, 0, 0 },
+
+	/* CPU Effect on Temp Sensor 2 */
+	Package () { \_SB.PCI0.B0D4, \_SB.DPTF.TSR2, 100, 20, 0, 0, 0, 0 },
+})
+
+Name (MPPC, Package ()
+{
+	0x2,		/* Revision */
+	Package () {	/* Power Limit 1 */
+		0,	/* PowerLimitIndex, 0 for Power Limit 1 */
+		1600,	/* PowerLimitMinimum */
+		15000,	/* PowerLimitMaximum */
+		1000,	/* TimeWindowMinimum */
+		1000,	/* TimeWindowMaximum */
+		5000	/* StepSize */
+	},
+	Package () {	/* Power Limit 2 */
+		1,	/* PowerLimitIndex, 1 for Power Limit 2 */
+		18700,	/* PowerLimitMinimum */
+		18700,	/* PowerLimitMaximum */
+		1000,	/* TimeWindowMinimum */
+		1000,	/* TimeWindowMaximum */
+		1000	/* StepSize */
+	}
+})
diff --git a/src/mainboard/google/glados/variants/sentry/include/variant/acpi/mainboard.asl b/src/mainboard/google/glados/variants/sentry/include/variant/acpi/mainboard.asl
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/include/variant/acpi/mainboard.asl
diff --git a/src/mainboard/google/glados/variants/sentry/include/variant/ec.h b/src/mainboard/google/glados/variants/sentry/include/variant/ec.h
new file mode 100644
index 0000000000..f56154bab9
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/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.
+ */
+
+/* Enable EC backed ALS device in ACPI */
+#define EC_ENABLE_ALS_DEVICE
diff --git a/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h b/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h
new file mode 100644
index 0000000000..600a3192c5
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h
@@ -0,0 +1,242 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ * Copyright (C) 2015 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.
+ */
+
+#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
+
+/* 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
+
+/* 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
+
+/*
+ * GPP_E3 is AUDIO_DB_ID.
+ * It is a dual purpose GPIO, used for Audio Daughter
+ * Board Identification & to control the shutdown mode pin
+ * of the Maxim amp.
+ */
+#define AUDIO_DB_ID		GPP_E3
+
+/* 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[] = {
+/* EC_PCH_RCIN */	PAD_CFG_NF(GPP_A0, NONE, DEEP, NF1),
+/* LPC_LAD_0 */		PAD_CFG_NF(GPP_A1, 20K_PU, DEEP, NF1),
+/* LPC_LAD_1 */		PAD_CFG_NF(GPP_A2, 20K_PU, DEEP, NF1),
+/* LPC_LAD_2 */		PAD_CFG_NF(GPP_A3, 20K_PU, DEEP, NF1),
+/* LPC_LAD_3 */		PAD_CFG_NF(GPP_A4, 20K_PU, DEEP, NF1),
+/* LPC_FRAME */		PAD_CFG_NF(GPP_A5, NONE, DEEP, NF1),
+/* LPC_SERIRQ */	PAD_CFG_NF(GPP_A6, NONE, DEEP, NF1),
+/* SD_CD_WAKE */	PAD_CFG_GPI_GPIO_DRIVER(GPP_A7, 20K_PU, DEEP),
+/* LPC_CLKRUN */	PAD_CFG_NF(GPP_A8, NONE, DEEP, NF1),
+/* EC_LPC_CLK */	PAD_CFG_NF(GPP_A9, NONE, DEEP, NF1),
+/* PCH_LPC_CLK */	PAD_CFG_NC(GPP_A10),
+/* EC_HID_INT */	PAD_CFG_NC(GPP_A11),
+/* ISH_KB_PROX_INT */	PAD_CFG_NC(GPP_A12),
+/* PCH_SUSPWRACB */	PAD_CFG_NF(GPP_A13, NONE, DEEP, NF1),
+/* PM_SUS_STAT */	PAD_CFG_NC(GPP_A14),
+/* PCH_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),
+/* ACCEL INTERRUPT */	PAD_CFG_NC(GPP_A18),
+/* ISH_GP1 */		PAD_CFG_NC(GPP_A19),
+/* GYRO_DRDY */		PAD_CFG_NC(GPP_A20),
+/* FLIP_ACCEL_INT */	PAD_CFG_NC(GPP_A21),
+/* GYRO_INT */		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),
+/* HSJ_MIC_DET */	PAD_CFG_GPI_GPIO_DRIVER(GPP_B2, NONE, DEEP),
+/* TRACKPAD_INT */	PAD_CFG_GPI_APIC(GPP_B3, NONE, PLTRST),
+/* BT_RF_KILL */	PAD_CFG_NC(GPP_B4),
+/* SRCCLKREQ0# */	PAD_CFG_GPI_ACPI_SCI(GPP_B5, NONE, DEEP, YES),
+/* WIFI_CLK_REQ */	PAD_CFG_NF(GPP_B6, NONE, DEEP, NF1),
+/* KEPLR_CLK_REQ */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1),
+/* AUDIO_INT_WAK */	PAD_CFG_GPI_ACPI_SCI(GPP_B8, NONE, DEEP, YES),
+/* SSD_CLK_REQ */	PAD_CFG_NF(GPP_B9, NONE, DEEP, NF1),
+/* SRCCLKREQ5# */	PAD_CFG_NC(GPP_B10),
+/* MPHY_EXT_PWR_GATE */	PAD_CFG_NC(GPP_B11),
+/* PM_SLP_S0 */		PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
+/* PCH_PLT_RST */	PAD_CFG_NF(GPP_B13, NONE, DEEP, NF1),
+/* PCH_BUZZER */	PAD_CFG_GPI_GPIO_DRIVER(GPP_B14, NONE, DEEP),
+/* GSPI0_CS# */		PAD_CFG_NC(GPP_B15),
+/* WLAN_PCIE_WAKE */	PAD_CFG_GPI_ACPI_SCI(GPP_B16, NONE, DEEP, YES),
+/* SSD_PCIE_WAKE */	PAD_CFG_NC(GPP_B17),
+/* GSPI0_MOSI */	PAD_CFG_NC(GPP_B18),
+/* CCODEC_SPI_CS */	PAD_CFG_NC(GPP_B19),
+/* CODEC_SPI_CLK */	PAD_CFG_NC(GPP_B20),
+/* CODEC_SPI_MISO */	PAD_CFG_NC(GPP_B21),
+/* CODEC_SPI_MOSI */	PAD_CFG_NC(GPP_B22),
+/* SM1ALERT# */		PAD_CFG_NC(GPP_B23),
+/* SMB_CLK */		PAD_CFG_NF(GPP_C0, NONE, DEEP, NF1),
+/* SMB_DATA */		PAD_CFG_NF(GPP_C1, NONE, DEEP, NF1),
+/* SMBALERT# */		PAD_CFG_GPO(GPP_C2, 0, DEEP),
+/* M2_WWAN_PWREN */	PAD_CFG_NC(GPP_C3),
+/* SML0DATA */		PAD_CFG_NC(GPP_C4),
+/* SML0ALERT# */	PAD_CFG_NC(GPP_C5),
+/* EC_IN_RW */		PAD_CFG_GPI_GPIO_DRIVER(GPP_C6, NONE, DEEP),
+/* USB_CTL */		PAD_CFG_NC(GPP_C7),
+/* UART0_RXD */		PAD_CFG_NC(GPP_C8),
+/* UART0_TXD */		PAD_CFG_NC(GPP_C9),
+/* NFC_RST* */		PAD_CFG_NC(GPP_C10),
+/* EN_PP3300_KEPLER */	PAD_CFG_TERM_GPO(GPP_C11, 0, 20K_PD, DEEP),
+/* PCH_MEM_CFG0 */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, NONE, DEEP),
+/* PCH_MEM_CFG1 */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C13, NONE, DEEP),
+/* PCH_MEM_CFG2 */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C14, NONE, DEEP),
+/* PCH_MEM_CFG3 */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C15, NONE, DEEP),
+/* I2C0_SDA */		PAD_CFG_NF(GPP_C16, 5K_PU, DEEP, NF1),
+/* I2C0_SCL */		PAD_CFG_NF(GPP_C17, 5K_PU, DEEP, NF1),
+/* I2C1_SDA */		PAD_CFG_NF(GPP_C18, NONE, DEEP, NF1),
+/* I2C1_SCL */		PAD_CFG_NF(GPP_C19, NONE, DEEP, NF1),
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
+/* TCH_PNL_PWREN */	PAD_CFG_GPO(GPP_C22, 1, DEEP),
+/* SPI_WP_STATUS */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, 20K_PU, DEEP),
+/* ITCH_SPI_CS */	PAD_CFG_NC(GPP_D0),
+/* ITCH_SPI_CLK */	PAD_CFG_NC(GPP_D1),
+/* ITCH_SPI_MISO_1 */	PAD_CFG_NC(GPP_D2),
+/* ITCH_SPI_MISO_0 */	PAD_CFG_NC(GPP_D3),
+/* CAM_FLASH_STROBE */	PAD_CFG_NC(GPP_D4),
+/* EN_PP3300_DX_EMMC */	PAD_CFG_NC(GPP_D5),
+/* EN_PP1800_DX_EMMC */	PAD_CFG_NC(GPP_D6),
+/* SH_I2C1_SDA */	PAD_CFG_NC(GPP_D7),
+/* SH_I2C1_SCL */	PAD_CFG_NC(GPP_D8),
+/* ISH_SPI_CSB */	PAD_CFG_NC(GPP_D9),
+/* USB_A0_ILIM_SEL */	PAD_CFG_GPO(GPP_D10, 0, DEEP),
+/* USB_A1_ILIM_SEL */	PAD_CFG_GPO(GPP_D11, 0, DEEP),
+/* EN_PP3300_DX_CAM */	PAD_CFG_NC(GPP_D12),
+/* EN_PP1800_DX_AUDIO */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_CLK_1 */	PAD_CFG_NF(GPP_D17, NONE, DEEP, NF1),
+/* DMIC_DATA_1 */	PAD_CFG_NF(GPP_D18, NONE, DEEP, NF1),
+/* DMIC_CLK_0 */	PAD_CFG_NF(GPP_D19, NONE, DEEP, NF1),
+/* DMIC_DATA_0 */	PAD_CFG_NF(GPP_D20, NONE, DEEP, NF1),
+/* ITCH_SPI_D2 */	PAD_CFG_NC(GPP_D21),
+/* ITCH_SPI_D3 */	PAD_CFG_NC(GPP_D22),
+/* I2S_MCLK */		PAD_CFG_NF(GPP_D23, NONE, DEEP, NF1),
+/* SPI_TPM_IRQ */	PAD_CFG_GPI_APIC(GPP_E0, NONE, PLTRST),
+/* SATAXPCIE1 */	PAD_CFG_NC(GPP_E1),
+/* SSD_PEDET */		PAD_CFG_NC(GPP_E2),
+/* AUDIO_DB_ID */	PAD_CFG_GPI_GPIO_DRIVER(GPP_E3, NONE, DEEP),
+/* SSD_SATA_DEVSLP */	PAD_CFG_NC(GPP_E4),
+/* SATA_DEVSLP1 */	PAD_CFG_NC(GPP_E5),
+/* SATA_DEVSLP2 */	PAD_CFG_NC(GPP_E6),
+/* TCH_PNL_INTR* */	PAD_CFG_GPI_APIC(GPP_E7, NONE, PLTRST),
+/* SATALED# */		PAD_CFG_NC(GPP_E8),
+/* USB2_OC_0 */		PAD_CFG_NF(GPP_E9, NONE, DEEP, NF1),
+/* USB2_OC_1 */		PAD_CFG_NF(GPP_E10, NONE, DEEP, NF1),
+/* USB2_OC_2 */		PAD_CFG_NF(GPP_E11, NONE, DEEP, NF1),
+/* USB2_OC_3 */		PAD_CFG_NF(GPP_E12, NONE, DEEP, NF1),
+/* DDI1_HPD */		PAD_CFG_NF(GPP_E13, NONE, DEEP, NF1),
+/* DDI2_HPD */		PAD_CFG_NF(GPP_E14, NONE, DEEP, NF1),
+/* EC_SMI */		PAD_CFG_GPI_ACPI_SMI(GPP_E15, NONE, DEEP, YES),
+/* EC_SCI */		PAD_CFG_GPI_ACPI_SCI(GPP_E16, NONE, DEEP, YES),
+/* EDP_HPD */		PAD_CFG_NF(GPP_E17, NONE, DEEP, NF1),
+/* DDPB_CTRLCLK */	PAD_CFG_NC(GPP_E18),
+/* DDPB_CTRLDATA */	PAD_CFG_NF(GPP_E19, NONE, DEEP, NF1),
+/* DDPC_CTRLCLK */	PAD_CFG_NC(GPP_E20),
+/* DDPC_CTRLDATA */	PAD_CFG_NF(GPP_E21, NONE, DEEP, NF1),
+/* DDPD_CTRLCLK */	PAD_CFG_NC(GPP_E22),
+/* TCH_PNL_RST */	PAD_CFG_GPO(GPP_E23, 1, DEEP),
+/* 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_NC(GPP_F4),
+/* I2C2_SCL */		PAD_CFG_NC(GPP_F5),
+/* I2C3_SDA */		PAD_CFG_NC(GPP_F6),
+/* I2C3_SCL */		PAD_CFG_NC(GPP_F7),
+/* I2C4_SDA */		PAD_CFG_NF_1V8(GPP_F8, NONE, DEEP, NF1),
+/* I2C4_SDA */		PAD_CFG_NF_1V8(GPP_F9, NONE, DEEP, NF1),
+/* AUDIO_IRQ */		PAD_CFG_GPI_APIC(GPP_F10, NONE, PLTRST),
+/* AUDIO_IRQ */		PAD_CFG_GPI_ACPI_SCI(GPP_F11, NONE, DEEP, YES),
+/* 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),
+/* BOOT_BEEP */		PAD_CFG_GPO(GPP_F23, 0, DEEP),
+/* 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_WP */             PAD_CFG_NF(GPP_G7, 20K_PU, DEEP, NF1),
+/* PCH_BATLOW */	PAD_CFG_NF(GPD0, NONE, DEEP, NF1),
+/* EC_PCH_ACPRESENT */	PAD_CFG_NF(GPD1, NONE, DEEP, NF1),
+/* EC_PCH_WAKE */	PAD_CFG_NF(GPD2, NONE, DEEP, NF1),
+/* EC_PCH_PWRBTN */	PAD_CFG_NF(GPD3, NONE, DEEP, NF1),
+/* PM_SLP_S3# */	PAD_CFG_NF(GPD4, NONE, DEEP, NF1),
+/* PM_SLP_S4# */	PAD_CFG_NF(GPD5, NONE, DEEP, NF1),
+/* PM_SLP_SA# */	PAD_CFG_NF(GPD6, NONE, DEEP, NF1),
+/* GPD7 */		PAD_CFG_NC(GPD7),
+/* PM_SUSCLK */		PAD_CFG_NF(GPD8, NONE, DEEP, NF1),
+/* PCH_SLP_WLAN# */	PAD_CFG_NC(GPD9),
+/* PM_SLP_S5# */	PAD_CFG_NC(GPD10),
+/* LANPHYC */		PAD_CFG_NC(GPD11),
+};
+
+/* Early pad configuration in romstage. */
+static const struct pad_config early_gpio_table[] = {
+/* SRCCLKREQ2# */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
+/* SPI_WP_STATUS */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, 20K_PU, DEEP),
+/* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
+};
+
+#endif
+
+#endif
diff --git a/src/mainboard/google/glados/variants/sentry/variant.c b/src/mainboard/google/glados/variants/sentry/variant.c
new file mode 100644
index 0000000000..00f49fecf7
--- /dev/null
+++ b/src/mainboard/google/glados/variants/sentry/variant.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ * Copyright (C) 2015 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 <stdint.h>
+#include <string.h>
+#include <baseboard/variant.h>
+#include <soc/pei_data.h>
+#include <soc/pei_wrapper.h>
+
+#define K4E6E304EE_MEM_ID	0x3
+
+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 },
+		  { 0x0F, 0xF0, 0x00, 0xF0, 0x0F, 0xF0,
+		    0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 } };
+	/* DQS CPU<>DRAM map */
+	const u8 dqs_map[2][8] = {
+		{ 0, 1, 3, 2, 6, 5, 4, 7 },
+		{ 2, 3, 0, 1, 6, 7, 4, 5 } };
+
+	/* Rcomp resistor */
+	const u16 RcompResistor[3] = { 200, 81, 162 };
+
+	/* Rcomp target */
+	const u16 RcompTarget[5] = { 100, 40, 40, 23, 40 };
+
+	/* Strengthen the Rcomp Target Ctrl for K4E6E304EE_MEM_ID */
+	const u16 StrengthendRcompTarget[5] = { 100, 40, 40, 21, 40 };
+
+	/* Default Rcomp Target assignment */
+	const u16 *targeted_rcomp = RcompTarget;
+
+	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));
+
+	/* Override Rcomp Target assignment for specific SKU(s) */
+	if (pei_data->mem_cfg_id == K4E6E304EE_MEM_ID)
+		targeted_rcomp = StrengthendRcompTarget;
+
+	memcpy(pei_data->RcompTarget, targeted_rcomp,
+		sizeof(pei_data->RcompTarget));
+}