Change in coreboot[master]: mb/google/volteer: add volteer mainboard initial support - coreboot-gerrit

29 Jan 2020

Nick Vaccaro has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38620 )
Change subject: mb/google/volteer: add volteer mainboard initial support
......................................................................
mb/google/volteer: add volteer mainboard initial support
BUG=b:142961277
BRANCH=master
TEST="emerge-volteer coreboot" compiles successfully.
Change-Id: I03a13f3df4e819ab9cf63ad69867c807d2a1b651
Signed-off-by: Nick Vaccaro nvaccaro@google.com
---
A src/mainboard/google/volteer/Kconfig
A src/mainboard/google/volteer/Kconfig.name
A src/mainboard/google/volteer/Makefile.inc
A src/mainboard/google/volteer/acpi/mipi_camera.asl
A src/mainboard/google/volteer/acpi_tables.c
A src/mainboard/google/volteer/board_info.txt
A src/mainboard/google/volteer/bootblock.c
A src/mainboard/google/volteer/chromeos.c
A src/mainboard/google/volteer/chromeos.fmd
A src/mainboard/google/volteer/dsdt.asl
A src/mainboard/google/volteer/ec.c
A src/mainboard/google/volteer/mainboard.c
A src/mainboard/google/volteer/smihandler.c
A src/mainboard/google/volteer/spd/Makefile.inc
A src/mainboard/google/volteer/spd/samsung-K4U6E3S4AA-MGCL.spd.hex
A src/mainboard/google/volteer/variants/baseboard/Makefile.inc
A src/mainboard/google/volteer/variants/baseboard/devicetree.cb
A src/mainboard/google/volteer/variants/baseboard/gpio.c
A src/mainboard/google/volteer/variants/baseboard/include/baseboard/ec.h
A src/mainboard/google/volteer/variants/baseboard/include/baseboard/gpio.h
A src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h
A src/mainboard/google/volteer/variants/volteer/Makefile.inc
A src/mainboard/google/volteer/variants/volteer/include/variant/acpi/dptf.asl
A src/mainboard/google/volteer/variants/volteer/include/variant/ec.h
A src/mainboard/google/volteer/variants/volteer/include/variant/gpio.h
25 files changed, 2,204 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/20/38620/1

diff --git a/src/mainboard/google/volteer/Kconfig b/src/mainboard/google/volteer/Kconfig
new file mode 100644
index 0000000..572a100
--- /dev/null
+++ b/src/mainboard/google/volteer/Kconfig
@@ -0,0 +1,71 @@
+config BOARD_GOOGLE_BASEBOARD_VOLTEER
+	def_bool n
+	select BOARD_ROMSIZE_KB_32768
+	select DRIVERS_GENERIC_MAX98357A
+	select DRIVERS_I2C_GENERIC
+	select DRIVERS_SPI_ACPI
+	select EC_GOOGLE_CHROMEEC
+	select EC_GOOGLE_CHROMEEC_BOARDID
+	select EC_GOOGLE_CHROMEEC_LPC
+	select HAVE_ACPI_RESUME
+	select HAVE_ACPI_TABLES
+	select INTEL_LPSS_UART_FOR_CONSOLE
+	select MAINBOARD_HAS_CHROMEOS
+	select MAINBOARD_HAS_SPI_TPM_CR50
+	select MAINBOARD_HAS_TPM2
+	select SOC_INTEL_TIGERLAKE
+
+if BOARD_GOOGLE_BASEBOARD_VOLTEER
+
+config CHROMEOS
+	bool
+	default y
+	select EC_GOOGLE_CHROMEEC_SWITCHES
+	select GBB_FLAG_FORCE_DEV_SWITCH_ON
+	select GBB_FLAG_FORCE_DEV_BOOT_USB
+	select GBB_FLAG_FORCE_DEV_BOOT_LEGACY
+	select GBB_FLAG_FORCE_MANUAL_RECOVERY
+	select HAS_RECOVERY_MRC_CACHE
+	select MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN
+	select VBOOT_LID_SWITCH
+
+config DIMM_SPD_SIZE
+	int
+	default 512
+
+config DEVICETREE
+	string
+	default "variants/baseboard/devicetree.cb"
+
+config OVERRIDE_DEVICETREE
+	string
+	default "variants/$(CONFIG_VARIANT_DIR)/overridetree.cb" if !BOARD_GOOGLE_VOLTEER
+
+config DRIVER_TPM_SPI_BUS
+	default 0x1
+
+config MAINBOARD_DIR
+	string
+	default "google/volteer"
+
+config MAINBOARD_FAMILY
+	string
+	default "Google_Volteer" if BOARD_GOOGLE_VOLTEER
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "Volteer" if BOARD_GOOGLE_VOLTEER
+
+config MAX_CPUS
+	int
+	default 8
+
+config TPM_TIS_ACPI_INTERRUPT
+	int
+	default 21  # GPE0_DW0_21 (GPP_C21)
+
+config VARIANT_DIR
+	string
+	default "volteer" if BOARD_GOOGLE_VOLTEER
+
+endif # BOARD_GOOGLE_BASEBOARD_VOLTEER
diff --git a/src/mainboard/google/volteer/Kconfig.name b/src/mainboard/google/volteer/Kconfig.name
new file mode 100644
index 0000000..a3fac9c
--- /dev/null
+++ b/src/mainboard/google/volteer/Kconfig.name
@@ -0,0 +1,5 @@
+comment "Volteer"
+
+config BOARD_GOOGLE_VOLTEER
+	bool "-> Volteer"
+	select BOARD_GOOGLE_BASEBOARD_VOLTEER
diff --git a/src/mainboard/google/volteer/Makefile.inc b/src/mainboard/google/volteer/Makefile.inc
new file mode 100644
index 0000000..34bb41a
--- /dev/null
+++ b/src/mainboard/google/volteer/Makefile.inc
@@ -0,0 +1,35 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright 2019 Google LLC
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+bootblock-y += bootblock.c
+
+romstage-$(CONFIG_CHROMEOS) += chromeos.c
+
+ramstage-$(CONFIG_CHROMEOS) += chromeos.c
+ramstage-y += ec.c
+ramstage-y += mainboard.c
+
+smm-y += smihandler.c
+
+verstage-$(CONFIG_CHROMEOS) += chromeos.c
+
+subdirs-y += variants/baseboard
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include
+
+VARIANT_DIR:=$(call strip_quotes,$(CONFIG_VARIANT_DIR))
+subdirs-y += variants/$(VARIANT_DIR)
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include
+
+subdirs-y += spd
diff --git a/src/mainboard/google/volteer/acpi/mipi_camera.asl b/src/mainboard/google/volteer/acpi/mipi_camera.asl
new file mode 100644
index 0000000..e1ecc3a
--- /dev/null
+++ b/src/mainboard/google/volteer/acpi/mipi_camera.asl
@@ -0,0 +1,530 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 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.
+ */
+
+Scope (_SB.PCI0)
+{
+	Device (IPU0)
+	{
+		Name (_ADR, 0x00050000)
+		Name (_DDN, "Camera and Imaging Subsystem")
+	}
+}
+
+Scope (_SB.PCI0.IPU0)
+{
+	Name (_DSD, Package (0x02)
+	{
+		ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+		Package (0x02)
+		{
+			Package (0x02)
+			{
+				"port0",
+				"PRT0"
+			},
+
+			Package (0x02)
+			{
+				"port1",
+				"PRT1"
+			}
+		}
+	})
+
+	Name (PRT0, Package (0x04)
+	{
+		ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package (0x01)
+		{
+			Package (0x02)
+			{
+				"port",
+				5
+			}
+		},
+
+		ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+		Package (0x01)
+		{
+			Package (0x02)
+			{
+				"endpoint0",
+				"EP00"
+			}
+		}
+	})
+
+	Name (PRT1, Package (0x04)
+	{
+		ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package (0x01)
+		{
+			Package (0x02)
+			{
+				"port",
+				1
+			}
+		},
+
+		ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+		Package (0x01)
+		{
+			Package (0x02)
+			{
+				"endpoint0",
+				"EP10"
+			}
+		}
+	})
+}
+
+Scope (_SB.PCI0.IPU0)
+{
+	Name (EP00, Package (0x02)
+	{
+		ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package (0x04)
+		{
+			Package (0x02)
+			{
+				"endpoint",
+				Zero
+			},
+
+			Package (0x02)
+			{
+				"clock-lanes",
+				Zero
+			},
+
+			Package (0x02)
+			{
+				"data-lanes",
+				Package (0x04)
+				{
+					One,
+					0x02,
+					0x03,
+					0x04
+				}
+			},
+
+			Package (0x02)
+			{
+				"remote-endpoint",
+				Package (0x03)
+				{
+					^I2C3.CAM0,
+					Zero,
+					Zero
+				}
+			}
+		}
+	})
+	Name (EP10, Package (0x02)
+	{
+		ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package (0x04)
+		{
+			Package (0x02)
+			{
+				"endpoint",
+				Zero
+			},
+
+			Package (0x02)
+			{
+				"clock-lanes",
+				Zero
+			},
+
+			Package (0x02)
+			{
+				"data-lanes",
+				Package (0x04)
+				{
+					One,
+					0x02
+				}
+			},
+
+			Package (0x02)
+			{
+				"remote-endpoint",
+				Package (0x03)
+				{
+					^I2C2.CAM1,
+					Zero,
+					Zero
+				}
+			}
+		}
+	})
+}
+
+Scope (_SB.PCI0.I2C3)
+{
+	PowerResource (RCPR, 0x00, 0x0000)
+	{
+		Name (STA, Zero)
+		Method (_ON, 0, Serialized)
+		{
+			If ((STA == Zero))
+			{
+				/* Enable CLK3:19.2MHz  */
+				MCCT(3,1,1)
+				/* Pull PWREN(GPIO H20) high */
+				STXS(GPP_H20)
+				Sleep(5)
+				/* Pull RST(GPIO D4) low */
+				CTXS(GPP_D4)
+				Sleep(5)
+				/* Pull RST high */
+				STXS(GPP_D4)
+				Sleep(5)
+				Store(1,STA)
+			}
+		}
+
+		Method (_OFF, 0, Serialized)
+		{
+			If ((STA == One))
+			{
+				/* Pull RST low */
+				CTXS(GPP_D4)
+				/* Pull PWREN low */
+				CTXS(GPP_H20)
+				/* Disable CLK3 */
+				MCCT(3,0,1)
+				Store(0,STA)
+			}
+		}
+
+		Method (_STA, 0, NotSerialized)
+		{
+			Return (STA)
+		}
+	}
+
+	Device (CAM0)
+	{
+		Name (_HID, "OVTI8856")
+		Name (_UID, Zero)
+		Name (_DDN, "Ov 8856 Camera")
+		Method (_STA, 0, NotSerialized)
+		{
+			Return (0x0F)
+		}
+
+		Name (_CRS, ResourceTemplate ()
+		{
+			I2cSerialBus (0x0010, ControllerInitiated, 0x00061A80,
+				AddressingMode7Bit, "\_SB.PCI0.I2C3",
+				0x00, ResourceConsumer, ,
+			)
+		})
+
+		Name (_PR0, Package (0x01)
+		{
+			RCPR
+		})
+
+		Name (_PR3, Package (0x01)
+		{
+			RCPR
+		})
+
+		Name (_DSD, Package (0x04)
+		{
+			ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"port0",
+					"PRT0"
+				}
+			},
+
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x02)
+			{
+				Package (0x02)
+				{
+					"clock-frequency",
+					0x0124F800
+				},
+				Package (0x02)
+				{
+					"lens-focus",
+					Package (0x01)
+					{
+						VCM0
+					}
+				}
+			}
+		})
+
+		Name (PRT0, Package (0x04)
+		{
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"port",
+					Zero
+				}
+			},
+
+			ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"endpoint0",
+					"EP00"
+				}
+			}
+		})
+
+		Name (EP00, Package (0x02)
+		{
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x03)
+			{
+				Package (0x02)
+				{
+					"endpoint",
+					Zero
+				},
+
+				Package (0x02)
+				{
+					"link-frequencies",
+					Package (0x01)
+					{
+						0x325AA000
+					}
+				},
+				Package (0x02)
+				{
+					"remote-endpoint",
+					Package (0x03)
+					{
+						IPU0,
+						Zero,
+						Zero
+					}
+				}
+			}
+		})
+	}
+
+	Device (VCM0)
+	{
+		Name (_HID, "PRP0001")
+		Name (_UID, 0x03)
+		Name (_DDN, "DW9714 VCM")
+		Method (_STA, 0, NotSerialized)
+		{
+			Return (0x0F)
+		}
+
+		Name (_CRS, ResourceTemplate ()
+		{
+			I2cSerialBus (0x000C, ControllerInitiated, 0x00061A80,
+				AddressingMode7Bit, "\_SB.PCI0.I2C3",
+				0x00, ResourceConsumer, ,
+			)
+		})
+		Name (_DEP, Package (0x01)
+		{
+			CAM0
+		})
+		Name (_PR0, Package (0x01)
+		{
+			RCPR
+		})
+		Name (_PR3, Package (0x01)
+		{
+			RCPR
+		})
+		Name (_DSD, Package (0x02)
+		{
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"compatible",
+					"dongwoon,dw9714"
+				}
+			}
+		})
+	}
+}
+
+Scope (_SB.PCI0.I2C2)
+{
+	PowerResource (FCPR, 0x00, 0x0000)
+	{
+		Name (STA, Zero)
+		Method (_ON, 0, Serialized)
+		{
+			If ((STA == Zero))
+			{
+				/* Enable CLK2 : 19.2MHz */
+				MCCT(2,1,1)
+				/* Pull PWREN(GPIO H20) high */
+				STXS(GPP_H20)
+				Sleep(5)
+				/* Pull RST(GPIO D4) low */
+				CTXS(GPP_D4)
+				Sleep(5)
+				/* Pull RST high */
+				STXS(GPP_D4)
+				Sleep(5)
+				Store(1,STA)
+			}
+		}
+
+		Method (_OFF, 0, Serialized)
+		{
+			If ((STA == One))
+			{
+				/* Pull RST low */
+				CTXS(GPP_D4)
+				/* Pull PWREN low */
+				CTXS(GPP_H20)
+				/* Disable CLK2 */
+				MCCT(2,0,1)
+				Store(0,STA)
+			}
+		}
+
+		Method (_STA, 0, NotSerialized)
+		{
+			Return (STA)
+		}
+	}
+
+	Device (CAM1)
+	{
+		Name (_HID, "OVTI2740")
+		Name (_UID, Zero)
+		Name (_DDN, "Ov 2740 Camera")
+		Method (_STA, 0, NotSerialized)
+		{
+			Return (0x0F)
+		}
+
+		Name (_CRS, ResourceTemplate ()
+		{
+			I2cSerialBus (0x0010, ControllerInitiated, 0x00061A80,
+				AddressingMode7Bit, "\_SB.PCI0.I2C0",
+				0x00, ResourceConsumer, ,
+			)
+		})
+
+		Name (_PR0, Package (0x01)
+		{
+			FCPR
+		})
+
+		Name (_PR3, Package (0x01)
+		{
+			FCPR
+		})
+
+		Name (_DSD, Package (0x04)
+		{
+			ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"port0",
+					"PRT0"
+				}
+			},
+
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"clock-frequency",
+					0x0124F800
+				}
+			}
+		})
+
+		Name (PRT0, Package (0x04)
+		{
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"port",
+					Zero
+				}
+			},
+
+			ToUUID ("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"endpoint0",
+					"EP00"
+				}
+			}
+		})
+
+		Name (EP00, Package (0x02)
+		{
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x03)
+			{
+				Package (0x02)
+				{
+					"endpoint",
+					Zero
+				},
+
+				Package (0x02)
+				{
+					"link-frequencies",
+					Package (0x01)
+					{
+						0x325AA000
+					}
+				},
+				Package (0x02)
+				{
+					"remote-endpoint",
+					Package (0x03)
+					{
+						IPU0,
+						One,
+						Zero
+					}
+				}
+			}
+		})
+	}
+}
diff --git a/src/mainboard/google/volteer/acpi_tables.c b/src/mainboard/google/volteer/acpi_tables.c
new file mode 100644
index 0000000..3b44754
--- /dev/null
+++ b/src/mainboard/google/volteer/acpi_tables.c
@@ -0,0 +1 @@
+/* Nothing here */
diff --git a/src/mainboard/google/volteer/board_info.txt b/src/mainboard/google/volteer/board_info.txt
new file mode 100644
index 0000000..c41a04b
--- /dev/null
+++ b/src/mainboard/google/volteer/board_info.txt
@@ -0,0 +1,6 @@
+Vendor name: Google
+Board name: Volteer Tigerlake Reference Board
+Category: laptop
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
diff --git a/src/mainboard/google/volteer/bootblock.c b/src/mainboard/google/volteer/bootblock.c
new file mode 100644
index 0000000..1127d2e
--- /dev/null
+++ b/src/mainboard/google/volteer/bootblock.c
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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/variants.h>
+#include <bootblock_common.h>
+
+void bootblock_mainboard_init(void)
+{
+	const struct pad_config *pads;
+	size_t num;
+
+	pads = variant_early_gpio_table(&num);
+	gpio_configure_pads(pads, num);
+}
diff --git a/src/mainboard/google/volteer/chromeos.c b/src/mainboard/google/volteer/chromeos.c
new file mode 100644
index 0000000..6cda926
--- /dev/null
+++ b/src/mainboard/google/volteer/chromeos.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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/variants.h>
+#include <boot/coreboot_tables.h>
+#include <gpio.h>
+#include <variant/gpio.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+	struct lb_gpio chromeos_gpios[] = {
+		{-1, ACTIVE_HIGH, get_write_protect_state(), "write protect"},
+		{-1, ACTIVE_HIGH, get_lid_switch(), "lid"},
+		{-1, ACTIVE_HIGH, 0, "power"},
+		{-1, ACTIVE_HIGH, gfx_get_init_done(), "oprom"},
+		{GPIO_EC_IN_RW, ACTIVE_HIGH, gpio_get(GPIO_EC_IN_RW),
+		 "EC in RW"},
+	};
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
+}
+
+int get_write_protect_state(void)
+{
+	/* Read PCH_WP GPIO. */
+	return gpio_get(GPIO_PCH_WP);
+}
+
+void mainboard_chromeos_acpi_generate(void)
+{
+	const struct cros_gpio *gpios;
+	size_t num;
+
+	gpios = variant_cros_gpios(&num);
+	chromeos_acpi_gpio_generate(gpios, num);
+}
diff --git a/src/mainboard/google/volteer/chromeos.fmd b/src/mainboard/google/volteer/chromeos.fmd
new file mode 100644
index 0000000..60ea3de
--- /dev/null
+++ b/src/mainboard/google/volteer/chromeos.fmd
@@ -0,0 +1,47 @@
+FLASH@0xfe000000 0x2000000 {
+	SI_ALL@0x0 0x500000 {
+		SI_DESC@0x0 0x1000
+		SI_ME@0x1000 0x4ff000
+	}
+	SI_BIOS@0x500000 0x1b00000 {
+		# Place RW_LEGACY at the start of BIOS region such that the rest
+		# of BIOS regions start at 16MiB boundary. Since this is a 32MiB
+		# SPI flash only the top 16MiB actually gets memory mapped.
+		RW_LEGACY(CBFS)@0x0 0xf00000
+		RW_SECTION_A@0xf00000 0x3e0000 {
+			VBLOCK_A@0x0 0x10000
+			FW_MAIN_A(CBFS)@0x10000 0x3cffc0
+			RW_FWID_A@0x3dffc0 0x40
+		}
+		RW_SECTION_B@0x12e0000 0x3e0000 {
+			VBLOCK_B@0x0 0x10000
+			FW_MAIN_B(CBFS)@0x10000 0x3cffc0
+			RW_FWID_B@0x3dffc0 0x40
+		}
+		RW_MISC@0x16c0000 0x40000 {
+			UNIFIED_MRC_CACHE(PRESERVE)@0x0 0x30000 {
+				RECOVERY_MRC_CACHE@0x0 0x10000
+				RW_MRC_CACHE@0x10000 0x20000
+			}
+			RW_ELOG(PRESERVE)@0x30000 0x4000
+			RW_SHARED@0x34000 0x4000 {
+				SHARED_DATA@0x0 0x2000
+				VBLOCK_DEV@0x2000 0x2000
+			}
+			RW_VPD(PRESERVE)@0x38000 0x2000
+			RW_NVRAM(PRESERVE)@0x3a000 0x6000
+		}
+		# Make WP_RO region align with SPI vendor
+		# memory protected range specification.
+		WP_RO@0x1700000 0x400000 {
+			RO_VPD(PRESERVE)@0x0 0x4000
+			RO_SECTION@0x4000 0x3fc000 {
+				FMAP@0x0 0x800
+				RO_FRID@0x800 0x40
+				RO_FRID_PAD@0x840 0x7c0
+				GBB@0x1000 0x3000
+				COREBOOT(CBFS)@0x4000 0x3f8000
+			}
+		}
+	}
+}
diff --git a/src/mainboard/google/volteer/dsdt.asl b/src/mainboard/google/volteer/dsdt.asl
new file mode 100644
index 0000000..a7d9e6b
--- /dev/null
+++ b/src/mainboard/google/volteer/dsdt.asl
@@ -0,0 +1,87 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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 <arch/acpi.h>
+#include "variant/ec.h"
+#include "variant/gpio.h"
+
+DefinitionBlock(
+	"dsdt.aml",
+	"DSDT",
+	0x02,		// DSDT revision: ACPI v2.0 and up
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x20110725	// OEM revision
+)
+{
+	// Some generic macros
+	#include <soc/intel/tigerlake/acpi/platform.asl>
+
+	// global NVS and variables
+	#include <soc/intel/common/block/acpi/acpi/globalnvs.asl>
+
+	// CPU
+	#include <cpu/intel/common/acpi/cpu.asl>
+
+	Scope (_SB) {
+		Device (PCI0)
+		{
+			#include <soc/intel/common/block/acpi/acpi/northbridge.asl>
+			#include <soc/intel/tigerlake/acpi/southbridge.asl>
+		}
+	}
+
+	Scope (_SB) {
+		Device (PEPD)
+		{
+			Name (_HID, "INT33A1" /* Intel Power Engine */)  // _HID: Hardware ID
+			Name (_CID, EisaId ("PNP0D80") /* System Power Management Controller */)  // _CID: Compatible ID
+			Name (_UID, One)  // _UID: Unique ID
+			Name (PPD0, Package (0x03)
+			{
+				"\_SB.PC00.SAT0",
+				Zero,
+				Package (0x02)
+				{
+					Zero,
+					Package (0x03)
+					{
+						0xFF,
+						Zero,
+						0x81
+					}
+				}
+			})
+		}
+	}
+
+	// Chrome OS specific
+	#include <vendorcode/google/chromeos/acpi/chromeos.asl>
+
+	// Chrome OS Embedded Controller
+	Scope (_SB.PCI0.LPCB)
+	{
+		// ACPI code for EC SuperIO functions
+		#include <ec/google/chromeec/acpi/superio.asl>
+		// ACPI code for EC functions
+		#include <ec/google/chromeec/acpi/ec.asl>
+	}
+
+	// Chipset specific sleep states
+	#include <southbridge/intel/common/acpi/sleepstates.asl>
+
+       /* MIPI camera */
+       #include "acpi/mipi_camera.asl"
+}
diff --git a/src/mainboard/google/volteer/ec.c b/src/mainboard/google/volteer/ec.c
new file mode 100644
index 0000000..ab5705e
--- /dev/null
+++ b/src/mainboard/google/volteer/ec.c
@@ -0,0 +1,33 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Intel Corp.
+ * Copyright 2019 Google LLC
+ *
+ * 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 <arch/acpi.h>
+#include <ec/ec.h>
+#include <ec/google/chromeec/ec.h>
+#include <variant/ec.h>
+
+void mainboard_ec_init(void)
+{
+	static const struct google_chromeec_event_info info = {
+		.log_events = MAINBOARD_EC_LOG_EVENTS,
+		.sci_events = MAINBOARD_EC_SCI_EVENTS,
+		.s3_wake_events = MAINBOARD_EC_S3_WAKE_EVENTS,
+		.s5_wake_events = MAINBOARD_EC_S5_WAKE_EVENTS,
+		.s0ix_wake_events = MAINBOARD_EC_S0IX_WAKE_EVENTS,
+	};
+
+	google_chromeec_events_init(&info, acpi_is_wakeup_s3());
+}
diff --git a/src/mainboard/google/volteer/mainboard.c b/src/mainboard/google/volteer/mainboard.c
new file mode 100644
index 0000000..7f77bf5
--- /dev/null
+++ b/src/mainboard/google/volteer/mainboard.c
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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 <console/console.h>
+#include <arch/acpi.h>
+#include <baseboard/variants.h>
+#include <device/device.h>
+#include <ec/ec.h>
+#include <ec/google/chromeec/ec.h>
+#include <soc/gpio.h>
+#include <smbios.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+#include <variant/gpio.h>
+
+#define SKU_UNKNOWN		0xFFFFFFFF
+#define SKU_MAX			0x7FFFFFFF
+
+static uint32_t get_board_sku(void)
+{
+	static uint32_t sku_id = SKU_UNKNOWN;
+
+	if (sku_id != SKU_UNKNOWN)
+		return sku_id;
+
+	if (google_chromeec_cbi_get_sku_id(&sku_id))
+		sku_id = SKU_UNKNOWN;
+
+	return sku_id;
+}
+
+const char *smbios_system_sku(void)
+{
+	static char sku_str[14]; /* sku{0..2147483647} */
+	uint32_t sku_id = get_board_sku();
+
+	if ((sku_id == SKU_UNKNOWN) || (sku_id > SKU_MAX)) {
+		printk(BIOS_ERR, "%s: Unexpected SKU ID %u\n",
+			__func__, sku_id);
+		return "";
+	}
+
+	snprintf(sku_str, sizeof(sku_str), "sku%u", sku_id);
+
+	return sku_str;
+}
+
+static void mainboard_init(void *chip_info)
+{
+	const struct pad_config *base_pads;
+	const struct pad_config *override_pads;
+	size_t base_num, override_num;
+
+	base_pads = variant_base_gpio_table(&base_num);
+	override_pads = variant_override_gpio_table(&override_num);
+
+	gpio_configure_pads_with_override(base_pads, base_num,
+		override_pads, override_num);
+
+	mainboard_ec_init();
+}
+
+static void mainboard_enable(struct device *dev)
+{
+	dev->ops->acpi_inject_dsdt_generator = chromeos_dsdt_generator;
+}
+
+struct chip_operations mainboard_ops = {
+	.init = mainboard_init,
+	.enable_dev = mainboard_enable,
+};
diff --git a/src/mainboard/google/volteer/smihandler.c b/src/mainboard/google/volteer/smihandler.c
new file mode 100644
index 0000000..8b82de6
--- /dev/null
+++ b/src/mainboard/google/volteer/smihandler.c
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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 <cpu/x86/smm.h>
+#include <ec/google/chromeec/smm.h>
+#include <intelblocks/smihandler.h>
+#include <variant/ec.h>
+
+void mainboard_smi_espi_handler(void)
+{
+	chromeec_smi_process_events();
+}
+
+void mainboard_smi_sleep(u8 slp_typ)
+{
+	chromeec_smi_sleep(slp_typ, MAINBOARD_EC_S3_WAKE_EVENTS,
+			MAINBOARD_EC_S5_WAKE_EVENTS);
+}
+
+int mainboard_smi_apmc(u8 apmc)
+{
+	chromeec_smi_apmc(apmc, MAINBOARD_EC_SCI_EVENTS,
+			MAINBOARD_EC_SMI_EVENTS);
+	return 0;
+}
diff --git a/src/mainboard/google/volteer/spd/Makefile.inc b/src/mainboard/google/volteer/spd/Makefile.inc
new file mode 100644
index 0000000..93f0f60
--- /dev/null
+++ b/src/mainboard/google/volteer/spd/Makefile.inc
@@ -0,0 +1,35 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2019 Intel Corporation.
+## Copyright 2019 Google LLC
+##
+## 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.
+##
+
+SPD_BIN = $(obj)/spd.bin
+
+ifeq ($(SPD_SOURCES),)
+	SPD_DEPS := $(error SPD_SOURCES is not set. Variant must provide this)
+else
+	SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
+endif
+
+# Include spd ROM data
+$(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/volteer/spd/samsung-K4U6E3S4AA-MGCL.spd.hex b/src/mainboard/google/volteer/spd/samsung-K4U6E3S4AA-MGCL.spd.hex
new file mode 100644
index 0000000..e1f27fb
--- /dev/null
+++ b/src/mainboard/google/volteer/spd/samsung-K4U6E3S4AA-MGCL.spd.hex
@@ -0,0 +1,32 @@
+23 11 11 0E 15 19 95 08 00 40 00 00 02 21 00 00
+48 00 04 FF 92 55 00 00 8C 00 90 A8 90 C0 08 60
+04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 7F E1 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 20 00 00 00 20 20 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 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 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/volteer/variants/baseboard/Makefile.inc b/src/mainboard/google/volteer/variants/baseboard/Makefile.inc
new file mode 100644
index 0000000..f1c6853
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/Makefile.inc
@@ -0,0 +1,21 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright 2019 Google LLC
+##
+## 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.
+##
+
+bootblock-y += gpio.c
+
+ramstage-y += gpio.c
+
+smm-y += gpio.c
+
diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
new file mode 100755
index 0000000..fe6ed2e
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -0,0 +1,391 @@
+chip soc/intel/tigerlake
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+
+	# 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 "pmc_gpe0_dw0" = "GPP_C"
+	register "pmc_gpe0_dw1" = "GPP_D"
+	register "pmc_gpe0_dw2" = "GPP_E"
+
+	# FSP configuration
+	register "SaGv" = "SaGv_Disabled"
+	register "SmbusEnable" = "0"
+
+	register "usb2_ports[0]" = "USB2_PORT_MID(OC_SKIP)"	# Type-A Port A0
+	register "usb2_ports[1]" = "USB2_PORT_MID(OC_SKIP)"	# Type-A Port A1
+	register "usb2_ports[2]" = "USB2_PORT_MID(OC_SKIP)"	# M.2 WWAN
+	register "usb2_ports[3]" = "USB2_PORT_MID(OC_SKIP)"	# Type-A / Type-C Cl
+	register "usb2_ports[4]" = "USB2_PORT_MID(OC_SKIP)"	# M.2 Camera
+	register "usb2_ports[5]" = "USB2_PORT_EMPTY"		# Type-A / Type-C Not Used
+	register "usb2_ports[6]" = "USB2_PORT_EMPTY"		# Type-A / Type-C Not Used
+	register "usb2_ports[7]" = "USB2_PORT_EMPTY"		# Type-A / Type-C Not Used
+	register "usb2_ports[8]" = "USB2_PORT_MID(OC_SKIP)"	# Type-A / Type-C Co
+	register "usb2_ports[9]" = "USB2_PORT_MID(OC_SKIP)"	# M.2 Bluetooth
+
+	register "usb3_ports[0]" = "USB3_PORT_DEFAULT(OC1)"	# USB3/2 Type A port A0
+	register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC2)"	# USB3/2 Type A port A1
+	register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC_SKIP)"	# M.2 WWAN
+	register "usb3_ports[3]" = "USB3_PORT_DEFAULT(OC_SKIP)"	# M.2 Camera
+
+	# Enable Pch iSCLK
+	register "pch_isclk" = "1"
+
+	# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
+	register "gen1_dec" = "0x00fc0801"
+	register "gen2_dec" = "0x000c0201"
+	# EC memory map range is 0x900-0x9ff
+	register "gen3_dec" = "0x00fc0901"
+
+	# Enable NVMe PCIE 9 using clk 0
+	register "PcieRpEnable[8]" = "1"
+	register "PcieClkSrcUsage[0]" = "8"
+	register "PcieClkSrcClkReq[0]" = "0"
+
+	# Enable SD Card PCIE 8 using clk 3
+	register "PcieRpEnable[7]" = "1"
+	register "PcieClkSrcUsage[3]" = "7"
+	register "PcieClkSrcClkReq[3]" = "3"
+	register "sdcard_cd_gpio" = "GPP_E11"
+
+	# Enable WLAN PCIE 7 using clk 1
+	register "PcieRpEnable[6]" = "1"
+	register "PcieClkSrcUsage[1]" = "6"
+	register "PcieClkSrcClkReq[1]" = "1"
+
+	# Enable WWAN PCIE 6 using clk 2
+	register "PcieRpEnable[5]" = "1"
+	register "PcieClkSrcUsage[2]" = "5"
+	register "PcieClkSrcClkReq[2]" = "2"
+
+	# Mark SRCCLKREQ pins as unused that are routed for a Non-Clkreq functionality
+	register "PcieClkSrcUsage[4]" = "0xFF"
+	register "PcieClkSrcUsage[5]" = "0xFF"
+	register "PcieClkSrcUsage[6]" = "0xFF"
+
+	# Enable SATA
+	register "SataEnable" = "1"
+	register "SataMode" = "0"
+	register "SataSalpSupport" = "1"
+	register "SataPortsEnable[0]" = "0"
+	register "SataPortsEnable[1]" = "1"
+	register "SataPortsDevSlp[0]" = "0"
+
+	register "SerialIoI2cMode" = "{
+		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C1]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C2]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C3]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C4]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C5]  = PchSerialIoPci,
+	}"
+
+	register "SerialIoGSpiMode" = "{
+		[PchSerialIoIndexGSPI0] = PchSerialIoPci,
+		[PchSerialIoIndexGSPI1] = PchSerialIoPci,
+		[PchSerialIoIndexGSPI2] = PchSerialIoDisabled,
+		[PchSerialIoIndexGSPI3] = PchSerialIoDisabled,
+	}"
+
+	register "SerialIoGSpiCsMode" = "{
+		[PchSerialIoIndexGSPI0] = 1,
+		[PchSerialIoIndexGSPI1] = 1,
+		[PchSerialIoIndexGSPI2] = 0,
+		[PchSerialIoIndexGSPI3] = 0,
+	}"
+
+	register "SerialIoGSpiCsState" = "{
+		[PchSerialIoIndexGSPI0] = 0,
+		[PchSerialIoIndexGSPI1] = 0,
+		[PchSerialIoIndexGSPI2] = 0,
+		[PchSerialIoIndexGSPI3] = 0,
+	}"
+
+	register "SerialIoUartMode" = "{
+		[PchSerialIoIndexUART0] = PchSerialIoPci,
+		[PchSerialIoIndexUART1] = PchSerialIoDisabled,
+		[PchSerialIoIndexUART2] = PchSerialIoDisabled,
+	}"
+
+	#HD Audio /* FIXME - TODO */
+	register "PchHdaDspEnable" = "1"
+	#register "PchHdaAudioLinkHdaEnable" = "0"
+	#register "PchHdaAudioLinkDmicEnable[0]" = "1"
+	#register "PchHdaAudioLinkDmicEnable[1]" = "1"
+	#register "PchHdaAudioLinkSspEnable[0]" = "1"
+	#register "PchHdaAudioLinkSspEnable[1]" = "1"
+        # iDisp-Link T-Mode 0: 2T, 2: 4T, 3: 8T, 4: 16T
+	#register "PchHdaIDispLinkTmode" = "2"
+        # iDisp-Link Freq 4: 96MHz, 3: 48MHz.
+	#register "PchHdaIDispLinkFrequency" = "4"
+        # Not disconnected/enumerable
+	#register "PchHdaIDispCodecDisconnect" = "0"
+
+	# ISH /* FIXME - TODO */
+	#register "PchIshSpiEnable" = "0"
+	#register "PchIshSpiCs0Enable" = "0"
+	#register "PchIshUartEnable[0]" = "0"
+	#register "PchIshUartEnable[1]" = "0"
+	#register "PchIshI2cEnable[0]" = "0"
+	#register "PchIshI2cEnable[1]" = "0"
+	#register "PchIshI2cEnable[2]" = "0"
+	#register "PchIshGpEnable[0]" = "0"
+	#register "PchIshGpEnable[1]" = "0"
+	#register "PchIshGpEnable[2]" = "0"
+	#register "PchIshGpEnable[3]" = "0"
+	#register "PchIshGpEnable[4]" = "0"
+	#register "PchIshGpEnable[5]" = "0"
+	#register "PchIshGpEnable[6]" = "0"
+	#register "PchIshGpEnable[7]" = "0"
+
+	# TCSS USB3 /* FIXME - TODO */
+	#register "TcssXhciEn" = "1"
+	#register "TcssXdciEn" = "1"
+
+	# Image clock setting
+	#register "ImguClkOutEn[0]" = "0"
+	#register "ImguClkOutEn[1]" = "0"
+	#register "ImguClkOutEn[2]" = "1"
+	#register "ImguClkOutEn[3]" = "1"
+	#register "ImguClkOutEn[4]" = "0"
+
+	# DP port
+	register "DdiPortAConfig" = "1"
+	register "DdiPortBConfig" = "0"
+
+	register "DdiPortAHpd" = "1"
+	register "DdiPortBHpd" = "1"
+	register "DdiPortCHpd" = "0"
+	register "DdiPort1Hpd" = "1"
+	register "DdiPort2Hpd" = "1"
+	register "DdiPort3Hpd" = "0"
+	register "DdiPort4Hpd" = "0"
+
+	register "DdiPortADdc" = "0"
+	register "DdiPortBDdc" = "1"
+	register "DdiPortCDdc" = "0"
+	register "DdiPort1Ddc" = "0"
+	register "DdiPort2Ddc" = "0"
+	register "DdiPort3Ddc" = "0"
+	register "DdiPort4Ddc" = "0"
+
+	# Disable PM to allow for shorter irq pulses
+	register "gpio_override_pm" = "1"
+	register "gpio_pm[0]" = "0"
+	register "gpio_pm[1]" = "0"
+	register "gpio_pm[2]" = "0"
+	register "gpio_pm[3]" = "0"
+	register "gpio_pm[4]" = "0"
+
+	# Enable "Intel Speed Shift Technology"
+	register "speed_shift_enable" = "1"
+
+	# Enable S0ix
+	register "s0ix_enable" = "1"
+
+	# Intel Common SoC Config
+        #+-------------------+---------------------------+
+        #| Field             |  Value                    |
+        #+-------------------+---------------------------+
+        #| chipset_lockdown  | CHIPSET_LOCKDOWN_COREBOOT |
+        #| GSPI0             | cr50 TPM. Early init is   |
+        #|                   | required to set up a BAR  |
+        #|                   | for TPM communication     |
+        #|                   | before memory is up       |
+        #| GSPI1             | Fingerprint MCU
+        #| I2C0              | Audio                     |
+        #| I2C1              | Touchscreen               |
+        #| I2C2              | WLAN, SAR0                |
+        #| I2C3              | Camera, SAR1              |
+        #| I2C5              | Trackpad                  |
+        #| pch_thermal_trip  | PCH Trip Temperature      |
+        #+-------------------+---------------------------+
+        register "common_soc_config" = "{
+                .chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
+		.gspi[0] = {
+			.speed_mhz = 1,
+			.early_init = 1,
+		},
+                .i2c[0] = {
+                        .speed = I2C_SPEED_FAST,
+                },
+                .i2c[1] = {
+                        .speed = I2C_SPEED_FAST,
+                },
+                .i2c[2] = {
+                        .speed = I2C_SPEED_FAST,
+                },
+                .i2c[3] = {
+                        .speed = I2C_SPEED_FAST,
+                },
+                .i2c[5] = {
+                        .speed = I2C_SPEED_FAST,
+                },
+                .pch_thermal_trip = 75,
+        }"
+
+	device domain 0 on
+		#From EDS(575683)
+		device pci 00.0 on  end # Host Bridge			0x9A14:U/0x9A12:Y
+		device pci 02.0 on  end # Graphics
+		device pci 04.0 on  end # DPTF				0x9A03
+		device pci 05.0 off end # IPU				0x9A19
+		device pci 06.0 off end # PEG60				0x9A09
+		device pci 07.0 on end # TBT_PCIe0			0x9A23
+		device pci 07.1 on end # TBT_PCIe1			0x9A25
+		device pci 07.2 on end # TBT_PCIe2			0x9A27
+		device pci 07.3 on end # TBT_PCIe3			0x9A29
+		device pci 08.0 on  end # GNA				0x9A11
+		device pci 09.0 off end # NPK				0x9A33
+		device pci 0a.0 off end # Crash-log SRAM		0x9A0D
+		device pci 0d.0 on  end # USB xHCI			0x9A13
+		device pci 0d.1 off end # USB xDCI (OTG)		0x9A15
+		device pci 0d.2 off end # TBT DMA0			0x9A1B
+		device pci 0d.3 off end # TBT DMA1			0x9A1D
+		device pci 0e.0 off end # VMD				0x9A0B
+
+		# From PCH EDS(576591)
+		device pci 10.0 on  end # I2C6				0xA0D8
+		device pci 10.1 off end # I2C7				0xA0D9
+		device pci 10.2 on  end # CNVi: BT			0xA0F5 - A0F7
+		device pci 10.6 off end # THC0				0xA0D0
+		device pci 10.7 off end # THC1				0xA0D1
+
+		device pci 11.0 off end # UART3				0xA0DA
+		device pci 11.1 off end # UART4				0xA0DB
+		device pci 11.2 off end # UART5				0xA0DC
+		device pci 11.3 off end # UART6				0xA0DD
+
+		device pci 12.0 off end # SensorHUB			0xA0FC
+		device pci 12.6 off end # GSPI2				0x34FB
+
+		device pci 13.0 off end # GSPI3				0xA0FD
+		device pci 13.1 off end # GSPI4				0xA0FE
+		device pci 13.2 off end # GSPI5				0xA0DE
+		device pci 13.3 off end # GSPI6				0xA0DF
+
+		device pci 14.0 on  end # USB3.1 xHCI			0xA0ED
+		device pci 14.1 off end # USB3.1 xDCI			0xA0EE
+		device pci 14.2 on  end # Shared RAM			0xA0EF
+		device pci 14.3 on  end # CNVi: WiFi			0xA0F0 - A0F3
+
+		device pci 15.0 on
+			chip drivers/i2c/generic
+				register "hid" = ""10EC5682""
+				register "name" = ""RT58""
+				register "desc" = ""Realtek RT5682""
+				register "irq" = "ACPI_IRQ_EDGE_HIGH(GPP_F8_IRQ)"
+				# Set the jd_src to RT5668_JD1 for jack detection
+				register "property_count" = "1"
+				register "property_list[0].type" = "ACPI_DP_TYPE_INTEGER"
+				register "property_list[0].name" = ""realtek,jd-src""
+				register "property_list[0].integer" = "1"
+				device i2c 1a on end
+			end
+		end # I2C #0			0xA0E8
+		device pci 15.1 on  end # I2C1				0xA0E9
+		device pci 15.2 on
+			chip drivers/i2c/sx9310
+				register "desc" = ""SAR0 Proximity Sensor""
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_F14_IRQ)"
+				register "speed" = "I2C_SPEED_FAST"
+				register "uid" = "0"
+				register "reg_prox_ctrl0" = "0x10"
+				register "reg_prox_ctrl1" = "0x00"
+				register "reg_prox_ctrl2" = "0x84"
+				register "reg_prox_ctrl3" = "0x0e"
+				register "reg_prox_ctrl4" = "0x07"
+				register "reg_prox_ctrl5" = "0xc6"
+				register "reg_prox_ctrl6" = "0x20"
+				register "reg_prox_ctrl7" = "0x0d"
+				register "reg_prox_ctrl8" = "0x8d"
+				register "reg_prox_ctrl9" = "0x43"
+				register "reg_prox_ctrl10" = "0x1f"
+				register "reg_prox_ctrl11" = "0x00"
+				register "reg_prox_ctrl12" = "0x00"
+				register "reg_prox_ctrl13" = "0x00"
+				register "reg_prox_ctrl14" = "0x00"
+				register "reg_prox_ctrl15" = "0x00"
+				register "reg_prox_ctrl16" = "0x00"
+				register "reg_prox_ctrl17" = "0x00"
+				register "reg_prox_ctrl18" = "0x00"
+				register "reg_prox_ctrl19" = "0x00"
+				register "reg_sar_ctrl0" = "0x50"
+				register "reg_sar_ctrl1" = "0x8a"
+				register "reg_sar_ctrl2" = "0x3c"
+				device i2c 28 on end
+			end
+		end # I2C2				0xA0EA
+		device pci 15.3 on  end # I2C3				0xA0EB
+
+		device pci 16.0 on  end # HECI1				0xA0E0
+		device pci 16.1 off end # HECI2				0xA0E1
+		device pci 16.2 off end # CSME				0xA0E2
+		device pci 16.3 off end # CSME				0xA0E3
+		device pci 16.4 off end # HECI3				0xA0E4
+		device pci 16.5 off end # HECI4				0xA0E5
+
+		device pci 17.0 on  end # SATA				0xA0D3
+
+		device pci 19.0 on  end # I2C4				0xA0C5
+		device pci 19.1 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_E15_IRQ)"
+				register "probed" = "1"
+				device i2c 15 on end
+			end
+		end # I2C5				0xA0C6
+		device pci 19.2 off end # UART2				0xA0C7
+
+		device pci 1c.0 on  end # RP1				0xA0B8
+		device pci 1c.1 off end # RP2				0xA0B9
+		device pci 1c.2 off end # RP3				0xA0BA
+		device pci 1c.3 off end # RP4				0xA0BB
+		device pci 1c.4 off end # RP5				0xA0BC
+		device pci 1c.5 on  end # WWAN RP6			0xA0BD
+		device pci 1c.6 on  end # RP7				0xA0BE
+		device pci 1c.7 on  end # SD Card RP8			0xA0BF
+
+		device pci 1d.0 on  end # RP9				0xA0B0
+		device pci 1d.1 off end # RP10				0xA0B1
+		device pci 1d.2 off end # RP11				0xA0B2
+		device pci 1d.3 off end # RP12				0xA0B3
+		device pci 1d.4 off end # RP13				0xA0B4
+		device pci 1d.5 off end # RP14				0xA0B5
+		device pci 1d.6 off end # RP15				0xA0B6
+		device pci 1d.7 off end # RP16				0xA0B7
+
+		device pci 1e.0 on  end # UART0				0xA0A8
+		device pci 1e.1 off end # UART1				0xA0A9
+		device pci 1e.2 on
+			chip drivers/spi/acpi
+				register "hid" = "ACPI_DT_NAMESPACE_HID"
+				register "compat_string" = ""google,cr50""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_C21_IRQ)"
+				device spi 0 on end
+			end
+		end # GSPI0				0xA0AA
+		device pci 1e.3 on  end # GSPI1				0xA0AB
+
+		device pci 1f.0 on  end # eSPI				0xA080 - A09F
+		device pci 1f.1 off end # P2SB				0xA0A0
+		device pci 1f.2 on  end # PMC				0xA0A1
+		device pci 1f.3 on
+			chip drivers/generic/max98357a
+				register "sdmode_gpio" =  "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
+				register "sdmode_delay" = "5"
+				device generic 0 on end
+			end
+		end # Intel HD audio		0xA0C8-A0CF
+		device pci 1f.4 off end # SMBus				0xA0A3
+		device pci 1f.5 on  end # SPI				0xA0A4
+		device pci 1f.6 off end # GbE				0x15E1/0x15E2
+		device pci 1f.7 off end # TH				0xA0A6
+	end
+end
diff --git a/src/mainboard/google/volteer/variants/baseboard/gpio.c b/src/mainboard/google/volteer/variants/baseboard/gpio.c
new file mode 100644
index 0000000..7093d6a
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/gpio.c
@@ -0,0 +1,477 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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/gpio.h>
+#include <baseboard/variants.h>
+#include <commonlib/helpers.h>
+
+/* Pad configuration in ramstage */
+/* Leave eSPI pins untouched from default settings */
+static const struct pad_config gpio_table[] = {
+	/* A0 thru A6 come configured out of reset, do not touch */
+	/* A0  : ESPI_IO0 ==> ESPI_IO_0 */
+	/* A1  : ESPI_IO1 ==> ESPI_IO_1 */
+	/* A2  : ESPI_IO2 ==> ESPI_IO_2 */
+	/* A3  : ESPI_IO3 ==> ESPI_IO_3 */
+	/* A4  : ESPI_CS# ==> ESPI_CS_L */
+	/* A5  : ESPI_CLK ==> ESPI_CLK */
+	/* A6  : ESPI_RESET# ==> NC(TP764) */
+	/* A7  : I2S2_SCLK ==> EN_PP3300_TRACKPAD */
+	PAD_CFG_GPO(GPP_A7, 1, DEEP),
+	/* A8  : I2S2_SFRM ==> EN_PP3300_TOUCHSCREEN */
+	PAD_CFG_GPO(GPP_A8, 1, DEEP),
+	/* A9  : I2S2_TXD ==> EC_IN_RW_OD */
+	PAD_CFG_GPI(GPP_A9, NONE, DEEP),
+	/* A10 : I2S2_RXD ==> EN_SPKR_PA */
+	PAD_CFG_GPO(GPP_A10, 1, DEEP),
+	/* A11 : PMC_I2C_SDA ==> SSD_PERST_ODL */
+	PAD_CFG_GPO(GPP_A11, 1, DEEP),
+	/* A12 : SATAXPCIE1 ==> M2_SSD_PEDET */
+	PAD_CFG_NF(GPP_A12, NONE, DEEP, NF1),
+	/* A13 : PMC_I2C_SCL ==> BT_DISABLE_L */
+	PAD_CFG_GPO(GPP_A13, 1, DEEP),
+	/* A14 : USB_OC1# ==> USB_A0_OC_ODL */
+	PAD_CFG_NF(GPP_A14, NONE, DEEP, NF1),
+	/* A15 : USB_OC2# ==> USB_A1_OC_ODL */
+	PAD_CFG_NF(GPP_A15, NONE, DEEP, NF1),
+	/* A16 : USB_OC3# ==> USB_C0_OC_ODL */
+	PAD_CFG_NF(GPP_A16, NONE, DEEP, NF1),
+	/* A17 : DDSP_HPDC ==> MEM_CH_SEL */
+	PAD_CFG_GPI(GPP_A17, NONE, DEEP),
+	/* A18 : DDSP_HPDB ==> HDMI_HPD */
+	PAD_CFG_NF(GPP_A18, NONE, DEEP, NF1),
+	/* A19 : DDSP_HPD1 ==> USB_C0_DP_HPD */
+	PAD_CFG_NF(GPP_A19, NONE, DEEP, NF1),
+	/* A20 : DDSP_HPD2 ==> USB_C1_DP_HPD */
+	PAD_CFG_NF(GPP_A20, NONE, DEEP, NF1),
+	/* A21 : DDPC_CTRCLK ==> EN_FP_PWR */
+	PAD_CFG_GPO(GPP_A21, 1, DEEP),
+	/* A22 : DDPC_CTRLDATA ==> EN_HDMI_PWR */
+	PAD_CFG_GPO(GPP_A22, 1, DEEP),
+	/* A23 : I2S1_SCLK ==> I2S1_SPKR_SCLK */
+	PAD_CFG_NF(GPP_A23, NONE, DEEP, NF1),
+
+	/* B0  : CORE_VID0 */
+	PAD_CFG_NF(GPP_B0, NONE, DEEP, NF1),
+	/* B1  : CORE_VID1 */
+	PAD_CFG_NF(GPP_B1, NONE, DEEP, NF1),
+	/* B2  : VRALERT# ==> VRALERT_L */
+	PAD_CFG_NF(GPP_B2, NONE, DEEP, NF1),
+	/* B3  : CPU_GP2 ==> PEN_DET_ODL */
+	PAD_CFG_GPI(GPP_B3, NONE, DEEP),
+	/* B4  : CPU_GP3 ==> NC */
+	PAD_NC(GPP_B4, NONE),
+	/* B5  : ISH_I2C0_CVF_SDA */
+	PAD_CFG_NF(GPP_B5, NONE, DEEP, NF1),
+	/* B6  : ISH_I2C0_CVF_SCL */
+	PAD_CFG_NF(GPP_B6, NONE, DEEP, NF1),
+	/* B7  : ISH_12C1_SDA ==> ISH_I2C0_SENSOR_SDA */
+	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1),
+	/* B8  : ISH_I2C1_SCL ==> ISH_I2C0_SENSOR_SCL */
+	PAD_CFG_NF(GPP_B8, NONE, DEEP, NF1),
+	/* B9  : I2C5_SDA ==> PCH_I2C5_TRACKPAD_SDA */
+	PAD_CFG_NF(GPP_B9, NONE, DEEP, NF1),
+	/* B10 : I2C5_SCL ==> PCH_I2C5_TRACKPAD_SCL */
+	PAD_CFG_NF(GPP_B10, NONE, DEEP, NF1),
+	/* B11 : PMCALERT# ==> PCH_WP_OD */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_B11, NONE, DEEP),
+	/* B12 : SLP_S0# ==> SLP_S0_L */
+	PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
+	/* B13 : PLTRST# ==> PLT_RST_L */
+	PAD_CFG_NF(GPP_B13, NONE, DEEP, NF1),
+	/* B14 : SPKR ==> GPP_B14_STRAP */
+	PAD_NC(GPP_B14, NONE),
+	/* B15 : GSPI0_CS0# ==> PCH_GSPI0_H1_TPM_CS_L */
+	PAD_CFG_NF(GPP_B15, NONE, DEEP, NF1),
+	/* B16 : GSPI0_CLK ==> PCH_GSPI0_H1_TPM_CLK */
+	PAD_CFG_NF(GPP_B16, NONE, DEEP, NF1),
+	/* B17 : GSPI0_MISO ==> PCH_GSPIO_H1_TPM_MISO */
+	PAD_CFG_NF(GPP_B17, NONE, DEEP, NF1),
+	/* B18 : GSPI0_MOSI ==> PCH_GSPI0_H1_TPM_MOSI_STRAP */
+	PAD_CFG_NF(GPP_B18, DN_20K, DEEP, NF1),
+	/* B19 : GSPI1_CS0# ==> PCH_GSPI1_FPMCU_CS_L */
+	PAD_CFG_NF(GPP_B19, NONE, DEEP, NF1),
+	/* B20 : GSPI1_CLK ==> PCH_GSPI1_FPMCU_CLK */
+	PAD_CFG_NF(GPP_B20, NONE, DEEP, NF1),
+	/* B21 : GSPI1_MISO ==> PCH_GSPI1_FPMCU_MISO */
+	PAD_CFG_NF(GPP_B21, NONE, DEEP, NF1),
+	/* B22 : GSPI1_MOSI ==> PCH_GSPI1_GPMCU_MOSI */
+	PAD_CFG_NF(GPP_B22, NONE, DEEP, NF1),
+	/* B23 : SML1ALERT# ==> GPP_B23_STRAP # */
+	PAD_NC(GPP_B23, DN_20K),
+
+	/* C0  : SMBCLK ==> EN_PP3300_WLAN */
+	PAD_CFG_GPO(GPP_C0, 1, DEEP),
+	/* C1  : SMBDATA ==> NOT USED */
+	PAD_NC(GPP_C1, NONE),
+	/* C2  : SMBALERT# ==> GPP_C2_STRAP */
+	PAD_NC(GPP_C2, DN_20K),
+	/* C3  : SML0CLK ==> USB4_SMB_SCL */
+	PAD_CFG_NF(GPP_C3, NONE, DEEP, NF1),
+	/* C4  : SML0DATA ==> USB4_SMB_SDA */
+	PAD_CFG_NF(GPP_C4, NONE, DEEP, NF1),
+	/* C5  : SML0ALERT# ==> USB_SMB_INT_L_BOOT_STRAP0 */
+	PAD_NC(GPP_C5, DN_20K),
+	/* C6  : SML1CLK ==> EC_PCH_INT_ODL */
+	PAD_CFG_GPI_SCI_LOW(GPP_C6, NONE, PLTRST, EDGE_SINGLE),
+	/* C7  : SML1DATA ==> EN_USI_CHARGE */
+	PAD_CFG_GPO(GPP_C7, 1, DEEP),
+	/* C8  : UART0_RXD ==> UART_PCH_RX_DEBUG_TX */
+	PAD_CFG_NF(GPP_C8, NONE, DEEP, NF1),
+	/* C9  : UART0_TXD ==> UART_PCH_TX_DEBUG_RX */
+	PAD_CFG_NF(GPP_C9, NONE, DEEP, NF1),
+	/* C10 : UART0_RTS# ==> USI_RST_L */
+	PAD_CFG_GPO(GPP_C10, 1, DEEP),
+	/* C11 : UART0_CTS# ==> CVF_LPSS_INT_L */
+	PAD_CFG_GPI(GPP_C11, NONE, DEEP),
+	/* C12 : UART1_RXD ==> MEM_STRAP_0 */
+	PAD_CFG_GPI(GPP_C12, NONE, DEEP),
+	/* C13 : UART1_TXD ==> EN_PP5000_TRACKPAD */
+	PAD_CFG_GPO(GPP_C13, 1, DEEP),
+	/* C14 : UART1_RTS# ==> MEM_STRAP_2 */
+	PAD_CFG_GPI(GPP_C14, NONE, DEEP),
+	/* C15 : UART1_CTS# ==> MEM_STRAP_1 */
+	PAD_CFG_GPI(GPP_C15, NONE, DEEP),
+	/* C16 : I2C0_SDA ==> PCH_I2C0_1V8_AUDIO_SDA */
+	PAD_CFG_NF(GPP_C16, NONE, DEEP, NF1),
+	/* C17 : I2C0_SCL ==> PCH_I2C0_1V8_AUDIO_SCL */
+	PAD_CFG_NF(GPP_C17, NONE, DEEP, NF1),
+	/* C18 : I2C1_SDA ==> PCH_I2C1_TOUCH_USI_SDA */
+	PAD_CFG_NF(GPP_C18, NONE, DEEP, NF1),
+	/* C19 : I2C1_SCL ==> PCH_I2C1_TOUCH_USI_SCL */
+	PAD_CFG_NF(GPP_C19, NONE, DEEP, NF1),
+	/* C20 : UART2_RXD ==> FPMCU_INT_L */
+	PAD_CFG_GPI_SCI_LOW(GPP_C20, NONE, PLTRST, EDGE_SINGLE),
+	/* C21 : UART2_TXD ==> H1_PCH_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_C21, NONE, PLTRST, LEVEL, INVERT),
+	/* C22 : UART2_RTS# ==> PCH_FPMCU_BOOT0 */
+	PAD_CFG_GPO(GPP_C22, 0, DEEP),
+	/* C23 : UART2_CTS# ==> FPMCU_RST_ODL */
+	PAD_CFG_GPO(GPP_C23, 1, DEEP),
+
+	/* D0  : ISH_GP0 ==> ISH_IMU_INT_L */
+	PAD_NC(GPP_D0, UP_20K),
+	/* D1  : ISH_GP1 ==> ISH_ACCEL_INT_L */
+	PAD_CFG_GPI(GPP_D1, UP_20K, DEEP),
+	/* D2  : ISH_GP2 ==> ISH_LID_OPEN */
+	PAD_CFG_GPI(GPP_D2, UP_20K, DEEP),
+	/* D3  : ISH_GP3 ==> ISH_ALS_RGB_INT_L */
+	PAD_CFG_GPI(GPP_D3, UP_20K, DEEP),
+	/* D4  : IMGCLKOUT0 ==> FCAM_RST_L */
+	PAD_CFG_GPO(GPP_D4, 0, PLTRST),
+	/* D5  : SRCCLKREQ0$ ==> SSD_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D5, NONE, DEEP, NF1),
+	/* D6  : SRCCLKREQ1# ==> WLAN_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D6, NONE, DEEP, NF1),
+	/* D7  : SRCCLKREQ2# ==> WWAN_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D7, NONE, DEEP, NF1),
+	/* D8  : SRCCLKREQ3# ==> SD_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D8, NONE, DEEP, NF1),
+	/* D9  : ISH_SPI_CS# ==> PCH_GSPI2_CVF_CS_L */
+	PAD_CFG_NF(GPP_D9, NONE, DEEP, NF7),
+	/* D10 : ISH_SPI_CLK ==> PCH_GSPI2_CVF_CLK_STRAP */
+	PAD_CFG_NF(GPP_D10, DN_20K, DEEP, NF7),
+	/* D11 : ISH_SPI_MISO ==> PCH_GSPI2_CVF_MISO */
+	PAD_CFG_NF(GPP_D11, NONE, DEEP, NF7),
+	/* D12 : ISH_SPI_MOSI ==> PCH_GSPI2_CVF_MISO_STRAP */
+	PAD_CFG_NF(GPP_D12, DN_20K, DEEP, NF7),
+	/* D13 : ISH_UART0_RXD ==> UART_ISH_RX_DEBUG_TX */
+	PAD_CFG_NF(GPP_D13, NONE, DEEP, NF1),
+	/* D14 : ISH_UART0_TXD ==> UART_ISH_TX_DEBUG_RX */
+	PAD_CFG_NF(GPP_D14, NONE, DEEP, NF1),
+	/* D15 : ISH_UART0_RTS# ==> MEM_STRAP_3 */
+	PAD_CFG_GPI(GPP_D15, NONE, DEEP),
+	/* D16 : ISH_UART0_CTS# ==> EN_PP3300_SD */
+	PAD_CFG_GPO(GPP_D16, 1, DEEP),
+	/* D17 : ISH_GP4 ==> EN_FCAM_PWR */
+	PAD_CFG_GPO(GPP_D17, 1, DEEP),
+	/* D18 : ISH_GP5 ==> FCAM_SNRPWR_EN */
+	PAD_CFG_GPO(GPP_D18, 1, DEEP),
+	/* D19 : I2S_MCLK1 ==> I2S_MCLK1 */
+	PAD_CFG_NF(GPP_D19, NONE, DEEP, NF1),
+
+	/* E0  : SATAXPCIE0 ==> USB_A1_RT_RST_ODL */
+	PAD_CFG_GPO(GPP_E0, 1, DEEP),
+	/* E1  : SPI1_IO2 ==> PEN_DET_ODL */
+	PAD_CFG_GPI_SCI_LOW(GPP_E1, NONE, DEEP, EDGE_SINGLE),
+	/* E2  : SPI1_IO3 ==> WLAN_PCIE_WAKE_ODL */
+	PAD_CFG_GPI(GPP_E2, NONE, DEEP),
+	/* E3  : CPU_GP0 ==> USI_REPORT_EN */
+	PAD_CFG_GPO(GPP_E3, 1, DEEP),
+	/* E4  : SATA_DEVSLP0 ==> M2_SSD_PE_WAKE_ODL */
+	PAD_NC(GPP_E4, NONE),
+	/* E5  : SATA_DEVSLP1 ==> M2_SSD_DEVSLP_OD */
+	PAD_CFG_NF(GPP_E5, NONE, DEEP, NF1),
+	/* E6  : THC0_SPI1_RST# ==> GPPE6_STRAP */
+	PAD_NC(GPP_E6, NONE),
+	/* E7  : CPU_GP1 ==> USI_INT */
+	PAD_CFG_GPI(GPP_E7, NONE, DEEP),
+	/* E8  : SPI1_CS1# ==> SLP_S0IX */
+	PAD_CFG_GPO(GPP_E8, 0, DEEP),
+	/* E9  : USB2_OC0# ==> USB_C1_OC_ODL */
+	PAD_CFG_NF(GPP_E9, NONE, DEEP, NF1),
+	/* E10 : SPI1_CS# ==> USB_C0_AUXP_DC */
+	PAD_CFG_GPO(GPP_E10, 0, DEEP),
+	/* E11 : SPI1_CLK ==> SD_PE_WAKE_ODL */
+	PAD_CFG_GPI(GPP_E11, NONE, DEEP),
+	/* E12 : SPI1_MISO_IO1 ==> NOT USED */
+	PAD_NC(GPP_E12, NONE),
+	/* E13 : SPI1_MOSI_IO0 ==> USB_C0_AUXN_DC */
+	PAD_CFG_GPO(GPP_E13, 0, DEEP),
+	/* E14 : DDPC_HPDA ==> SOC_EDP_HPD */
+	PAD_CFG_NF(GPP_E14, NONE, DEEP, NF1),
+	/* E15 : ISH_GP6 ==> TRACKPAD_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_E15, NONE, PLTRST, LEVEL, INVERT),
+	/* E16 : ISH_GP7 ==> WWAN_SIM1_DET_OD */
+	PAD_CFG_GPI(GPP_E16, NONE, DEEP),
+	/* E17 : THC0_SPI1_INT# ==> WWAN_PERST_L */
+	PAD_CFG_TERM_GPO(GPP_E17, 1, DN_20K, DEEP),
+	/* E18 : DDP1_CTRLCLK ==> USB_C0_LSX_SOC_TX */
+	PAD_CFG_NF(GPP_E18, NONE, DEEP, NF4),
+	/* E19 : DDP1_CTRLDATA ==> USB0_C0_LSX_SOC_RX_STRAP */
+	PAD_CFG_NF(GPP_E19, DN_20K, DEEP, NF4),
+	/* E20 : DDP2_CTRLCLK ==> USB_C1_LSX_SOC_TX */
+	PAD_CFG_NF(GPP_E20, NONE, DEEP, NF4),
+	/* E21 : DDP2_CTRLDATA ==> USB_C1_LSX_SOC_RX_STRAP */
+	PAD_CFG_NF(GPP_E21, NONE, DEEP, NF4),
+	/* E22 : DDPA_CTRLCLK ==> USB_C1_AUXP_DC: Retimer FW drives this pin */
+	PAD_NC(GPP_E22, NONE),
+	/* E23 : DDPA_CTRLDATA ==> USB_C1_AUXN_DC: Retimer FW drives this pin */
+	PAD_NC(GPP_E23, NONE),
+
+	/* F0  : CNV_BRI_DT ==> CNV_BRI_DT_STRAP */
+	PAD_CFG_NF(GPP_F0, NONE, DEEP, NF1),
+	/* F1  : CNV_BRI_RSP ==> NCV_BRI_RSP */
+	PAD_CFG_NF(GPP_F1, UP_20K, DEEP, NF1),
+	/* F2  : I2S2_TXD ==> CNV_RGI_DT_STRAP */
+	PAD_CFG_NF(GPP_F2, NONE, DEEP, NF1),
+	/* F3  : I2S2_RXD ==> CNV_RGI_RSP */
+	PAD_CFG_NF(GPP_F3, UP_20K, DEEP, NF1),
+	/* F4  : CNV_RF_RESET# ==> CNV_RF_RST_L */
+	PAD_CFG_NF(GPP_F4, NONE, DEEP, NF1),
+	/* F5  : MODEM_CLKREQ ==> CNV_CLKREQ0 */
+	PAD_CFG_NF(GPP_F5, NONE, DEEP, NF3),
+	/* F6  : CNV_PA_BLANKING ==> WWAN_WLAN_COEX3 */
+	PAD_CFG_NF(GPP_F6, NONE, DEEP, NF1),
+	/* F7  : GPPF7_STRAP */
+	PAD_NC(GPP_F7, DN_20K),
+	/* F8  : I2S_MCLK2_INOUT ==> HP_INT_L */
+	PAD_CFG_GPI_APIC(GPP_F8, UP_20K, DEEP, EDGE_BOTH, INVERT),
+	/* F9  : Reserved ==> NC */
+	/* F10 : GPPF10_STRAP */
+	PAD_NC(GPP_F10, DN_20K),
+	/* F11 : THC1_SPI2_CLK ==> EN_PP3300_WWAN */
+	PAD_CFG_GPO(GPP_F11, 1, DEEP),
+	/* F12 : GSXDOUT ==> WWAN_RST_ODL */
+	PAD_CFG_GPO(GPP_F12, 1, DEEP),
+	/* F13 : GSXDOUT ==> WiFi_DISABLE_L */
+	PAD_CFG_GPO(GPP_F13, 1, DEEP),
+	/* F14 : GSXDIN ==> SAR0_INT_L */
+	PAD_CFG_GPI_SCI_LOW(GPP_F14, NONE, PLTRST, EDGE_SINGLE),
+	/* F15 : GSXSRESET# ==> RCAM_RST_L */
+	PAD_CFG_GPO(GPP_F15, 1, DEEP),
+	/* PAD_CFG_GPI_SCI_LOW(GPP_F15, NONE, PLTRST, EDGE_SINGLE), */
+	/* F16 : GSXCLK ==> WWAN_DPR_SAR_ODL */
+	PAD_CFG_GPO(GPP_F16, 1, DEEP),
+	/* F17 : WWAN_RF_DISABLE_ODL */
+	PAD_CFG_GPO(GPP_F17, 1, DEEP),
+	/* F18 : THC1_SPI2_INT# ==> WWAN_PCIE_WAKE_ODL */
+	PAD_CFG_GPI_SCI_LOW(GPP_F18, NONE, DEEP, EDGE_SINGLE),
+	/* F19 : SRCCLKREQ6# ==> WLAN_INT_L */
+	PAD_CFG_GPI_SCI_LOW(GPP_F19, NONE, DEEP, EDGE_SINGLE),
+	/* F20 : EXT_PWR_GATE# ==> EXT_PWR_GATE_L */
+	PAD_CFG_NF(GPP_F20, NONE, DEEP, NF1),
+	/* F21 : EXT_PWR_GATE2# ==> EXT_PWR_GATE2_L */
+	PAD_CFG_NF(GPP_F21, NONE, DEEP, NF1),
+	/* F22 : VNN_CTRL */
+	PAD_CFG_NF(GPP_F22, NONE, DEEP, NF1),
+	/* F23 : V1P05_CTRL */
+	PAD_CFG_NF(GPP_F23, NONE, DEEP, NF1),
+
+	/* H0  : GPPH0_BOOT_STRAP1 */
+	PAD_NC(GPP_H0, DN_20K),
+	/* H1  : GPPH1_BOOT_STRAP2 */
+	PAD_NC(GPP_H1, DN_20K),
+	/* H2  : GPPH2_BOOT_STRAP3 */
+	PAD_NC(GPP_H2, DN_20K),
+	/* H3  : SX_EXIT_HOLDOFF# ==> SD_PERST_L */
+	PAD_CFG_GPO(GPP_H3, 1, DEEP),
+	/* H4  : I2C2_SDA ==> PCH_I2C2_MISC_SDA */
+	PAD_CFG_NF(GPP_H4, NONE, DEEP, NF1),
+	/* H5  : I2C2_SCL ==> PCH_I2C2_MISC_SCL */
+	PAD_CFG_NF(GPP_H5, NONE, DEEP, NF1),
+	/* H6  : I2C3_SDA ==> PCH_I2C3_CAM_SDA */
+	PAD_CFG_NF(GPP_H6, NONE, DEEP, NF1),
+	/* H7  : I2C3_SCL ==> PCH_I2C3_CAM_SCL */
+	PAD_CFG_NF(GPP_H7, NONE, DEEP, NF1),
+	/* H8  : I2C4_SDA ==> WWAN_WLAN_COEX1 */
+	PAD_CFG_NF(GPP_H8, NONE, DEEP, NF2),
+	/* H9  : I2C4_SCL ==> WWAN_WLAN_COEX2 */
+	PAD_CFG_NF(GPP_H9, NONE, DEEP, NF2),
+	/* H10 : SRCCLKREQ4# ==> USB_C1_RT_FORCE_PWR */
+	PAD_CFG_GPO(GPP_H10, 1, DEEP),
+	/* H11 : SRCCLKREQ5# ==> WLAN_PERST_L */
+	PAD_CFG_GPO(GPP_H11, 1, DEEP),
+	/* H12 : M2_SKT2_CFG0 ==> WWAN_CONFIG0 */
+	PAD_CFG_GPI(GPP_H12, NONE, DEEP),
+	/* H13 : M2_SKT2_CFG1 # ==> WWAN_CONFIG1 */
+	PAD_CFG_GPI(GPP_H13, NONE, DEEP),
+	/* H14 : M2_SKT2_CFG2 # ==> RCAM_SNRPWR_EN */
+	PAD_CFG_GPO(GPP_H14, 1, DEEP),
+	/* H15 : M2_SKT2_CFG3 # ==> WWAN_CONFIG3 */
+	PAD_CFG_GPI(GPP_H15, NONE, DEEP),
+	/* H16 : DDPB_CTRLCLK ==> DDPB_HDMI_CTRLCLK */
+	PAD_CFG_NF(GPP_H16, NONE, DEEP, NF1),
+	/* H17 : DDPB_CTRLDATA ==> DDPB_HDMI_CTRLDATA */
+	PAD_CFG_NF(GPP_H17, NONE, DEEP, NF1),
+	/* H18 : CPU_C10_GATE# ==> CPU_C10_GATE_L */
+	PAD_CFG_NF(GPP_H18, NONE, DEEP, NF1),
+	/* H19 : TIME_SYNC0 ==> USER_PRES_FP_ODL */
+	PAD_CFG_GPI(GPP_H19, NONE, DEEP),
+	/* H20 : IMGCLKOUT1 ==> EN_MIPI_RCAM_PWR */
+	PAD_CFG_GPO(GPP_H20, 1, PLTRST),
+	/* H21 : IMGCLKOUT2 ==> CAM_MCLK1 */
+	PAD_CFG_NF(GPP_H21, NONE, DEEP, NF1),
+	/* H22 : IMGCLKOUT3 ==> CAM_MCLK0 */
+	PAD_CFG_NF(GPP_H22, NONE, DEEP, NF1),
+	/* H23 : IMGCLKOUT4 ==> WWAN_ESIM_SEL_ODL */
+	PAD_CFG_GPO(GPP_H23, 1, DEEP),
+
+	/* R0 : HDA_BCLK ==> I2S0_HP_SCLK */
+	PAD_CFG_NF(GPP_R0, NONE, DEEP, NF2),
+	/* R1 : HDA_SYNC ==> I2S0_HP_SFRM */
+	PAD_CFG_NF(GPP_R1, NONE, DEEP, NF2),
+	/* R2 : HDA_SDO ==> I2S0_PCH_TX_HP_RX_STRAP */
+	PAD_CFG_NF(GPP_R2, DN_20K, DEEP, NF2),
+	/* R3 : HDA_SDIO ==> I2S0_PCH_RX_HP_TX */
+	PAD_CFG_NF(GPP_R3, NONE, DEEP, NF2),
+	/* R4 : HDA_RST# ==> HDA_RST_L */
+	PAD_CFG_NF(GPP_R4, DN_20K, DEEP, NF1),
+	/* R5 : HDA_SDI1 ==> I2S1_PCH_RX_SPKR_TX */
+	PAD_CFG_NF(GPP_R5, NONE, DEEP, NF2),
+	/* R6 : I2S1_TXD ==> I2S1_PCH_RX_SPKR_RX */
+	PAD_CFG_NF(GPP_R6, NONE, DEEP, NF2),
+	/* R7 : I2S1_SFRM ==> I2S1_SPKR_SFRM */
+	PAD_CFG_NF(GPP_R7, NONE, DEEP, NF2),
+
+	/* S0 : SNDW0_CLK ==> SNDW0_HP_CLK */
+	PAD_CFG_NF(GPP_S0, NONE, DEEP, NF1),
+	/* S1 : SNDW0_DATA ==> SNDW0_HP_DATA */
+	PAD_CFG_NF(GPP_S1, NONE, DEEP, NF1),
+	/* S2 : SNDW1_CLK ==> SNDW1_SPKR_CLK */
+	PAD_CFG_NF(GPP_S2, NONE, DEEP, NF1),
+	/* S3 : SNDW1_DATA ==> SNDW1_SPKR_DATA */
+	PAD_CFG_NF(GPP_S3, NONE, DEEP, NF1),
+	/* S4 : SNDW2_CLK ==> DMIC_CLK1 */
+	PAD_CFG_NF(GPP_S4, NONE, DEEP, NF2),
+	/* S5 : SNDW2_DATA ==> DMIC_DATA1 */
+	PAD_CFG_NF(GPP_S5, NONE, DEEP, NF2),
+	/* S6 : SNDW3_CLK ==> DMIC_CLK0 */
+	PAD_CFG_NF(GPP_S6, NONE, DEEP, NF2),
+	/* S7 : SNDW3_DATA ==> DMIC_DATA0 */
+	PAD_CFG_NF(GPP_S7, NONE, DEEP, NF2),
+
+	/* GPD0: BATLOW# ==> BATLOW_L */
+	PAD_CFG_NF(GPD0, NONE, DEEP, NF1),
+	/* GPD1: ACPRESENT ==> PCH_ACPRESENT */
+	PAD_CFG_NF(GPD1, NONE, DEEP, NF1),
+	/* GPD2: LAN_WAKE# ==> EC_PCH_WAKE_ODL */
+	PAD_CFG_GPI(GPD2, NONE, DEEP),
+	/* GPD3: PWRBTN# ==> EC_PCH_PWR_BTN_ODL */
+	PAD_CFG_NF(GPD3, NONE, DEEP, NF1),
+	/* GPD4: SLP_S3# ==> SLP_S3_L */
+	PAD_CFG_NF(GPD4, NONE, DEEP, NF1),
+	/* GPD5: SLP_S4# ==> SLP_S4_L */
+	PAD_CFG_NF(GPD5, NONE, DEEP, NF1),
+	/* GPD6: SLP_A# ==> SLP_A_L */
+	PAD_CFG_NF(GPD6, NONE, DEEP, NF1),
+	/* GPD7: GPD7_STRAP */
+	PAD_CFG_GPI(GPD7, DN_20K, DEEP),
+	/* GPD8: SUSCLK ==> PCH_SUSCLK */
+	PAD_CFG_NF(GPD8, NONE, DEEP, NF1),
+	/* GPD9: SLP_WLAN# ==> SLP_WLAN_L */
+	PAD_CFG_NF(GPD9, NONE, DEEP, NF1),
+	/* GPD10: SLP_S5# ==> SLP_S5_L */
+	PAD_CFG_NF(GPD10, NONE, DEEP, NF1),
+	/* GPD11: LANPHYC ==> NC */
+};
+
+/* Early pad configuration in bootblock */
+static const struct pad_config early_gpio_table[] = {
+	/* A12 : SATAXPCIE1 ==> M2_SSD_PEDET */
+	PAD_CFG_NF(GPP_A12, NONE, DEEP, NF1),
+
+	/* A17 : DDSP_HPDC ==> MEM_CH_SEL */
+	PAD_CFG_GPI(GPP_A17, NONE, DEEP),
+
+	/* B11 : PMCALERT# ==> PCH_WP_OD */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_B11, NONE, DEEP),
+
+	/* B15 : GSPI0_CS0# ==> PCH_GSPI0_H1_TPM_CS_L */
+	PAD_CFG_NF(GPP_B15, NONE, DEEP, NF1),
+
+	/* B16 : GSPI0_CLK ==> PCH_GSPI0_H1_TPM_CLK */
+	PAD_CFG_NF(GPP_B16, NONE, DEEP, NF1),
+
+	/* B17 : GSPI0_MISO ==> PCH_GSPIO_H1_TPM_MISO */
+	PAD_CFG_NF(GPP_B17, NONE, DEEP, NF1),
+
+	/* B18 : GSPI0_MOSI ==> PCH_GSPI0_H1_TPM_MOSI_STRAP */
+	PAD_CFG_NF(GPP_B18, DN_20K, DEEP, NF1),
+
+	/* C0  : SMBCLK ==> EN_PP3300_WLAN */
+	PAD_CFG_GPO(GPP_C0, 1, DEEP),
+
+	/* C21 : UART2_TXD ==> H1_PCH_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_C21, NONE, PLTRST, LEVEL, INVERT),
+
+	/* C22 : UART2_RTS# ==> PCH_FPMCU_BOOT0 */
+	PAD_CFG_GPO(GPP_C22, 0, DEEP),
+
+	/* E12 : SPI1_MISO_IO1 ==> EN_PP3300_SSD */
+	PAD_CFG_GPO(GPP_E12, 1, DEEP),
+
+	/* H11 : SRCCLKREQ5# ==> WLAN_PERST_L */
+	PAD_CFG_GPO(GPP_H11, 1, RSMRST),
+};
+
+const struct pad_config *__weak variant_base_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(gpio_table);
+	return gpio_table;
+}
+
+const struct pad_config *__weak variant_override_gpio_table(size_t *num)
+{
+	*num = 0;
+	return NULL;
+}
+
+const struct pad_config *variant_early_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(early_gpio_table);
+	return early_gpio_table;
+}
+
+static const struct cros_gpio cros_gpios[] = {
+	CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_COMM1_NAME),
+	CROS_GPIO_WP_AH(GPIO_PCH_WP, CROS_GPIO_COMM1_NAME),
+};
+
+const struct cros_gpio *__weak variant_cros_gpios(size_t *num)
+{
+	*num = ARRAY_SIZE(cros_gpios);
+	return cros_gpios;
+}
diff --git a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/ec.h b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/ec.h
new file mode 100644
index 0000000..85d521c
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/ec.h
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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_EC_H__
+#define __MAINBOARD_EC_H__
+
+#include <ec/ec.h>
+#include <ec/google/chromeec/ec_commands.h>
+#include <variant/gpio.h>
+
+#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_PD_MCU)            |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MODE_CHANGE)       |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX))
+
+#define MAINBOARD_EC_SMI_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED))
+
+/* EC can wake from S5 with lid or power button */
+#define MAINBOARD_EC_S5_WAKE_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
+
+/* EC can wake from S3 with lid, power button or mode change event */
+#define MAINBOARD_EC_S3_WAKE_EVENTS \
+	(MAINBOARD_EC_S5_WAKE_EVENTS |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEY_PRESSED) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MODE_CHANGE))
+
+#define MAINBOARD_EC_S0IX_WAKE_EVENTS	(MAINBOARD_EC_S3_WAKE_EVENTS)
+
+/* Log EC wake events plus EC shutdown events */
+#define MAINBOARD_EC_LOG_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_SHUTDOWN) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_SHUTDOWN) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PANIC))
+
+/*
+ * ACPI related definitions for ASL code.
+ */
+
+/* Enable EC backed ALS device in ACPI */
+#define EC_ENABLE_ALS_DEVICE
+
+/* Enable LID switch and provide wake pin for EC */
+#define EC_ENABLE_LID_SWITCH
+#define EC_ENABLE_WAKE_PIN	GPE_EC_WAKE
+
+/* Enable Tablet switch */
+#define EC_ENABLE_TBMC_DEVICE
+
+#define SIO_EC_MEMMAP_ENABLE	/* EC Memory Map Resources */
+#define SIO_EC_HOST_ENABLE	/* EC Host Interface Resources */
+#define SIO_EC_ENABLE_PS2K	/* Enable PS/2 Keyboard */
+
+/* Enable EC sync interrupt, EC_SYNC_IRQ is defined in variant/gpio.h */
+#define EC_ENABLE_SYNC_IRQ
+
+#endif /* __MAINBOARD_EC_H__ */
diff --git a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/gpio.h b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/gpio.h
new file mode 100644
index 0000000..35212a3
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/gpio.h
@@ -0,0 +1,46 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * 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 __BASEBOARD_GPIO_H__
+#define __BASEBOARD_GPIO_H__
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+/* EC in RW */
+#define GPIO_EC_IN_RW		GPP_A9
+
+/* BIOS Flash Write Protect */
+#define GPIO_PCH_WP		GPP_B11
+
+/* Memory configuration board straps */
+#define GPIO_MEM_CONFIG_0	GPP_C12
+#define GPIO_MEM_CONFIG_1	GPP_C15
+#define GPIO_MEM_CONFIG_2	GPP_C14
+#define GPIO_MEM_CONFIG_3	GPP_D15
+
+/* EC wake is LAN_WAKE# */
+#define GPE_EC_WAKE		GPE0_LAN_WAK
+
+/* EC sync IRQ */
+#define EC_SYNC_IRQ		GPP_C6_IRQ
+
+/* eSPI virtual wire reporting */
+#define EC_SCI_GPI		GPE0_ESPI
+
+/* DRAM population strap (value 0=fully-populated, 1=half-populated) */
+#define GPIO_MEM_CH_SEL		GPP_A17
+
+#endif /* BASEBOARD_GPIO_H */
diff --git a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h
new file mode 100644
index 0000000..8801ecd
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * 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 __BASEBOARD_VARIANTS_H__
+#define __BASEBOARD_VARIANTS_H__
+
+#include <soc/gpio.h>
+#include <soc/meminit.h>
+#include <stdint.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+/*
+ * The next set of functions return the gpio table and fill in the number of
+ * entries for each table.
+ */
+const struct pad_config *variant_base_gpio_table(size_t *num);
+const struct pad_config *variant_early_gpio_table(size_t *num);
+const struct pad_config *variant_override_gpio_table(size_t *num);
+
+const struct cros_gpio *variant_cros_gpios(size_t *num);
+
+void variant_memory_params(struct mb_lpddr4x_cfg *bcfg);
+int variant_memory_sku(void);
+
+#endif /* __BASEBOARD_VARIANTS_H__ */
diff --git a/src/mainboard/google/volteer/variants/volteer/Makefile.inc b/src/mainboard/google/volteer/variants/volteer/Makefile.inc
new file mode 100644
index 0000000..ad968c7
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/volteer/Makefile.inc
@@ -0,0 +1,17 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright 2019 Google LLC
+##
+## 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.
+##
+
+## Memory Options
+SPD_SOURCES = samsung-K4U6E3S4AA-MGCL		# 0b0000
diff --git a/src/mainboard/google/volteer/variants/volteer/include/variant/acpi/dptf.asl b/src/mainboard/google/volteer/variants/volteer/include/variant/acpi/dptf.asl
new file mode 100644
index 0000000..4f6497a
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/volteer/include/variant/acpi/dptf.asl
@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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/acpi/dptf.asl>
diff --git a/src/mainboard/google/volteer/variants/volteer/include/variant/ec.h b/src/mainboard/google/volteer/variants/volteer/include/variant/ec.h
new file mode 100644
index 0000000..260d7d4
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/volteer/include/variant/ec.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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_EC_H
+#define MAINBOARD_EC_H
+
+#include <baseboard/ec.h>
+
+#endif
diff --git a/src/mainboard/google/volteer/variants/volteer/include/variant/gpio.h b/src/mainboard/google/volteer/variants/volteer/include/variant/gpio.h
new file mode 100644
index 0000000..750b0d4
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/volteer/include/variant/gpio.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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 <baseboard/gpio.h>
+
+#endif /* MAINBOARD_GPIO_H */
-- 
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I03a13f3df4e819ab9cf63ad69867c807d2a1b651
Gerrit-Change-Number: 38620
Gerrit-PatchSet: 1
Gerrit-Owner: Nick Vaccaro nvaccaro@google.com
Gerrit-MessageType: newchange



    