mb/system76/kbl-u: Add System76 Galago Pro 3 Rev B

Change-Id: I25464d3a2dd02e613a8392db90b1eaf0f9b3ca70
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52217
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

29 files changed, 1445 insertions, 0 deletions

diff --git a/src/mainboard/system76/kbl-u/Kconfig b/src/mainboard/system76/kbl-u/Kconfig
new file mode 100644
index 000000000000..e4421d179abd
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/Kconfig
@@ -0,0 +1,60 @@
+if BOARD_SYSTEM76_GALP3_B
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select BOARD_ROMSIZE_KB_8192
+	select HAVE_ACPI_RESUME
+	select HAVE_ACPI_TABLES
+	select HAVE_CMOS_DEFAULT
+	select HAVE_OPTION_TABLE
+	select INTEL_GMA_HAVE_VBT
+	select INTEL_LPSS_UART_FOR_CONSOLE
+	select MAINBOARD_HAS_LPC_TPM
+	select MAINBOARD_HAS_TPM2
+	select NO_UART_ON_SUPERIO
+	select PCIEXP_HOTPLUG
+	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
+	select SOC_INTEL_KABYLAKE
+	select SPD_READ_BY_WORD
+	select SYSTEM_TYPE_LAPTOP
+
+config MAINBOARD_DIR
+	default "system76/kbl-u"
+
+config VARIANT_DIR
+	default "galp3-b" if BOARD_SYSTEM76_GALP3_B
+
+config MAINBOARD_PART_NUMBER
+	default "galp3-b" if BOARD_SYSTEM76_GALP3_B
+
+config MAINBOARD_SMBIOS_PRODUCT_NAME
+	default "Galago Pro"
+
+config MAINBOARD_VERSION
+	default "galp3-b" if BOARD_SYSTEM76_GALP3_B
+
+config CBFS_SIZE
+	default 0x600000
+
+config CONSOLE_POST
+	default y
+
+config ONBOARD_VGA_IS_PRIMARY
+	default y
+
+config UART_FOR_CONSOLE
+	default 2
+
+config DIMM_MAX
+	default 2
+
+config DIMM_SPD_SIZE
+	default 512
+
+config VGA_BIOS_ID
+	default "8086,5917" if BOARD_SYSTEM76_GALP3_B
+
+config POST_DEVICE
+	default n
+
+endif
diff --git a/src/mainboard/system76/kbl-u/Kconfig.name b/src/mainboard/system76/kbl-u/Kconfig.name
new file mode 100644
index 000000000000..8af68d880504
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/Kconfig.name
@@ -0,0 +1,2 @@
+config BOARD_SYSTEM76_GALP3_B
+	bool "galp3-b"
diff --git a/src/mainboard/system76/kbl-u/Makefile.inc b/src/mainboard/system76/kbl-u/Makefile.inc
new file mode 100644
index 000000000000..d749e412cce0
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/Makefile.inc
@@ -0,0 +1,8 @@
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
+
+bootblock-y += bootblock.c
+bootblock-y += gpio_early.c
+
+ramstage-y += ramstage.c
+ramstage-y += gpio.c
+ramstage-y += variants/$(VARIANT_DIR)/hda_verb.c
diff --git a/src/mainboard/system76/kbl-u/acpi/ac.asl b/src/mainboard/system76/kbl-u/acpi/ac.asl
new file mode 100644
index 000000000000..73266761980b
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/ac.asl
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (AC)
+{
+	Name (_HID, "ACPI0003" /* Power Source Device */)  // _HID: Hardware ID
+	Name (_PCL, Package (0x01)  // _PCL: Power Consumer List
+	{
+		_SB
+	})
+
+	Name (ACFG, One)
+
+	Method (_PSR, 0, NotSerialized)  // _PSR: Power Source
+	{
+		Return (ACFG)
+	}
+
+	Method (_STA, 0, NotSerialized)  // _STA: Status
+	{
+		Return (0x0F)
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/battery.asl b/src/mainboard/system76/kbl-u/acpi/battery.asl
new file mode 100644
index 000000000000..f3a8a9adb75b
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/battery.asl
@@ -0,0 +1,170 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (BAT0)
+{
+	Name (_HID, EisaId ("PNP0C0A") /* Control Method Battery */)  // _HID: Hardware ID
+	Name (_UID, Zero)  // _UID: Unique ID
+	Name (_PCL, Package (0x01)  // _PCL: Power Consumer List
+	{
+		_SB
+	})
+	Name (BFCC, Zero)
+	Method (_STA, 0, NotSerialized)  // _STA: Status
+	{
+		If (^^PCI0.LPCB.EC0.ECOK)
+		{
+			If (^^PCI0.LPCB.EC0.BAT0)
+			{
+				Return (0x1F)
+			}
+			Else
+			{
+				Return (0x0F)
+			}
+		}
+		Else
+		{
+			Return (0x0F)
+		}
+	}
+
+	Name (PBIF, Package (0x0D)
+	{
+		One, // 0 - Power Unit
+		0xFFFFFFFF, // 1 - Design Capacity
+		0xFFFFFFFF, // 2 - Last Full Charge Capacity
+		One, // 3 - Battery Technology
+		0x39D0, // 4 - Design Voltage
+		Zero, // 5 - Design Capacity of Warning
+		Zero, // 6 - Design Capacity of Low
+		0x40, // 7 - Battery Capacity Granularity 1
+		0x40, // 8 - Battery Capacity Granularity 2
+		"BAT", // 9 - Model Number
+		"0001", // 10 - Serial Number
+		"LION", // 11 - Battery Type
+		"Notebook" // 12 - OEM Information
+	})
+	Method (IVBI, 0, NotSerialized)
+	{
+		PBIF [1] = 0xFFFFFFFF
+		PBIF [2] = 0xFFFFFFFF
+		PBIF [4] = 0xFFFFFFFF
+		PBIF [9] = " "
+		PBIF [10] = " "
+		PBIF [11] = " "
+		PBIF [12] = " "
+		BFCC = Zero
+	}
+
+	Method (UPBI, 0, NotSerialized)
+	{
+		If (^^PCI0.LPCB.EC0.BAT0)
+		{
+			Local0 = (^^PCI0.LPCB.EC0.BDC0 & 0xFFFF)
+			PBIF [1] = Local0
+			Local0 = (^^PCI0.LPCB.EC0.BFC0 & 0xFFFF)
+			PBIF [2] = Local0
+			BFCC = Local0
+			Local0 = (^^PCI0.LPCB.EC0.BDV0 & 0xFFFF)
+			PBIF [4] = Local0
+			Local0 = (^^PCI0.LPCB.EC0.BCW0 & 0xFFFF)
+			PBIF [5] = Local0
+			Local0 = (^^PCI0.LPCB.EC0.BCL0 & 0xFFFF)
+			PBIF [6] = Local0
+			PBIF [9] = "BAT"
+			PBIF [10] = "0001"
+			PBIF [11] = "LION"
+			PBIF [12] = "Notebook"
+		}
+		Else
+		{
+			IVBI ()
+		}
+	}
+
+	Method (_BIF, 0, NotSerialized)  // _BIF: Battery Information
+	{
+		If (^^PCI0.LPCB.EC0.ECOK)
+		{
+			UPBI ()
+		}
+		Else
+		{
+			IVBI ()
+		}
+
+		Return (PBIF) /* \_SB_.BAT0.PBIF */
+	}
+
+	Name (PBST, Package (0x04)
+	{
+		Zero, // 0 - Battery state
+		0xFFFFFFFF, // 1 - Battery present rate
+		0xFFFFFFFF, // 2 - Battery remaining capacity
+		0x3D90 // 3 - Battery present voltage
+	})
+	Method (IVBS, 0, NotSerialized)
+	{
+		PBST [0] = Zero
+		PBST [1] = 0xFFFFFFFF
+		PBST [2] = 0xFFFFFFFF
+		PBST [3] = 0x2710
+	}
+
+	Method (UPBS, 0, NotSerialized)
+	{
+		If (^^PCI0.LPCB.EC0.BAT0)
+		{
+			Local0 = Zero
+			Local1 = Zero
+			If (^^AC.ACFG)
+			{
+				If (((^^PCI0.LPCB.EC0.BST0 & 0x02) == 0x02))
+				{
+					Local0 |= 0x02
+					Local1 = (^^PCI0.LPCB.EC0.BPR0 & 0xFFFF)
+				}
+			}
+			Else
+			{
+				Local0 |= One
+				Local1 = (^^PCI0.LPCB.EC0.BPR0 & 0xFFFF)
+			}
+
+			Local7 = (Local1 & 0x8000)
+			If ((Local7 == 0x8000))
+			{
+				Local1 ^= 0xFFFF
+			}
+
+			Local2 = (^^PCI0.LPCB.EC0.BRC0 & 0xFFFF)
+			Local3 = (^^PCI0.LPCB.EC0.BPV0 & 0xFFFF)
+			PBST [0] = Local0
+			PBST [1] = Local1
+			PBST [2] = Local2
+			PBST [3] = Local3
+			If ((BFCC != ^^PCI0.LPCB.EC0.BFC0))
+			{
+				Notify (BAT0, 0x81) // Information Change
+			}
+		}
+		Else
+		{
+			IVBS ()
+		}
+	}
+
+	Method (_BST, 0, NotSerialized)  // _BST: Battery Status
+	{
+		If (^^PCI0.LPCB.EC0.ECOK)
+		{
+			UPBS ()
+		}
+		Else
+		{
+			IVBS ()
+		}
+
+		Return (PBST) /* \_SB_.BAT0.PBST */
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/buttons.asl b/src/mainboard/system76/kbl-u/acpi/buttons.asl
new file mode 100644
index 000000000000..103c794595df
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/buttons.asl
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (PWRB)
+{
+	Name (_HID, EisaId ("PNP0C0C"))
+	Name (_PRW, Package () { 0x13 /* GPP_C19 */, 3 })
+}
+
+Device (SLPB)
+{
+	Name (_HID, EisaId ("PNP0C0E"))
+	Name (_PRW, Package () { 0x13 /* GPP_C19 */, 3 })
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/ec.asl b/src/mainboard/system76/kbl-u/acpi/ec.asl
new file mode 100644
index 000000000000..de25eca12904
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/ec.asl
@@ -0,0 +1,228 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (EC0)
+{
+	Name (_HID, EisaId ("PNP0C09") /* Embedded Controller Device */)  // _HID: Hardware ID
+	Name (_GPE, 0x50 /* GPP_E16 */)  // _GPE: General Purpose Events
+	Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource Settings
+	{
+		IO (Decode16,
+			0x0062,             // Range Minimum
+			0x0062,             // Range Maximum
+			0x00,               // Alignment
+			0x01,               // Length
+			)
+		IO (Decode16,
+			0x0066,             // Range Minimum
+			0x0066,             // Range Maximum
+			0x00,               // Alignment
+			0x01,               // Length
+			)
+	})
+
+	#include "acpi/ec_ram.asl"
+
+	Name (ECOK, Zero)
+	Method (_REG, 2, Serialized)  // _REG: Region Availability
+	{
+		Debug = Concatenate("EC: _REG", Concatenate(ToHexString(Arg0), Concatenate(" ", ToHexString(Arg1))))
+		If ((Arg0 == 0x03) && (Arg1 == One)) {
+			// Enable hardware touchpad lock, airplane mode, and keyboard backlight keys
+			ECOS = 1
+
+			// Enable software display brightness keys
+			WINF = 1
+
+			// Set current AC state
+			^^^^AC.ACFG = ADP
+			// Update battery information and status
+			^^^^BAT0.UPBI()
+			^^^^BAT0.UPBS()
+
+			// Notify of changes
+			Notify(^^^^AC, Zero)
+			Notify(^^^^BAT0, Zero)
+
+			PNOT ()
+
+			// EC is now available
+			ECOK = Arg1
+
+			// Reset System76 Device
+			^^^^S76D.RSET()
+		}
+	}
+
+	Name (S3OS, Zero)
+	Method (PTS, 1, Serialized) {
+		Debug = Concatenate("EC: PTS: ", ToHexString(Arg0))
+		If (ECOK) {
+			// Save ECOS during sleep
+			S3OS = ECOS
+
+			// Clear wake cause
+			WFNO = Zero
+		}
+	}
+
+	Method (WAK, 1, Serialized) {
+		Debug = Concatenate("EC: WAK: ", ToHexString(Arg0))
+		If (ECOK) {
+			// Restore ECOS after sleep
+			ECOS = S3OS
+
+			// Set current AC state
+			^^^^AC.ACFG = ADP
+
+			// Update battery information and status
+			^^^^BAT0.UPBI()
+			^^^^BAT0.UPBS()
+
+			// Notify of changes
+			Notify(^^^^AC, Zero)
+			Notify(^^^^BAT0, Zero)
+
+			// Reset System76 Device
+			^^^^S76D.RSET()
+		}
+	}
+
+	Method (_Q0A, 0, NotSerialized) // Touchpad Toggle
+	{
+		Debug = "EC: Touchpad Toggle"
+	}
+
+	Method (_Q0B, 0, NotSerialized) // Screen Toggle
+	{
+		Debug = "EC: Screen Toggle"
+	}
+
+	Method (_Q0C, 0, NotSerialized)  // Mute
+	{
+		Debug = "EC: Mute"
+	}
+
+	Method (_Q0D, 0, NotSerialized) // Keyboard Backlight
+	{
+		Debug = "EC: Keyboard Backlight"
+	}
+
+	Method (_Q0E, 0, NotSerialized) // Volume Down
+	{
+		Debug = "EC: Volume Down"
+	}
+
+	Method (_Q0F, 0, NotSerialized) // Volume Up
+	{
+		Debug = "EC: Volume Up"
+	}
+
+	Method (_Q10, 0, NotSerialized) // Switch Video Mode
+	{
+		Debug = "EC: Switch Video Mode"
+	}
+
+	Method (_Q11, 0, NotSerialized) // Brightness Down
+	{
+		Debug = "EC: Brightness Down"
+		if (^^^^HIDD.HRDY) {
+			^^^^HIDD.HPEM (20)
+		}
+	}
+
+	Method (_Q12, 0, NotSerialized) // Brightness Up
+	{
+		Debug = "EC: Brightness Up"
+		if (^^^^HIDD.HRDY) {
+			^^^^HIDD.HPEM (19)
+		}
+	}
+
+	Method (_Q13, 0, NotSerialized) // Camera Toggle
+	{
+		Debug = "EC: Camera Toggle"
+	}
+
+	Method (_Q14, 0, NotSerialized) // Airplane Mode
+	{
+		Debug = "EC: Airplane Mode"
+		if (^^^^HIDD.HRDY) {
+			^^^^HIDD.HPEM (8)
+		}
+		// TODO: hardware airplane mode
+	}
+
+	Method (_Q15, 0, NotSerialized) // Suspend Button
+	{
+		Debug = "EC: Suspend Button"
+		Notify (SLPB, 0x80)
+	}
+
+	Method (_Q16, 0, NotSerialized) // AC Detect
+	{
+		Debug = "EC: AC Detect"
+		^^^^AC.ACFG = ADP
+		Notify (AC, 0x80) // Status Change
+		If (BAT0)
+		{
+			Notify (^^^^BAT0, 0x81) // Information Change
+			Notify (^^^^BAT0, 0x80) // Status Change
+		}
+	}
+
+	Method (_Q17, 0, NotSerialized)  // BAT0 Update
+	{
+		Debug = "EC: BAT0 Update (17)"
+		Notify (^^^^BAT0, 0x81) // Information Change
+	}
+
+	Method (_Q19, 0, NotSerialized)  // BAT0 Update
+	{
+		Debug = "EC: BAT0 Update (19)"
+		Notify (^^^^BAT0, 0x81) // Information Change
+	}
+
+	Method (_Q1B, 0, NotSerialized) // Lid Close
+	{
+		Debug = "EC: Lid Close"
+		Notify (LID0, 0x80)
+	}
+
+	Method (_Q1C, 0, NotSerialized) // Thermal Trip
+	{
+		Debug = "EC: Thermal Trip"
+		/* TODO
+		Notify (\_TZ.TZ0, 0x81) // Thermal Trip Point Change
+		Notify (\_TZ.TZ0, 0x80) // Thermal Status Change
+		*/
+	}
+
+	Method (_Q1D, 0, NotSerialized) // Power Button
+	{
+		Debug = "EC: Power Button"
+		Notify (PWRB, 0x80)
+	}
+
+	Method (_Q50, 0, NotSerialized) // Other Events
+	{
+		Local0 = OEM4
+		If (Local0 == 0x8A) {
+			Debug = "EC: White Keyboard Backlight"
+			Notify (^^^^S76D, 0x80)
+		} ElseIf (Local0 == 0x9F) {
+			Debug = "EC: Color Keyboard Toggle"
+			Notify (^^^^S76D, 0x81)
+		} ElseIf (Local0 == 0x81) {
+			Debug = "EC: Color Keyboard Down"
+			Notify (^^^^S76D, 0x82)
+		} ElseIf (Local0 == 0x82) {
+			Debug = "EC: Color Keyboard Up"
+			Notify (^^^^S76D, 0x83)
+		} ElseIf (Local0 == 0x80) {
+			Debug = "EC: Color Keyboard Color Change"
+			Notify (^^^^S76D, 0x84)
+		} Else {
+			Debug = Concatenate("EC: Other: ", ToHexString(Local0))
+		}
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/ec_ram.asl b/src/mainboard/system76/kbl-u/acpi/ec_ram.asl
new file mode 100644
index 000000000000..0b6d27e0510d
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/ec_ram.asl
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+OperationRegion (ERAM, EmbeddedControl, Zero, 0xFF)
+Field (ERAM, ByteAcc, Lock, Preserve)
+{
+	NMSG, 8,
+	SLED, 4,
+	Offset (0x02),
+	MODE, 1,
+	FAN0, 1,
+	TME0, 1,
+	TME1, 1,
+	FAN1, 1,
+	, 2,
+	Offset (0x03),
+	LSTE, 1,	// Lid is open
+	LSW0, 1,
+	LWKE, 1,	// Lid wake
+	WAKF, 1,
+	,   2,
+	PWKE, 1,
+	MWKE, 1,
+	AC0, 8,
+	PSV, 8,
+	CRT, 8,
+	TMP, 8,
+	AC1, 8,
+	BBST, 8,
+	Offset (0x0B),
+	Offset (0x0C),
+	Offset (0x0D),
+	Offset (0x0E),
+	SLPT, 8,
+	SWEJ, 1,
+	SWCH, 1,
+	Offset (0x10),
+	ADP, 1,		// AC adapter connected
+	AFLT, 1,
+	BAT0, 1,
+	BAT1, 1,
+	, 3,
+	PWOF, 1,
+	WFNO, 8,	// Wake cause
+	BPU0, 32,
+	BDC0, 32,	// Battery design capacity
+	BFC0, 32,	// Battery full capacity
+	BTC0, 32,
+	BDV0, 32,	// Battery design voltage
+	BST0, 32,	// Battery status
+	BPR0, 32,	// Battery current
+	BRC0, 32,	// Battery remaining capacity
+	BPV0, 32,	// Battery voltage
+	BTP0, 16,
+	BRS0, 16,
+	BCW0, 32,
+	BCL0, 32,
+	BCG0, 32,
+	BG20, 32,
+	BMO0, 64,
+	BIF0, 64,
+	BSN0, 32,
+	BTY0, 64,
+	Offset (0x68),
+	ECOS, 8,	// Detected OS, 0 = no ACPI, 1 = ACPI but no driver, 2 = ACPI with driver
+	LNXD, 8,
+	ECPS, 8,
+	Offset (0x6C),
+	BTMP, 16,
+	EVTN, 8,
+	Offset (0x72),
+	PRCL, 8,
+	PRC0, 8,
+	PRC1, 8,
+	PRCM, 8,
+	PRIN, 8,
+	PSTE, 8,
+	PCAD, 8,
+	PEWL, 8,
+	PWRL, 8,
+	PECD, 8,
+	PEHI, 8,
+	PECI, 8,
+	PEPL, 8,
+	PEPM, 8,
+	PWFC, 8,
+	PECC, 8,
+	PDT0, 8,
+	PDT1, 8,
+	PDT2, 8,
+	PDT3, 8,
+	PRFC, 8,
+	PRS0, 8,
+	PRS1, 8,
+	PRS2, 8,
+	PRS3, 8,
+	PRS4, 8,
+	PRCS, 8,
+	PEC0, 8,
+	PEC1, 8,
+	PEC2, 8,
+	PEC3, 8,
+	CMDR, 8,
+	CVRT, 8,
+	GTVR, 8,
+	FANT, 8,
+	SKNT, 8,
+	AMBT, 8,
+	MCRT, 8,
+	DIM0, 8,
+	DIM1, 8,
+	PMAX, 8,
+	PPDT, 8,
+	PECH, 8,
+	PMDT, 8,
+	TSD0, 8,
+	TSD1, 8,
+	TSD2, 8,
+	TSD3, 8,
+	CPUP, 16,
+	MCHP, 16,
+	SYSP, 16,
+	CPAP, 16,
+	MCAP, 16,
+	SYAP, 16,
+	CFSP, 16,
+	CPUE, 16,
+	Offset (0xC6),
+	Offset (0xC7),
+	VGAT, 8,
+	OEM1, 8,
+	OEM2, 8,
+	OEM3, 16,
+	OEM4, 8,	// Extra SCI data
+	Offset (0xCE),
+	DUT1, 8,	// Fan 1 duty
+	DUT2, 8,	// Fan 2 duty
+	RPM1, 16,	// Fan 1 RPM
+	RPM2, 16,	// Fan 2 RPM
+	RPM4, 16,
+	Offset (0xD7),
+	DTHL, 8,
+	DTBP, 8,
+	AIRP, 8,	// Airplane mode LED
+	WINF, 8,	// Enable ACPI brightness controls
+	RINF, 8,
+	Offset (0xDD),
+	INF2, 8,
+	MUTE, 1,
+	Offset (0xE0),
+	RPM3, 16,
+	ECKS, 8,
+	Offset (0xE4),
+	, 4,
+	XTUF, 1,
+	EP12, 1,
+	Offset (0xE5),
+	INF3, 8,
+	Offset (0xE7),
+	GFOF, 8,
+	Offset (0xF0),
+	PL1T, 16,
+	PL2T, 16,
+	TAUT, 8,
+	Offset (0xF8),
+	FCMD, 8,
+	FDAT, 8,
+	FBUF, 8,
+	FBF1, 8,
+	FBF2, 8,
+	FBF3, 8,
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/gpe.asl b/src/mainboard/system76/kbl-u/acpi/gpe.asl
new file mode 100644
index 000000000000..b60a132f9c46
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/gpe.asl
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+// GPP_C19 SCI
+Method (_L13, 0, Serialized) {
+	Debug = Concatenate("GPE _L13: ", ToHexString(\_SB.PCI0.LPCB.EC0.WFNO))
+	If (\_SB.PCI0.LPCB.EC0.ECOK) {
+		If (\_SB.PCI0.LPCB.EC0.WFNO == 1) {
+			Notify(\_SB.LID0, 0x80)
+		}
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/hid.asl b/src/mainboard/system76/kbl-u/acpi/hid.asl
new file mode 100644
index 000000000000..6610c2e1bc2c
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/hid.asl
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (HIDD)
+{
+	Name (_HID, "INT33D5")
+	Name (HBSY, Zero)
+	Name (HIDX, Zero)
+	Name (HRDY, Zero)
+
+	Method (HDEM, 0, Serialized)
+	{
+		HBSY = Zero
+		Return (HIDX)
+	}
+
+	Method (HDMM, 0, Serialized)
+	{
+		Return (Zero)
+	}
+
+	Method (HDSM, 1, Serialized)
+	{
+		HRDY = Arg0
+	}
+
+	Method (HPEM, 1, Serialized)
+	{
+		HBSY = One
+		HIDX = Arg0
+
+		Notify (HIDD, 0xC0)
+		Local0 = Zero
+		While ((Local0 < 0xFA) && HBSY)
+		{
+			Sleep (0x04)
+			Local0++
+		}
+
+		If (HBSY == One)
+		{
+			HBSY = Zero
+			HIDX = Zero
+			Return (One)
+		}
+		Else
+		{
+			Return (Zero)
+		}
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/lid.asl b/src/mainboard/system76/kbl-u/acpi/lid.asl
new file mode 100644
index 000000000000..582c38d87c14
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/lid.asl
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (LID0)
+{
+	Name (_HID, EisaId ("PNP0C0D"))
+	Name (_PRW, Package () { 0x13 /* GPP_C19 */, 3 })
+
+	Method (_LID, 0, NotSerialized) {
+		DEBUG = "LID: _LID"
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			Return (^^PCI0.LPCB.EC0.LSTE)
+		} Else {
+			Return (One)
+		}
+	}
+
+	Method (_PSW, 1, NotSerialized) {
+		DEBUG = Concatenate("LID: _PSW: ", ToHexString(Arg0))
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			^^PCI0.LPCB.EC0.LWKE = Arg0
+		}
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/mainboard.asl b/src/mainboard/system76/kbl-u/acpi/mainboard.asl
new file mode 100644
index 000000000000..11735e8e0196
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/mainboard.asl
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Scope (\_SB) {
+	#include "ac.asl"
+	#include "battery.asl"
+	#include "buttons.asl"
+	#include "hid.asl"
+	#include "lid.asl"
+	#include "s76.asl"
+	#include "sleep.asl"
+}
+
+Scope (_GPE) {
+	#include "gpe.asl"
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/s76.asl b/src/mainboard/system76/kbl-u/acpi/s76.asl
new file mode 100644
index 000000000000..399e56973426
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/s76.asl
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+// Notifications:
+//   0x80 - hardware backlight toggle
+//   0x81 - backlight toggle
+//   0x82 - backlight down
+//   0x83 - backlight up
+//   0x84 - backlight color change
+Device (S76D) {
+	Name (_HID, "17761776")
+	Name (_UID, 0)
+
+	Method (RSET, 0, Serialized) {
+		Debug = "S76D: RSET"
+		SAPL(0)
+		SKBL(0)
+	}
+
+	Method (INIT, 0, Serialized) {
+		Debug = "S76D: INIT"
+		RSET()
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			// Set flags to use software control
+			^^PCI0.LPCB.EC0.ECOS = 2
+			Return (0)
+		} Else {
+			Return (1)
+		}
+	}
+
+	Method (FINI, 0, Serialized) {
+		Debug = "S76D: FINI"
+		RSET()
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			// Set flags to use hardware control
+			^^PCI0.LPCB.EC0.ECOS = 1
+			Return (0)
+		} Else {
+			Return (1)
+		}
+	}
+
+	// Get Airplane LED
+	Method (GAPL, 0, Serialized) {
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			If (^^PCI0.LPCB.EC0.AIRP & 0x40) {
+				Return (1)
+			}
+		}
+		Return (0)
+	}
+
+	// Set Airplane LED
+	Method (SAPL, 1, Serialized) {
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			If (Arg0) {
+				^^PCI0.LPCB.EC0.AIRP |= 0x40
+			} Else {
+				^^PCI0.LPCB.EC0.AIRP &= 0xBF
+			}
+		}
+	}
+
+	// Get KB LED
+	Method (GKBL, 0, Serialized) {
+		Local0 = 0
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			^^PCI0.LPCB.EC0.FDAT = One
+			^^PCI0.LPCB.EC0.FCMD = 0xCA
+			Local0 = ^^PCI0.LPCB.EC0.FBUF
+			^^PCI0.LPCB.EC0.FCMD = Zero
+		}
+		Return (Local0)
+	}
+
+	// Set KB Led
+	Method (SKBL, 1, Serialized) {
+		If (^^PCI0.LPCB.EC0.ECOK) {
+			^^PCI0.LPCB.EC0.FDAT = Zero
+			^^PCI0.LPCB.EC0.FBUF = Arg0
+			^^PCI0.LPCB.EC0.FCMD = 0xCA
+		}
+	}
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/sleep.asl b/src/mainboard/system76/kbl-u/acpi/sleep.asl
new file mode 100644
index 000000000000..48c50e075e30
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/sleep.asl
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Method called from _PTS prior to enter sleep state */
+Method (MPTS, 1) {
+	\_SB.PCI0.LPCB.EC0.PTS (Arg0)
+}
+
+/* Method called from _WAK prior to wakeup */
+Method (MWAK, 1) {
+	\_SB.PCI0.LPCB.EC0.WAK (Arg0)
+}
diff --git a/src/mainboard/system76/kbl-u/acpi/superio.asl b/src/mainboard/system76/kbl-u/acpi/superio.asl
new file mode 100644
index 000000000000..55b1db5b1137
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/superio.asl
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/pc80/pc/ps2_controller.asl>
diff --git a/src/mainboard/system76/kbl-u/board_info.txt b/src/mainboard/system76/kbl-u/board_info.txt
new file mode 100644
index 000000000000..56e98a39e328
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/board_info.txt
@@ -0,0 +1,8 @@
+Vendor name: System76
+Board name: kbl-u
+Category: laptop
+Release year: 2018
+ROM package: SOIC-8
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
diff --git a/src/mainboard/system76/kbl-u/bootblock.c b/src/mainboard/system76/kbl-u/bootblock.c
new file mode 100644
index 000000000000..8d06adc9d7f7
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/bootblock.c
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <mainboard/gpio.h>
+
+void bootblock_mainboard_early_init(void)
+{
+	mainboard_configure_early_gpios();
+}
diff --git a/src/mainboard/system76/kbl-u/cmos.default b/src/mainboard/system76/kbl-u/cmos.default
new file mode 100644
index 000000000000..06b04332a25d
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/cmos.default
@@ -0,0 +1,2 @@
+boot_option=Fallback
+debug_level=Debug
diff --git a/src/mainboard/system76/kbl-u/cmos.layout b/src/mainboard/system76/kbl-u/cmos.layout
new file mode 100644
index 000000000000..ac817525dd53
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/cmos.layout
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+entries
+
+0	384	r	0	reserved_memory
+
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384	1	e	4	boot_option
+388	4	h	0	reboot_counter
+
+# RTC_CLK_ALTCENTURY
+400	8	r	0	century
+
+412	4	e	6	debug_level
+984	16	h	0	check_sum
+
+enumerations
+
+4	0	Fallback
+4	1	Normal
+
+6	0	Emergency
+6	1	Alert
+6	2	Critical
+6	3	Error
+6	4	Warning
+6	5	Notice
+6	6	Info
+6	7	Debug
+6	8	Spew
+
+checksums
+
+checksum 408 983 984
diff --git a/src/mainboard/system76/kbl-u/devicetree.cb b/src/mainboard/system76/kbl-u/devicetree.cb
new file mode 100644
index 000000000000..6322394ac1df
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/devicetree.cb
@@ -0,0 +1,191 @@
+chip soc/intel/skylake
+	# Send an extra VR mailbox command for the PS4 exit issue
+	register "SendVrMbxCmd" = "2"
+
+	# Power limit
+	register "power_limits_config" = "{
+		.tdp_pl1_override = 20,
+		.tdp_pl2_override = 30,
+	}"
+
+	# Enable Enhanced Intel SpeedStep
+	register "eist_enable" = "1"
+
+	# Serial I/O
+	register "SerialIoDevMode" = "{
+		[PchSerialIoIndexUart2] = PchSerialIoSkipInit, // LPSS UART
+	}"
+
+	# Serial IRQ
+	register "serirq_mode" = "SERIRQ_CONTINUOUS"
+
+	# Power
+	register "PmConfigSlpS3MinAssert" = "2"		# 50ms
+	register "PmConfigSlpS4MinAssert" = "1"		# 1s
+	register "PmConfigSlpSusMinAssert" = "3"	# 500ms
+	register "PmConfigSlpAMinAssert" = "3"		# 2s
+
+	# FSP Configuration
+	register "SkipExtGfxScan" = "1"
+	register "SaGv" = "SaGv_Enabled"
+
+	# VR Settings Configuration for 4 Domains
+	#+----------------+-----------+-----------+-------------+----------+
+	#| Domain/Setting |     SA    |    IA     | GT Unsliced |    GT    |
+	#+----------------+-----------+-----------+-------------+----------+
+	#| Psi1Threshold  | 20A       | 20A       | 20A         | 20A      |
+	#| Psi2Threshold  | 4A        | 5A        | 5A          | 5A       |
+	#| Psi3Threshold  | 1A        | 1A        | 1A          | 1A       |
+	#| Psi3Enable     | 1         | 1         | 1           | 1        |
+	#| Psi4Enable     | 1         | 1         | 1           | 1        |
+	#| ImonSlope      | 0         | 0         | 0           | 0        |
+	#| ImonOffset     | 0         | 0         | 0           | 0        |
+	#| IccMax         | 5A        | 64A       | 31A         | 31A      |
+	#| VrVoltageLimit | 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 = 0,
+		.psi4enable = 0,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(5),
+		.voltage_limit = 1520,
+		.ac_loadline = 1030,
+		.dc_loadline = 1030,
+	}"
+
+	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 = 0,
+		.psi4enable = 0,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(64),
+		.voltage_limit = 1520,
+		.ac_loadline = 240,
+		.dc_loadline = 240,
+	}"
+
+	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 = 0,
+		.psi4enable = 0,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(31),
+		.voltage_limit = 1520,
+		.ac_loadline = 310,
+		.dc_loadline = 310,
+	}"
+
+	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 = 0,
+		.psi4enable = 0,
+		.imon_slope = 0x0,
+		.imon_offset = 0x0,
+		.icc_max = VR_CFG_AMP(31),
+		.voltage_limit = 1520,
+		.ac_loadline = 310,
+		.dc_loadline = 310,
+	}"
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+
+	device domain 0 on
+		device ref system_agent on end
+		device ref igpu on end
+		device ref sa_thermal on end
+		device ref south_xhci on
+			# USB2
+			register "usb2_ports[0]" = "USB2_PORT_MID(OC_SKIP)"         # Type-A port right
+			register "usb2_ports[1]" = "USB2_PORT_FLEX(OC_SKIP)"        # 3G / LTE
+			register "usb2_ports[2]" = "USB2_PORT_TYPE_C(OC_SKIP)"      # Type-C port right
+			register "usb2_ports[3]" = "USB2_PORT_FLEX(OC_SKIP)"        # Camera
+			register "usb2_ports[4]" = "USB2_PORT_FLEX(OC_SKIP)"        # Bluetooth
+			register "usb2_ports[6]" = "USB2_PORT_FLEX(OC_SKIP)"        # Type-A port left
+			register "usb2_ports[7]" = "USB2_PORT_TYPE_C(OC_SKIP)"      # Type-C port right
+			# USB3
+			register "usb3_ports[0]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # Type-A port right
+			register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # 4G
+			register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # Type C port right
+			register "usb3_ports[3]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # Type-A port left
+		end
+		device ref thermal on end
+		device ref sata on
+			register "SataSalpSupport" = "0"
+			register "SataPortsEnable[0]" = "1"
+			register "SataPortsEnable[2]" = "1"
+			register "SataSpeedLimit" = "2"
+		end
+		device ref pcie_rp1 on
+			# Root port #1 x4 (TBT)
+			register "PcieRpEnable[0]" = "1"
+			register "PcieRpClkReqSupport[0]" = "1"
+			register "PcieRpClkReqNumber[0]" = "4"
+			register "PcieRpClkSrcNumber[0]" = "4"
+			register "PcieRpAdvancedErrorReporting[0]" = "1"
+			register "PcieRpLtrEnable[0]" = "1"
+			register "PcieRpHotPlug[0]" = "1"
+		end
+		device ref pcie_rp5 on
+			# Root port #5 x1 (LAN)
+			register "PcieRpEnable[4]" = "1"
+			register "PcieRpClkReqSupport[4]" = "1"
+			register "PcieRpClkReqNumber[4]" = "3"
+			register "PcieRpClkSrcNumber[4]" = "3"
+			register "PcieRpAdvancedErrorReporting[4]" = "1"
+			register "PcieRpLtrEnable[4]" = "1"
+		end
+		device ref pcie_rp6 on
+			# Root port #6 x1 (WLAN)
+			register "PcieRpEnable[5]" = "1"
+			register "PcieRpClkReqSupport[5]" = "1"
+			register "PcieRpClkReqNumber[5]" = "2"
+			register "PcieRpClkSrcNumber[5]" = "2"
+			register "PcieRpAdvancedErrorReporting[5]" = "1"
+			register "PcieRpLtrEnable[5]" = "1"
+		end
+		device ref pcie_rp9 on
+			# Root port #9 x4 (NVMe)
+			register "PcieRpEnable[8]" = "1"
+			register "PcieRpClkReqSupport[8]" = "1"
+			register "PcieRpClkReqNumber[8]" = "5"
+			register "PcieRpClkSrcNumber[8]" = "5"
+			register "PcieRpAdvancedErrorReporting[8]" = "1"
+			register "PcieRpLtrEnable[8]" = "1"
+		end
+		device ref lpc_espi on
+			register "gen1_dec" = "0x000c0681"
+			register "gen2_dec" = "0x000c1641"
+			register "gen3_dec" = "0x00040069"
+			chip drivers/pc80/tpm
+				device pnp 0c31.0 on end
+			end
+		end
+		device ref p2sb off end
+		device ref pmc on
+			register "gpe0_dw0" = "GPP_C"
+			register "gpe0_dw1" = "GPP_D"
+			register "gpe0_dw2" = "GPP_E"
+		end
+		device ref hda on end
+		device ref smbus on end
+		device ref fast_spi on end
+	end
+end
diff --git a/src/mainboard/system76/kbl-u/dsdt.asl b/src/mainboard/system76/kbl-u/dsdt.asl
new file mode 100644
index 000000000000..f93c3f68a807
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/dsdt.asl
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+DefinitionBlock(
+	"dsdt.aml",
+	"DSDT",
+	ACPI_DSDT_REV_2,
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x20110725
+)
+{
+	#include <acpi/dsdt_top.asl>
+	#include <soc/intel/common/block/acpi/acpi/platform.asl>
+	#include <soc/intel/common/block/acpi/acpi/globalnvs.asl>
+	#include <cpu/intel/common/acpi/cpu.asl>
+
+	Device (\_SB.PCI0)
+	{
+		#include <soc/intel/skylake/acpi/systemagent.asl>
+		#include <soc/intel/skylake/acpi/pch.asl>
+	}
+
+	#include <southbridge/intel/common/acpi/sleepstates.asl>
+
+	#include "acpi/mainboard.asl"
+}
diff --git a/src/mainboard/system76/kbl-u/gpio.c b/src/mainboard/system76/kbl-u/gpio.c
new file mode 100644
index 000000000000..5c5662e1fcca
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/gpio.c
@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <mainboard/gpio.h>
+#include <soc/gpio.h>
+
+static const struct pad_config gpio_table[] = {
+	/* ------- GPIO Group GPD ------- */
+	PAD_NC(GPD0, NONE), // PM_BATLOW#
+	PAD_CFG_NF(GPD1, NONE, DEEP, NF1), // AC_PRESENT
+	_PAD_CFG_STRUCT(GPD2, 0x880500, 0x0), // LAN_WAKEUP#
+	PAD_CFG_NF(GPD3, UP_20K, DEEP, NF1), // PWR_BTN#
+	PAD_CFG_NF(GPD4, NONE, DEEP, NF1), // SUSB#_PCH
+	PAD_CFG_NF(GPD5, NONE, DEEP, NF1), // SUSC#_PCH
+	PAD_CFG_NF(GPD6, NONE, DEEP, NF1), // SLP_A#
+	PAD_NC(GPD7, NONE),
+	PAD_CFG_NF(GPD8, NONE, DEEP, NF1), // SUSCLK
+	PAD_CFG_NF(GPD9, NONE, DEEP, NF1), // PCH_SLP_WLAN#
+	PAD_NC(GPD10, NONE), // SLP_S5#
+	PAD_NC(GPD11, NONE), // PCH_GPD11
+
+	/* ------- GPIO Group A ------- */
+	PAD_CFG_NF(GPP_A0, NONE, DEEP, NF1), // SB_KBCRST#
+	PAD_CFG_NF(GPP_A1, NONE, DEEP, NF1), // LPC_AD0
+	PAD_CFG_NF(GPP_A2, NONE, DEEP, NF1), // LPC_AD1
+	PAD_CFG_NF(GPP_A3, NONE, DEEP, NF1), // LPC_AD2
+	PAD_CFG_NF(GPP_A4, NONE, DEEP, NF1), // LPC_AD3
+	PAD_CFG_NF(GPP_A5, NONE, DEEP, NF1), // LPC_FRAME#
+	PAD_CFG_NF(GPP_A6, NONE, DEEP, NF1), // SERIRQ
+	PAD_NC(GPP_A7, NONE), // G_INT1
+	PAD_CFG_NF(GPP_A8, NONE, DEEP, NF1), // PM_CLKRUN#
+	PAD_CFG_NF(GPP_A9, NONE, DEEP, NF1), // PCLK_KBC
+	PAD_CFG_NF(GPP_A10, NONE, DEEP, NF1), // PCLK_TPM
+	PAD_CFG_NF(GPP_A11, NONE, DEEP, NF1), // LAN_WAKEUP#
+	PAD_NC(GPP_A12, NONE), // PCH_GPP_A12
+	PAD_CFG_NF(GPP_A13, NONE, DEEP, NF1), // SUSWARN#
+	PAD_CFG_NF(GPP_A14, NONE, DEEP, NF1), // S4_STATE#
+	PAD_CFG_NF(GPP_A15, NONE, DEEP, NF1), // SUSACK#
+	PAD_NC(GPP_A16, NONE),
+	PAD_NC(GPP_A17, NONE),
+	PAD_CFG_GPO(GPP_A18, 1, DEEP), // TBTA_ACE_GPIO3
+	PAD_CFG_GPO(GPP_A19, 1, DEEP), // SATA_PWR_EN
+	PAD_CFG_GPO(GPP_A20, 0, DEEP), // TBTA_ACE_GPIO0
+	PAD_CFG_GPO(GPP_A21, 1, PLTRST), // TBT_FRC_PWR
+	PAD_CFG_GPO(GPP_A22, 0, PWROK), // PS8338B_SW
+	PAD_CFG_GPO(GPP_A23, 0, PWROK), // PS8338B_PCH
+
+	/* ------- GPIO Group B ------- */
+	PAD_CFG_NF(GPP_B0, NONE, DEEP, NF1), // CORE_VID0
+	PAD_CFG_NF(GPP_B1, NONE, DEEP, NF1), // CORE_VID1
+	PAD_NC(GPP_B2, NONE), // VRALERT#
+	PAD_NC(GPP_B3, NONE),
+	PAD_NC(GPP_B4, NONE),
+	PAD_NC(GPP_B5, NONE), // PCIECLKRQ0#
+	PAD_NC(GPP_B6, NONE), // PCIECLKRQ1#
+	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), // WLAN_CLKREQ#
+	PAD_CFG_NF(GPP_B8, NONE, DEEP, NF1), // LAN_CLKREQ#
+	PAD_CFG_NF(GPP_B9, NONE, DEEP, NF1), // TBT_CLKREQ#
+	PAD_CFG_NF(GPP_B10, NONE, DEEP, NF1), // SSD_CLKREQ#
+	PAD_NC(GPP_B11, NONE),
+	PAD_NC(GPP_B12, NONE), // SLP_S0#
+	PAD_CFG_NF(GPP_B13, NONE, DEEP, NF1), // PLTRST#
+	PAD_CFG_NF(GPP_B14, NONE, DEEP, NF1), // PCH_SPKR
+	PAD_NC(GPP_B15, NONE), // PCH_GPP_B15
+	PAD_NC(GPP_B16, NONE), // PCH_GPP_B16
+	PAD_NC(GPP_B17, NONE), // PCH_GPP_B17
+	PAD_NC(GPP_B18, NONE), // GSPI0_BBS0 - No Reboot strap
+	PAD_NC(GPP_B19, NONE), // PCH_GPP_B19
+	PAD_NC(GPP_B20, NONE), // PCH_GPP_B20
+	PAD_NC(GPP_B21, NONE), // PCH_GPP_B21
+	PAD_NC(GPP_B22, NONE), // PCH_GPP_B22 - Boot BIOS strap
+	PAD_NC(GPP_B23, NONE), // PCH_GPP_B23
+
+	/* ------- GPIO Group C ------- */
+	PAD_CFG_NF(GPP_C0, NONE, DEEP, NF1), // SMB_CLK
+	PAD_CFG_NF(GPP_C1, NONE, DEEP, NF1), // SMB_DATA
+	PAD_NC(GPP_C2, NONE), // PCH_GPP_C2
+	PAD_NC(GPP_C3, NONE), // SML0CLK
+	PAD_NC(GPP_C4, NONE), // SML0DATA
+	PAD_NC(GPP_C5, NONE), // PCH_GPP_C5
+	PAD_NC(GPP_C6, NONE), // SML1CLK
+	PAD_NC(GPP_C7, NONE), // SML1DATA
+	PAD_NC(GPP_C8, NONE),
+	PAD_NC(GPP_C9, NONE),
+	PAD_NC(GPP_C10, NONE),
+	PAD_NC(GPP_C11, NONE),
+	PAD_NC(GPP_C12, NONE), // TBTA_ACE_GPIO2
+	_PAD_CFG_STRUCT(GPP_C13, 0x82880100, 0x0000), // TBCIO_PLUG_EVENT
+	PAD_NC(GPP_C14, NONE), // TBTA_MRESET
+	PAD_NC(GPP_C15, NONE), // TBTA_ACE_GPIO7
+	PAD_NC(GPP_C16, NONE), // T_SDA
+	PAD_NC(GPP_C17, NONE), // T_SCL
+	PAD_NC(GPP_C18, NONE),
+	_PAD_CFG_STRUCT(GPP_C19, 0x40880100, 0x0000), // SWI#
+	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1), // UART2_RXD
+	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), // UART2_TXD
+	PAD_NC(GPP_C22, NONE), // UEART2_RTS_N
+	PAD_NC(GPP_C23, NONE), // UART2_CTS_N
+
+	/* ------- GPIO Group D ------- */
+	PAD_NC(GPP_D0, NONE),
+	PAD_NC(GPP_D1, NONE),
+	PAD_NC(GPP_D2, NONE),
+	PAD_NC(GPP_D3, NONE),
+	PAD_NC(GPP_D4, NONE), // PCH_GPP_D4
+	PAD_NC(GPP_D5, NONE),
+	PAD_NC(GPP_D6, NONE),
+	PAD_NC(GPP_D7, NONE),
+	PAD_CFG_GPO(GPP_D8, 1, DEEP), // SB_BLON
+	PAD_NC(GPP_D9, NONE), // T_INT
+	PAD_NC(GPP_D10, NONE), // EDP_DET
+	PAD_NC(GPP_D11, NONE),
+	PAD_NC(GPP_D12, NONE),
+	PAD_NC(GPP_D13, NONE),
+	PAD_NC(GPP_D14, NONE),
+	PAD_NC(GPP_D15, NONE),
+	PAD_NC(GPP_D16, NONE),
+	PAD_NC(GPP_D17, NONE),
+	PAD_NC(GPP_D18, NONE),
+	PAD_NC(GPP_D19, NONE),
+	PAD_NC(GPP_D20, NONE),
+	PAD_CFG_GPI(GPP_D21, NONE, DEEP), // TPM_DET#
+	PAD_NC(GPP_D22, NONE),
+	PAD_NC(GPP_D23, NONE),
+
+	/* ------- GPIO Group E ------- */
+	PAD_NC(GPP_E0, NONE), // PCH_GPP_E0
+	PAD_NC(GPP_E1, NONE), // SATA_ODD_PRSNT#
+	PAD_CFG_NF(GPP_E2, NONE, DEEP, NF1), // SATAGP2
+	PAD_NC(GPP_E3, NONE),
+	PAD_NC(GPP_E4, NONE), // DEVSLP0
+	PAD_NC(GPP_E5, NONE), // DEVSLP1
+	PAD_CFG_NF(GPP_E6, NONE, DEEP, NF1), // DEVSLP2
+	PAD_NC(GPP_E7, NONE),
+	PAD_CFG_NF(GPP_E8, NONE, DEEP, NF1), // PCH_SATA_LED#
+	PAD_NC(GPP_E9, NONE), // USB_OC#12
+	PAD_NC(GPP_E10, NONE), // USB_OC#34
+	PAD_NC(GPP_E11, NONE), // USB_OC#56
+	PAD_NC(GPP_E12, NONE), // USB_OC#78
+	PAD_CFG_NF(GPP_E13, NONE, DEEP, NF1), // MUX_HPD
+	PAD_CFG_NF(GPP_E14, NONE, DEEP, NF1), // HDMI_HPD
+	_PAD_CFG_STRUCT(GPP_E15, 0x42840100, 0x0), // SMI#
+	PAD_CFG_GPI_SCI_LOW(GPP_E16, NONE, DEEP, LEVEL), // SCI#
+	PAD_CFG_NF(GPP_E17, NONE, DEEP, NF1), // EDP_HPD
+	PAD_CFG_NF(GPP_E18, NONE, DEEP, NF1), // MDP_CTRLCLK
+	PAD_CFG_NF(GPP_E19, DN_20K, DEEP, NF1), // MDP_CTRLDATA
+	PAD_CFG_NF(GPP_E20, NONE, DEEP, NF1), // HDMI_CTRLCLK
+	PAD_CFG_NF(GPP_E21, DN_20K, DEEP, NF1), // HDMI_CTRLDATA
+	PAD_NC(GPP_E22, NONE),
+	PAD_NC(GPP_E23, NONE),
+
+	/* ------- GPIO Group F ------- */
+	PAD_NC(GPP_F0, NONE),
+	PAD_NC(GPP_F1, NONE),
+	PAD_NC(GPP_F2, NONE),
+	PAD_NC(GPP_F3, NONE),
+	PAD_NC(GPP_F4, NONE),
+	PAD_NC(GPP_F5, NONE),
+	PAD_NC(GPP_F6, NONE),
+	PAD_NC(GPP_F7, NONE),
+	PAD_NC(GPP_F8, NONE),
+	PAD_NC(GPP_F9, NONE),
+	PAD_NC(GPP_F10, NONE),
+	PAD_NC(GPP_F11, NONE),
+	PAD_NC(GPP_F12, NONE),
+	PAD_NC(GPP_F13, NONE),
+	PAD_NC(GPP_F14, NONE),
+	PAD_NC(GPP_F15, NONE),
+	PAD_NC(GPP_F16, NONE),
+	PAD_NC(GPP_F17, NONE),
+	PAD_NC(GPP_F18, NONE),
+	PAD_NC(GPP_F19, NONE),
+	PAD_NC(GPP_F20, NONE),
+	PAD_NC(GPP_F21, NONE),
+	PAD_NC(GPP_F22, NONE),
+	PAD_NC(GPP_F23, NONE), // LIGHT_KB_DET#
+
+	/* ------- GPIO Group G ------- */
+	PAD_NC(GPP_G0, NONE),
+	PAD_CFG_GPI(GPP_G1, NONE, DEEP), // TBT Detect
+	PAD_NC(GPP_G2, NONE),
+	PAD_NC(GPP_G3, NONE), // ASM1543_I_SEL0
+	PAD_NC(GPP_G4, NONE), // ASM1543_I_SEL1
+	PAD_NC(GPP_G5, NONE),
+	PAD_NC(GPP_G6, NONE),
+	PAD_NC(GPP_G7, NONE),
+};
+
+void mainboard_configure_gpios(void)
+{
+	gpio_configure_pads(gpio_table, ARRAY_SIZE(gpio_table));
+}
diff --git a/src/mainboard/system76/kbl-u/gpio_early.c b/src/mainboard/system76/kbl-u/gpio_early.c
new file mode 100644
index 000000000000..80f37c65535e
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/gpio_early.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <mainboard/gpio.h>
+#include <soc/gpio.h>
+
+static const struct pad_config early_gpio_table[] = {
+	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1), // UART2_RXD
+	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), // UART2_TXD
+};
+
+void mainboard_configure_early_gpios(void)
+{
+	gpio_configure_pads(early_gpio_table, ARRAY_SIZE(early_gpio_table));
+}
diff --git a/src/mainboard/system76/kbl-u/include/mainboard/gpio.h b/src/mainboard/system76/kbl-u/include/mainboard/gpio.h
new file mode 100644
index 000000000000..c6393beebb6d
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/include/mainboard/gpio.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+void mainboard_configure_early_gpios(void);
+void mainboard_configure_gpios(void);
+
+#endif
diff --git a/src/mainboard/system76/kbl-u/ramstage.c b/src/mainboard/system76/kbl-u/ramstage.c
new file mode 100644
index 000000000000..43ee54f50a5f
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/ramstage.c
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/device.h>
+#include <mainboard/gpio.h>
+
+static void mainboard_init(void *chip_info)
+{
+	mainboard_configure_gpios();
+}
+
+struct chip_operations mainboard_ops = {
+	.init = mainboard_init,
+};
diff --git a/src/mainboard/system76/kbl-u/romstage.c b/src/mainboard/system76/kbl-u/romstage.c
new file mode 100644
index 000000000000..c55978e05fd4
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/romstage.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/romstage.h>
+#include <spd_bin.h>
+#include <string.h>
+
+static void mainboard_fill_rcomp_res_data(void *rcomp_ptr)
+{
+	const u16 RcompResistor[3] = {121, 81, 100};
+	memcpy(rcomp_ptr, RcompResistor, sizeof(RcompResistor));
+}
+
+static void mainboard_fill_rcomp_strength_data(void *rcomp_strength_ptr)
+{
+	const u16 RcompTarget[5] = {100, 40, 20, 20, 26};
+	memcpy(rcomp_strength_ptr, RcompTarget, sizeof(RcompTarget));
+}
+
+void mainboard_memory_init_params(FSPM_UPD *mupd)
+{
+	FSP_M_CONFIG *mem_cfg = &mupd->FspmConfig;
+
+	struct spd_block blk = {
+		.addr_map = {0x50, 0x52},
+	};
+
+	get_spd_smbus(&blk);
+	dump_spd_info(&blk);
+
+	mainboard_fill_rcomp_res_data(&mem_cfg->RcompResistor);
+	mainboard_fill_rcomp_strength_data(&mem_cfg->RcompTarget);
+
+	mem_cfg->DqPinsInterleaved = TRUE;
+	mem_cfg->CaVrefConfig = 2;
+	mem_cfg->MemorySpdDataLen = blk.len;
+	mem_cfg->MemorySpdPtr00 = (uintptr_t)blk.spd_array[0];
+	mem_cfg->MemorySpdPtr10 = (uintptr_t)blk.spd_array[1];
+}
diff --git a/src/mainboard/system76/kbl-u/variants/galp3-b/data.vbt b/src/mainboard/system76/kbl-u/variants/galp3-b/data.vbt
new file mode 100644
index 000000000000..92bd9813dc7a
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/variants/galp3-b/data.vbt
diff --git a/src/mainboard/system76/kbl-u/variants/galp3-b/hda_verb.c b/src/mainboard/system76/kbl-u/variants/galp3-b/hda_verb.c
new file mode 100644
index 000000000000..a7c927f82a0f
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/variants/galp3-b/hda_verb.c
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	/* Realtek, ALC269VC */
+	0x10ec0269, /* Vendor ID */
+	0x15581414, /* Subsystem ID */
+	11, /* Number of entries */
+	AZALIA_SUBVENDOR(0, 0x15581414),
+	AZALIA_PIN_CFG(0, 0x12, 0x90a60140),
+	AZALIA_PIN_CFG(0, 0x14, 0x90170120),
+	AZALIA_PIN_CFG(0, 0x15, 0x02211010),
+	AZALIA_PIN_CFG(0, 0x17, 0x40000000),
+	AZALIA_PIN_CFG(0, 0x18, 0x02a11030),
+	AZALIA_PIN_CFG(0, 0x19, 0x411111f0),
+	AZALIA_PIN_CFG(0, 0x1a, 0x411111f0),
+	AZALIA_PIN_CFG(0, 0x1b, 0x411111f0),
+	AZALIA_PIN_CFG(0, 0x1d, 0x40f4a205),
+	AZALIA_PIN_CFG(0, 0x1e, 0x411111f0),
+	/* Intel, KabylakeHDMI */
+	0x8086280b, /* Vendor ID */
+	0x80860101, /* Subsystem ID */
+	4, /* Number of entries */
+	AZALIA_SUBVENDOR(2, 0x80860101),
+	AZALIA_PIN_CFG(2, 0x05, 0x18560010),
+	AZALIA_PIN_CFG(2, 0x06, 0x18560010),
+	AZALIA_PIN_CFG(2, 0x07, 0x18560010),
+};
+
+const u32 pc_beep_verbs[] = {};
+
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/system76/kbl-u/variants/galp3-b/overridetree.cb b/src/mainboard/system76/kbl-u/variants/galp3-b/overridetree.cb
new file mode 100644
index 000000000000..134fbec7a7d8
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/variants/galp3-b/overridetree.cb
@@ -0,0 +1,5 @@
+chip soc/intel/skylake
+	device domain 0 on
+		subsystemid 0x1558 0x1413 inherit
+	end
+end