mb/google/rex: Add MTL reference platform

This commit is a stub for rex, which is a an Intel Meteor Lake-P
reference platform.

BUG=b:224325352
TEST=util/abuild/abuild -p none -t google/rex -a -c max

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I46bd8d47b370cacbe0a09bbeaccacf7f1d51d8b6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62969
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rex/Kconfig

@@ -0,0 +1,34 @@
+config BOARD_GOOGLE_REX_COMMON
+	def_bool n
+	select BOARD_ROMSIZE_KB_32768
+	select HAVE_ACPI_TABLES
+
+config BOARD_GOOGLE_BASEBOARD_REX
+	def_bool n
+	select BOARD_GOOGLE_REX_COMMON
+	select SOC_INTEL_METEORLAKE
+	select SYSTEM_TYPE_LAPTOP
+
+config BOARD_GOOGLE_REX0
+	select BOARD_GOOGLE_BASEBOARD_REX
+
+if BOARD_GOOGLE_REX_COMMON
+
+config BASEBOARD_DIR
+	string
+	default "rex" if BOARD_GOOGLE_BASEBOARD_REX
+
+config DEVICETREE
+	default "variants/baseboard/\$(CONFIG_BASEBOARD_DIR)/devicetree.cb"
+
+config MAINBOARD_DIR
+	default "google/rex"
+
+config MAINBOARD_FAMILY
+	string
+	default "Google_Rex" if BOARD_GOOGLE_BASEBOARD_REX
+
+config MAINBOARD_PART_NUMBER
+	default "Rex" if BOARD_GOOGLE_REX0
+
+endif # BOARD_GOOGLE_REX_COMMON

src/mainboard/google/rex/Kconfig.name

@@ -0,0 +1,4 @@
+comment "Rex"
+
+config BOARD_GOOGLE_REX0
+	bool "-> Rex 0"

src/mainboard/google/rex/board_info.txt

@@ -0,0 +1,6 @@
+Vendor name: Google
+Board name: Rex
+Category: laptop
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y

src/mainboard/google/rex/dsdt.asl

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpi.h>
+
+DefinitionBlock(
+	"dsdt.aml",
+	"DSDT",
+	ACPI_DSDT_REV_2,
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x20110725	// OEM revision
+)
+{
+}

src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb

@@ -0,0 +1,5 @@
+chip soc/intel/meteorlake
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+end