mb/google/skyrim: Create winterhold variant

Create the winterhold variant of the skyrim reference board by
copying the template files to a new directory named for the variant.

(Auto-Generated by create_coreboot_variant.sh version 4.5.0).

BUG=b:240970782
BRANCH=None
TEST=util/abuild/abuild -p none -t google/skyrim -x -a
make sure the build includes GOOGLE_WINTERHOLD

Signed-off-by: Isaac Lee <isaaclee@google.com>
Change-Id: I0e16f0a674aa3f4687cd82d5840a3c2087148a51
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66620
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/skyrim/Kconfig

@@ -65,6 +65,7 @@ config MAINBOARD_FAMILY
 
 config MAINBOARD_PART_NUMBER
 	default "Skyrim" if BOARD_GOOGLE_SKYRIM
+	default "Winterhold" if BOARD_GOOGLE_WINTERHOLD
 
 config OVERRIDE_DEVICETREE
 	string
@@ -73,6 +74,7 @@ config OVERRIDE_DEVICETREE
 config VARIANT_DIR
 	string
 	default "skyrim" if BOARD_GOOGLE_SKYRIM
+	default "winterhold" if BOARD_GOOGLE_WINTERHOLD
 
 config VBOOT
 	select VBOOT_LID_SWITCH

src/mainboard/google/skyrim/Kconfig.name

@@ -3,3 +3,7 @@ comment "Skyrim"
 config BOARD_GOOGLE_SKYRIM
 	bool "->  Skyrim"
 	select BOARD_GOOGLE_BASEBOARD_SKYRIM
+
+config BOARD_GOOGLE_WINTERHOLD
+	bool "->  Winterhold"
+	select BOARD_GOOGLE_BASEBOARD_SKYRIM

src/mainboard/google/skyrim/variants/winterhold/include/variant/ec.h

@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/ec.h>

src/mainboard/google/skyrim/variants/winterhold/overridetree.cb

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+chip soc/amd/mendocino
+
+	# I2C Config
+	#+-------------------+----------------------------+
+	#| Field             |  Value                     |
+	#+-------------------+----------------------------+
+	#| I2C0              | Trackpad                   |
+	#| I2C1              | Touchscreen                |
+	#| I2C2              | Speaker, Codec, P-SAR, USB |
+	#| I2C3              | D2 TPM                     |
+	#+-------------------+----------------------------+
+	register "i2c[0]" = "{
+		.speed = I2C_SPEED_FAST,
+	}"
+
+	register "i2c[1]" = "{
+		.speed = I2C_SPEED_FAST,
+	}"
+
+	register "i2c[2]" = "{
+		.speed = I2C_SPEED_FAST,
+	}"
+
+	register "i2c[3]" = "{
+		.speed = I2C_SPEED_FAST,
+		.early_init = true,
+	}"
+
+	device domain 0 on end
+end	# chip soc/amd/mendocino