volteer: Create halvor variant

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

BUG=b:151399850
BRANCH=None
TEST=util/abuild/abuild -p none -t google/volteer -x -a
make sure the build includes GOOGLE_HALVOR

Signed-off-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Change-Id: If4d3417ba55d56af441c99d949a196328d7a1951
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39667
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>

src/mainboard/google/volteer/Kconfig

@@ -55,6 +55,7 @@ config MAINBOARD_FAMILY
 
 config MAINBOARD_PART_NUMBER
 	string
+	default "Halvor" if BOARD_GOOGLE_HALVOR
 	default "Ripto" if BOARD_GOOGLE_RIPTO
 	default "Volteer" if BOARD_GOOGLE_VOLTEER
 
@@ -68,6 +69,7 @@ config TPM_TIS_ACPI_INTERRUPT
 
 config VARIANT_DIR
 	string
+	default "halvor" if BOARD_GOOGLE_HALVOR
 	default "ripto" if BOARD_GOOGLE_RIPTO
 	default "volteer" if BOARD_GOOGLE_VOLTEER
 

src/mainboard/google/volteer/Kconfig.name

@@ -1,9 +1,13 @@
 comment "Volteer"
 
-config BOARD_GOOGLE_VOLTEER
-	bool "-> Volteer"
+config BOARD_GOOGLE_HALVOR
+	bool "-> Halvor"
 	select BOARD_GOOGLE_BASEBOARD_VOLTEER
 
 config BOARD_GOOGLE_RIPTO
 	bool "-> Ripto"
 	select BOARD_GOOGLE_BASEBOARD_VOLTEER
+
+config BOARD_GOOGLE_VOLTEER
+	bool "-> Volteer"
+	select BOARD_GOOGLE_BASEBOARD_VOLTEER

src/mainboard/google/volteer/variants/halvor/Makefile.inc

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# This file is part of the coreboot project.
+
+SPD_SOURCES =
+
+bootblock-y += gpio.c
+
+ramstage-y += gpio.c

src/mainboard/google/volteer/variants/halvor/gpio.c

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <commonlib/helpers.h>
+
+/* Pad configuration in ramstage */
+static const struct pad_config gpio_table[] = {
+
+};
+
+const struct pad_config *variant_base_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(gpio_table);
+	return gpio_table;
+}
+
+/* Early pad configuration in bootblock */
+static const struct pad_config early_gpio_table[] = {
+
+};
+
+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[] = {
+};
+
+const struct cros_gpio *variant_cros_gpios(size_t *num)
+{
+	*num = ARRAY_SIZE(cros_gpios);
+	return cros_gpios;
+}

src/mainboard/google/volteer/variants/halvor/include/variant/ec.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef __VARIANT_EC_H__
+#define __VARIANT_EC_H__
+
+#include <baseboard/ec.h>
+
+#endif

src/mainboard/google/volteer/variants/halvor/include/variant/gpio.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef VARIANT_GPIO_H
+#define VARIANT_GPIO_H
+
+#include <baseboard/gpio.h>
+
+/* Copied from baseboard and may need to change for the new variant. */
+
+#endif

src/mainboard/google/volteer/variants/halvor/overridetree.cb

@@ -0,0 +1,4 @@
+chip soc/intel/tigerlake
+	device domain 0 on
+	end
+end