mb/google/volteer: Create drobit variant

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

(Auto-Generated by create_coreboot_variant.sh version 4.2.0).

BUG=b:171947885
BRANCH=none
TEST=emerge-volteer coreboot

Signed-off-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com>
Change-Id: I63b7312bba236bd5af028359804d042f6850d8ba
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47787
Reviewed-by: Zhuohao Lee <zhuohao@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/volteer/Kconfig

@@ -106,6 +106,7 @@ config MAINBOARD_PART_NUMBER
 	default "Boldar" if BOARD_GOOGLE_BOLDAR
 	default "Elemi" if BOARD_GOOGLE_ELEMI
 	default "Voema" if BOARD_GOOGLE_VOEMA
+	default "Drobit" if BOARD_GOOGLE_DROBIT
 
 config MAX_CPUS
 	int
@@ -146,6 +147,7 @@ config VARIANT_DIR
 	default "boldar" if BOARD_GOOGLE_BOLDAR
 	default "elemi" if BOARD_GOOGLE_ELEMI
 	default "voema" if BOARD_GOOGLE_VOEMA
+	default "drobit" if BOARD_GOOGLE_DROBIT
 
 config VARIANT_HAS_MIPI_CAMERA
 	bool

src/mainboard/google/volteer/Kconfig.name

@@ -89,3 +89,7 @@ config BOARD_GOOGLE_VOEMA
 	bool "-> Voema"
 	select BOARD_GOOGLE_BASEBOARD_VOLTEER
 	select SOC_INTEL_CSE_LITE_SKU
+
+config BOARD_GOOGLE_DROBIT
+	bool "-> Drobit"
+	select BOARD_GOOGLE_BASEBOARD_VOLTEER

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

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __VARIANT_EC_H__
+#define __VARIANT_EC_H__
+
+#include <baseboard/ec.h>
+
+#endif

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

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef VARIANT_GPIO_H
+#define VARIANT_GPIO_H
+
+#include <baseboard/gpio.h>
+
+/* Memory configuration board straps */
+/* Copied from baseboard and may need to change for the new variant. */
+#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
+
+#endif

src/mainboard/google/volteer/variants/drobit/memory/Makefile.inc

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+## This is an auto-generated file. Do not edit!!
+## Add memory parts in mem_parts_used.txt and run spd_tools to regenerate.
+
+SPD_SOURCES = placeholder.spd.hex

src/mainboard/google/volteer/variants/drobit/memory/dram_id.generated.txt

@@ -0,0 +1 @@
+DRAM Part Name                 ID to assign

src/mainboard/google/volteer/variants/drobit/memory/mem_parts_used.txt

@@ -0,0 +1,4 @@
+# This is a CSV file containing a list of memory parts used by this variant.
+# Generate an updated Makefile.inc and dram_id.generated.txt by running the
+# gen_part_id tool from util/spd_tools/ddr4 or util/spd_tools/lp4x
+# See util/spd_tools/{ddr4,lp4x}/README.md for more details and instructions.

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

@@ -0,0 +1,6 @@
+chip soc/intel/tigerlake
+
+	device domain 0 on
+	end
+
+end