mb/google/fizz: Provide baseboard and variant concepts

In order to be able to share code across different fizz variants,
provide the concept of baseboard and variants. New directory layout:

variants/baseboard - code
variants/baseboard/include/baseboard - headers
variants/fizz - code
variants/fizz/include/variant - headers

New boards would then add themselves under their board name within
"variants" directory.

This is purely an organizational change.

BUG=b:117066935
BRANCH=Fizz
TEST=emerge-fizz coreboot
CQ-DEPEND=CL:1273514

Change-Id: I28cc41681e7af88ddeba2e847dc0a4686606feb2
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/28962
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/mainboard/google/fizz/Kconfig

@@ -25,6 +25,10 @@ config BOARD_GOOGLE_BASEBOARD_FIZZ
 
 if BOARD_GOOGLE_BASEBOARD_FIZZ
 
+config DEVICETREE
+	string
+	default "variants/baseboard/devicetree.cb"
+
 config VBOOT
 	select EC_GOOGLE_CHROMEEC_SWITCHES
 	select VBOOT_EC_EFS
@@ -68,6 +72,10 @@ config TPM_TIS_ACPI_INTERRUPT
 	int
 	default 64  # GPE0_DW2_00 (GPP_E0)
 
+config VARIANT_DIR
+	string
+	default "fizz" if BOARD_GOOGLE_FIZZ
+
 config INCLUDE_NHLT_BLOBS
 	bool "Include blobs for audio."
 	select NHLT_RT5663

src/mainboard/google/fizz/Makefile.inc

@@ -26,3 +26,9 @@ ramstage-y += mainboard.c
 ramstage-y += ramstage.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
+
+subdirs-y += variants/baseboard
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include
+
+subdirs-y += variants/$(VARIANT_DIR)
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include

src/mainboard/google/fizz/bootblock.c

@@ -16,7 +16,7 @@
 #include <bootblock_common.h>
 #include <soc/gpio.h>
 
-#include "gpio.h"
+#include <variant/gpio.h>
 
 static void early_config_gpio(void)
 {

src/mainboard/google/fizz/chromeos.c

@@ -18,7 +18,7 @@
 #include <soc/gpio.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
-#include "gpio.h"
+#include <variant/gpio.h>
 
 #if ENV_RAMSTAGE
 #include <boot/coreboot_tables.h>

src/mainboard/google/fizz/dsdt.asl

@@ -13,8 +13,8 @@
  * GNU General Public License for more details.
  */
 
-#include "ec.h"
+#include <variant/ec.h>
-#include "gpio.h"
+#include <variant/gpio.h>
 
 DefinitionBlock(
 	"dsdt.aml",
@@ -61,7 +61,7 @@ DefinitionBlock(
 	Scope (\_SB)
 	{
 		/* Dynamic Platform Thermal Framework */
-		#include "acpi/dptf.asl"
+		#include <variant/acpi/dptf.asl>
 	}
 
 	/* USB port entries */

src/mainboard/google/fizz/ec.c

@@ -16,7 +16,7 @@
 #include <arch/acpi.h>
 #include <ec/google/chromeec/ec.h>
 
-#include "ec.h"
+#include <variant/ec.h>
 
 void mainboard_ec_init(void)
 {

src/mainboard/google/fizz/mainboard.c

@@ -20,7 +20,7 @@
 #include <ec/ec.h>
 #include <ec/google/chromeec/ec.h>
 #include <gpio.h>
-#include <mainboard/google/fizz/gpio.h>
+#include <variant/gpio.h>
 #include <smbios.h>
 #include <soc/gpio.h>
 #include <soc/pci_devs.h>

src/mainboard/google/fizz/ramstage.c

@@ -18,12 +18,11 @@
 #include <delay.h>
 #include <ec/google/chromeec/ec.h>
 #include <gpio.h>
-#include <mainboard/google/fizz/gpio.h>
 #include <soc/gpio.h>
 #include <soc/ramstage.h>
 #include <timer.h>
 
-#include "gpio.h"
+#include <variant/gpio.h>
 
 #define GPIO_HDMI_HPD		GPP_E13
 #define GPIO_DP_HPD		GPP_E14

src/mainboard/google/fizz/smihandler.c

@@ -17,7 +17,7 @@
 #include <ec/google/chromeec/smm.h>
 #include <soc/smm.h>
 
-#include "ec.h"
+#include <variant/ec.h>
 
 void mainboard_smi_espi_handler(void)
 {

src/mainboard/google/fizz/variants/baseboard/include/baseboard/ec.h

@@ -13,13 +13,13 @@
  * GNU General Public License for more details.
  */
 
-#ifndef __MAINBOARD_EC_H__
+#ifndef __BASEBOARD_EC_H__
-#define __MAINBOARD_EC_H__
+#define __BASEBOARD_EC_H__
 
 #include <ec/ec.h>
 #include <ec/google/chromeec/ec_commands.h>
 
-#include "gpio.h"
+#include <variant/gpio.h>
 
 #define MAINBOARD_EC_SCI_EVENTS \
 	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED)      |\

src/mainboard/google/fizz/variants/baseboard/include/baseboard/gpio.h

@@ -13,8 +13,8 @@
  * GNU General Public License for more details.
  */
 
-#ifndef __MAINBOARD_GPIO_H__
+#ifndef __BASEBOARD_GPIO_H__
-#define __MAINBOARD_GPIO_H__
+#define __BASEBOARD_GPIO_H__
 
 #include <soc/gpe.h>
 #include <soc/gpio.h>
@@ -281,6 +281,6 @@ static const struct pad_config early_gpio_table[] = {
 /* SATA_DEVSLP1 */     PAD_CFG_NF(GPP_E5, NONE, DEEP, NF1), /* DEVSLP1_MB */
 };
 
-#endif
+#endif /* __ACPI__ */
 
-#endif
+#endif /* BASEBOARD_GPIO_H */

src/mainboard/google/fizz/variants/fizz/include/variant/acpi/dptf.asl

@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <baseboard/acpi/dptf.asl>

src/mainboard/google/fizz/variants/fizz/include/variant/ec.h

@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MAINBOARD_EC_H__
+#define __MAINBOARD_EC_H__
+
+#include <baseboard/ec.h>
+
+#endif /* __MAINBOARD_EC_H__ */

src/mainboard/google/fizz/variants/fizz/include/variant/gpio.h

@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MAINBOARD_GPIO_H__
+#define __MAINBOARD_GPIO_H__
+
+#include <baseboard/gpio.h>
+
+#endif /* __MAINBOARD_GPIO_H__ */