mainboard/reef: add variant support to ASL code

There are certain board-specific options for reef variants. The
big one is the DPTF settings. Rearrange the ASL files such
that dsdt.asl is the main landing area. The ACPI options for
Chrome EC are contained in the variant/ec.h header so the
actual code #includes can just reside in dstd.asl. Since most
of the mainboard specific peripherals are auto generated by
the acpigen from devicetree there's no real separate need
for mainboard.asl. The one thing not addressed in this CL
is the notion of a variant having the Chrome EC or not (along
with lid, etc). Future indirection can be provided when needed
to address that requirement.

BUG=chrome-os-partner:56677

Change-Id: I5c888f5fc64913dcff010c28f87e69ac5449e6b6
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16604
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/mainboard/google/reef/acpi/ec.asl

@@ -1,23 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2015 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.
- */
-
-/* Enable EC backed ALS device in ACPI */
-#define EC_ENABLE_ALS_DEVICE
-
-/* Enable EC backed PD MCU device in ACPI */
-#define EC_ENABLE_PD_MCU_DEVICE
-
-/* ACPI code for EC functions */
-#include <ec/google/chromeec/acpi/ec.asl>

src/mainboard/google/reef/acpi/mainboard.asl

@@ -1,42 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2016 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 <variant/ec.h>
-#include <variant/gpio.h>
-
-Scope (\_SB)
-{
-	Device (LID0)
-	{
-		Name (_HID, EisaId ("PNP0C0D"))
-		Method (_LID, 0)
-		{
-			Return (\_SB.PCI0.LPCB.EC0.LIDS)
-		}
-		Name (_PRW, Package () { GPE_EC_WAKE, 0x3 })
-	}
-
-	Device (PWRB)
-	{
-		Name (_HID, EisaId ("PNP0C0C"))
-	}
-}
-
-Scope (\_SB.PCI0.LPCB)
-{
-	/* Chrome OS Embedded Controller */
-	#include "superio.asl"
-	#include "ec.asl"
-}

src/mainboard/google/reef/dsdt.asl

@@ -13,6 +13,9 @@
  * GNU General Public License for more details.
  */
 
+#include <variant/ec.h>
+#include <variant/gpio.h>
+
 DefinitionBlock(
 	"dsdt.aml",
 	"DSDT",
@@ -43,11 +46,42 @@ DefinitionBlock(
 	/* Chipset specific sleep states */
 	#include <soc/intel/apollolake/acpi/sleepstates.asl>
 
-	/* Mainboard Specific devices */
-	#include "acpi/mainboard.asl"
+	/* LID and Power button. */
+	Scope (\_SB)
+	{
+		Device (LID0)
+		{
+			Name (_HID, EisaId ("PNP0C0D"))
+			Method (_LID, 0)
+			{
+				Return (\_SB.PCI0.LPCB.EC0.LIDS)
+			}
+			Name (_PRW, Package () { GPE_EC_WAKE, 0x3 })
+		}
+
+		Device (PWRB)
+		{
+			Name (_HID, EisaId ("PNP0C0C"))
+		}
+	}
+
+	/* Chrome OS Embedded Controller */
+	Scope (\_SB.PCI0.LPCB)
+	{
+		/* ACPI code for EC SuperIO functions */
+		#include <ec/google/chromeec/acpi/superio.asl>
+		/* ACPI code for EC functions */
+		#include <ec/google/chromeec/acpi/ec.asl>
+	}
 
-	Scope (\_SB) {
 	/* Dynamic Platform Thermal Framework */
-		#include "acpi/dptf.asl"
+	Scope (\_SB)
+	{
+		/* Per board variant specific definitions. */
+		#include <variant/acpi/dptf.asl>
+		/* Include soc specific DPTF changes */
+		#include <soc/intel/apollolake/acpi/dptf.asl>
+		/* Include common dptf ASL files */
+		#include <soc/intel/common/acpi/dptf/dptf.asl>
 	}
 }

src/mainboard/google/reef/variants/baseboard/include/baseboard/acpi/dptf.asl

@@ -87,8 +87,3 @@ Name (MPPC, Package ()
 		1000	/* StepSize */
 	}
 })
-
-/* Include soc specific DPTF changes */
-#include <soc/intel/apollolake/acpi/dptf.asl>
-/* Include common dptf ASL files */
-#include <soc/intel/common/acpi/dptf/dptf.asl>

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

@@ -54,4 +54,18 @@
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_SHUTDOWN)|\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PANIC))
 
+/*
+ * ACPI related definitions for ASL code.
+ */
+
+/* Enable EC backed ALS device in ACPI */
+#define EC_ENABLE_ALS_DEVICE
+
+/* Enable EC backed PD MCU device in ACPI */
+#define EC_ENABLE_PD_MCU_DEVICE
+
+#define SIO_EC_MEMMAP_ENABLE     /* EC Memory Map Resources */
+#define SIO_EC_HOST_ENABLE       /* EC Host Interface Resources */
+#define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
+
 #endif

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

@@ -13,9 +13,4 @@
  * GNU General Public License for more details.
  */
 
-#define SIO_EC_MEMMAP_ENABLE     // EC Memory Map Resources
-#define SIO_EC_HOST_ENABLE       // EC Host Interface Resources
-#define SIO_EC_ENABLE_PS2K       // Enable PS/2 Keyboard
-
-/* ACPI code for EC SuperIO functions */
-#include <ec/google/chromeec/acpi/superio.asl>
+#include <baseboard/acpi/dptf.asl>