google/reef: Add asl code to enable google ChromeEC

This patch adds asl code to include support for Google ChromeEC.
We need this to show the battery icon and notifications like charger
connect/disconnect etc.

BUG = 53096
TEST = Plug/Unplug AC Adapter multiple times and make sure the battery
       connected is charging properly.

Change-Id: I06f48eda894418514c8ed0136500fff0efd12a35
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/15069
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

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

@@ -0,0 +1,26 @@
+/*
+ * 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.
+ */
+
+/* mainboard configuration */
+#include "../ec.h"
+
+/* 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

@@ -14,3 +14,29 @@
  */
 
 #include "acpi/superio.asl"
+
+Scope (\_SB)
+{
+	Device (LID0)
+	{
+		Name (_HID, EisaId ("PNP0C0D"))
+		Method (_LID, 0)
+		{
+			Return (\_SB.PCI0.LPCB.EC0.LIDS)
+		}
+	}
+
+	Device (PWRB)
+	{
+		Name (_HID, EisaId ("PNP0C0C"))
+	}
+}
+
+/*
+ * LPC Trusted Platform Module
+ */
+Scope (\_SB.PCI0.LPCB)
+{
+	#include <drivers/pc80/tpm/acpi/tpm.asl>
+	#include "ec.asl"
+}

src/mainboard/google/reef/dsdt.asl

@@ -25,6 +25,9 @@ DefinitionBlock(
 	/* global NVS and variables */
 	#include <soc/intel/skylake/acpi/globalnvs.asl>
 
+	/* CPU */
+	#include <soc/intel/apollolake/acpi/cpu.asl>
+
 	Scope (\_SB) {
 		Device (PCI0)
 		{

src/mainboard/google/reef/ec.h

@@ -18,6 +18,10 @@
 
 #include <ec/google/chromeec/ec_commands.h>
 
+/* This is the GPE status bit.
+   TODO: Fix this to proper bit matching GPE routing table */
+#define EC_SCI_GPI   15
+
 #define MAINBOARD_EC_SCI_EVENTS \
 	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED)        |\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN)          |\