1 files changed, 93 insertions, 0 deletions
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl
new file mode 100644
index 0000000000..ee247f2065
--- /dev/null
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 Google Inc.
+ * Copyright (C) 2105 Intel Corp.
+ *
+ * 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.
+ */
+
+Device (TCHG)
+{
+	Name (_HID, "INT3403")
+	Name (_UID, 0)
+	Name (PTYP, 0x0B)
+	Name (_STR, Unicode("Battery Charger"))
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	/* Return charger performance states defined by Terra2 or Terra3 mainboard */
+	Method (PPSS)
+	{
+		If (LEqual (\_SB.GPID, TERRA2_PROJECT_ID))
+		{
+			Return (\_SB.CPT2)
+		} Else {
+			Return (\_SB.CPT3)
+		}
+	}
+
+	/* Return maximum charger current limit */
+	Method (PPPC)
+	{
+		/* Convert size of PPSS table to index */
+		If (LEqual (\_SB.GPID, TERRA2_PROJECT_ID))
+		{
+			Store (SizeOf (\_SB.CPT2), Local0)
+		} Else {
+			Store (SizeOf (\_SB.CPT3), Local0)
+		}
+
+		Decrement (Local0)
+
+		/* Check if charging is disabled (AC removed) */
+		If (LEqual (\_SB.PCI0.LPCB.EC0.ACEX, Zero)) {
+			/* Return last power state */
+			Return (Local0)
+		} Else {
+			/* Return highest power state */
+			Return (0)
+		}
+
+		Return (0)
+	}
+
+	/* Set charger current limit */
+	Method (SPPC, 1)
+	{
+		/* Retrieve Control (index 4) for specified PPSS level */
+		/* Convert size of PPSS table to index */
+		If (LEqual (\_SB.GPID, TERRA2_PROJECT_ID))
+		{
+			Store (DeRefOf (Index (DeRefOf (Index
+				(\_SB.CPT2, ToInteger (Arg0))), 4)), Local0)
+		} Else {
+			Store (DeRefOf (Index (DeRefOf (Index
+				(\_SB.CPT3, ToInteger (Arg0))), 4)), Local0)
+		}
+
+		/* Pass Control value to EC to limit charging */
+		\_SB.PCI0.LPCB.EC0.CHGS (Local0)
+	}
+
+	/* Initialize charger participant */
+	Method (INIT)
+	{
+		/* Disable charge limit */
+		\_SB.PCI0.LPCB.EC0.CHGD ()
+	}
+}