intel/skylake: Add support for DPTF

This patch adds the ASL files with the DPTF related settings and the
thermal devices enabled in the SOC. It also enables the DPTF setting
at the global NVS level.

BRANCH=None
BUG=chrome-os-partner:40855
TEST=Built for kunimitsu board. Tested to see that the thermal devices
and the participants are enumerated and can be seen in the
/sys/bus/platform/devices. Also checked the temperature readings of the
cooling devices and the thermal zones enumerated in the /sys/class/thermal.

Change-Id: I8ad044eaf1ad488fb1682097da83b40d2bede414
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Original-Commit-Id: 7624eeca19b4f286b30c3d4ac5b44c5e9619c2c7
Original-Change-Id: I0d92ef42cff5567ea6fc566730588802d8549ce0
Original-Signed-off-by: Shilpa Sreeramalu <shilpa.sreeramalu@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/293391
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Original-Commit-Queue: Naveenkrishna Ch <naveenkrishna.ch@intel.com>
Reviewed-on: http://review.coreboot.org/11430
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/acpi/dptf/charger.asl b/src/soc/intel/skylake/acpi/dptf/charger.asl
new file mode 100644
index 0000000000..bcf5963e18
--- /dev/null
+++ b/src/soc/intel/skylake/acpi/dptf/charger.asl
@@ -0,0 +1,79 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ * Copyright (C) 2015 Intel Corporation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+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 mainboard */
+	Method (PPSS)
+	{
+		Return (\_SB.CHPS)
+	}
+
+	/* Return maximum charger current limit */
+	Method (PPPC)
+	{
+		/* Convert size of PPSS table to index */
+		Store (SizeOf (\_SB.CHPS), 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 */
+		Store (DeRefOf (Index (DeRefOf (Index
+			(\_SB.CHPS, 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 ()
+	}
+}