intel/common: Add ASL code for DPTF

This patch adds the common ASL code for Intel
platforms. This is the basic ASL needed to add support
for DPTF controlled devices. We are moving
these commmon ASL files to src/soc/intel/common/acpi as
these are same codes used in all Intel platforms and
hence no need to duplicate.

BUG=chrome-os-partner:53096
TEST=Verify that the thermal zones are enumerated
	under /sys/class/thermal. Navigate to
	/sys/class/thermal, and verify that a thermal
	zone of type TCPU exists there.

Change-Id: I01078382a9008263c6ad99f6bf07558885af6a63
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/15093
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/soc/intel/common/acpi/dptf/fan.asl b/src/soc/intel/common/acpi/dptf/fan.asl
new file mode 100644
index 0000000000..a748088e42
--- /dev/null
+++ b/src/soc/intel/common/acpi/dptf/fan.asl
@@ -0,0 +1,68 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 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.
+ */
+
+Device (TFN1)
+{
+	Name (_HID, "INT3404")
+	Name (_UID, 0)
+	Name (_STR, Unicode("Fan Control"))
+
+	/* _FIF: Fan Information */
+	Name (_FIF, Package ()
+	{
+		0,	// Revision
+		1,	// Fine Grained Control
+		2,	// Step Size
+		0	// No Low Speed Notification
+	})
+
+	/* Return Fan Performance States defined by mainboard */
+	Method (_FPS)
+	{
+		Return (\_SB.DFPS)
+	}
+
+	Name (TFST, Package ()
+	{
+		0,	// Revision
+		0x00,	// Control
+		0x00	// Speed
+	})
+
+	/* _FST: Fan current Status */
+	Method (_FST, 0, Serialized,,PkgObj)
+	{
+		/* Fill in TFST with current control. */
+		Store (\_SB.PCI0.LPCB.EC0.FAND, Index (TFST, 1))
+		Return (TFST)
+	}
+
+	/* _FSL: Fan Speed Level */
+	Method (_FSL, 1, Serialized)
+	{
+		Store (Arg0, \_SB.PCI0.LPCB.EC0.FAND)
+		Notify (DPTF, 0x83)	// Reevaluate _ART
+	}
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One))
+		{
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+}