google/celes: add new board as variant of cyan baseboard

Add support for google/celes (Samsung Chromebook 3) as
a variant of the cyan Braswell baseboard.

- Add board-specific code as the new celes variant
- Add new trackpad I2C device to the baseboard for potential
reuse by other variants

Sourced from Chromium branch firmware-celes-7287.92.B,
commit 9f0760a: Revert "Revert "soc/intel/braswell: Populate NVS SCC BAR1""

Change-Id: Id52d3c523bae7745b3dc04da012ab65c1fb37887
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/21572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/mainboard/google/cyan/acpi/trackpad_atmel.asl b/src/mainboard/google/cyan/acpi/trackpad_atmel.asl
new file mode 100644
index 0000000000..da2cf7a517
--- /dev/null
+++ b/src/mainboard/google/cyan/acpi/trackpad_atmel.asl
@@ -0,0 +1,54 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 Google Inc.
+ * Copyright (C) 2015 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.
+ */
+
+Scope (\_SB.PCI0.I2C6)
+{
+	Device (ATPA)
+	{
+		Name (_HID, "ATML0000")
+		Name (_DDN, "Atmel Touchpad")
+		Name (_UID, 2)
+		Name (ISTP, 1) /* Touchpad */
+		Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 })
+
+		Name (_CRS, ResourceTemplate()
+		{
+			I2cSerialBus (
+				0x4a,				// SlaveAddress
+				ControllerInitiated,		// SlaveMode
+				400000,				// ConnectionSpeed
+				AddressingMode7Bit,		// AddressingMode
+				"\\_SB.PCI0.I2C6",		// ResourceSource
+			)
+			Interrupt (ResourceConsumer, Edge, ActiveLow)
+			{
+				183
+			}
+		})
+
+		Method (_STA)
+		{
+			If (LEqual (\S6EN, 1)) {
+				Return (0xF)
+			} Else {
+				Return (0x0)
+			}
+		}
+
+		/* Allow device to power off in S0 */
+		Name (_S0W, 4)
+	}
+}