Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt b/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt
new file mode 100644
index 000000000..6dede7d11
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt
@@ -0,0 +1,25 @@
+
+* Richtek RT8973A - Micro USB Switch device
+
+The Richtek RT8973A is Micro USB Switch with OVP and I2C interface. The RT8973A
+is a USB port accessory detector and switch that is optimized to protect low
+voltage system from abnormal high input voltage (up to 28V) and supports high
+speed USB operation. Also, RT8973A support 'auto-configuration' mode.
+If auto-configuration mode is enabled, RT8973A would control internal h/w patch
+for USB D-/D+ switching.
+
+Required properties:
+- compatible: Should be "richtek,rt8973a-muic"
+- reg: Specifies the I2C slave address of the MUIC block. It should be 0x14
+- interrupt-parent: Specifies the phandle of the interrupt controller to which
+  the interrupts from rt8973a are delivered to.
+- interrupts: Interrupt specifiers for detection interrupt sources.
+
+Example:
+
+	rt8973a@14 {
+		compatible = "richtek,rt8973a-muic";
+		interrupt-parent = <&gpx1>;
+		interrupts = <5 0>;
+		reg = <0x14>;
+	};