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, 26 insertions, 0 deletions

diff --git a/kernel/Documentation/devicetree/bindings/clock/pwm-clock.txt b/kernel/Documentation/devicetree/bindings/clock/pwm-clock.txt
new file mode 100644
index 000000000..83db876b3
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/clock/pwm-clock.txt
@@ -0,0 +1,26 @@
+Binding for an external clock signal driven by a PWM pin.
+
+This binding uses the common clock binding[1] and the common PWM binding[2].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+[2] Documentation/devicetree/bindings/pwm/pwm.txt
+
+Required properties:
+- compatible : shall be "pwm-clock".
+- #clock-cells : from common clock binding; shall be set to 0.
+- pwms : from common PWM binding; this determines the clock frequency
+  via the period given in the PWM specifier.
+
+Optional properties:
+- clock-output-names : From common clock binding.
+- clock-frequency : Exact output frequency, in case the PWM period
+  is not exact but was rounded to nanoseconds.
+
+Example:
+	clock {
+		compatible = "pwm-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+		clock-output-names = "mipi_mclk";
+		pwms = <&pwm2 0 40>; /* 1 / 40 ns = 25 MHz */
+	};