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, 31 insertions, 0 deletions

diff --git a/kernel/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/kernel/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
new file mode 100644
index 000000000..c95005efb
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
@@ -0,0 +1,31 @@
+* Freescale low power universal asynchronous receiver/transmitter (lpuart)
+
+Required properties:
+- compatible :
+  - "fsl,vf610-lpuart" for lpuart compatible with the one integrated
+    on Vybrid vf610 SoC with 8-bit register organization
+  - "fsl,ls1021a-lpuart" for lpuart compatible with the one integrated
+    on LS1021A SoC with 32-bit big-endian register organization
+- reg : Address and length of the register set for the device
+- interrupts : Should contain uart interrupt
+- clocks : phandle + clock specifier pairs, one for each entry in clock-names
+- clock-names : should contain: "ipg" - the uart clock
+
+Optional properties:
+- dmas: A list of two dma specifiers, one for each entry in dma-names.
+- dma-names: should contain "tx" and "rx".
+
+Note: Optional properties for DMA support. Write them both or both not.
+
+Example:
+
+uart0: serial@40027000 {
+		compatible = "fsl,vf610-lpuart";
+		reg = <0x40027000 0x1000>;
+		interrupts = <0 61 0x00>;
+		clocks = <&clks VF610_CLK_UART0>;
+		clock-names = "ipg";
+		dmas = <&edma0 0 2>,
+			<&edma0 0 3>;
+		dma-names = "rx","tx";
+	};