tty: serial: add Freescale lpuart driver support

Add Freescale lpuart driver support. The lpuart device
can be found on Vybrid VF610 and Layerscape LS-1 SoCs.

Signed-off-by: Jingchang Lu <b35083@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-lpuart.txt
new file mode 100644
index 00000000000..6fd1dd1638d
--- /dev/null
+++ b/Documentation/devicetree/bindings/tty/serial/fsl-lpuart.txt
@@ -0,0 +1,14 @@
+* Freescale low power universal asynchronous receiver/transmitter (lpuart)
+
+Required properties:
+- compatible : Should be "fsl,<soc>-lpuart"
+- reg : Address and length of the register set for the device
+- interrupts : Should contain uart interrupt
+
+Example:
+
+uart0: serial@40027000 {
+	       compatible = "fsl,vf610-lpuart";
+	       reg = <0x40027000 0x1000>;
+	       interrupts = <0 61 0x00>;
+       };