[PATCH 4/6] dt-bindings: serial: Document Freescale LINFlex UART

[Stefan-gabriel Mirea]

From: Stoica Cosmin-Stefan <cosmin.stoica@xxxxxxx>

Add documentation for the serial communication interface module (LINFlex),
found in two instances on S32V234.

Signed-off-by: Stoica Cosmin-Stefan <cosmin.stoica@xxxxxxx>
Signed-off-by: Larisa Grigore <Larisa.Grigore@xxxxxxx>
Signed-off-by: Stefan-Gabriel Mirea <stefan-gabriel.mirea@xxxxxxx>
---
 .../bindings/serial/fsl,s32-linflexuart.txt   | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt

diff --git a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt
new file mode 100644
index 000000000000..957ffeaca9f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.txt
@@ -0,0 +1,24 @@
+* Freescale Linflex UART
+
+The LINFlexD controller implements several LIN protocol versions, as well as
+support for full-duplex UART communication through 8-bit and 9-bit frames. The
+Linflex UART driver enables operation only in UART mode.
+
+See chapter 47 ("LINFlexD") in the reference manual[1].
+
+Required properties:
+- compatible :
+  - "fsl,s32-linflexuart" for linflex configured in uart mode which
+  is compatible with the one integrated on S32V234 SoC
+- reg : Address and length of the register set for the device
+- interrupts : Should contain uart interrupt
+
+Example:
+uart0:serial@40053000 {
+	compatible = "fsl,s32-linflexuart";
+	reg = <0x0 0x40053000 0x0 0x1000>;
+	interrupts = <0 59 4>;
+	status = "disabled";
+};
+
+[1] https://www.nxp.com/webapp/Download?colCode=S32V234RM
-- 
2.22.0