Convert serial for Cadence UART bindings documentation to YAML.

Signed-off-by: Nobuhiro Iwamatsu <redacted>
---
 .../devicetree/bindings/serial/cdns,uart.txt  | 27 --------
 .../devicetree/bindings/serial/cdns,uart.yaml | 68 +++++++++++++++++++
 2 files changed, 68 insertions(+), 27 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/serial/cdns,uart.txt
 create mode 100644 Documentation/devicetree/bindings/serial/cdns,uart.yaml

diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.txt b/Documentation/devicetree/bindings/serial/cdns,uart.txt
deleted file mode 100644
index 4efc560f90abbd..00000000000000
--- a/Documentation/devicetree/bindings/serial/cdns,uart.txt
+++ /dev/null

@@ -1,27 +0,0 @@
-Binding for Cadence UART Controller
-
-Required properties:
-- compatible :
-  Use "xlnx,xuartps","cdns,uart-r1p8" for Zynq-7xxx SoC.
-  Use "xlnx,zynqmp-uart","cdns,uart-r1p12" for Zynq Ultrascale+ MPSoC.
-- reg: Should contain UART controller registers location and length.
-- interrupts: Should contain UART controller interrupts.
-- clocks: Must contain phandles to the UART clocks
-  See ../clocks/clock-bindings.txt for details.
-- clock-names: Tuple to identify input clocks, must contain "uart_clk" and "pclk"
-  See ../clocks/clock-bindings.txt for details.
-
-
-Optional properties:
-- cts-override : Override the CTS modem status signal. This signal will
-  always be reported as active instead of being obtained from the modem status
-  register. Define this if your serial port does not use this pin
-
-Example:
-	uart@e0000000 {
-		compatible = "cdns,uart-r1p8";
-		clocks = <&clkc 23>, <&clkc 40>;
-		clock-names = "uart_clk", "pclk";
-		reg = <0xE0000000 0x1000>;
-		interrupts = <0 27 4>;
-	};

diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.yaml b/Documentation/devicetree/bindings/serial/cdns,uart.yaml
new file mode 100644
index 00000000000000..ce467fa464bfd0
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/cdns,uart.yaml

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/cdns,uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence UART Controller Device Tree Bindings
+
+maintainers:
+  - Michal Simek <michal.simek@xilinx.com>
+
+allOf:
+  - $ref: /schemas/serial.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - description: UART controller for Zynq-7xxx SoC
+        items:
+          - enum:
+            - xlnx,xuartps
+            - cdns,uart-r1p8