This converts the existing documentation for the uartlite binding to
json-schema.

Signed-off-by: Sean Anderson <redacted>
---

(no changes since v1)

 .../bindings/serial/xlnx,opb-uartlite.txt     | 23 --------
 .../bindings/serial/xlnx,opb-uartlite.yaml    | 53 +++++++++++++++++++
 2 files changed, 53 insertions(+), 23 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt
 create mode 100644 Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml

diff --git a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt
deleted file mode 100644
index c37deb44dead..000000000000
--- a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.txt
+++ /dev/null

@@ -1,23 +0,0 @@
-Xilinx Axi Uartlite controller Device Tree Bindings
----------------------------------------------------------
-
-Required properties:
-- compatible		: Can be either of
-				"xlnx,xps-uartlite-1.00.a"
-				"xlnx,opb-uartlite-1.00.b"
-- reg			: Physical base address and size of the Axi Uartlite
-			  registers map.
-- interrupts		: Should contain the UART controller interrupt.
-
-Optional properties:
-- port-number		: Set Uart port number
-- clock-names		: Should be "s_axi_aclk"
-- clocks		: Input clock specifier. Refer to common clock bindings.
-
-Example:
-serial@800c0000 {
-	compatible = "xlnx,xps-uartlite-1.00.a";
-	reg = <0x0 0x800c0000 0x10000>;
-	interrupts = <0x0 0x6e 0x1>;
-	port-number = <0>;
-};

diff --git a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml
new file mode 100644
index 000000000000..4ef29784ae97
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/xlnx,opb-uartlite.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx Axi Uartlite
+
+maintainers:
+  - Peter Korsgaard <jacmet@sunsite.dk>
+
+properties:
+  compatible:
+    contains:
+      enum:
+        - xlnx,xps-uartlite-1.00.a
+        - xlnx,opb-uartlite-1.00.b
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  port-number:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Set Uart port number
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: s_axi_aclk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: /schemas/serial.yaml#
+
+additionalProperties: true