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diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.yaml b/Documentation/devicetree/bindings/serial/sprd-uart.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2019 Unisoc Inc.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/serial/sprd-uart.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Spreadtrum serial UART
+
+maintainers:
+  - Orson Zhai <orsonzhai@gmail.com>
+  - Baolin Wang <baolin.wang7@gmail.com>
+  - Chunyan Zhang <zhang.lyra@gmail.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sprd,sc9860-uart
+              - sprd,sc9863a-uart
+          - const: sprd,sc9836-uart
+      - const: sprd,sc9836-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 3
+
+  clock-names:
+    description: |
+      "enable" for UART module enable clock, "uart" for UART clock, "source" 
+      for UART source (parent) clock.
+    items:
+      - const: enable
+      - const: uart
+      - const: source
+
+  dmas:
+    minItems: 1
+    maxItems: 2
+
+  dma-names:
+    minItems: 1
+    items:
+      - const: rx
+      - const: tx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    serial@0 {
+      compatible = "sprd,sc9860-uart", "sprd,sc9836-uart";
+      reg = <0x0 0x100>;
+      interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
+      dma-names = "rx", "tx";
+      dmas = <&ap_dma 19>, <&ap_dma 20>;
+      clock-names = "enable", "uart", "source";
+      clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
+    };
+
+...