dt-bindings: dma: Convert marvell,orion-xor to DT schema

Convert the Marvell Orion XOR engine binding to schema.

The "clocks" property is optional for some platforms (though not
distinguished by compatble). The child node names used are 'channel' or
'xor'.

Signed-off-by: Rob Herring (Arm) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: robherring

Documentation/devicetree/bindings/dma/marvell,orion-xor.yaml

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/marvell,orion-xor.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell XOR engine
+
+maintainers:
+  - Andrew Lunn <[email protected]>
+  - Gregory Clement <[email protected]>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: marvell,armada-380-xor
+          - const: marvell,orion-xor
+      - enum:
+          - marvell,armada-3700-xor
+          - marvell,orion-xor
+
+  reg:
+    items:
+      - description: Low registers for the XOR engine
+      - description: High registers for the XOR engine
+
+  clocks:
+    maxItems: 1
+
+patternProperties:
+  "^(channel|xor)[0-9]+$":
+    description: XOR channel sub-node
+    type: object
+    additionalProperties: false
+
+    properties:
+      interrupts:
+        description: Interrupt specifier for the XOR channel
+        items:
+          - description: Interrupt for this channel
+
+      dmacap,memcpy:
+        type: boolean
+        deprecated: true
+        description:
+          Indicates that the XOR channel is capable of memcpy operations
+
+      dmacap,memset:
+        type: boolean
+        deprecated: true
+        description:
+          Indicates that the XOR channel is capable of memset operations
+
+      dmacap,xor:
+        type: boolean
+        deprecated: true
+        description:
+          Indicates that the XOR channel is capable of xor operations
+
+    required:
+      - interrupts
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    xor@d0060900 {
+        compatible = "marvell,orion-xor";
+        reg = <0xd0060900 0x100>,
+              <0xd0060b00 0x100>;
+        clocks = <&coreclk 0>;
+
+        xor00 {
+            interrupts = <51>;
+        };
+        xor01 {
+            interrupts = <52>;
+        };
+    };