dt-bindings: memory: convert Synopsys IntelliDDR memory controller to dtschema

Convert Synopsys IntelliDDR Multi Protocol memory controller (present in
Xilinx Zynq and ZynqMP) bindings to DT schema format using json-schema.

New binding contains copied parts of description from previous binding
document, therefore the license is set as GPL-2.0-only.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210818113139.84869-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/memory-controllers/synopsys,ddrc-ecc.yaml

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/synopsys,ddrc-ecc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys IntelliDDR Multi Protocol memory controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+  - Manish Narani <manish.narani@xilinx.com>
+  - Michal Simek <michal.simek@xilinx.com>
+
+description: |
+  The ZynqMP DDR ECC controller has an optional ECC support in 64-bit and
+  32-bit bus width configurations.
+
+  The Zynq DDR ECC controller has an optional ECC support in half-bus width
+  (16-bit) configuration.
+
+  These both ECC controllers correct single bit ECC errors and detect double bit
+  ECC errors.
+
+properties:
+  compatible:
+    enum:
+      - xlnx,zynq-ddrc-a05
+      - xlnx,zynqmp-ddrc-2.40a
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: xlnx,zynqmp-ddrc-2.40a
+    then:
+      required:
+        - interrupts
+    else:
+      properties:
+        interrupts: false
+
+additionalProperties: false
+
+examples:
+  - |
+    memory-controller@f8006000 {
+        compatible = "xlnx,zynq-ddrc-a05";
+        reg = <0xf8006000 0x1000>;
+    };
+
+  - |
+    axi {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        memory-controller@fd070000 {
+            compatible = "xlnx,zynqmp-ddrc-2.40a";
+            reg = <0x0 0xfd070000 0x0 0x30000>;
+            interrupt-parent = <&gic>;
+            interrupts = <0 112 4>;
+        };
+    };

Documentation/devicetree/bindings/memory-controllers/synopsys.txt

@@ -1,32 +0,0 @@
-Binding for Synopsys IntelliDDR Multi Protocol Memory Controller
-
-The ZynqMP DDR ECC controller has an optional ECC support in 64-bit and 32-bit
-bus width configurations.
-
-The Zynq DDR ECC controller has an optional ECC support in half-bus width
-(16-bit) configuration.
-
-These both ECC controllers correct single bit ECC errors and detect double bit
-ECC errors.
-
-Required properties:
- - compatible: One of:
-	- 'xlnx,zynq-ddrc-a05' : Zynq DDR ECC controller
-	- 'xlnx,zynqmp-ddrc-2.40a' : ZynqMP DDR ECC controller
- - reg: Should contain DDR controller registers location and length.
-
-Required properties for "xlnx,zynqmp-ddrc-2.40a":
- - interrupts: Property with a value describing the interrupt number.
-
-Example:
-	memory-controller@f8006000 {
-		compatible = "xlnx,zynq-ddrc-a05";
-		reg = <0xf8006000 0x1000>;
-	};
-
-	mc: memory-controller@fd070000 {
-		compatible = "xlnx,zynqmp-ddrc-2.40a";
-		reg = <0x0 0xfd070000 0x0 0x30000>;
-		interrupt-parent = <&gic>;
-		interrupts = <0 112 4>;
-	};