dt-bindings: dmaengine: zynqmp_dma: convert to yaml

Convert the Xilinx ZynqMP DMA engine bindings to Yaml.
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220112151541.1328732-2-m.tretter@pengutronix.de

Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx ZynqMP DMA Engine
+
+description: |
+  The Xilinx ZynqMP DMA engine supports memory to memory transfers,
+  memory to device and device to memory transfers. It also has flow
+  control and rate control support for slave/peripheral dma access.
+
+maintainers:
+  - Michael Tretter <m.tretter@pengutronix.de>
+
+allOf:
+  - $ref: "../dma-controller.yaml#"
+
+properties:
+  "#dma-cells":
+    const: 1
+
+  compatible:
+    const: xlnx,zynqmp-dma-1.0
+
+  reg:
+    description: memory map for gdma/adma module access
+    maxItems: 1
+
+  interrupts:
+    description: DMA channel interrupt
+    maxItems: 1
+
+  clocks:
+    description: input clocks
+    minItems: 2
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: clk_main
+      - const: clk_apb
+
+  xlnx,bus-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 64
+      - 128
+    description: AXI bus width in bits
+
+  iommus:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  dma-coherent:
+    description: present if dma operations are coherent
+
+required:
+  - "#dma-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/xlnx-zynqmp-clk.h>
+
+    fpd_dma_chan1: dma-controller@fd500000 {
+      compatible = "xlnx,zynqmp-dma-1.0";
+      reg = <0xfd500000 0x1000>;
+      interrupt-parent = <&gic>;
+      interrupts = <0 117 0x4>;
+      #dma-cells = <1>;
+      clock-names = "clk_main", "clk_apb";
+      clocks = <&zynqmp_clk GDMA_REF>, <&zynqmp_clk LPD_LSBUS>;
+      xlnx,bus-width = <128>;
+      dma-coherent;
+    };

Documentation/devicetree/bindings/dma/xilinx/zynqmp_dma.txt

-Xilinx ZynqMP DMA engine, it does support memory to memory transfers,
-memory to device and device to memory transfers. It also has flow
-control and rate control support for slave/peripheral dma access.
-
-Required properties:
-- compatible		: Should be "xlnx,zynqmp-dma-1.0"
-- reg			: Memory map for gdma/adma module access.
-- interrupts		: Should contain DMA channel interrupt.
-- xlnx,bus-width	: Axi buswidth in bits. Should contain 128 or 64
-- clock-names		: List of input clocks "clk_main", "clk_apb"
-			  (see clock bindings for details)
-
-Optional properties:
-- dma-coherent		: Present if dma operations are coherent.
-
-Example:
-++++++++
-fpd_dma_chan1: dma@fd500000 {
-	compatible = "xlnx,zynqmp-dma-1.0";
-	reg = <0x0 0xFD500000 0x1000>;
-	interrupt-parent = <&gic>;
-	interrupts = <0 117 4>;
-	clock-names = "clk_main", "clk_apb";
-	xlnx,bus-width = <128>;
-	dma-coherent;
-};