dt-bindings: dma: pl330: Convert to DT schema

Convert the Arm PL330 DMA controller binding to DT schema.

The '#dma-channels' and '#dma-requests' properties are unused as they are
discoverable and are non-standard (the standard props don't have '#'). So
drop them from the binding.

Cc: Vinod Koul <[e-mail]>
Cc: [e-mail]
Signed-off-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/dma/arm,pl330.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/arm,pl330.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM PrimeCell PL330 DMA Controller
+
+maintainers:
+  - Vinod Koul <[e-mail]>
+
+description:
+  The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
+  between memory and peripherals or memory to memory.
+
+# We need a select here so we don't match all nodes with 'arm,primecell'
+select:
+  properties:
+    compatible:
+      contains:
+        const: arm,pl330
+  required:
+    - compatible
+
+allOf:
+  - $ref: dma-controller.yaml#
+  - $ref: /schemas/arm/primecell.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - arm,pl330
+      - const: arm,primecell
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    maxItems: 32
+    description: A single combined interrupt or an interrupt per event
+
+  '#dma-cells':
+    const: 1
+    description: Contains the DMA request number for the consumer
+
+  arm,pl330-broken-no-flushp:
+    type: boolean
+    description: quirk for avoiding to execute DMAFLUSHP
+
+  arm,pl330-periph-burst:
+    type: boolean
+    description: quirk for performing burst transfer only
+
+  dma-coherent: true
+
+  resets:
+    minItems: 1
+    maxItems: 2
+
+  reset-names:
+    minItems: 1
+    items:
+      - const: dma
+      - const: dma-ocp
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    dma-controller@12680000 {
+        compatible = "arm,pl330", "arm,primecell";
+        reg = <0x12680000 0x1000>;
+        interrupts = <99>;
+        #dma-cells = <1>;
+    };
+...

Documentation/devicetree/bindings/dma/arm-pl330.txt

···
-* ARM PrimeCell PL330 DMA Controller
-
-The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
-between memory and peripherals or memory to memory.
-
-Required properties:
-  - compatible: should include both "arm,pl330" and "arm,primecell".
-  - reg: physical base address of the controller and length of memory mapped
-    region.
-  - interrupts: interrupt number to the cpu.
-
-Optional properties:
-  - dma-coherent      : Present if dma operations are coherent
-  - #dma-cells: must be <1>. used to represent the number of integer
-    cells in the dmas property of client device.
-  - dma-channels: contains the total number of DMA channels supported by the DMAC
-  - dma-requests: contains the total number of DMA requests supported by the DMAC
-  - arm,pl330-broken-no-flushp: quirk for avoiding to execute DMAFLUSHP
-  - arm,pl330-periph-burst: quirk for performing burst transfer only
-  - resets: contains an entry for each entry in reset-names.
-	    See ../reset/reset.txt for details.
-  - reset-names: must contain at least "dma", and optional is "dma-ocp".
-
-Example:
-
-	pdma0: pdma@12680000 {
-		compatible = "arm,pl330", "arm,primecell";
-		reg = <0x12680000 0x1000>;
-		interrupts = <99>;
-		#dma-cells = <1>;
-		#dma-channels = <8>;
-		#dma-requests = <32>;
-	};
-
-Client drivers (device nodes requiring dma transfers from dev-to-mem or
-mem-to-dev) should specify the DMA channel numbers and dma channel names
-as shown below.
-
-  [property name]  = <[phandle of the dma controller] [dma request id]>;
-  [property name]  = <[dma channel name]>
-
-      where 'dma request id' is the dma request number which is connected
-      to the client controller. The 'property name' 'dmas' and 'dma-names'
-      as required by the generic dma device tree binding helpers. The dma
-      names correspond 1:1 with the dma request ids in the dmas property.
-
-  Example:  dmas = <&pdma0 12
-		    &pdma1 11>;
-	    dma-names = "tx", "rx";