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 <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211217170644.3145332-1-robh@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

1 files changed, 83 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/dma/arm,pl330.yaml b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
new file mode 100644
index 000000000000..decab185cf4d
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
@@ -0,0 +1,83 @@
+# 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 <vkoul@kernel.org>
+
+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>;
+    };
+...