[PATCH v4 3/5] dt-bindings: dma: arm,dma-350: Document optional clocks and resets

[Jelly Jia]

Some integrations gate the DMA-350 controller with a bus clock or hold it
in reset. Sky1 provides a clock for both its FCH and AUDSS instances, and
a reset for the AUDSS instance. Document these standard resources on the
DMA controller node.

Neither property is required, so existing device trees are unchanged.

Signed-off-by: Jelly Jia <Jelly.Jia at cixtech.com>
---
 .../devicetree/bindings/dma/arm,dma-350.yaml     | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
index 429f682f15d8..43279878207c 100644
--- a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
+++ b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
@@ -9,9 +9,6 @@ title: Arm CoreLink DMA-350 Controller
 maintainers:
   - Robin Murphy <robin.murphy at arm.com>
 
-allOf:
-  - $ref: dma-controller.yaml#
-
 properties:
   compatible:
     const: arm,dma-350
@@ -36,9 +33,22 @@ properties:
     const: 1
     description: The cell is the trigger input number
 
+  clocks:
+    maxItems: 1
+    description:
+      Optional bus clock, where the integration gates the controller clock.
+
+  resets:
+    maxItems: 1
+    description:
+      Optional reset line, where the integration exposes one.
+
 required:
   - compatible
   - reg
   - interrupts
 
+allOf:
+  - $ref: dma-controller.yaml#
+
 unevaluatedProperties: false
-- 
2.54.0