linux-kernel - [PATCH v2 1/3] dt-bindings: dma: arm-dma350: update DT binding docs for cix sky1 SoC

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Message-Id: <20251216123026.3519923-2-jun.guo@cixtech.com>
Date: Tue, 16 Dec 2025 20:30:24 +0800
From: Jun Guo <jun.guo@...tech.com>
To: peter.chen@...tech.com,
	fugang.duan@...tech.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	vkoul@...nel.org,
	ychuang3@...oton.com,
	schung@...oton.com,
	robin.murphy@....com
Cc: dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	cix-kernel-upstream@...tech.com,
	linux-arm-kernel@...ts.infradead.org,
	jelly.jia@...tech.com,
	Jun Guo <jun.guo@...tech.com>
Subject: [PATCH v2 1/3] dt-bindings: dma: arm-dma350: update DT binding docs for cix sky1 SoC

Add SoC-specific compatible strings to the DT binding documents to support
cix sky1 SoC.

When adding support for a new SoC that uses the arm dma controller,
future contributors should be encouraged to actually add SoC-specific
compatible strings. The use of the "arm,dma-350" compatible string in
isolation should be disallowed.

Signed-off-by: Jun Guo <jun.guo@...tech.com>
---
 .../devicetree/bindings/dma/arm,dma-350.yaml  | 31 +++++++++++++------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
index 429f682f15d8..78bcc7f9aa8b 100644
--- a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
+++ b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
@@ -14,7 +14,11 @@ allOf:
 
 properties:
   compatible:
-    const: arm,dma-350
+    oneOf:
+      - items:
+          - enum:
+              - cix,sky1-dma-350
+          - const: arm,dma-350
 
   reg:
     items:
@@ -22,15 +26,22 @@ properties:
 
   interrupts:
     minItems: 1
-    items:
-      - description: Channel 0 interrupt
-      - description: Channel 1 interrupt
-      - description: Channel 2 interrupt
-      - description: Channel 3 interrupt
-      - description: Channel 4 interrupt
-      - description: Channel 5 interrupt
-      - description: Channel 6 interrupt
-      - description: Channel 7 interrupt
+    maxItems: 8
+    description: |
+      The DMA controller may be configured with separate interrupts for each channel,
+      or with a single combined interrupt for all channels, depending on the SoC integration.
+    oneOf:
+      - items:
+          - description: Channel 0 interrupt
+          - description: Channel 1 interrupt
+          - description: Channel 2 interrupt
+          - description: Channel 3 interrupt
+          - description: Channel 4 interrupt
+          - description: Channel 5 interrupt
+          - description: Channel 6 interrupt
+          - description: Channel 7 interrupt
+      - items:
+          - description: Combined interrupt shared by all channels
 
   "#dma-cells":
     const: 1
-- 
2.34.1