linux-kernel - [PATCH v3 1/3] dt-bindings: dma: snps,dw-axi-dmac: constrain minItems/maxItems of resets for JH7110 DMA

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Date:   Mon, 27 Feb 2023 21:10:40 +0800
From:   Walker Chen <walker.chen@...rfivetech.com>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        "Emil Renner Berthing" <emil.renner.berthing@...onical.com>,
        Walker Chen <walker.chen@...rfivetech.com>
CC:     <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
Subject: [PATCH v3 1/3] dt-bindings: dma: snps,dw-axi-dmac: constrain minItems/maxItems of resets for JH7110 DMA

The DMA controller needs two reset items to work properly on JH7110 SoC,
so there is need to change the maxItems' value to 2 and add minItems
whose value is equal to 1. Other platforms do not have this constraint.

Signed-off-by: Walker Chen <walker.chen@...rfivetech.com>
---
 .../bindings/dma/snps,dw-axi-dmac.yaml        | 25 ++++++++++++++++---
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
index ad107a4d3b33..4ed0a6b7ca69 100644
--- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
+++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
@@ -12,14 +12,12 @@ maintainers:
 description:
   Synopsys DesignWare AXI DMA Controller DT Binding
 
-allOf:
-  - $ref: "dma-controller.yaml#"
-
 properties:
   compatible:
     enum:
       - snps,axi-dma-1.01a
       - intel,kmb-axi-dma
+      - starfive,jh7110-axi-dma
 
   reg:
     minItems: 1
@@ -58,7 +56,8 @@ properties:
     maximum: 8
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
 
   snps,dma-masters:
     description: |
@@ -109,6 +108,24 @@ required:
   - snps,priority
   - snps,block-size
 
+allOf:
+  - $ref: "dma-controller.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - starfive,jh7110-axi-dma
+    then:
+      properties:
+        resets:
+          minItems: 1
+          maxItems: 2
+    else:
+      properties:
+        resets:
+          maxItems: 1
+
 additionalProperties: false
 
 examples:
-- 
2.17.1