linux-kernel - [PATCH v4 1/3] dt-bindings: dma: snps,dw-axi-dmac: constrain resets items for JH7110 dma

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Message-ID: <20230306140430.28951-2-walker.chen@starfivetech.com>
Date:   Mon, 6 Mar 2023 22:04:28 +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 v4 1/3] dt-bindings: dma: snps,dw-axi-dmac: constrain resets items for JH7110 dma

The DMA controller needs two reset items to work properly on JH7110 SoC,
so there is need to constrain the items' value to 2, other platforms
have 1 reset item at most.

Signed-off-by: Walker Chen <walker.chen@...rfivetech.com>
---
 .../bindings/dma/snps,dw-axi-dmac.yaml        | 24 +++++++++++++++----
 1 file changed, 20 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..d8b5439f215c 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 +108,23 @@ required:
   - snps,priority
   - snps,block-size
 
+allOf:
+  - $ref: "dma-controller.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - starfive,jh7110-axi-dma
+    then:
+      properties:
+        resets:
+          minItems: 2
+    else:
+      properties:
+        resets:
+          maxItems: 1
+
 additionalProperties: false
 
 examples:
-- 
2.17.1