linux-kernel - [PATCH 1/5] dt-bindings: dma: ti: k3-bcdma: Add bindings for BCDMA CSI RX

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Message-ID: <20221206043554.1521522-2-vigneshr@ti.com>
Date:   Tue, 6 Dec 2022 10:05:50 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: [PATCH 1/5] dt-bindings: dma: ti: k3-bcdma: Add bindings for BCDMA CSI RX

AM62A SoC has a dedicated BCDMA that serves Camera Serial Interface
(CSI) IP. Add new compatible for the same. Unlike system
BCDMA, this instance only has RX DMA channels and lack TX or block copy
channel. Thus make those properties optional. Additionally CSI RX has
independent power domain, add the binding for the same.

Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
---
 .../devicetree/bindings/dma/ti/k3-bcdma.yaml  | 87 ++++++++++++++-----
 1 file changed, 63 insertions(+), 24 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
index 08627d91e607..d7b5adbb9b2e 100644
--- a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
+++ b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
@@ -32,9 +32,66 @@ allOf:
   - $ref: /schemas/dma/dma-controller.yaml#
   - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,am62a-dmss-bcdma-csirx
+    then:
+      properties:
+        ti,sci-rm-range-bchan: false
+        ti,sci-rm-range-tchan: false
+
+        reg:
+          maxItems: 3
+
+        reg-names:
+          items:
+            - const: gcfg
+            - const: rchanrt
+            - const: ringrt
+
+      required:
+        - compatible
+        - "#dma-cells"
+        - reg
+        - reg-names
+        - msi-parent
+        - ti,sci
+        - ti,sci-dev-id
+        - ti,sci-rm-range-rchan
+        - power-domains
+
+    else:
+      properties:
+        reg:
+          maxItems: 5
+
+        reg-names:
+          items:
+            - const: gcfg
+            - const: bchanrt
+            - const: rchanrt
+            - const: tchanrt
+            - const: ringrt
+
+      required:
+        - compatible
+        - "#dma-cells"
+        - reg
+        - reg-names
+        - msi-parent
+        - ti,sci
+        - ti,sci-dev-id
+        - ti,sci-rm-range-bchan
+        - ti,sci-rm-range-tchan
+        - ti,sci-rm-range-rchan
+
 properties:
   compatible:
-    const: ti,am64-dmss-bcdma
+    enum:
+      - ti,am64-dmss-bcdma
+      - ti,am62a-dmss-bcdma-csirx
 
   "#dma-cells":
     const: 3
@@ -65,19 +122,13 @@ properties:
 
       cell 3: ASEL value for the channel
 
-  reg:
-    maxItems: 5
-
-  reg-names:
-    items:
-      - const: gcfg
-      - const: bchanrt
-      - const: rchanrt
-      - const: tchanrt
-      - const: ringrt
-
   msi-parent: true
 
+  power-domains:
+    description:
+      Power domain if available
+    maxItems: 1
+
   ti,asel:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: ASEL value for non slave channels
@@ -115,18 +166,6 @@ properties:
     items:
       maximum: 0x3f
 
-required:
-  - compatible
-  - "#dma-cells"
-  - reg
-  - reg-names
-  - msi-parent
-  - ti,sci
-  - ti,sci-dev-id
-  - ti,sci-rm-range-bchan
-  - ti,sci-rm-range-tchan
-  - ti,sci-rm-range-rchan
-
 unevaluatedProperties: false
 
 examples:
-- 
2.38.1