linux-kernel - [PATCH v2 1/2] dt-bindings: dma: Support channel page to nvidia,tegra210-adma

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Message-ID: <20241213103939.3851827-2-mkumard@nvidia.com>
Date: Fri, 13 Dec 2024 16:09:38 +0530
From: Mohan Kumar D <mkumard@...dia.com>
To: <vkoul@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>
CC: <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<thierry.reding@...il.com>, <jonathanh@...dia.com>, <spujar@...dia.com>,
	Mohan Kumar D <mkumard@...dia.com>
Subject: [PATCH v2 1/2] dt-bindings: dma: Support channel page to nvidia,tegra210-adma

Multiple ADMA Channel page hardware support has been added from
TEGRA186 and onwards. Update the DT binding to use any of the
ADMA channel page address space region.

Signed-off-by: Mohan Kumar D <mkumard@...dia.com>
---
 .../bindings/dma/nvidia,tegra210-adma.yaml    | 60 +++++++++++++++++--
 1 file changed, 56 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
index 877147e95ecc..d3f8c269916c 100644
--- a/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
+++ b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
@@ -13,9 +13,6 @@ description: |
 maintainers:
   - Jon Hunter <jonathanh@...dia.com>
 
-allOf:
-  - $ref: dma-controller.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -29,7 +26,19 @@ properties:
           - const: nvidia,tegra186-adma
 
   reg:
-    maxItems: 1
+    description:
+      The 'page' region describes the address space of the page
+      used for accessing the DMA channel registers. The 'global'
+      region describes the address space of the global DMA registers.
+      In the absence of the 'reg-names' property, there must be a
+      single entry that covers the address space of the global DMA
+      registers and the DMA channel registers.
+    minItems: 1
+    maxItems: 2
+
+  reg-names:
+    minItems: 1
+    maxItems: 2
 
   interrupts:
     description: |
@@ -63,6 +72,49 @@ required:
   - clocks
   - clock-names
 
+allOf:
+  - $ref: dma-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra210-adma
+    then:
+      properties:
+        reg:
+          items:
+            - description: Full address space range of DMA registers.
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra186-adma
+    then:
+      anyOf:
+        - properties:
+            reg:
+              items:
+                - description: Full address space range of DMA registers.
+        - properties:
+            reg:
+              items:
+                - description: Channel Page address space range of DMA registers.
+            reg-names:
+              items:
+                - const: page
+        - properties:
+            reg:
+              items:
+                - description: Channel Page address space range of DMA registers.
+                - description: Global Page address space range of DMA registers.
+            reg-names:
+              items:
+                - const: page
+                - const: global
+
 additionalProperties: false
 
 examples:
-- 
2.25.1