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

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Message-ID: <20241205145859.2331691-2-mkumard@nvidia.com>
Date: Thu, 5 Dec 2024 20:28:58 +0530
From: Mohan Kumar D <mkumard@...dia.com>
To: <vkoul@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>
CC: <thierry.reding@...il.com>, <jonathanh@...dia.com>, <spujar@...dia.com>,
	<dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Mohan Kumar D
	<mkumard@...dia.com>
Subject: [PATCH 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    | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
index 877147e95ecc..8c76c98560c5 100644
--- a/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
+++ b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.yaml
@@ -29,7 +29,24 @@ 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:
+    oneOf:
+      - enum:
+          - page
+          - global
+      - items:
+          - const: page
+          - const: global
 
   interrupts:
     description: |
-- 
2.25.1