linux-kernel - [PATCH] dt-bindings: dma: Convert apm,xgene-storm-dma to DT schema

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Message-ID: <20251013213037.684981-1-robh@kernel.org>
Date: Mon, 13 Oct 2025 16:30:35 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Vinod Koul <vkoul@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Khuong Dinh <khuong@...amperecomputing.com>
Cc: dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: dma: Convert apm,xgene-storm-dma to DT schema

Convert APM X-Gene Storm DMA binding to DT schema format. It's a
straight-forward conversion.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../bindings/dma/apm,xgene-storm-dma.yaml     | 59 +++++++++++++++++++
 .../devicetree/bindings/dma/apm-xgene-dma.txt | 47 ---------------
 2 files changed, 59 insertions(+), 47 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/apm,xgene-storm-dma.yaml
 delete mode 100644 Documentation/devicetree/bindings/dma/apm-xgene-dma.txt

diff --git a/Documentation/devicetree/bindings/dma/apm,xgene-storm-dma.yaml b/Documentation/devicetree/bindings/dma/apm,xgene-storm-dma.yaml
new file mode 100644
index 000000000000..9ca5f7848785
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/apm,xgene-storm-dma.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/apm,xgene-storm-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: APM X-Gene Storm SoC DMA
+
+maintainers:
+  - Khuong Dinh <khuong@...amperecomputing.com>
+
+properties:
+  compatible:
+    const: apm,xgene-storm-dma
+
+  reg:
+    items:
+      - description: DMA control and status registers
+      - description: Descriptor ring control and status registers
+      - description: Descriptor ring command registers
+      - description: SoC efuse registers
+
+  interrupts:
+    items:
+      - description: DMA error reporting interrupt
+      - description: DMA channel 0 completion interrupt
+      - description: DMA channel 1 completion interrupt
+      - description: DMA channel 2 completion interrupt
+      - description: DMA channel 3 completion interrupt
+
+  clocks:
+    maxItems: 1
+
+  dma-coherent: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    dma@...70000 {
+        compatible = "apm,xgene-storm-dma";
+        reg = <0x1f270000 0x10000>,
+              <0x1f200000 0x10000>,
+              <0x1b000000 0x400000>,
+              <0x1054a000 0x100>;
+        interrupts = <0x0 0x82 0x4>,
+                    <0x0 0xb8 0x4>,
+                    <0x0 0xb9 0x4>,
+                    <0x0 0xba 0x4>,
+                    <0x0 0xbb 0x4>;
+        dma-coherent;
+        clocks = <&dmaclk 0>;
+    };
diff --git a/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt b/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt
deleted file mode 100644
index c53e0b08032f..000000000000
--- a/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt
+++ /dev/null
@@ -1,47 +0,0 @@
-Applied Micro X-Gene SoC DMA nodes
-
-DMA nodes are defined to describe on-chip DMA interfaces in
-APM X-Gene SoC.
-
-Required properties for DMA interfaces:
-- compatible: Should be "apm,xgene-dma".
-- device_type: set to "dma".
-- reg: Address and length of the register set for the device.
-  It contains the information of registers in the following order:
-  1st - DMA control and status register address space.
-  2nd - Descriptor ring control and status register address space.
-  3rd - Descriptor ring command register address space.
-  4th - Soc efuse register address space.
-- interrupts: DMA has 5 interrupts sources. 1st interrupt is
-  DMA error reporting interrupt. 2nd, 3rd, 4th and 5th interrupts
-  are completion interrupts for each DMA channels.
-- clocks: Reference to the clock entry.
-
-Optional properties:
-- dma-coherent : Present if dma operations are coherent
-
-Example:
-	dmaclk: dmaclk@...7c000 {
-		compatible = "apm,xgene-device-clock";
-		#clock-cells = <1>;
-		clocks = <&socplldiv2 0>;
-		reg = <0x0 0x1f27c000 0x0 0x1000>;
-		reg-names = "csr-reg";
-		clock-output-names = "dmaclk";
-	};
-
-	dma: dma@...70000 {
-			compatible = "apm,xgene-storm-dma";
-			device_type = "dma";
-			reg = <0x0 0x1f270000 0x0 0x10000>,
-			      <0x0 0x1f200000 0x0 0x10000>,
-			      <0x0 0x1b000000 0x0 0x400000>,
-			      <0x0 0x1054a000 0x0 0x100>;
-			interrupts = <0x0 0x82 0x4>,
-				     <0x0 0xb8 0x4>,
-				     <0x0 0xb9 0x4>,
-				     <0x0 0xba 0x4>,
-				     <0x0 0xbb 0x4>;
-			dma-coherent;
-			clocks = <&dmaclk 0>;
-	};
-- 
2.51.0