linux-kernel - [PATCH 2/2] arm64: dts: agilex5: Use platform-specific compatible for AXI DMA

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Message-ID: <ccc5dbcb9de9dc2ea6c5e46833ce8943b0c2bd52.1763598785.git.khairul.anuar.romli@altera.com>
Date: Thu, 20 Nov 2025 19:31:11 +0800
From: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
To: Dinh Nguyen <dinguyen@...nel.org>,
	Vinod Koul <vkoul@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Khairul Anuar Romli <khairul.anuar.romli@...era.com>
Subject: [PATCH 2/2] arm64: dts: agilex5: Use platform-specific compatible for AXI DMA

Update the compatible string for the DMA controller nodes in the Agilex5
device tree from the generic "snps,axi-dma-1.01a" to the platform-specific
"altr,agilex5-axi-dma". Add fallback capability to ensure driver is able
to initialize properly.

This change enables the use of platform-specific features and constraints
in the driver, such as setting a 40-bit DMA addressable mask, which is
required for Agilex5. It also aligns with the updated device tree bindings
and driver support for this compatible string.

Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
---
 arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
index a5c2025a616e..ef33f27b1a4d 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
@@ -324,7 +324,8 @@ ocram: sram@0 {
 		};
 
 		dmac0: dma-controller@...b0000 {
-			compatible = "snps,axi-dma-1.01a";
+			compatible = "altr,agilex5-axi-dma",
+				     "snps,axi-dma-1.01a";
 			reg = <0x10db0000 0x500>;
 			clocks = <&clkmgr AGILEX5_L4_MAIN_CLK>,
 				 <&clkmgr AGILEX5_L4_MP_CLK>;
@@ -342,7 +343,8 @@ dmac0: dma-controller@...b0000 {
 		};
 
 		dmac1: dma-controller@...c0000 {
-			compatible = "snps,axi-dma-1.01a";
+			compatible = "altr,agilex5-axi-dma",
+				     "snps,axi-dma-1.01a";
 			reg = <0x10dc0000 0x500>;
 			clocks = <&clkmgr AGILEX5_L4_MAIN_CLK>,
 				 <&clkmgr AGILEX5_L4_MP_CLK>;
-- 
2.43.7