linux-kernel - [PATCH 3/3] arm64: dts: socfpga: agilex5: Add dma-coherent property

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Message-ID: <4517536b397e5c63cac287174fad167a29b2173c.1764143105.git.khairul.anuar.romli@altera.com>
Date: Wed, 26 Nov 2025 16:06:24 +0800
From: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
To: Dinh Nguyen <dinguyen@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
	Vinod Koul <vkoul@...nel.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Niravkumar L Rabara <niravkumar.l.rabara@...el.com>,
	dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mtd@...ts.infradead.org,
	Khairul Anuar Romli <khairul.anuar.romli@...era.com>
Subject: [PATCH 3/3] arm64: dts: socfpga: agilex5: Add dma-coherent property

Add the `dma-coherent` property to these device nodes to inform the
kernel and DMA subsystem that the devices support hardware-managed
cache coherence.

Changes:
 - Add `dma-coherent` to `cdns,hp-nfc`
 - Add `dma-coherent` to both `snps,axi-dma-1.01a` instances
   (dmac0, dmac1)

This aligns the Agilex5 device tree with the coherent DMA-capable
devices accordingly.

Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
---
 arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
index 1f5d560f97b2..d6a2fe445fa6 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
@@ -324,6 +324,7 @@ nand: nand-controller@...80000 {
 			clock-names = "nf_clk";
 			cdns,board-delay-ps = <4830>;
 			iommus = <&smmu 4>;
+			dma-coherent;
 			status = "disabled";
 		};
 
@@ -351,6 +352,7 @@ dmac0: dma-controller@...b0000 {
 			snps,priority = <0 1 2 3>;
 			snps,axi-max-burst-len = <8>;
 			iommus = <&smmu 8>;
+			dma-coherent;
 		};
 
 		dmac1: dma-controller@...c0000 {
@@ -369,6 +371,7 @@ dmac1: dma-controller@...c0000 {
 			snps,priority = <0 1 2 3>;
 			snps,axi-max-burst-len = <8>;
 			iommus = <&smmu 9>;
+			dma-coherent;
 		};
 
 		rst: rstmgr@...11000 {
-- 
2.43.7