linux-kernel - [PATCH v2 2/2] arm64: dts: agilex5: add fpga-region and fpga-mgr nodes

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Message-ID: <9a4ce6b2470328b9326402a2f00ff285be1793c3.1763008269.git.khairul.anuar.romli@altera.com>
Date: Thu, 13 Nov 2025 12:43:56 +0800
From: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
To: Moritz Fischer <mdf@...nel.org>,
	Xu Yilun <yilun.xu@...el.com>,
	Tom Rix <trix@...hat.com>,
	Dinh Nguyen <dinguyen@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Mahesh Rao <mahesh.rao@...era.com>,
	Ho Yin <adrian.ho.yin.ng@...era.com>,
	Niravkumar L Rabara <nirav.rabara@...era.com>,
	linux-fpga@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Khairul Anuar Romli <khairul.anuar.romli@...era.com>
Subject: [PATCH v2 2/2] arm64: dts: agilex5: add fpga-region and fpga-mgr nodes

The Intel Agilex 5 SoC contains a programmable FPGA region that requires
proper device tree description to enable FPGA manager support in the Linux
kernel. Without the 'fpga-region' and 'fpga-mgr' nodes, the kernel cannot
detect or manage the FPGA hardware correctly.

This patch adds a 'fpga-region' node with compatible = "fpga-region", along
with appropriate #address-cells and #size-cells properties, to describe the
FPGA region layout.

Also defines specific compatible string for Agilex5 and add Agilex string
as fallback for stratix10-soc driver initialization.

Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
---
Changes in v2:
	- All fallback compatible string to ensure driver is still able to
	  initialize without new compatible string added in the driver.
---
 arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
index bf7128adddde..06be0b8671c0 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
@@ -85,9 +85,21 @@ svc {
 			method = "smc";
 			memory-region = <&service_reserved>;
 			iommus = <&smmu 10>;
+
+			fpga_mgr: fpga-mgr {
+				compatible = "intel,agilex5-soc-fpga-mgr",
+					     "intel,agilex-soc-fpga-mgr";
+			};
 		};
 	};
 
+	fpga-region {
+		compatible = "fpga-region";
+		#address-cells = <0x2>;
+		#size-cells = <0x2>;
+		fpga-mgr = <&fpga_mgr>;
+	};
+
 	psci {
 		compatible = "arm,psci-0.2";
 		method = "smc";
-- 
2.43.7