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.

It also defines the 'fpga_mgr' node with compatible =
"intel,agilex5-soc-fpga-mgr" and links it from the 'fpga-region' node
via the 'fpga-mgr' property.

Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
---
 arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
index bf7128adddde..10dd8ec641cc 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi
@@ -85,9 +85,20 @@ svc {
 			method = "smc";
 			memory-region = <&service_reserved>;
 			iommus = <&smmu 10>;
+
+			fpga_mgr: fpga-mgr {
+				compatible = "intel,agilex5-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