[PATCH v3 10/11] arm64: dts: Add common include for i.MX93 ELE firmware

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf at kontron.de>

To make it easier for boards to configure the EdgeLock Secure Enclave
on i.MX93, add a common include file that contains sane defaults. It
specifies the memory node, enables the ELE firmware node and adds a
reference to NVMEM OCOTP driver.

The 1MB memory area required for the firmware is placed in the first
256MB of the DDR. Boards that require a more specific alignment can
override this accordingly.

Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
---
 arch/arm64/boot/dts/freescale/imx93-firmware.dtsi | 28 +++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-firmware.dtsi b/arch/arm64/boot/dts/freescale/imx93-firmware.dtsi
new file mode 100644
index 000000000000..58614158ef90
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-firmware.dtsi
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2026 Kontron Electronics GmbH
+ */
+
+/{
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ele_memory: ele-memory {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0 0x80000000 0 0x10000000>;
+			size = <0 0x100000>;
+			no-map;
+		};
+	};
+};
+
+&hsm0 {
+	status = "okay";
+	memory-region = <&ele_memory>;
+};
+
+&ocotp {
+	secure-enclave = <&hsm0>;
+};

-- 
2.55.0