[PATCH v16 7/7] arm64: dts: imx8ulp-evk: add reserved memory property

[Pankaj Gupta]

Reserve 1MB of DDR memory region due to EdgeLock Enclave's hardware
limitation restricting access to DDR addresses from 0x80000000
to 0xafffffff.

Signed-off-by: Pankaj Gupta <pankaj.gupta at nxp.com>
Reviewed-by: Frank Li <Frank.Li at nxp.com>

---
changes from v15 to v16
- Collected Frank's R-b tag.
---
 arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
index 290a49bea2f7..10aaf02f8ea7 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
- * Copyright 2021 NXP
+ * Copyright 2021, 2025 NXP
  */
 
 /dts-v1/;
@@ -37,6 +37,12 @@ linux,cma {
 			linux,cma-default;
 		};
 
+		ele_reserved: memory at 90000000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x90000000 0 0x100000>;
+			no-map;
+		};
+
 		m33_reserved: noncacheable-section at a8600000 {
 			reg = <0 0xa8600000 0 0x1000000>;
 			no-map;
@@ -259,6 +265,10 @@ &usdhc0 {
 	status = "okay";
 };
 
+&hsm0 {
+	memory-region = <&ele_reserved>;
+};
+
 &fec {
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&pinctrl_enet>;

-- 
2.43.0