[PATCH] arm64: zynqmp: Add memory reserved node for k26 Kria SOM board

[Michal Simek]

From: Sharath Kumar Dasari <sharath.kumar.dasari at xilinx.com>

PMUFW (Power Management Unit firmware) requires top 1MB of the lower DDR
memory reserved for its operation, this is missing in k26 SM static dts
file. Bootloader or kernel shouldn't access this location.

Signed-off-by: Sharath Kumar Dasari <sharath.kumar.dasari at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
index c1f21b0e1760..c4774a42d5fc 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
@@ -50,6 +50,17 @@ memory at 0 {
 		reg = <0x0 0x0 0x0 0x80000000>, <0x8 0x00000000 0x0 0x80000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		pmu_region: pmu at 7ff00000 {
+			reg = <0x0 0x7ff00000 0x0 0x100000>;
+			no-map;
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		autorepeat;
-- 
2.36.1