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Message-Id: <20250803-p3450-mts-bug-v2-1-6307125408c3@gmail.com>
Date: Sun, 03 Aug 2025 22:14:30 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>
Cc: devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org, Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH v2 1/2] arm64: tegra: Add reserved-memory node for P3450
From: Aaron Kling <webgeek1234@...il.com>
The Tegra210 L4T bootloader ram training will corrupt the in-ram kernel
dt if no reserved-memory node exists. This prevents said bootloader from
being able to boot a kernel without this node, unless a chainloaded
bootloader loads the dt. Add the node to eliminate the requirement for
extra boot stages.
Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
index 0ecdd7243b2eb1abba9adbe9a404b226c29b85ef..8fc995e71696f2ef5e662a21feb96ea771c7a53f 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
@@ -22,6 +22,12 @@ chosen {
stdout-path = "serial0:115200n8";
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ };
+
memory@...00000 {
device_type = "memory";
reg = <0x0 0x80000000 0x1 0x0>;
--
2.50.1
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