linux-kernel - [PATCH RFC 2/2] arm64: tegra: Add NVIDIA Jetson Nano 2GB Developer Kit support

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Message-Id: <20250608-p3452-v1-2-4c2c1d7e4310@gmail.com>
Date: Sun, 08 Jun 2025 23:24:36 -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 RFC 2/2] arm64: tegra: Add NVIDIA Jetson Nano 2GB Developer
 Kit support

From: Aaron Kling <webgeek1234@...il.com>

This devkit is very similar to P3450, except it has less ram, no display
port, and only 3 usb host ports. Derive from P3450 and disable the
hardware that is unavailable.

Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
 arch/arm64/boot/dts/nvidia/Makefile                |  2 +
 arch/arm64/boot/dts/nvidia/tegra210-p3541-0000.dts | 43 ++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/Makefile b/arch/arm64/boot/dts/nvidia/Makefile
index 0fbb8a494dba5089d9b7243e766bd6028b7f3744..2989550e0d482e0dde09c1ff89930f7eb7b5b644 100644
--- a/arch/arm64/boot/dts/nvidia/Makefile
+++ b/arch/arm64/boot/dts/nvidia/Makefile
@@ -3,6 +3,7 @@
 # Enables support for device-tree overlays
 DTC_FLAGS_tegra210-p2371-2180 := -@
 DTC_FLAGS_tegra210-p3450-0000 := -@
+DTC_FLAGS_tegra210-p3541-0000 := -@
 DTC_FLAGS_tegra186-p2771-0000 := -@
 DTC_FLAGS_tegra186-p3509-0000+p3636-0001 := -@
 DTC_FLAGS_tegra194-p2972-0000 := -@
@@ -18,6 +19,7 @@ dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-0000.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2371-2180.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2571.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p3450-0000.dtb
+dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p3541-0000.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-smaug.dtb
 dtb-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210-p2894-0050-a08.dtb
 dtb-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186-p2771-0000.dtb
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p3541-0000.dts b/arch/arm64/boot/dts/nvidia/tegra210-p3541-0000.dts
new file mode 100644
index 0000000000000000000000000000000000000000..b86bd7f411088df1e48f4c2a61deaeae1f35d23e
--- /dev/null
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3541-0000.dts
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "tegra210-p3450-0000.dts"
+
+/ {
+	model = "NVIDIA Jetson Nano 2GB Developer Kit";
+	compatible = "nvidia,p3541-0000", "nvidia,p3450-0000", "nvidia,tegra210";
+
+	memory@...00000 {
+		reg = <0x0 0x80000000 0x0 0x80000000>;
+	};
+
+	host1x@...00000 {
+		sor@...40000 {
+			status = "disabled";
+		};
+
+		dpaux@...c0000 {
+			status = "disabled";
+		};
+	};
+
+	padctl@...9f000 {
+		ports {
+			usb2-0 {
+				vbus-supply = <&vdd_5v0_sys>;
+			};
+
+			usb2-1 {
+				vbus-supply = <&vdd_5v0_usb>;
+			};
+
+			usb2-2 {
+				vbus-supply = <&vdd_5v0_usb>;
+			};
+
+			usb3-0 {
+				/delete-property/ vbus-supply;
+			};
+		};
+	};
+};

-- 
2.49.0