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[176.79.113.208]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490454a0cd5sm52220755e9.10.2026.05.22.06.20.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2026 06:20:49 -0700 (PDT) From: Vitor Soares To: Laurent Pinchart , Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Lad Prabhakar , Thierry Reding Cc: Vitor Soares , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 08/11] arm64: dts: ti: k3-am62-verdin: Reserve UART_4 for Cortex-M4F Date: Fri, 22 May 2026 14:20:21 +0100 Message-ID: <20260522132014.226721-21-ivitro@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260522132014.226721-13-ivitro@gmail.com> References: <20260522132014.226721-13-ivitro@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Vitor Soares Add a device tree overlay reserving AM62 MCU_UART0 (Verdin UART_4) for use by the Cortex-M4F co-processor as its debug UART. Assisted-by: Claude:claude-sonnet-4.6 Signed-off-by: Vitor Soares --- arch/arm64/boot/dts/ti/Makefile | 4 ++++ .../boot/dts/ti/k3-am625-verdin-uart4-mcu.dtso | 13 +++++++++++++ 2 files changed, 17 insertions(+) create mode 100644 arch/arm64/boot/dts/ti/k3-am625-verdin-uart4-mcu.dtso diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile index a1083c0b2502..31c9bc1d48b1 100644 --- a/arch/arm64/boot/dts/ti/Makefile +++ b/arch/arm64/boot/dts/ti/Makefile @@ -44,6 +44,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-zinnia.dtb dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-10inch-dsi.dtbo dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-10inch-lvds.dtbo dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-7inch-dsi.dtbo +dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-uart4-mcu.dtbo dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia-dsi-to-hdmi.dtb dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi.dtb dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia.dtb @@ -230,6 +231,8 @@ k3-am625-verdin-wifi-dev-nau8822-btl-dtbs := k3-am625-verdin-wifi-dev.dtb \ k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi-dtbs := \ k3-am625-verdin-wifi-dev.dtb \ k3-am625-verdin-panel-cap-touch-7inch-dsi.dtbo +k3-am625-verdin-wifi-dev-uart4-mcu-dtbs := k3-am625-verdin-wifi-dev.dtb \ + k3-am625-verdin-uart4-mcu.dtbo k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds-dtbs := \ k3-am625-verdin-wifi-mallow.dtb \ k3-am625-verdin-panel-cap-touch-10inch-lvds.dtbo @@ -337,6 +340,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \ k3-am625-verdin-wifi-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb \ k3-am625-verdin-wifi-dev-nau8822-btl.dtb \ k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi.dtb \ + k3-am625-verdin-wifi-dev-uart4-mcu.dtb \ k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds.dtb \ k3-am62-lp-sk-hdmi-audio.dtb \ k3-am62-lp-sk-nand.dtb \ diff --git a/arch/arm64/boot/dts/ti/k3-am625-verdin-uart4-mcu.dtso b/arch/arm64/boot/dts/ti/k3-am625-verdin-uart4-mcu.dtso new file mode 100644 index 000000000000..e263809cdf74 --- /dev/null +++ b/arch/arm64/boot/dts/ti/k3-am625-verdin-uart4-mcu.dtso @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0-or-later OR MIT +/* + * Copyright (c) Toradex + * + * Verdin AM62 Cortex-M4F debug UART + */ + +/dts-v1/; +/plugin/; + +&mcu_uart0 { + status = "reserved"; +}; -- 2.54.0