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[93.144.65.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-493c6375764sm314379715e9.5.2026.07.06.02.34.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 02:34:51 -0700 (PDT) From: Stefano Radaelli X-Google-Original-From: Stefano Radaelli To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: pierluigi.p@variscite.com, Stefano Radaelli , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley Subject: [PATCH v2 01/15] arm64: dts: freescale: imx8mn-var-som: Move UART4 description to Symphony Date: Mon, 6 Jul 2026 11:34:31 +0200 Message-ID: <3ddf65049a048dc4760df1e8ae5af4d3e91ca77f.1783330236.git.stefano.r@variscite.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: 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: Stefano Radaelli The VAR-SOM-MX8MN module does not provide an onboard debug console. UART4 is routed and exposed only on the Symphony carrier board, while custom carrier designs may choose to expose a different UART. Move the UART4 node from the SOM device tree to the imx8mn-var-som-symphony.dts, keeping the SOM dtsi limited to hardware present on the module itself. Signed-off-by: Stefano Radaelli --- v1->v2: - .../dts/freescale/imx8mn-var-som-symphony.dts | 18 ++++++++++++++++++ .../boot/dts/freescale/imx8mn-var-som.dtsi | 18 ------------------ 2 files changed, 18 insertions(+), 18 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts index 3434b189fa58..b07e71d3adee 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts +++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts @@ -15,6 +15,10 @@ / { model = "Variscite VAR-SOM-MX8MN Symphony evaluation board"; compatible = "variscite,var-som-mx8mn-symphony", "variscite,var-som-mx8mn", "fsl,imx8mn"; + chosen { + stdout-path = &uart4; + }; + reg_usdhc2_vmmc: regulator-usdhc2-vmmc { compatible = "regulator-fixed"; pinctrl-names = "default"; @@ -171,6 +175,13 @@ &uart3 { status = "okay"; }; +/* Console */ +&uart4 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart4>; + status = "okay"; +}; + &usbotg1 { dr_mode = "otg"; hnp-disable; @@ -234,4 +245,11 @@ MX8MN_IOMUXC_UART3_RXD_UART3_DCE_RX 0x140 MX8MN_IOMUXC_UART3_TXD_UART3_DCE_TX 0x140 >; }; + + pinctrl_uart4: uart4grp { + fsl,pins = < + MX8MN_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140 + MX8MN_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140 + >; + }; }; diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi index 38ef9e4fdf07..32f101ef2850 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi @@ -11,10 +11,6 @@ / { model = "Variscite VAR-SOM-MX8MN module"; compatible = "variscite,var-som-mx8mn", "fsl,imx8mn"; - chosen { - stdout-path = &uart4; - }; - memory@40000000 { device_type = "memory"; reg = <0x0 0x40000000 0 0x40000000>; @@ -274,13 +270,6 @@ &uart2 { status = "okay"; }; -/* Console */ -&uart4 { - pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_uart4>; - status = "okay"; -}; - &usbotg1 { dr_mode = "otg"; usb-role-switch; @@ -432,13 +421,6 @@ MX8MN_IOMUXC_SAI3_RXD_UART2_DCE_RTS_B 0x140 >; }; - pinctrl_uart4: uart4grp { - fsl,pins = < - MX8MN_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140 - MX8MN_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140 - >; - }; - pinctrl_usdhc1: usdhc1grp { fsl,pins = < MX8MN_IOMUXC_SD1_CLK_USDHC1_CLK 0x190 -- 2.47.3