[PATCH v1 01/11] arm64: dts: imx8mm-var-som: Move UART4 description to Symphony carrier
Stefano Radaelli
stefano.radaelli21 at gmail.com
Tue Feb 17 10:42:35 PST 2026
From: Stefano Radaelli <stefano.r at variscite.com>
The VAR-SOM-MX8MM 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
imx8mm-var-som-symphony.dts, keeping the SOM dtsi limited to hardware
present on the module itself.
Signed-off-by: Stefano Radaelli <stefano.r at variscite.com>
---
.../dts/freescale/imx8mm-var-som-symphony.dts | 18 ++++++++++++++++++
.../boot/dts/freescale/imx8mm-var-som.dtsi | 18 ------------------
2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
index affbc67c2ef6..819707e6f3bf 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
@@ -11,6 +11,10 @@ / {
model = "Variscite VAR-SOM-MX8MM Symphony evaluation board";
compatible = "variscite,var-som-mx8mm-symphony", "variscite,var-som-mx8mm", "fsl,imx8mm";
+ chosen {
+ stdout-path = &uart4;
+ };
+
reg_usdhc2_vmmc: regulator-usdhc2-vmmc {
compatible = "regulator-fixed";
pinctrl-names = "default";
@@ -156,6 +160,13 @@ &uart3 {
status = "okay";
};
+/* Console */
+&uart4 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart4>;
+ status = "okay";
+};
+
&usbotg1 {
disable-over-current;
extcon = <&extcon_usbotg1>, <&extcon_usbotg1>;
@@ -251,4 +262,11 @@ MX8MM_IOMUXC_UART3_RXD_UART3_DCE_RX 0x140
MX8MM_IOMUXC_UART3_TXD_UART3_DCE_TX 0x140
>;
};
+
+ pinctrl_uart4: uart4grp {
+ fsl,pins = <
+ MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140
+ MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140
+ >;
+ };
};
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
index 190bde4edcd7..b6560c03639e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
@@ -9,10 +9,6 @@
/ {
model = "Variscite VAR-SOM-MX8MM module";
- chosen {
- stdout-path = &uart4;
- };
-
memory at 40000000 {
device_type = "memory";
reg = <0x0 0x40000000 0 0x80000000>;
@@ -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;
@@ -418,13 +407,6 @@ MX8MM_IOMUXC_SAI3_RXD_UART2_DCE_RTS_B 0x140
>;
};
- pinctrl_uart4: uart4grp {
- fsl,pins = <
- MX8MM_IOMUXC_UART4_RXD_UART4_DCE_RX 0x140
- MX8MM_IOMUXC_UART4_TXD_UART4_DCE_TX 0x140
- >;
- };
-
pinctrl_usdhc1: usdhc1grp {
fsl,pins = <
MX8MM_IOMUXC_SD1_CLK_USDHC1_CLK 0x190
--
2.47.3
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