* [PATCH v1 1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART
@ 2026-07-22 11:33 Stefano Radaelli
2026-07-27 16:55 ` Frank.Li
0 siblings, 1 reply; 2+ messages in thread
From: Stefano Radaelli @ 2026-07-22 11:33 UTC (permalink / raw)
To: linux-kernel, devicetree, imx, linux-arm-kernel
Cc: pierluigi.p, Stefano Radaelli, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Frank Li, Sascha Hauer, Pengutronix Kernel Team,
Fabio Estevam
From: Stefano Radaelli <stefano.r@variscite.com>
Enable LPUART4 and configure its pin multiplexing to expose the UART
interface on the Symphony expansion header.
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
.../boot/dts/freescale/imx8qm-var-som-symphony.dts | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8qm-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8qm-var-som-symphony.dts
index c7d3073b4041..ec55b86c220d 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-var-som-symphony.dts
@@ -287,6 +287,13 @@ &lpuart2 {
status = "okay";
};
+/* header */
+&lpuart4 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_lpuart4>;
+ status = "okay";
+};
+
&pca9534 {
usb3-signal-route-hog {
gpio-hog;
@@ -428,6 +435,13 @@ IMX8QM_LVDS0_I2C1_SDA_DMA_UART2_RX 0x06000020
>;
};
+ pinctrl_lpuart4: lpuart4grp {
+ fsl,pins = <
+ IMX8QM_M40_GPIO0_01_DMA_UART4_TX 0x06000020
+ IMX8QM_M40_GPIO0_00_DMA_UART4_RX 0x06000020
+ >;
+ };
+
pinctrl_pca9534: pca9534grp {
fsl,pins = <
IMX8QM_MIPI_CSI0_MCLK_OUT_LSIO_GPIO1_IO24 0x00000021
--
2.47.3
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH v1 1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART
2026-07-22 11:33 [PATCH v1 1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART Stefano Radaelli
@ 2026-07-27 16:55 ` Frank.Li
0 siblings, 0 replies; 2+ messages in thread
From: Frank.Li @ 2026-07-27 16:55 UTC (permalink / raw)
To: linux-kernel, devicetree, imx, linux-arm-kernel, Stefano Radaelli
Cc: Frank Li, pierluigi.p, Stefano Radaelli, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Sascha Hauer,
Pengutronix Kernel Team, Fabio Estevam
From: Frank Li <Frank.Li@nxp.com>
On Wed, 22 Jul 2026 13:33:05 +0200, Stefano Radaelli wrote:
> Enable LPUART4 and configure its pin multiplexing to expose the UART
> interface on the Symphony expansion header.
Applied, thanks!
[1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART
commit: 3c45ac08d2897aeb95ceecde25a6d4935c4ab8be
Best regards,
--
Frank Li <Frank.Li@nxp.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-07-22 11:33 [PATCH v1 1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART Stefano Radaelli
2026-07-27 16:55 ` Frank.Li
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