From: Stefano Radaelli <stefano.radaelli21@gmail.com>
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 <stefano.r@variscite.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>
Subject: [PATCH v1 1/1] arm64: dts: imx8qm-var-som-symphony: enable expansion header UART
Date: Wed, 22 Jul 2026 13:33:05 +0200 [thread overview]
Message-ID: <20260722113305.28817-1-stefano.r@variscite.com> (raw)
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
next reply other threads:[~2026-07-22 11:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-22 11:33 Stefano Radaelli [this message]
2026-07-27 16:55 ` Frank.Li
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