From: Nora Schiffer <nora.schiffer@ew.tq-group.com>
To: Frank Li <Frank.Li@nxp.com>, Sascha Hauer <s.hauer@pengutronix.de>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev,
linux@ew.tq-group.com, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Nora Schiffer <nora.schiffer@ew.tq-group.com>
Subject: [PATCH] arm64: dts: freescale: imx8mp-tqma8mpql-mba8mp-ras314: fix UART1 RTS/CTS muxing
Date: Wed, 25 Feb 2026 09:34:18 +0100 [thread overview]
Message-ID: <20260225083419.5639-1-nora.schiffer@ew.tq-group.com> (raw)
The pinmuxing for UART1 was mixing DCE and DTE modes, which cannot work.
Consistently use DCE mode.
This switches the RTS and CTS pins, which is fine for this board, as
UART1 is routed to a pin header.
Fixes: ddabb3ce3f90 ("arm64: dts: freescale: add TQMa8MPQL on MBa8MP-RAS314")
Signed-off-by: Nora Schiffer <nora.schiffer@ew.tq-group.com>
---
.../boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts
index b7f69c92b7748..1665a5030b993 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpql-mba8mp-ras314.dts
@@ -848,8 +848,8 @@ pinctrl_tlv320aic3x04: tlv320aic3x04grp {
pinctrl_uart1: uart1grp {
fsl,pins = <MX8MP_IOMUXC_SAI2_RXFS__UART1_DCE_TX 0x14>,
<MX8MP_IOMUXC_SAI2_RXC__UART1_DCE_RX 0x14>,
- <MX8MP_IOMUXC_SAI2_RXD0__UART1_DTE_CTS 0x14>,
- <MX8MP_IOMUXC_SAI2_TXFS__UART1_DTE_RTS 0x14>;
+ <MX8MP_IOMUXC_SAI2_RXD0__UART1_DCE_RTS 0x14>,
+ <MX8MP_IOMUXC_SAI2_TXFS__UART1_DCE_CTS 0x14>;
};
pinctrl_uart1_gpio: uart1gpiogrp {
--
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
https://www.tq-group.com/
next reply other threads:[~2026-02-25 9:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 8:34 Nora Schiffer [this message]
2026-02-25 15:41 ` [PATCH] arm64: dts: freescale: imx8mp-tqma8mpql-mba8mp-ras314: fix UART1 RTS/CTS muxing Frank Li
2026-02-26 8:52 ` Nora Schiffer
2026-02-26 15:14 ` Frank Li
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