From: Frieder Schrempf <frieder@fris.de>
To: linux-arm-kernel@lists.infradead.org,
Conor Dooley <conor+dt@kernel.org>,
devicetree@vger.kernel.org, Fabio Estevam <festevam@gmail.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
imx@lists.linux.dev, Krzysztof Kozlowski <krzk+dt@kernel.org>,
linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>
Cc: Annette Kobou <annette.kobou@kontron.de>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Pengutronix Kernel Team <kernel@pengutronix.de>
Subject: [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface
Date: Tue, 8 Jul 2025 14:24:41 +0200 [thread overview]
Message-ID: <20250708122442.53829-1-frieder@fris.de> (raw)
From: Annette Kobou <annette.kobou@kontron.de>
The polarity of the DE signal of the transceiver is active-high for
sending. Therefore rs485-rts-active-low is wrong and needs to be
removed to make RS485 transmissions work.
Signed-off-by: Annette Kobou <annette.kobou@kontron.de>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N6310 SoM and boards")
---
arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
index 29d2f86d5e34a..f4c45e964daf8 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
@@ -168,7 +168,6 @@ &uart2 {
pinctrl-0 = <&pinctrl_uart2>;
linux,rs485-enabled-at-boot-time;
rs485-rx-during-tx;
- rs485-rts-active-low;
uart-has-rtscts;
status = "okay";
};
--
2.50.0
next reply other threads:[~2025-07-08 12:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-08 12:24 Frieder Schrempf [this message]
2025-07-11 8:05 ` [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface Shawn Guo
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