From nobody Tue Oct 7 16:36:40 2025 Received: from mail.fris.de (mail.fris.de [116.203.77.234]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 48F12220F4C; Tue, 8 Jul 2025 12:33:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=116.203.77.234 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751978035; cv=none; b=L5d907MjQEF8Bgy3mjxdk0AGJc1aoXm7dQMEfjmHQ0CGaaNwoM8RMQczMVC8CAix/euDZ84bBHIoHr3aPC9EYCSq7cpJzX6LE5wsDUI3jiaVX3QhThJHfSchpi4OCm73SrXJIMs7SFD2rNl61DTjG89b9+js2iVG4PwNmL1zQic= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751978035; c=relaxed/simple; bh=Q3tJWIilQ0iJY5+kliXfDSnxi36CekbAmJqE7zcWYeg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=nQaYY+f3pQpQlOjTq0ACiT03kXjjMZ4PlN4HGbsnfOc21ryHH41ndSPYM2ADeEdsxSNEGqwfX+VA9DTuNrRNiVHabMchJGQ+ovYwcmebiWnnDMNe4xQdo89dmpu/y5YauabDsMFf/KAcjbaPpgAxpuHwIw/7kib2zXFenhoAHw8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fris.de; spf=pass smtp.mailfrom=fris.de; dkim=pass (2048-bit key) header.d=fris.de header.i=@fris.de header.b=TNRJk09U; arc=none smtp.client-ip=116.203.77.234 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fris.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fris.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fris.de header.i=@fris.de header.b="TNRJk09U" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 975D2C74C1; Tue, 8 Jul 2025 14:26:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fris.de; s=dkim; t=1751977608; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding; bh=Rp56DHgQi9XN3i0LEDzYAoCZSiBnN1Rn4E3S+pjit7M=; b=TNRJk09U9t0QZ+9wGXAay+FMGk2pHDadpBKz+mFUBbZ96kue5imLy3YG9iEstvxPpOgAgR mnJLm2VlWrhPPpQm2qbk7Ny+j+guPm5op7yoqsSkauRMg+UYxd5VyNtwTZpIqILcFtGsOd 82NHEfCOi9c9QSxd/07vNsreHn4ylPJtQljwyAOot0rTTtVkA5Z+/lGBz4KZQjuS5MWoe2 q9QkYUVJSjgnDyYejT7blpVEabjWONQuMfvhAanN0FuU7TAaOlpm/jq+HaRX7GJvbWZAkw UY0Pnzl0NRv9xQsrhbxEFD+OcxnKRMUeA0K8QHotUkDeExATzpZll8jfnb6lPw== From: Frieder Schrempf To: linux-arm-kernel@lists.infradead.org, Conor Dooley , devicetree@vger.kernel.org, Fabio Estevam , Frieder Schrempf , imx@lists.linux.dev, Krzysztof Kozlowski , linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , Shawn Guo Cc: Annette Kobou , Krzysztof Kozlowski , Pengutronix Kernel Team Subject: [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface Date: Tue, 8 Jul 2025 14:24:41 +0200 Message-ID: <20250708122442.53829-1-frieder@fris.de> X-Mailer: git-send-email 2.50.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Content-Type: text/plain; charset="utf-8" From: Annette Kobou 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 Signed-off-by: Frieder Schrempf Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N= 6310 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 =3D <&pinctrl_uart2>; linux,rs485-enabled-at-boot-time; rs485-rx-during-tx; - rs485-rts-active-low; uart-has-rtscts; status =3D "okay"; }; --=20 2.50.0