From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793380717; b=Kg3gLXaQaL/Zj1Z5+TwVffVSWkGJPmslrTIRur5p/ZhKCj7B7Qdgb0s4xRzg+OHKkAfm FvzPaAd3RiePvFT0UZa1/H5nHf0wRSCzz0UmlLto05KkNnyso5SCZ1JJfGQo2OGKDi8V6 eNHG7G8ti9bQUUpTE6HwU2WbqwMe82EZKvUsP57yA7sfZ3fqK4psX1bqHW6cDhfVwva2e OFHslALuNLYqc73VpZuhDjdiQKSdujZKwQs8jvfHL8mH94NwoiRlzXeg8K73IRXb8DoFL GTob7MaJpm2uPM2esZqhcISI+/yfSZYY25btH1uQrCfweXRw/ieQ7dnY8u51opbpuxw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793380717; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=f0J1NexokFrsbt6L2QLM1JqYkGp3ZtPOpWlDKM8B44E=; b=h9gNs5AH23fr5b9hCyw8s1X83R6XDmyDSEhcQTDwDUL4mTJpdSBbZ33eBMKCTyZ9vs1f UNuzJDcY/b+2lsNOe6bfWNui6lzpMNZuwNvoaKTp+dCuGSQu+t+8fL3XICcCdRphuS+g9 ZkqKP4uMrhl8O/NaDVxuKFUIi9sB2Jg+7uouGEugyvYxrojv3vvYpj+uCGFfFJ3EM1Q20 71eI7M2iVDChzTV9o4xBwS8IiJjsH2RXDzVmqbQGVAAbcFlyFaP9V0YisEZ4OjnF4pe/h wcBm9UHaPVF9IdXMYdEIdl+yxn5RYvzORakFl9eIeV9YNKycxssXbj6bf6lYYsA0tXw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=CuIMhy4G; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DD4A606A31A; Fri, 30 Oct 2026 17:18:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=CuIMhy4G Received: by smtp.kernel.org (Postfix) with ESMTPSA id 511871F000C1; Fri, 30 Oct 2026 17:18:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793380716; bh=f0J1NexokFrsbt6L2QLM1JqYkGp3ZtPOpWlDKM8B44E=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=CuIMhy4GI7rovRb0LKJ/w0uvcgQGG31/MtOwSXy+CF156tTmXRYiGmxQJWm5cXAK6 dvqjM+MVjw/9yv3nqAW3A2CxVa38UAuUy4J8TTZMQjYuzHV03b7t56HYI5SFPyiAQc joaAV47H7q2MCyis5ZSPJ20YFnMSHOOaJSEaQxvh9zpdL2ycrQvSPSFRdb+qOn7OKb cmYYCDflFkQhB9MyJh+BdBExVXQhElxIP2tYa6/BLZJ0Q6Bg4wGJ0kk2pz3AwkU+x8 t+ypeHDzLKXDHDq3Ow0XNfnawK42/x42M8Sq/I4Y4eThuc1ZN/GU79SoAUF6nDkNcM GbqA76Ut57HYg== Date: Fri, 30 Oct 2026 12:18:33 -0500 From: "Rob Herring (Arm)" To: Tapio Reijonen Cc: Conor Dooley , Lukas Wunner , Jiri Slaby , linux-kernel@vger.kernel.org, Ilpo =?iso-8859-1?Q?J=E4rvinen?= , Hugo Villeneuve , Greg Kroah-Hartman , devicetree@vger.kernel.org, Krzysztof Kozlowski , Lino Sanfilippo , linux-serial@vger.kernel.org, Christoph Niedermaier Subject: Re: [PATCH 1/2] dt-bindings: serial: rs485: Add transceiver interface select GPIO Message-ID: <179338071267.753668.5885694159550862563.robh@kernel.org> References: <20261021-serial-rs485-mode-gpio-v1-0-80d7b0903d93@vaisala.com> <20261021-serial-rs485-mode-gpio-v1-1-80d7b0903d93@vaisala.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261021-serial-rs485-mode-gpio-v1-1-80d7b0903d93@vaisala.com> On Wed, 21 Oct 2026 05:19:38 +0000, Tapio Reijonen wrote: > Multiprotocol transceivers such as the LTC2873 provide both an RS232 > and an RS485 interface on the same bus pins and choose between them > with an interface select input: on the LTC2873 a logic low on the > 485/232 pin enables RS232 mode and a high enables RS485 mode. > > Add an optional rs485-select-gpios property for that input, next to > the existing rs485-term-gpios and rs485-rx-during-tx-gpios. The active > state selects the RS485 interface, the inactive state selects the > transceiver's alternative interface, RS232 on the LTC2873. > > Assisted-by: LLM > Signed-off-by: Tapio Reijonen > --- > Documentation/devicetree/bindings/serial/rs485.yaml | 8 ++++++++ > 1 file changed, 8 insertions(+) > Reviewed-by: Rob Herring (Arm)