From: "Rob Herring (Arm)" <robh@kernel.org>
To: Tapio Reijonen <tapio.reijonen@vaisala.com>
Cc: "Conor Dooley" <conor+dt@kernel.org>,
"Lukas Wunner" <lukas@wunner.de>,
"Jiri Slaby" <jirislaby@kernel.org>,
linux-kernel@vger.kernel.org,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Hugo Villeneuve" <hvilleneuve@dimonoff.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
devicetree@vger.kernel.org,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Lino Sanfilippo" <l.sanfilippo@kunbus.com>,
linux-serial@vger.kernel.org,
"Christoph Niedermaier" <cniedermaier@dh-electronics.com>
Subject: Re: [PATCH 1/2] dt-bindings: serial: rs485: Add transceiver interface select GPIO
Date: Fri, 30 Oct 2026 12:18:33 -0500 [thread overview]
Message-ID: <179338071267.753668.5885694159550862563.robh@kernel.org> (raw)
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 <tapio.reijonen@vaisala.com>
> ---
> Documentation/devicetree/bindings/serial/rs485.yaml | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
next prev parent reply other threads:[~2026-10-30 17:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 5:19 [PATCH 0/2] serial: core: add " Tapio Reijonen
2026-10-21 5:19 ` [PATCH 1/2] dt-bindings: serial: rs485: Add " Tapio Reijonen
2026-10-30 17:18 ` Rob Herring (Arm) [this message]
2026-10-21 5:19 ` [PATCH 2/2] serial: core: Drive the " Tapio Reijonen
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