Re: [PATCH 1/2] dt-bindings: serial: rs485: Add transceiver interface select GPIO

[Rob Herring (Arm)]

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@xxxxxxxxxxx>
> ---
>  Documentation/devicetree/bindings/serial/rs485.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 

Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>