linux-kernel - [PATCH 0/2] serial: add rs485-mux-gpio dt binding and support

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Date:   Mon, 20 Nov 2023 16:10:53 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH 0/2] serial: add rs485-mux-gpio dt binding and support

Some boards are wired so that they support both rs232 and rs485, with
a gpio controlling a mux connecting the SOC's pins to the appropriate
external circuitry. Instead of requiring the application to know about
such details and handle the gpio appropriately, allow it to be
described in device tree and let the serial core code handle it if
present.

Tested on a board based on imx8mp.

Rasmus Villemoes (2):
  dt-bindings: serial: rs485: add rs485-mux-gpios binding
  serial: core: implement support for rs485-mux-gpios

 .../devicetree/bindings/serial/rs485.yaml     |  5 +++
 drivers/tty/serial/serial_core.c              | 35 +++++++++++++++++--
 include/linux/serial_core.h                   |  1 +
 3 files changed, 39 insertions(+), 2 deletions(-)

-- 
2.40.1.1.g1c60b9335d