From: Rob Herring <robh@kernel.org>
To: Lukas Wunner <lukas@wunner.de>
Cc: devicetree@vger.kernel.org, Jan Kiszka <jan.kiszka@siemens.com>,
"Matwey V. Kornilov" <matwey@sai.msu.ru>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Christoph Muellner <christoph.muellner@theobroma-systems.com>,
Jiri Slaby <jslaby@suse.com>,
linux-serial@vger.kernel.org, Heiko Stuebner <heiko@sntech.de>,
Giulio Benetti <giulio.benetti@micronovasrl.com>,
Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v3 1/2] dt-bindings: serial: Add binding for rs485 bus termination GPIO
Date: Thu, 28 May 2020 14:50:36 -0600 [thread overview]
Message-ID: <20200528205036.GA653137@bogus> (raw)
In-Reply-To: <4f4411895dc52c846f766e7f7207ec412c4811b6.1589811297.git.lukas@wunner.de>
On Mon, 18 May 2020 16:45:01 +0200, Lukas Wunner wrote:
> Commit e8759ad17d41 ("serial: uapi: Add support for bus termination")
> introduced the ability to enable rs485 bus termination from user space.
> So far the feature is only used by a single driver, 8250_exar.c, using a
> hardcoded GPIO pin specific to Siemens IOT2040 products.
>
> Provide for a more generic solution by allowing specification of an
> rs485 bus termination GPIO pin in the device tree. An upcoming commit
> implements support for this pin for any 8250 driver. The binding is
> used in device trees of the "Revolution Pi" PLCs offered by KUNBUS.
>
> [Heiko Stuebner converted the binding to YAML, hence his Signed-off-by.]
>
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> Signed-off-by: Lukas Wunner <lukas@wunner.de>
> Cc: Jan Kiszka <jan.kiszka@siemens.com>
> ---
> Documentation/devicetree/bindings/serial/rs485.yaml | 4 ++++
> 1 file changed, 4 insertions(+)
>
Reviewed-by: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2020-05-28 20:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 14:45 [PATCH v3 0/2] rs485 bus termination GPIO Lukas Wunner
2020-05-18 14:45 ` [PATCH v3 1/2] dt-bindings: serial: Add binding for " Lukas Wunner
2020-05-28 20:50 ` Rob Herring [this message]
2020-05-18 14:45 ` [PATCH v3 2/2] serial: 8250: Support " Lukas Wunner
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