linux-kernel - Re: [PATCH 1/2] dt-bindings: sc16is7xx: Add property to change GPIO function

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Message-ID: <20230517-argue-unbeaten-b07405fdd313@spud>
Date:   Wed, 17 May 2023 18:25:07 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-gpio@...r.kernel.org,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: sc16is7xx: Add property to change GPIO
 function

On Wed, May 17, 2023 at 11:07:46AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> Some variants in this series of uart controllers have GPIO pins that
> are shared between GPIO and modem control lines.
> 
> The pin mux mode (GPIO or modem control lines) can be set for each
> ports (channels) supported by the variant.
> 
> This adds a property to the device tree to set the GPIO pin mux to
> modem control lines on selected ports if needed.
> 
> Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
> ---
>  .../bindings/serial/nxp,sc16is7xx.txt         | 28 +++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> index 0fa8e3e43bf8..426b7285ad50 100644
> --- a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> +++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> @@ -23,6 +23,9 @@ Optional properties:
>      1 = active low.
>  - irda-mode-ports: An array that lists the indices of the port that
>  		   should operate in IrDA mode.
> +- modem-control-line-ports: An array that lists the indices of the port that
> +			    should have shared GPIO lines configured as modem
> +			    control lines.

If this is an NXP specific property, should it not have an nxp, vendor
prefix?


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