linux-kernel - Re: [PATCH 5/8] dt-bindings: serial: stm32: update rts-gpios and cts-gpios

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Date:   Thu, 31 Dec 2020 13:37:49 -0700
From:   Rob Herring <robh@...nel.org>
To:     Erwan Le Ray <erwan.leray@...s.st.com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Valentin Caron <valentin.caron@...s.st.com>,
        linux-serial@...r.kernel.org, Jiri Slaby <jslaby@...e.com>
Subject: Re: [PATCH 5/8] dt-bindings: serial: stm32: update rts-gpios and
 cts-gpios

On Fri, 18 Dec 2020 20:00:16 +0100, Erwan Le Ray wrote:
> Update rts-gpios and cts-gpios:
> - remove max-items as already defined in serial.yaml
> - add a note describing rts-gpios and cts-gpios usage with stm32
> 
> Document the use of cts-gpios and rts-gpios for flow control in STM32 UART
> controller. These properties can be used instead of 'uart-has-rtscts' or
> 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
> control instead of dedicated pins.
> It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
> 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
> 
> Signed-off-by: Erwan Le Ray <erwan.leray@...s.st.com>
> 

Acked-by: Rob Herring <robh@...nel.org>