linux-kernel - Re: [PATCH v2 4/6] dt-bindings: misc: atmel-ssc: LRCLK from TF/RF pin option

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Date:   Tue, 27 Aug 2019 17:37:16 -0500
From:   Rob Herring <robh@...nel.org>
To:     Michał Mirosław <mirq-linux@...e.qmqm.pl>
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Arnd Bergmann <arnd@...db.de>,
        Chas Williams <3chas3@...il.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Mark Brown <broonie@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] dt-bindings: misc: atmel-ssc: LRCLK from TF/RF
 pin option

On Sat, Aug 24, 2019 at 10:26:55PM +0200, Michał Mirosław wrote:
> Add single-pin LRCLK source options for Atmel SSC module.
> 
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> 
> ---
>   v2: split from implementation patch
> 
> ---
>  Documentation/devicetree/bindings/misc/atmel-ssc.txt | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
> index f9fb412642fe..c98e96dbec3a 100644
> --- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt
> +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
> @@ -24,6 +24,11 @@ Optional properties:
>         this parameter to choose where the clock from.
>       - By default the clock is from TK pin, if the clock from RK pin, this
>         property is needed.
> +  - atmel,lrclk-from-tf-pin: bool property.
> +  - atmel,lrclk-from-rf-pin: bool property.
> +     - SSC in slave mode gets LRCLK from RF for receive and TF for transmit
> +       data direction. This property makes both use single TF (or RF) pin
> +       as LRCLK. At most one can be present.

A single property taking 1 of possible 2 values would prevent the error 
of more than 1 property present.

>    - #sound-dai-cells: Should contain <0>.
>       - This property makes the SSC into an automatically registered DAI.
>  
> -- 
> 2.20.1
>