linux-kernel - Re: [PATCH V3 1/5] dt-bindings: mailbox: allow mbox-cells to be equal to 0

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Date:   Mon, 25 Jun 2018 11:17:34 -0600
From:   Rob Herring <robh@...nel.org>
To:     Dong Aisheng <aisheng.dong@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, dongas86@...il.com,
        kernel@...gutronix.de, shawnguo@...nel.org, fabio.estevam@....com,
        linux-imx@....com, Mark Rutland <mark.rutland@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 1/5] dt-bindings: mailbox: allow mbox-cells to be
 equal to 0

On Fri, Jun 22, 2018 at 10:11:56PM +0800, Dong Aisheng wrote:
> Mailbox devices may have only one channel which means the mbox-cells
> at least 1 does not make sense for this type devices. Let's remove
> that limitation to allow the mbox-cells to be equal to 0.
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Sudeep Holla <sudeep.holla@....com>
> Cc: devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Dong Aisheng <aisheng.dong@....com>
> ---
> ChangeLog:
>  * New patch introduced in v3 series
>  * Actually there're already users in kernel with mbox-cells set to 0.
>    See:
>    arch/arm/boot/dts/bcm283x.dtsi:145: #mbox-cells = <0>;
> ---
>  Documentation/devicetree/bindings/mailbox/mailbox.txt | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

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