linux-kernel - Re: [PATCH v2 1/2] dt-bindings: arm: Add optional interrupt to smc/hvc SCMI transport

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Message-ID: <CA+-6iNxDEPNEnRcp8u5LvZdOgW7gAOqbrPHvfJNertRSxjiqxA@mail.gmail.com>
Date:   Fri, 20 Nov 2020 12:20:14 -0500
From:   Jim Quinlan <james.quinlan@...adcom.com>
To:     Sudeep Holla <sudeep.holla@....com>,
        "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" 
        <bcm-kernel-feedback-list@...adcom.com>,
        Jim Quinlan <james.quinlan@...adcom.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: arm: Add optional interrupt to
 smc/hvc SCMI transport

On Thu, Nov 12, 2020 at 12:56 PM Jim Quinlan <james.quinlan@...adcom.com> wrote:
>
> In normal use of smc/hvc transport in SCMI the message completion is
> indicated by the return of the SMC call.  This commit provides for an
> optional interrupt named "message-serviced" which is used instead to
> indicate the completion of a message.
>
> Signed-off-by: Jim Quinlan <james.quinlan@...adcom.com>
> ---
>  Documentation/devicetree/bindings/arm/arm,scmi.txt | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/arm,scmi.txt b/Documentation/devicetree/bindings/arm/arm,scmi.txt
> index 55deb68230eb..7cdad11f40b1 100644
> --- a/Documentation/devicetree/bindings/arm/arm,scmi.txt
> +++ b/Documentation/devicetree/bindings/arm/arm,scmi.txt
> @@ -31,6 +31,14 @@ Optional properties:
>
>  - mbox-names: shall be "tx" or "rx" depending on mboxes entries.
>
> +- interrupts : when using smc or hvc transports, this optional
> +        property indicates that msg completion by the platform is indicated
> +        by an interrupt rather than by the return of the smc call. This
> +        should not be used except when the platform requires such behavior.
> +
> +- interrupt-names : if "interrupts" is present, interrupt-names must also
> +        be present and have the value "message-serviced".
> +
>  See Documentation/devicetree/bindings/mailbox/mailbox.txt for more details
>  about the generic mailbox controller and client driver bindings.
Hi Rob,

Are you okay with this commit?

Regards,
Jim Quinlan
Broadcom STB
>
> --
> 2.17.1
>

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