linux-kernel - RE: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports

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Message-ID: <AM0PR04MB4481D3F304E1F17FAFE8D592881C0@AM0PR04MB4481.eurprd04.prod.outlook.com>
Date:   Fri, 7 Feb 2020 08:10:01 +0000
From:   Peng Fan <peng.fan@....com>
To:     Rob Herring <robh@...nel.org>
CC:     "sudeep.holla@....com" <sudeep.holla@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "andre.przywara@....com" <andre.przywara@....com>
Subject: RE: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports

> Subject: Re: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports
> 
> On Thu, Feb 06, 2020 at 09:01:25PM +0800, peng.fan@....com wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > SCMI could use SMC/HVC as tranports, so add into devicetree binding
> > doc.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  Documentation/devicetree/bindings/arm/arm,scmi.txt | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/arm,scmi.txt
> > b/Documentation/devicetree/bindings/arm/arm,scmi.txt
> > index f493d69e6194..03cff8b55a93 100644
> > --- a/Documentation/devicetree/bindings/arm/arm,scmi.txt
> > +++ b/Documentation/devicetree/bindings/arm/arm,scmi.txt
> > @@ -14,7 +14,7 @@ Required properties:
> >
> >  The scmi node with the following properties shall be under the /firmware/
> node.
> >
> > -- compatible : shall be "arm,scmi"
> > +- compatible : shall be "arm,scmi" or "arm,scmi-smc"
> >  - mboxes: List of phandle and mailbox channel specifiers. It should contain
> >  	  exactly one or two mailboxes, one for transmitting messages("tx")
> >  	  and another optional for receiving the notifications("rx") if @@
> > -25,6 +25,8 @@ The scmi node with the following properties shall be under
> the /firmware/ node.
> >  	  protocol identifier for a given sub-node.
> >  - #size-cells : should be '0' as 'reg' property doesn't have any size
> >  	  associated with it.
> > +- arm,smc-id : SMC id required when using smc transports
> > +- arm,hvc-id : HVC id required when using hvc transports
> 
> Don't the SMC ids get standardized?

For now, there is no standard SCMI SMC/HVC ID.

Sudeep, Is there any plan from ARM? Or how you think about this patch?

Thanks,
Peng.

> 
> >
> >  Optional properties:
> >
> > --
> > 2.16.4
> >