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From:   Peng Fan <peng.fan@nxp.com>
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Subject: RE: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports
Thread-Topic: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports
Thread-Index: AQHV3O5LIqtUB1cLq0qKBDDFKN5B7qgToH9A
Date:   Mon, 10 Feb 2020 00:59:43 +0000
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> Subject: [PATCH 1/2] dt-bindings: arm: arm,scmi: add smc/hvc transports
>=20
> From: Peng Fan <peng.fan@nxp.com>
>=20
> SCMI could use SMC/HVC as tranports, so add into devicetree binding doc.
>=20
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  Documentation/devicetree/bindings/arm/arm,scmi.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>=20
> 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:
>=20
>  The scmi node with the following properties shall be under the /firmware=
/
> node.
>=20
> -- compatible : shall be "arm,scmi"
> +- compatible : shall be "arm,scmi" or "arm,scmi-smc"

One question here, are you fine with compatible "arm,scmi-smc" or
add a new property 'transport' such as:
transport =3D "mailbox"; for mailbox
transport =3D "smc"; for smc and hvc.

Thanks,
Peng.

>  - mboxes: List of phandle and mailbox channel specifiers. It should cont=
ain
>  	  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
>=20
>  Optional properties:
>=20
> --
> 2.16.4