On 2020-02-07 10:47, Sudeep Holla wrote:
On Fri, Feb 07, 2020 at 10:08:36AM +0000, Marc Zyngier wrote:
On 2020-02-06 13:01, peng.fan@xxxxxxx wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> SCMI could use SMC/HVC as tranports, so add into devicetree
> binding doc.
>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
> 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
>
> Optional properties:
Not directly related to DT: Why do we need to distinguish between SMC
and
HVC?
IIUC you want just one property to get the function ID ? Does that
align
with what you are saying ? I wanted to ask the same question and I see
no need for 2 different properties.
Exactly. Using SMC or HVC should come from the context, and there is
zero
value in having different different IDs, depending on the conduit.
We *really* want SMC and HVC to behave the same way. Any attempt to make
them different should just be NAKed.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
