linux-kernel - Re: [PATCH 1/2] dt-bindings: firmware: arm,scmi: introduce property mbox-rx-timeout-ms

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Message-ID: <20240627214645.GA614300-robh@kernel.org>
Date: Thu, 27 Jun 2024 15:46:45 -0600
From: Rob Herring <robh@...nel.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, arm-scmi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 1/2] dt-bindings: firmware: arm,scmi: introduce property
 mbox-rx-timeout-ms

On Fri, Jun 21, 2024 at 08:46:57PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> System Controller Management Interface(SCMI) firmwares might have
> different designs by SCMI firmware developers. So the maximum receive
> channel timeout value might also varies in the various designs.
> 
> So introduce property mbox-rx-timeout-ms to let each platform could
> set its own timeout value in device tree.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> index 4d823f3b1f0e..d6cc2bf4c819 100644
> --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> @@ -121,6 +121,12 @@ properties:
>        atomic mode of operation, even if requested.
>      default: 0
>  
> +  max-rx-timeout-ms:
> +    description:
> +      An optional time value, expressed in milliseconds, representing, on this
> +      platform, the mailbox maximum timeout value for receive channel.

"on this platform"? Doesn't every property apply to the given platform?

> +    default: 0

0 means no timeout or response is instant?

> +
>    arm,smc-id:
>      $ref: /schemas/types.yaml#/definitions/uint32
>      description:
> 
> -- 
> 2.37.1
>