linux-kernel - Re: [PATCH v4 6/7] dt-bindings: Introduce interconnect consumers bindings

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Message-ID: <20180318224957.GP5626@tuxbook-pro>
Date:   Sun, 18 Mar 2018 15:49:57 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Georgi Djakov <georgi.djakov@...aro.org>
Cc:     linux-pm@...r.kernel.org, gregkh@...uxfoundation.org,
        rjw@...ysocki.net, robh+dt@...nel.org, mturquette@...libre.com,
        khilman@...libre.com, vincent.guittot@...aro.org,
        skannan@...eaurora.org, amit.kucheria@...aro.org,
        seansw@....qualcomm.com, davidai@...cinc.com, mark.rutland@....com,
        lorenzo.pieralisi@....com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4 6/7] dt-bindings: Introduce interconnect consumers
 bindings

On Fri 09 Mar 13:09 PST 2018, Georgi Djakov wrote:

> Add documentation for the interconnect consumer bindings, that will allow
> to link a device node (consumer) to its interconnect controller hardware.
> 
> Tha aim is to enable drivers to request a framework API to configure an
> interconnect path by providing their struct device pointer and a name.
> 
> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
> ---
>  .../bindings/interconnect/interconnect.txt         | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> index 70612bb201e4..7935abf10c4b 100644
> --- a/Documentation/devicetree/bindings/interconnect/interconnect.txt
> +++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> @@ -45,3 +45,26 @@ Examples:
>  			status = "okay";
>  		};
>  
> += interconnect consumers =
> +
> +The interconnect consumers are device nodes which consume the interconnect
> +path(s) provided by the interconnect provider. There can be multiple
> +interconnect providers on a SoC and the consumer may consume multiple paths
> +from different providers depending on usecase and the components it has to
> +interact with.
> +
> +Required-properties:
> +interconnects: Pairs of phandles and interconnect provider specifier to denote
> +		the source and the destination port of the interconnect path.
> +interconnect-names: List of interconnect path name strings sorted in the same
> +		order as the interconnects property. Consumers drivers will use
> +		interconnect-names to match interconnect paths with interconnect
> +		specifiers.

Analog to other subsystems the -names property should be optional, at
least when there's only a single entry in interconnects.

> +
> +Example:
> +
> +	sdhci@...4000 {
> +		...
> +		interconnects = <&pnoc 78 &bimc 512>
> +		interconnect-names = "memory";
> +	};

Regards,
Bjorn