Message-ID: <7723f351-2460-7378-411a-cfcdf4138d8f@baylibre.com>
Date:   Thu, 12 Apr 2018 15:15:01 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Georgi Djakov <georgi.djakov@...aro.org>, linux-pm@...r.kernel.org,
        gregkh@...uxfoundation.org
Cc:     mark.rutland@....com, lorenzo.pieralisi@....com,
        skannan@...eaurora.org, seansw@....qualcomm.com,
        khilman@...libre.com, mturquette@...libre.com, rjw@...ysocki.net,
        linux-kernel@...r.kernel.org, amit.kucheria@...aro.org,
        bjorn.andersson@...aro.org, robh+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, davidai@...cinc.com,
        vincent.guittot@...aro.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 2/7] dt-bindings: Introduce interconnect provider
 bindings

On 09/03/2018 22:09, Georgi Djakov wrote:
> This binding is intended to represent the interconnect hardware present
> in some of the modern SoCs. Currently it consists only of a binding for
> the interconnect hardware devices (provider).
> 
> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
> ---
>  .../bindings/interconnect/interconnect.txt         | 47 ++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interconnect/interconnect.txt
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> new file mode 100644
> index 000000000000..70612bb201e4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> @@ -0,0 +1,47 @@
> +Interconnect Provider Device Tree Bindings
> +=========================================
> +
> +The purpose of this document is to define a common set of generic interconnect
> +providers/consumers properties.
> +
> +
> += interconnect providers =
> +
> +The interconnect provider binding is intended to represent the interconnect
> +controllers in the system. Each provider registers a set of interconnect
> +nodes, which expose the interconnect related capabilities of the interconnect
> +to consumer drivers. These capabilities can be throughput, latency, priority
> +etc. The consumer drivers set constraints on interconnect path (or endpoints)
> +depending on the usecase. Interconnect providers can also be interconnect
> +consumers, such as in the case where two network-on-chip fabrics interface
> +directly

Hi,

Can't we specify the number of cells for the phandle ? It should be aligned with other consumer/provider bindings.

Neil

> +
> +Required properties:
> +- compatible : contains the interconnect provider vendor specific compatible
> +	       string
> +- reg : register space of the interconnect controller hardware
> +
> +Examples:
> +
> +		snoc: snoc@...000 {
> +			compatible = "qcom,msm8916-snoc";
> +			reg = <0x580000 0x14000>;
> +			clock-names = "bus_clk", "bus_a_clk";
> +			clocks = <&rpmcc RPM_SMD_SNOC_CLK>, <&rpmcc RPM_SMD_SNOC_A_CLK>;
> +			status = "okay";
> +		};
> +		bimc: bimc@...000 {
> +			compatible = "qcom,msm8916-bimc";
> +			reg = <0x400000 0x62000>;
> +			clock-names = "bus_clk", "bus_a_clk";
> +			clocks = <&rpmcc RPM_SMD_BIMC_CLK>, <&rpmcc RPM_SMD_BIMC_A_CLK>;
> +			status = "okay";
> +		};
> +		pnoc: pnoc@...000 {
> +			compatible = "qcom,msm8916-pnoc";
> +			reg = <0x500000 0x11000>;
> +			clock-names = "bus_clk", "bus_a_clk";
> +			clocks = <&rpmcc RPM_SMD_PCNOC_CLK>, <&rpmcc RPM_SMD_PCNOC_A_CLK>;
> +			status = "okay";
> +		};
> +
> 
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