linux-kernel - Re: [RFC PATCH v2 2/6] dt-bindings: add bindings for Samsung micro-USB 11-pin connector

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Message-ID: <20180219143234.5k47c5sihqwuwwqw@rob-hp-laptop>
Date:   Mon, 19 Feb 2018 08:32:34 -0600
From:   Rob Herring <robh@...nel.org>
To:     Andrzej Hajda <a.hajda@...sung.com>
Cc:     "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        dri-devel@...ts.freedesktop.org, Inki Dae <inki.dae@...sung.com>,
        Mark Rutland <mark.rutland@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Archit Taneja <architt@...eaurora.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [RFC PATCH v2 2/6] dt-bindings: add bindings for Samsung
 micro-USB 11-pin connector

On Thu, Feb 15, 2018 at 11:39:16AM +0100, Andrzej Hajda wrote:
> Samsung micro-USB 11-pin connector beside standard micro-USB pins,
> has pins dedicated to route MHL traffic.
> 
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> ---
>  .../connector/samsung,usb-connector-11pin.txt      | 51 ++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/connector/samsung,usb-connector-11pin.txt
> 
> diff --git a/Documentation/devicetree/bindings/connector/samsung,usb-connector-11pin.txt b/Documentation/devicetree/bindings/connector/samsung,usb-connector-11pin.txt
> new file mode 100644
> index 000000000000..c8ef1ad6732f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/connector/samsung,usb-connector-11pin.txt
> @@ -0,0 +1,51 @@
> +Samsung micro-USB 11-pin connector
> +==================================
> +
> +Samsung micro-USB 11-pin connector is an extension of micro-USB connector.
> +It is present in multiple Samsung mobile devices.
> +It has additional pins to route MHL traffic simultanously with USB.
> +
> +The bindings are superset of usb-connector bindings for micro-USB connector[1].
> +
> +Required properties:
> +- compatible: must be: "samsung,usb-connector-11pin", "usb-b-connector",
> +- type: must be "micro".
> +
> +Optional properties:
> +- label: symbolic name for the connector.

This is already defined in [1] so you don't need it here.

Otherwise,

Reviewed-by: Rob Herring <robh@...nel.org>

> +
> +Required nodes:
> +- any data bus to the connector should be modeled using the OF graph bindings
> +  specified in bindings/graph.txt, unless the bus is between parent node and
> +  the connector. Since single connector can have multpile data buses every bus
> +  has assigned OF graph port number as follows:
> +    0: High Speed (HS),
> +    3: Mobile High-Definition Link (MHL), specific to 11-pin Samsung micro-USB.
> +
> +[1]: bindings/connector/usb-connector.txt
> +
> +Example
> +-------
> +
> +Micro-USB connector with HS lines routed via controller (MUIC) and :
> +
> +muic-max77843@66 {
> +	...
> +	usb_con: connector {
> +		compatible = "samsung,usb-connector-11pin", "usb-b-connector";
> +		label = "micro-USB";
> +		type = "micro";
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@3 {
> +				reg = <3>;
> +				usb_con_mhl: endpoint {
> +					remote-endpoint = <&sii8620_mhl>;
> +				};
> +			};
> +		};
> +	};
> +};
> -- 
> 2.16.1
>