From patchwork Fri Nov 2 15:47:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 52723 X-Patchwork-Delegate: sakari.ailus@iki.fi Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gIbg8-0000Q5-Te; Fri, 02 Nov 2018 15:48:09 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727805AbeKCAzC (ORCPT + 1 other); Fri, 2 Nov 2018 20:55:02 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:47868 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727277AbeKCAzC (ORCPT ); Fri, 2 Nov 2018 20:55:02 -0400 Received: from localhost.localdomain (cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 9A4841A4A; Fri, 2 Nov 2018 16:47:28 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1541173649; bh=rV4SVkdaL6T+xEGcgSu7LeAhG2Hr8c9gUy/8Loshhjg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dZ0fWXrxeiuVPuvT+qNNSVDFzkxgtQoGa+lHZ8Pp2sXt5iPEDgSGIo/a9MJ9e1dRh PmKpo4Bd/KBwNTBMRS38CumMfckIRQ5avLF3IsxzT7C+VALHnonJX/xUvy0tV5IOSQ sV7yG+jxEPnAh25WkZRq1UyqkGQYHOaBuoH67Nts= From: Kieran Bingham To: linux-renesas-soc@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, sakari.ailus@iki.fi Cc: =?UTF-8?q?Niklas=20S=C3=B6derlund?= , Jacopo Mondi , Laurent Pinchart , Kieran Bingham , linux-kernel@vger.kernel.org, Laurent Pinchart , Jacopo Mondi Subject: [PATCH v4 1/4] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286 Date: Fri, 2 Nov 2018 15:47:20 +0000 Message-Id: <20181102154723.23662-2-kieran.bingham@ideasonboard.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181102154723.23662-1-kieran.bingham@ideasonboard.com> References: <20181102154723.23662-1-kieran.bingham@ideasonboard.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Laurent Pinchart The MAX9286 deserializes video data received on up to 4 Gigabit Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up to 4 data lanes. Signed-off-by: Laurent Pinchart Signed-off-by: Jacopo Mondi Signed-off-by: Kieran Bingham --- v3: - Update binding descriptions v4: - Define the use of a CSI2 D-PHY - Rename pwdn-gpios to enable-gpios (with inverted polarity) - Remove clock-lanes mapping support - rewrap text blocks - Fix typos --- .../bindings/media/i2c/maxim,max9286.txt | 182 ++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt new file mode 100644 index 000000000000..672f6a4d417d --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt @@ -0,0 +1,182 @@ +Maxim Integrated Quad GMSL Deserializer +--------------------------------------- + +The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia +Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data +lanes. + +In addition to video data, the GMSL links carry a bidirectional control channel +that encapsulates I2C messages. The MAX9286 forwards all I2C traffic not +addressed to itself to the other side of the links, where a GMSL serializer +will output it on a local I2C bus. In the other direction all I2C traffic +received over GMSL by the MAX9286 is output on the local I2C bus. + +Required Properties: + +- compatible: Shall be "maxim,max9286" +- reg: I2C device address + +Optional Properties: + +- poc-supply: Regulator providing Power over Coax to the cameras +- enable-gpios: GPIO connected to the #PWDN pin with inverted polarity + +Required endpoint nodes: +----------------------- + +The connections to the MAX9286 GMSL and its endpoint nodes are modeled using +the OF graph bindings in accordance with the video interface bindings defined +in Documentation/devicetree/bindings/media/video-interfaces.txt. + +The following table lists the port number corresponding to each device port. + + Port Description + ---------------------------------------- + Port 0 GMSL Input 0 + Port 1 GMSL Input 1 + Port 2 GMSL Input 2 + Port 3 GMSL Input 3 + Port 4 CSI-2 Output + +Optional Endpoint Properties for GMSL Input Ports (Port [0-3]): + +- remote-endpoint: phandle to the remote GMSL source endpoint subnode in the + remote node port. + +Required Endpoint Properties for CSI-2 Output Port (Port 4): + +- remote-endpoint: phandle to the remote CSI-2 sink endpoint node. +- data-lanes: array of physical CSI-2 data lane indexes. + +Required i2c-mux nodes: +---------------------- + +Each GMSL link is modeled as a child bus of an i2c bus multiplexer/switch, in +accordance with bindings described in +Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer device on the +remote end of the GMSL link shall be modelled as a child node of the +corresponding I2C bus. + +Required i2c child bus properties: +- all properties described as required i2c child bus nodes properties in + Documentation/devicetree/bindings/i2c/i2c-mux.txt. + +Example: +------- + + gmsl-deserializer@2c { + compatible = "maxim,max9286"; + reg = <0x2c>; + poc-supply = <&camera_poc_12v>; + enable-gpios = <&gpio 13 GPIO_ACTIVE_LOW>; + + #address-cells = <1>; + #size-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + max9286_in0: endpoint { + remote-endpoint = <&rdacm20_out0>; + }; + }; + + port@1 { + reg = <1>; + max9286_in1: endpoint { + remote-endpoint = <&rdacm20_out1>; + }; + }; + + port@2 { + reg = <2>; + max9286_in2: endpoint { + remote-endpoint = <&rdacm20_out2>; + }; + }; + + port@3 { + reg = <3>; + max9286_in3: endpoint { + remote-endpoint = <&rdacm20_out3>; + }; + }; + + port@4 { + reg = <4>; + max9286_out: endpoint { + data-lanes = <1 2 3 4>; + remote-endpoint = <&csi40_in>; + }; + }; + }; + + i2c@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + camera@51 { + compatible = "imi,rdacm20"; + reg = <0x51 0x61>; + + port { + rdacm20_out0: endpoint { + remote-endpoint = <&max9286_in0>; + }; + }; + + }; + }; + + i2c@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + + camera@52 { + compatible = "imi,rdacm20"; + reg = <0x52 0x62>; + port { + rdacm20_out1: endpoint { + remote-endpoint = <&max9286_in1>; + }; + }; + }; + }; + + i2c@2 { + #address-cells = <1>; + #size-cells = <0>; + reg = <2>; + + camera@53 { + compatible = "imi,rdacm20"; + reg = <0x53 0x63>; + port { + rdacm20_out2: endpoint { + remote-endpoint = <&max9286_in2>; + }; + }; + }; + }; + + i2c@3 { + #address-cells = <1>; + #size-cells = <0>; + reg = <3>; + + camera@54 { + compatible = "imi,rdacm20"; + reg = <0x54 0x64>; + port { + rdacm20_out3: endpoint { + remote-endpoint = <&max9286_in3>; + }; + }; + }; + }; + };