From patchwork Mon Dec 16 10:29:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 11293723 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 31354186D for ; Mon, 16 Dec 2019 10:29:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0FA242072D for ; Mon, 16 Dec 2019 10:29:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="GvRUyGoG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727467AbfLPK3g (ORCPT ); Mon, 16 Dec 2019 05:29:36 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:40692 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727070AbfLPK3g (ORCPT ); Mon, 16 Dec 2019 05:29:36 -0500 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 DAAC6B1A; Mon, 16 Dec 2019 11:29:33 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1576492174; bh=ZIaWTQb5foHsyW3EPce6shFs7PtfFoP2AqMchE4b1sA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=GvRUyGoG4qAmRJ7mDfKvF2LRBfUqR+3S79qW5VzWO7os3Tsj8xXWqhXGIjONLCJzh 8GgiTp8fHG1AEm4lvPn/CMpiNNJcKqAqcHd3k/xgWiZIiDEu08UIcOodHcEsEclQiH 7Vy9mjlZQPPrwt5x0dYeHOj9XyF7yEkzm/i/yIJA= From: Kieran Bingham To: Jacopo Mondi , linux-renesas-soc@vger.kernel.org Subject: [RFC PATCH v6 02/13] dt-bindings: media: i2c: Add bindings for IMI RDACM20 Date: Mon, 16 Dec 2019 10:29:19 +0000 Message-Id: <20191216102930.5867-3-kieran.bingham+renesas@ideasonboard.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191216102930.5867-1-kieran.bingham+renesas@ideasonboard.com> References: <20191211124459.20508-1-kieran.bingham+renesas@ideasonboard.com> <20191216102930.5867-1-kieran.bingham+renesas@ideasonboard.com> MIME-Version: 1.0 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Jacopo Mondi The IMI RDACM20 is a Gigabit Multimedia Serial Link (GMSL) camera capable of transmitting video and I2C control messages on a coax cable physical link for automotive applications. Document its device tree binding interface. Signed-off-by: Jacopo Mondi Signed-off-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- v2: - Provide imi vendor prefix - Fix minor spelling v3: - update binding descriptions v4: - No change v5: - Specify optional third reg address for the MCU --- .../bindings/media/i2c/imi,rdacm20.txt | 66 +++++++++++++++++++ .../devicetree/bindings/vendor-prefixes.yaml | 2 + 2 files changed, 68 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/imi,rdacm20.txt diff --git a/Documentation/devicetree/bindings/media/i2c/imi,rdacm20.txt b/Documentation/devicetree/bindings/media/i2c/imi,rdacm20.txt new file mode 100644 index 000000000000..4731aafed63f --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/imi,rdacm20.txt @@ -0,0 +1,66 @@ +IMI D&D RDACM20 Automotive Camera Platform +------------------------------------------ + +The IMI D&D RDACM20 is a GMSL-compatible camera designed for automotive +applications. It encloses a Maxim Integrated MAX9271 GMSL serializer, an +Omnivision OV10635 camera sensor and an embedded MCU, and connects to a remote +GMSL endpoint through a coaxial cable. + + IMI RDACM20 + --------------- -------------------------------- +| GMSL | <--- Video Stream | <- Video--------\ | +| |< ====== GMSL Link ======== >|MAX9271<- I2C bus-> <-->OV10635 | +| de-serializer | <--- I2C messages ---> | \<-->MCU | + --------------- -------------------------------- + +The RDACM20 transmits video data generated by the embedded camera sensor on the +GMSL serial channel to a remote GMSL de-serializer, as well as it receives and +transmits I2C messages encapsulated in the GMSL bidirectional control channel. + +All I2C traffic received on the GMSL link not directed to the serializer is +propagated on the local I2C bus to the embedded camera sensor and MCU. All +I2C traffic generated on the local I2C bus not directed to the serializer is +propagated to the remote de-serializer encapsulated in the GMSL control channel. + +The RDACM20 DT node should be a direct child of the GMSL Deserializer's I2C bus +corresponding to the GMSL link that the camera is attached to. + +Required Properties: + +- compatible: Shall be "imi,rdacm20". +- reg: I2C device addresses, the first to be assigned to the serializer + the second to be assigned to the camera sensor. An optional third address can + be provided to specify the MCU address if present. + +Connection to the remote GMSL endpoint are modelled using the OF graph bindings +in accordance with the video interface bindings defined in +Documentation/devicetree/bindings/media/video-interfaces.txt. + +The device node contains a single "port" child node with a single "endpoint" +sub-device. + +Required endpoint properties: + +- remote-endpoint: phandle to the remote GMSL endpoint sub-node in the remote + node port. + +Example: +------- + + i2c@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + camera@51 { + compatible = "imi,rdacm20"; + reg = <0x31 0x41 0x51>; + + port { + rdacm20_out0: endpoint { + remote-endpoint = <&max9286_in0>; + }; + }; + + }; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml index 6046f4555852..80042764d2c6 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -429,6 +429,8 @@ patternProperties: description: Ingenieurburo Fur Ic-Technologie (I/F/I) "^ilitek,.*": description: ILI Technology Corporation (ILITEK) + "^imi,.*": + description: Integrated Micro-Electronics Inc. "^img,.*": description: Imagination Technologies Ltd. "^incircuit,.*":