From patchwork Wed Feb 2 17:56:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jean-Michel Hautbois X-Patchwork-Id: 12733331 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D19DC433F5 for ; Wed, 2 Feb 2022 17:57:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346423AbiBBR5P (ORCPT ); Wed, 2 Feb 2022 12:57:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346419AbiBBR5N (ORCPT ); Wed, 2 Feb 2022 12:57:13 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC46BC06173D; Wed, 2 Feb 2022 09:57:12 -0800 (PST) Received: from tatooine.ideasonboard.com (unknown [IPv6:2a01:e0a:169:7140:7139:eada:2ff6:73dd]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id E31A3E04; Wed, 2 Feb 2022 18:56:49 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1643824610; bh=1oG8FpUhanwzJ6Xba8rv47glsXs3JVRy9iJcIqk3Grs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j7UYdY2dRIPVhpWwWnv2DUXzxM62S3z5MZkBDfcHPcR/Ha9pjiIXxiVVv+FyLXJJA GCiQeQh81GAnPm/gmM2XOR2g5efCxjAjhuYmBHyBUefUxbMmW+cicYfg30VvN3fdzq hDF9rfUZ/FM1PX/c/Lb/l4Kj1jGuURyNNwcZTJFY= From: Jean-Michel Hautbois To: jeanmichel.hautbois@ideasonboard.com Cc: dave.stevenson@raspberrypi.com, devicetree@vger.kernel.org, kernel-list@raspberrypi.com, laurent.pinchart@ideasonboard.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, lukasz@jany.st, mchehab@kernel.org, naush@raspberrypi.com, robh@kernel.org, tomi.valkeinen@ideasonboard.com Subject: [RFC PATCH v3 03/11] media: dt-bindings: media: Add bindings for bcm2835-unicam Date: Wed, 2 Feb 2022 18:56:31 +0100 Message-Id: <20220202175639.149681-4-jeanmichel.hautbois@ideasonboard.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220202175639.149681-1-jeanmichel.hautbois@ideasonboard.com> References: <20220202175639.149681-1-jeanmichel.hautbois@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Introduce the dt-bindings documentation for bcm2835 CCP2/CSI2 Unicam camera interface. Also add a MAINTAINERS entry for it. Signed-off-by: Dave Stevenson Signed-off-by: Naushir Patuck Signed-off-by: Jean-Michel Hautbois --- Dave: I assumed you were the maintainer for this file, as I based it on the bcm2835-unicam.txt file. Are you happy to be added directly as the maintainer, or should this be specified as "Raspberry Pi Kernel Maintenance " --- .../bindings/media/brcm,bcm2835-unicam.yaml | 107 ++++++++++++++++++ MAINTAINERS | 7 ++ 2 files changed, 114 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml diff --git a/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml new file mode 100644 index 000000000000..5bf41a8834fa --- /dev/null +++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml @@ -0,0 +1,107 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/brcm,bcm2835-unicam.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom BCM283x Camera Interface (Unicam) + +maintainers: + - Dave Stevenson + +description: |- + The Unicam block on BCM283x SoCs is the receiver for either + CSI-2 or CCP2 data from image sensors or similar devices. + + The main platform using this SoC is the Raspberry Pi family of boards. + On the Pi the VideoCore firmware can also control this hardware block, + and driving it from two different processors will cause issues. + To avoid this, the firmware checks the device tree configuration + during boot. If it finds device tree nodes starting by csi then + it will stop the firmware accessing the block, and it can then + safely be used via the device tree binding. + +properties: + compatible: + const: brcm,bcm2835-unicam + + reg: + maxItems: 2 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Clock for the camera. + - description: Clock for the vpu. + + clock-names: + items: + - const: lp + - const: vpu + + power-domains: + items: + - description: Unicam power domain + + num-data-lanes: + items: + - enum: [ 2, 4 ] + + port: + additionalProperties: false + $ref: /schemas/graph.yaml#/$defs/port-base + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: true + link-frequencies: true + + required: + - data-lanes + - link-frequencies + + required: + - endpoint + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - power-domains + - num-data-lanes + - port + +additionalProperties: False + +examples: + - | + #include + #include + #include + csi1: csi@7e801000 { + compatible = "brcm,bcm2835-unicam"; + reg = <0x7e801000 0x800>, + <0x7e802004 0x4>; + interrupts = ; + clocks = <&clocks BCM2835_CLOCK_CAM1>, + <&firmware_clocks 4>; + clock-names = "lp", "vpu"; + power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>; + num-data-lanes = <2>; + port { + csi1_ep: endpoint { + remote-endpoint = <&imx219_0>; + data-lanes = <1 2>; + link-frequencies = /bits/ 64 <456000000>; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index a0770a861ca4..29344ea86847 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3670,6 +3670,13 @@ N: bcm113* N: bcm216* N: kona +BROADCOM BCM2835 CAMERA DRIVER +M: Raspberry Pi Kernel Maintenance +L: linux-media@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml +F: arch/arm/boot/dts/bcm283x* + BROADCOM BCM47XX MIPS ARCHITECTURE M: Hauke Mehrtens M: Rafał Miłecki