From patchwork Fri Mar 1 21:32:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 777888 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D91645823A; Fri, 1 Mar 2024 21:32:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709328767; cv=none; b=R7Bfxcfp/xJkcQaGbrELhguMCG+MHEH12ISOKtHqyEfjvT1r1MW6KrTp0SRzGNBTk17xTHsMTGFYWTMYEIn97X5/jY6ps8xitwcayyRIQrI5EHWnodQ/nKIErXI2HQD6leTolTbLDX8ASFbkPL7fJks90CGXx2f85QN7KbKRpaE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709328767; c=relaxed/simple; bh=2FxqeZyE7D4B6zEUDcwO9U26gNGo5IcTBKyKn6/fPUc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=PAinGShCfyu97CL8vlXEJxre9gaAC8ZEjqbkdFPgnpiOpFxWNY59OtOeFEziLq47pXkmCcEemvLclhkunFRsAHVc1h7dDt/cjNrJ5b9NCIKYOYlAWwl/6wyfRIHJmcF7ZophyWTOHu01Ov9cUfNVPPdCt+JDaaN2pHNmGfi/nXE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=VErnyiiy; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="VErnyiiy" Received: from pendragon.ideasonboard.com (89-27-53-110.bb.dnainternet.fi [89.27.53.110]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 5DD0831B4; Fri, 1 Mar 2024 22:32:26 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1709328746; bh=2FxqeZyE7D4B6zEUDcwO9U26gNGo5IcTBKyKn6/fPUc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VErnyiiywWtsWS3txN3zjI/j76gmcJOpvBtYRAGzbZ01N33+zWB5yyn63bD5fiyua Y+ialhfMMK869Z1dN4SygBZcgjVvlE3cPdhB6CG0orxh+pjjoqw4x4v90eo9CfbANP +Tjb3FzhfGkQurqNzglClitoIE72tuFObar3MemE= From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: Dave Stevenson , David Plowman , Jean-Michel Hautbois , Hans Verkuil , Naushir Patuck , Sakari Ailus , kernel-list@raspberrypi.com, linux-rpi-kernel@lists.infradead.org, Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Conor Dooley , Krzysztof Kozlowski , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v6 08/15] dt-bindings: media: Add bindings for bcm2835-unicam Date: Fri, 1 Mar 2024 23:32:23 +0200 Message-ID: <20240301213231.10340-9-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240301213231.10340-1-laurent.pinchart@ideasonboard.com> References: <20240301213231.10340-1-laurent.pinchart@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Dave Stevenson Introduce the dt-bindings documentation for bcm2835 CCP2/CSI2 Unicam camera interface. Signed-off-by: Dave Stevenson Co-developed-by: Naushir Patuck Signed-off-by: Naushir Patuck Co-developed-by: Jean-Michel Hautbois Signed-off-by: Jean-Michel Hautbois Reviewed-by: Laurent Pinchart Reviewed-by: Rob Herring Signed-off-by: Laurent Pinchart --- Changes since v5: - Squash MAINTAINERS changes in Changes since v3: - Make MAINTAINERS its own patch - Describe the reg and clocks correctly - Use a vendor entry for the number of data lanes --- .../bindings/media/brcm,bcm2835-unicam.yaml | 117 ++++++++++++++++++ MAINTAINERS | 6 + 2 files changed, 123 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..1938ace23b3d --- /dev/null +++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml @@ -0,0 +1,117 @@ +# 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: + - Raspberry Pi Kernel Maintenance + +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 whose name starts with '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: + items: + - description: Unicam block. + - description: Clock Manager Image (CMI) block. + + reg-names: + items: + - const: unicam + - const: cmi + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Clock to drive the LP state machine of Unicam. + - description: Clock for the VPU (core clock). + + clock-names: + items: + - const: lp + - const: vpu + + power-domains: + items: + - description: Unicam power domain + + brcm,num-data-lanes: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [ 2, 4 ] + description: | + Number of CSI-2 data lanes supported by this Unicam instance. The number + of data lanes actively used is specified with the data-lanes endpoint + property. + + port: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: true + + required: + - data-lanes + + required: + - endpoint + +required: + - compatible + - reg + - reg-names + - interrupts + - clocks + - clock-names + - power-domains + - brcm,num-data-lanes + - port + +additionalProperties: False + +examples: + - | + #include + #include + #include + csi1: csi@7e801000 { + compatible = "brcm,bcm2835-unicam"; + reg = <0x7e801000 0x800>, + <0x7e802004 0x4>; + reg-names = "unicam", "cmi"; + interrupts = ; + clocks = <&clocks BCM2835_CLOCK_CAM1>, + <&firmware_clocks 4>; + clock-names = "lp", "vpu"; + power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>; + brcm,num-data-lanes = <2>; + port { + csi1_ep: endpoint { + remote-endpoint = <&imx219_0>; + data-lanes = <1 2>; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index fada59148cb5..e50a59654e6e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3997,6 +3997,12 @@ N: bcm113* N: bcm216* N: kona +BROADCOM BCM2835 CAMERA DRIVERS +M: Raspberry Pi Kernel Maintenance +L: linux-media@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml + BROADCOM BCM47XX MIPS ARCHITECTURE M: Hauke Mehrtens M: Rafał Miłecki