From patchwork Mon Nov 2 16:52:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 11874551 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 BF23A92C for ; Mon, 2 Nov 2020 16:53:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B041C222BA for ; Mon, 2 Nov 2020 16:53:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727552AbgKBQx0 (ORCPT ); Mon, 2 Nov 2020 11:53:26 -0500 Received: from relay12.mail.gandi.net ([217.70.178.232]:46489 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727543AbgKBQxZ (ORCPT ); Mon, 2 Nov 2020 11:53:25 -0500 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay12.mail.gandi.net (Postfix) with ESMTPSA id 9671D200005; Mon, 2 Nov 2020 16:53:21 +0000 (UTC) From: Jacopo Mondi To: linux-media@vger.kernel.org Cc: Jacopo Mondi , naush@raspberrypi.com, dave.stevenson@raspberrypi.com, laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com, niklas.soderlund@ragnatech.se, hverkuil@xs4all.nl, sakari.ailus@iki.fi, nsaenzjulienne@suse.de, mchehab+huawei@kernel.org Subject: [PATCH v3 3/5] dt-bindings: media: Document BCM283x CSI2/CCP2 receiver Date: Mon, 2 Nov 2020 17:52:56 +0100 Message-Id: <20201102165258.408049-4-jacopo@jmondi.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201102165258.408049-1-jacopo@jmondi.org> References: <20201102165258.408049-1-jacopo@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dave Stevenson Document the DT bindings for the CSI2/CCP2 receiver peripheral (known as Unicam) on BCM283x SoCs. Signed-off-by: Dave Stevenson Signed-off-by: Laurent Pinchart Signed-off-by: Jacopo Mondi --- .../bindings/media/brcm,bcm2835-unicam.yaml | 155 ++++++++++++++++++ 1 file changed, 155 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 0000000000000..6ffc900e8ae8f --- /dev/null +++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml @@ -0,0 +1,155 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2020 Raspberry Pi (Trading) Ltd. +%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 + - Raspberry Pi kernel list + +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: Main registers block + - description: Clock registers block + + interrupts: + maxItems: 1 + + clocks: + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + items: + - const: lp + - const: core + + power-domains: + maxItems: 1 + + brcm,num-data-lanes: + description: + The number of data lanes supported by this Unicam instance. It may be + larger than the number of data lanes routed on the board, as described by + the data-lanes property of the endpoint. + allOf: + - $ref: "/schemas/types.yaml#/definitions/uint32" + - enum: [1, 2, 4] + + port: + type: object + description: + Input port node, as described in video-interfaces.txt. + + properties: + endpoint: + type: object + + properties: + clock-lanes: + items: + - const: 0 + + data-lanes: + description: + Lane reordering is not supported, items shall be in order, + starting at 1. + allOf: + - $ref: "/schemas/types.yaml#/definitions/uint32-array" + - maxItems: 1 + items: + minItems: 1 + maxItems: 4 + items: + - const: 1 + - const: 2 + - const: 3 + - const: 4 + + lane-polarities: + description: + Lane inversion is not supported. If the property is specified, it + shall contain all 0's. + allOf: + - $ref: "/schemas/types.yaml#/definitions/uint32-array" + - maxItems: 1 + items: + minItems: 2 + maxItems: 5 + items: + - const: 0 + - const: 0 + - const: 0 + - const: 0 + - const: 0 + + remote-endpoint: true + + required: + - data-lanes + - remote-endpoint + + additionalProperties: false + + required: + - endpoint + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - power-domains + - brcm,num-data-lanes + - port + +additionalProperties: false + +examples: + - | + #include + #include + #include + + csi@7e801000 { + compatible = "brcm,bcm2835-unicam"; + reg = <0x7e801000 0x800>, + <0x7e802004 0x4>; + interrupts = <2 7>; + clocks = <&clocks BCM2835_CLOCK_CAM1>; + clock-names = "lp"; + power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>; + brcm,num-data-lanes = <4>; + + port { + csi1_ep: endpoint { + remote-endpoint = <&imx219_0>; + data-lanes = <1 2>; + }; + }; + }; +...