From patchwork Wed Apr 14 13:51:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 12202939 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD184C433B4 for ; Wed, 14 Apr 2021 13:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B467B611C9 for ; Wed, 14 Apr 2021 13:51:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351666AbhDNNv2 (ORCPT ); Wed, 14 Apr 2021 09:51:28 -0400 Received: from relay3-d.mail.gandi.net ([217.70.183.195]:35867 "EHLO relay3-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349137AbhDNNvX (ORCPT ); Wed, 14 Apr 2021 09:51:23 -0400 X-Originating-IP: 93.61.96.190 Received: from uno.LocalDomain (93-61-96-190.ip145.fastwebnet.it [93.61.96.190]) (Authenticated sender: jacopo@jmondi.org) by relay3-d.mail.gandi.net (Postfix) with ESMTPSA id 0281B6000C; Wed, 14 Apr 2021 13:50:58 +0000 (UTC) From: Jacopo Mondi To: Geert Uytterhoeven , Magnus Damm , Laurent Pinchart , Kieran Bingham , Rob Herring Cc: Jacopo Mondi , linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/5] dt-bindings: media: max9286: Define 'maxim,gpio-poc' Date: Wed, 14 Apr 2021 15:51:24 +0200 Message-Id: <20210414135128.180980-2-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210414135128.180980-1-jacopo+renesas@jmondi.org> References: <20210414135128.180980-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Define a new vendor property in the maxim,max9286 binding schema. The new property allows to declare that the remote camera power-over-coax is controlled by one of the MAX9286 gpio lines. As it is currently not possible to establish a regulator as consumer of the MAX9286 gpio controller for this purpose, the property allows to declare that the camera power is controlled by the MAX9286 directly. The property accepts a gpio-index (0 or 1) and one line polarity flag as defined by dt-bindings/gpio/gpio.h. Signed-off-by: Jacopo Mondi Reviewed-by: Laurent Pinchart --- .../bindings/media/i2c/maxim,max9286.yaml | 53 ++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml index ee16102fdfe7..480a491f3744 100644 --- a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml @@ -70,6 +70,24 @@ properties: a remote serializer whose high-threshold noise immunity is not enabled is 100000 micro volts + maxim,gpio-poc: + $ref: '/schemas/types.yaml#/definitions/uint32-array' + minItems: 2 + maxItems: 2 + description: | + Identifier of gpio line that controls Power over Coax to the cameras and + the associated polarity flag (GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW) + as defined in . + + When the remote cameras power is controlled by one of the MAX9286 gpio + lines, this property has to be used to specify which line among the two + available ones controls the remote camera power enablement. + + When this property is used it is not possible to register a gpio + controller as the gpio lines are controlled directly by the MAX9286 and + not available for consumers, nor the 'poc-supply' property should be + specified. + ports: $ref: /schemas/graph.yaml#/properties/ports @@ -182,7 +200,6 @@ required: - reg - ports - i2c-mux - - gpio-controller additionalProperties: false @@ -327,4 +344,38 @@ examples: }; }; }; + + /* + * Example of a deserializer that controls the camera Power over Coax + * through one of its gpio lines. + */ + gmsl-deserializer@6c { + compatible = "maxim,max9286"; + reg = <0x6c>; + enable-gpios = <&gpio 14 GPIO_ACTIVE_HIGH>; + + /* + * The remote camera power is controlled by MAX9286 GPIO line #0. + * No 'poc-supply' nor 'gpio-controller' are specified. + */ + maxim,gpio-poc = <0 GPIO_ACTIVE_LOW>; + + /* + * Do not describe connections as they're the same as in the previous + * example. + */ + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@4 { + reg = <4>; + }; + }; + + i2c-mux { + #address-cells = <1>; + #size-cells = <0>; + }; + }; };