From patchwork Thu Mar 30 15:27:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugues FRUCHET X-Patchwork-Id: 9654633 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 438DD602BD for ; Thu, 30 Mar 2017 15:36:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 33EB628562 for ; Thu, 30 Mar 2017 15:36:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2770928567; Thu, 30 Mar 2017 15:36:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9220128562 for ; Thu, 30 Mar 2017 15:36:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LmaNAanmJL9hKmcFKAOcrqJSnpmCqj5qBafG+IhXHiA=; b=dn23m7QfIJUpnT lWunhpg74tsxG8iaTQye39i0Vd2QpmD2C/Cirq9M4jnCrUr2/dOWUyzkH/4BlnVcR/uDyv5rpBzze hmwJnCBjWbzFC76qzUJdVyRY8NGq07VpdHkRoeKRCAhI1Q9l8eoDhlq45B8EmKQuGIbMboQ5BmdOL VObAfZksEjj/Pj0KbL2ypSNju1n5aSwmqC3FIEVBCeTaNcPayEUG6FqZe1Xb/UIpiKScXV/ZOXFtO FSId90UjUwU9DQImSsH72N8b2ntJIli0Upj9UCV3Mv9mU5cmuF8F6rxT/zP8lslQzHJmogBHC5O7S NNQjBbVOEngI+HhtDFbw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1ctc7j-0000Vi-Ev; Thu, 30 Mar 2017 15:36:31 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1ctc08-0001LN-Qa for linux-arm-kernel@lists.infradead.org; Thu, 30 Mar 2017 15:28:44 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id v2UFQDcw024344; Thu, 30 Mar 2017 17:28:11 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 29ggrve9q2-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 30 Mar 2017 17:28:11 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 5832434; Thu, 30 Mar 2017 15:28:10 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas23.st.com [10.75.90.46]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 31D00296B; Thu, 30 Mar 2017 15:28:10 +0000 (GMT) Received: from localhost (10.201.23.73) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 30 Mar 2017 17:28:09 +0200 From: Hugues Fruchet To: Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue , Mauro Carvalho Chehab , Hans Verkuil Subject: [PATCH v2 1/8] dt-bindings: Document STM32 DCMI bindings Date: Thu, 30 Mar 2017 17:27:40 +0200 Message-ID: <1490887667-8880-2-git-send-email-hugues.fruchet@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1490887667-8880-1-git-send-email-hugues.fruchet@st.com> References: <1490887667-8880-1-git-send-email-hugues.fruchet@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.73] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-03-30_12:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170330_082841_244326_779F9911 X-CRM114-Status: GOOD ( 12.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yannick Fertre , Benjamin Gaignard , Hugues Fruchet , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds documentation of device tree bindings for the STM32 DCMI (Digital Camera Memory Interface). Signed-off-by: Hugues Fruchet --- .../devicetree/bindings/media/st,stm32-dcmi.txt | 85 ++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/st,stm32-dcmi.txt diff --git a/Documentation/devicetree/bindings/media/st,stm32-dcmi.txt b/Documentation/devicetree/bindings/media/st,stm32-dcmi.txt new file mode 100644 index 0000000..8180f63 --- /dev/null +++ b/Documentation/devicetree/bindings/media/st,stm32-dcmi.txt @@ -0,0 +1,85 @@ +STMicroelectronics STM32 Digital Camera Memory Interface (DCMI) + +Required properties: +- compatible: "st,stm32-dcmi" +- reg: physical base address and length of the registers set for the device +- interrupts: should contain IRQ line for the DCMI +- clocks: list of clock specifiers, corresponding to entries in + the clock-names property +- clock-names: must contain "mclk", which is the DCMI peripherial clock +- resets: reference to a reset controller +- reset-names: see Documentation/devicetree/bindings/reset/st,stm32-rcc.txt + +DCMI supports a single port node with parallel bus. It should contain one +'port' child node with child 'endpoint' node. Please refer to the bindings +defined in Documentation/devicetree/bindings/media/video-interfaces.txt. + +Example: + +Device node example +------------------- + dcmi: dcmi@50050000 { + compatible = "st,stm32-dcmi"; + reg = <0x50050000 0x400>; + interrupts = <78>; + resets = <&rcc STM32F4_AHB2_RESET(DCMI)>; + clocks = <&rcc 0 STM32F4_AHB2_CLOCK(DCMI)>; + clock-names = "mclk"; + pinctrl-names = "default"; + pinctrl-0 = <&dcmi_pins>; + dmas = <&dma2 1 1 0x414 0x3>; + dma-names = "tx"; + status = "disabled"; + }; + +Board setup example +------------------- +This example is extracted from STM32F429-EVAL board devicetree. +Please note that on this board, the camera sensor reset & power-down +line level are inverted (so reset is active high and power-down is +active low). + +/ { + [...] + clocks { + clk_ext_camera: clk-ext-camera { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <24000000>; + }; + }; + [...] +}; + +&dcmi { + status = "okay"; + + port { + dcmi_0: endpoint@0 { + remote-endpoint = <&ov2640_0>; + bus-width = <8>; + hsync-active = <0>; + vsync-active = <0>; + pclk-sample = <1>; + }; + }; +}; + +&i2c@1 { + [...] + ov2640: camera@30 { + compatible = "ovti,ov2640"; + reg = <0x30>; + resetb-gpios = <&stmpegpio 2 GPIO_ACTIVE_HIGH>; + pwdn-gpios = <&stmpegpio 0 GPIO_ACTIVE_LOW>; + clocks = <&clk_ext_camera>; + clock-names = "xvclk"; + status = "okay"; + + port { + ov2640_0: endpoint { + remote-endpoint = <&dcmi_0>; + }; + }; + }; +};