From patchwork Mon Apr 23 21:08:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Rosin X-Patchwork-Id: 903171 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=axentia.se Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=axentia.se header.i=@axentia.se header.b="prhbp6Zs"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40VJxT3dzNz9s02 for ; Tue, 24 Apr 2018 07:09:33 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932429AbeDWVIq (ORCPT ); Mon, 23 Apr 2018 17:08:46 -0400 Received: from mail-he1eur01on0116.outbound.protection.outlook.com ([104.47.0.116]:56392 "EHLO EUR01-HE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932157AbeDWVIm (ORCPT ); Mon, 23 Apr 2018 17:08:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axentia.se; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=Vkw2BlqmPx1FeGECzbNmjIvce4GmEsXm3cUTrSlqnfk=; b=prhbp6ZsN6dWcuNYhQGPOVGGG2CRm/JGLDSqDt9EJUgd/dOtalikua6XlVDrODAOtIALpVRAfoH32W+2SA4QfZ6qUoogPzs6388A23aYp/3eMethYEiArrZWRbUsna0+qXQ+3novjCh9p6MHQFEavvytcthdmfObA1NbSmTAzkU= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=peda@axentia.se; Received: from orc.pedanet (85.226.244.23) by HE1PR0202MB2779.eurprd02.prod.outlook.com (2603:10a6:3:e8::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.696.13; Mon, 23 Apr 2018 21:08:37 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Cc: Peter Rosin , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Rob Herring , Mark Rutland , "David S. Miller" , Greg Kroah-Hartman , Mauro Carvalho Chehab , Linus Walleij , Andrew Morton , Randy Dunlap , "Andrew F . Davis" , Fabio Estevam , linux-iio@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v4 3/4] dt-bindings: iio: afe: add binding for current-sense-amplifier Date: Mon, 23 Apr 2018 23:08:08 +0200 Message-Id: <20180423210809.29586-4-peda@axentia.se> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180423210809.29586-1-peda@axentia.se> References: <20180423210809.29586-1-peda@axentia.se> MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: CWLP265CA0150.GBRP265.PROD.OUTLOOK.COM (2603:10a6:401:52::18) To HE1PR0202MB2779.eurprd02.prod.outlook.com (2603:10a6:3:e8::21) X-MS-PublicTrafficType: Email X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(7021125)(5600026)(4534165)(7022125)(4603075)(4627221)(201702281549075)(7048125)(7024125)(7027125)(7028125)(7023125)(2017052603328)(7153060)(7193020); SRVR:HE1PR0202MB2779; X-Microsoft-Exchange-Diagnostics: 1; HE1PR0202MB2779; 3:w31AGTsX4inoPpOh1dJwxIGz+4gkXcS5apE3n7y4WXRV6np/5Gfn+YrxyHX8lw+q1SQFcDe8nrj0VoCjr+pkOJUtBLC6h/mlfa0if+lyKHhgjXrvaeI4jrFNgu3E+b6fVyemfK6Haug0aEbW1Hu1huBXrs20e6FHuottQVcNinP5HSk6B4473Mu4C4Ud87BTRoVtn+/sUFnVJ1DHPEp9MrckKVH60Zalu8jG6cYPyTrUnsarY/E7ZNggMslAYepF; 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Signed-off-by: Peter Rosin Reviewed-by: Rob Herring --- .../bindings/iio/afe/current-sense-amplifier.txt | 26 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt diff --git a/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt b/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt new file mode 100644 index 000000000000..0ddbaebba8ce --- /dev/null +++ b/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt @@ -0,0 +1,26 @@ +Current Sense Amplifier +======================= + +When an io-channel measures the output voltage from a current sense +amplifier, the interesting mesaurement is almost always the current +through the sense resistor, not the voltage output. This binding +describes such a current sense circuit. + +Required properties: +- compatible : "current-sense-amplifier" +- io-channels : Channel node of a voltage io-channel. +- sense-resistor-micro-ohms : The sense resistance in microohms. + +Optional properties: +- sense-gain-mult: Amplifier gain multiplier. The default is <1>. +- sense-gain-div: Amplifier gain divider. The default is <1>. + +Example: + +sysi { + compatible = "current-sense-amplifier"; + io-channels = <&tiadc 0>; + + sense-resistor-micro-ohms = <20000>; + sense-gain-mul = <50>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index 4d534c9321de..1b23e9ebff9c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6893,6 +6893,7 @@ IIO UNIT CONVERTER M: Peter Rosin L: linux-iio@vger.kernel.org S: Maintained +F: Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt F: Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt F: Documentation/devicetree/bindings/iio/afe/voltage-divider.txt