From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 8EED6C04AA9 for ; Thu, 2 May 2019 16:14:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6134020675 for ; Thu, 2 May 2019 16:14:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726521AbfEBQOo (ORCPT ); Thu, 2 May 2019 12:14:44 -0400 Received: from da1vs03.rockwellcollins.com ([205.175.227.47]:44885 "EHLO da1vs03.rockwellcollins.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726509AbfEBQOo (ORCPT ); Thu, 2 May 2019 12:14:44 -0400 Received: from ofwda1n02.rockwellcollins.com (HELO ciulimr02.rockwellcollins.com) ([205.175.227.14]) by da1vs03.rockwellcollins.com with ESMTP; 02 May 2019 11:14:43 -0500 X-Received: from righttwix.rockwellcollins.com (righttwix.rockwellcollins.com [192.168.141.218]) by ciulimr02.rockwellcollins.com (Postfix) with ESMTP id D0EE220080; Thu, 2 May 2019 11:14:42 -0500 (CDT) From: Adam Michaelis To: linux-iio@vger.kernel.org Cc: lars@metafoo.de, michael.hennerich@analog.com, jic23@kernel.org, knaack.h@gmx.de, pmeerw@pmeerw.net, robh+dt@kernel.org, mark.rutland@arm.com, charles-antoine.couret@essensium.com, devicetree@vger.kernel.org, brandon.maier@rockwellcollins.com, clayton.shotwell@rockwellcollins.com, Adam Michaelis Subject: [PATCH v2 2/6] dt-bindings: iio: ad7949: Add adi,reference-select Date: Thu, 2 May 2019 11:14:28 -0500 Message-Id: <1556813672-49861-2-git-send-email-adam.michaelis@rockwellcollins.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1556813672-49861-1-git-send-email-adam.michaelis@rockwellcollins.com> References: <1556813672-49861-1-git-send-email-adam.michaelis@rockwellcollins.com> Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Adding optional parameter to AD7949 to specify the source for the reference voltage signal. Default value is maintaned with option '6' to match previous version of driver. Signed-off-by: Adam Michaelis --- V2: Add some defines to reduce use of magic numbers. --- .../devicetree/bindings/iio/adc/ad7949.txt | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt index c7f5057356b1..14ee9a2cb2a5 100644 --- a/Documentation/devicetree/bindings/iio/adc/ad7949.txt +++ b/Documentation/devicetree/bindings/iio/adc/ad7949.txt @@ -6,11 +6,29 @@ Required properties: * "adi,ad7682" * "adi,ad7689" - reg: spi chip select number for the device - - vref-supply: The regulator supply for ADC reference voltage -Example: +Optional properties: + - adi,reference-select: Select the reference voltage source to use + when converting the input voltages. Valid values are: + 0: Internal 2.5V reference; temperature sensor enabled + 1: Internal 4.096V reference; temperature sensor enabled + 2: External reference, temperature sensor enabled, no buffer + 3: External reference, temperature sensor enabled, buffer enabled + 6: External reference, temperature sensor disabled, no buffer + 7: External reference, temperature sensor disabled, buffer enabled + - vref-supply: The regulator supply for ADC reference voltage. Required + if external reference selected by 'adi,reference-select'. + +Examples: adc@0 { compatible = "adi,ad7949"; reg = <0>; + adi,reference-select = <2>; vref-supply = <&vdd_supply>; }; + +adc@0 { + compatible = "adi,ad7949"; + reg = <0>; + adi,reference-select = <0>; +}; -- 1.9.1