From patchwork Tue Feb 7 19:22:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 9560937 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 0413C602B1 for ; Tue, 7 Feb 2017 19:24:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EA14728481 for ; Tue, 7 Feb 2017 19:24:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DE48928486; Tue, 7 Feb 2017 19:24:39 +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=-1.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, T_DKIM_INVALID autolearn=no 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 8B8AD28481 for ; Tue, 7 Feb 2017 19:24:39 +0000 (UTC) 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 1cbBNU-0007HR-Cb; Tue, 07 Feb 2017 19:24:36 +0000 Received: from vern.gendns.com ([206.190.152.46]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cbBN1-0006Ld-LR for linux-arm-kernel@lists.infradead.org; Tue, 07 Feb 2017 19:24:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=References:In-Reply-To:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=NqSdicaDk3Z7L4aDNgVpz65NgvRKah3FFAXmcmDD31Q=; b=H0xkttIktAKmti5qKoY+wVfng e31qPAGAMabxJGLItOm9OXbf1DqcDZLcWBk5eo9yzSmLoL7CTAxEQ0HQfW5k2nWZkSc7tmhnE3eLJ lvizxj3n4mhOXgAjlDD+vjs/yTockSKZQqdX02A/7/iHFOInskHWJQOmayIh09HATbc0e/3BHR2b/ WOZ/N1rqE97aCAcChaHcCqjs9v9psytxE0CLZG91sO0Zf/YQJgH7x+AmBsFbASsTClreSLVqyItoy 0hSEauQVVhkwIkPkbSWD/kv3as9A/Efiut9KStYcjQEtP7/3dEgh+5tpe/3Axfy/knpQu/Wtr3IvF b14aqU3TQ==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:53664 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-SHA256:128) (Exim 4.87) (envelope-from ) id 1cbBLd-002LOx-2e; Tue, 07 Feb 2017 14:22:41 -0500 From: David Lechner To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH 1/3] ARM: da850-lego-ev3: Add device tree node for A/DC Date: Tue, 7 Feb 2017 13:22:07 -0600 Message-Id: <1486495329-2789-2-git-send-email-david@lechnology.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1486495329-2789-1-git-send-email-david@lechnology.com> References: <1486495329-2789-1-git-send-email-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170207_112407_855703_9E3ADC84 X-CRM114-Status: UNSURE ( 7.46 ) X-CRM114-Notice: Please train this message. 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: Mark Rutland , David Lechner , Kevin Hilman , Sekhar Nori , linux-kernel@vger.kernel.org, Rob Herring MIME-Version: 1.0 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 a node for the TI ADS7957 analog/digital converter on LEGO MINDSTORMS EV3 as well as a regulator node that is used by the A/DC node. Signed-off-by: David Lechner --- arch/arm/boot/dts/da850-lego-ev3.dts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts index 112ec92..0309537 100644 --- a/arch/arm/boot/dts/da850-lego-ev3.dts +++ b/arch/arm/boot/dts/da850-lego-ev3.dts @@ -139,6 +139,19 @@ enable-active-high; regulator-boot-on; }; + + /* + * This is a simple voltage divider on VCC5V to provide a 2.5V + * reference signal to the ADC. + */ + adc_ref: regulator2 { + compatible = "regulator-fixed"; + regulator-name = "adc ref"; + regulator-min-microvolt = <2500000>; + regulator-max-microvolt = <2500000>; + regulator-boot-on; + vin-supply = <&vcc5v>; + }; }; &pmx_core { @@ -293,6 +306,14 @@ }; }; }; + + adc: adc@3 { + compatible = "ti,ads7957"; + reg = <3>; + #io-channel-cells = <1>; + spi-max-frequency = <10000000>; + vref-supply = <&adc_ref>; + }; }; &gpio {