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=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 59352C07E85 for ; Tue, 11 Dec 2018 05:02:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 052092084A for ; Tue, 11 Dec 2018 05:02:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 052092084A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=electromag.com.au Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-iio-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726585AbeLKFCE (ORCPT ); Tue, 11 Dec 2018 00:02:04 -0500 Received: from anchovy2.45ru.net.au ([203.30.46.146]:54499 "EHLO anchovy2.45ru.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728007AbeLKFCE (ORCPT ); Tue, 11 Dec 2018 00:02:04 -0500 Received: (qmail 15972 invoked by uid 5089); 11 Dec 2018 05:02:02 -0000 Received: by simscan 1.2.0 ppid: 15844, pid: 15845, t: 0.0583s scanners: regex: 1.2.0 attach: 1.2.0 clamav: 0.88.3/m:40/d:1950 Received: from unknown (HELO ?192.168.0.122?) (preid@electromag.com.au@203.59.235.95) by anchovy3.45ru.net.au with ESMTPA; 11 Dec 2018 05:02:01 -0000 Subject: Re: [PATCH V4 2/2] iio: light: isl29018: add optional vdd/vdda regulator operation support To: Anson Huang , "jic23@kernel.org" , "knaack.h@gmx.de" , "lars@metafoo.de" , "pmeerw@pmeerw.net" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "linux-iio@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "festevam@gmail.com" Cc: dl-linux-imx References: <1544498291-2716-1-git-send-email-Anson.Huang@nxp.com> <1544498291-2716-2-git-send-email-Anson.Huang@nxp.com> <0b08c0d1-afe2-5ade-9333-2eb7d57d4db6@electromag.com.au> From: Phil Reid Message-ID: <312e5c0c-e92f-a337-3730-2fd73c99f48a@electromag.com.au> Date: Tue, 11 Dec 2018 13:02:00 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-AU Content-Transfer-Encoding: 8bit Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org On 11/12/2018 12:29 pm, Anson Huang wrote: >> G'day Anson, >> >> Just pulled up the datasheet for this chip. >> >> The absolute max for Vdda is speced as Vddd ±0.5 With a note that Vdda >> should be externally shorted to Vddd. > The data sheet says vdda should be connected to vdd externally, then I think we should just > use one regulator vdd, then it will be much easier for the driver, what do you think? > Yes I think that makes sense. -- Regards Phil