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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 C4BD4C47404 for ; Mon, 7 Oct 2019 13:27:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2FCD2173B for ; Mon, 7 Oct 2019 13:27:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727861AbfJGN12 (ORCPT ); Mon, 7 Oct 2019 09:27:28 -0400 Received: from relay5-d.mail.gandi.net ([217.70.183.197]:45017 "EHLO relay5-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728466AbfJGN1E (ORCPT ); Mon, 7 Oct 2019 09:27:04 -0400 X-Originating-IP: 86.250.200.211 Received: from localhost.localdomain (lfbn-1-17395-211.w86-250.abo.wanadoo.fr [86.250.200.211]) (Authenticated sender: miquel.raynal@bootlin.com) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 9272A1C0003; Mon, 7 Oct 2019 13:27:01 +0000 (UTC) From: Miquel Raynal To: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Rob Herring , Mark Rutland Cc: , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 3/8] iio: adc: max1027: Reset the device at probe time Date: Mon, 7 Oct 2019 15:26:52 +0200 Message-Id: <20191007132657.4190-4-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191007132657.4190-1-miquel.raynal@bootlin.com> References: <20191007132657.4190-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org All the registers are configured by the driver, let's reset the chip at probe time, avoiding any conflict with a possible earlier configuration. Signed-off-by: Miquel Raynal --- drivers/iio/adc/max1027.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 823223b77a70..f9b473ee6711 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -466,6 +466,14 @@ static int max1027_probe(struct spi_device *spi) } } + /* Internal reset */ + st->reg = MAX1027_RST_REG; + ret = spi_write(st->spi, &st->reg, 1); + if (ret < 0) { + dev_err(&indio_dev->dev, "Failed to reset the ADC\n"); + return ret; + } + /* Disable averaging */ st->reg = MAX1027_AVG_REG; ret = spi_write(st->spi, &st->reg, 1); -- 2.20.1