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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 4468AC2D0DA for ; Sun, 29 Dec 2019 17:30:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 173A6208E4 for ; Sun, 29 Dec 2019 17:30:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640656; bh=8xaA8IImLN6tZ/Xut72VS4k6WiqeYA4oVfAHV3SrLoU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kQ5fsV/h3DGoDSm3WfLmHydkWBeFAs+HtZcmn0YY7IL1saSi0caEzlD0hQfD90CQi 0GayFB3RX7uhi8pu5b0kygqHVzBavqOwuJdraE0c6cXZn5YsBA4Q2FUpRpF+Vi1GKL oJLVVkInlEKD6Dy+DZyQW6MM93523K8r4i5mqoT4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729022AbfL2Rat (ORCPT ); Sun, 29 Dec 2019 12:30:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:57314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728766AbfL2Ras (ORCPT ); Sun, 29 Dec 2019 12:30:48 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ADEC9208E4; Sun, 29 Dec 2019 17:30:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640648; bh=8xaA8IImLN6tZ/Xut72VS4k6WiqeYA4oVfAHV3SrLoU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LOcu0xF5kZTPmj+Ur8LaZPDIWRYESh3mALoVxQI+Xay1uddM8kMTfyVKMy2B75HEr uuFxw62JYEzN2NLLamwMUui7R6JTmzC8NNb0/CBS6YW4mpQHcdf6trBsYjxlKduQOH BMEPFIsA3LDgcQWmoGP+I5RMjR7PTk+yvC7fCAK0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miquel Raynal , Jonathan Cameron , Sasha Levin Subject: [PATCH 4.19 080/219] iio: adc: max1027: Reset the device at probe time Date: Sun, 29 Dec 2019 18:18:02 +0100 Message-Id: <20191229162517.783080437@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229162508.458551679@linuxfoundation.org> References: <20191229162508.458551679@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miquel Raynal [ Upstream commit db033831b4f5589f9fcbadb837614a7c4eac0308 ] 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 Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- 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 311c1a89c329..0939eb0384f1 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -460,6 +460,14 @@ static int max1027_probe(struct spi_device *spi) goto fail_dev_register; } + /* 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