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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 86423CA9EA9 for ; Fri, 18 Oct 2019 22:24:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F029205C9 for ; Fri, 18 Oct 2019 22:24:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571437466; bh=1a7w7GetW5FhHuRCvaMI7Qle4+x0C2k7Ge+UODumWyk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rcKGiYBhi3QUXUbr/lrT340cjUtjdSxHkXl7UL/TuKP25ywqbzNtbSCo+3xp1kuWW l37V+aRx1vf5Fzq7/2cn/KXwwLjSCJFTTasF5aEaYvvB3/7b4Cna+h0IJ/kHJU5J0x fW5W+4DpOJneCqtiUIa9RmmrpXBb1tJtK/WNI/xs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729336AbfJRWYW (ORCPT ); Fri, 18 Oct 2019 18:24:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:36820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729035AbfJRWFB (ORCPT ); Fri, 18 Oct 2019 18:05:01 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4F542222CD; Fri, 18 Oct 2019 22:05:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571436301; bh=1a7w7GetW5FhHuRCvaMI7Qle4+x0C2k7Ge+UODumWyk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ddaftopwMGTzQDX46oQMo+dzQbSkd3fhv+O29K8Uia45O0LVzJhQIkOoJbR989OyI 7Zrlqbdi3luP9NnaQNZXY5EEIKocpySNDWn+9njgXJkFyH4aTnUlV2OEEqcTzdwXVD 9qvY7kYnpeTZ4A5lcUnf4dfaFdVq9xT2mbnTiPWI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Stefan Popa , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin , linux-iio@vger.kernel.org Subject: [PATCH AUTOSEL 5.3 72/89] iio: accel: adxl372: Perform a reset at start up Date: Fri, 18 Oct 2019 18:03:07 -0400 Message-Id: <20191018220324.8165-72-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191018220324.8165-1-sashal@kernel.org> References: <20191018220324.8165-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Stefan Popa [ Upstream commit d9a997bd4d762d5bd8cc548d762902f58b5e0a74 ] We need to perform a reset a start up to make sure that the chip is in a consistent state. This reset also disables all the interrupts which should only be enabled together with the iio buffer. Not doing this, was sometimes causing unwanted interrupts to trigger. Signed-off-by: Stefan Popa Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support") Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/accel/adxl372.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c index fbad4b45fe42d..67b8817995c04 100644 --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -575,6 +575,14 @@ static int adxl372_setup(struct adxl372_state *st) return -ENODEV; } + /* + * Perform a software reset to make sure the device is in a consistent + * state after start up. + */ + ret = regmap_write(st->regmap, ADXL372_RESET, ADXL372_RESET_CODE); + if (ret < 0) + return ret; + ret = adxl372_set_op_mode(st, ADXL372_STANDBY); if (ret < 0) return ret; -- 2.20.1