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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 05403FA3728 for ; Wed, 16 Oct 2019 22:04:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C746320872 for ; Wed, 16 Oct 2019 22:04:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571263491; bh=y7sgHoGnXAsezDdMfpycMHUY/pshOqLcSCc0e5fWPhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Yp3Ntr0P9UOfSKb8tKOfksg8/nOXIHEeHH+aWQAFc7hNOHvQtt2xaejV9M065uFLK 57Dbp+FLeieYzOScfVRFgbM9ox0rco+5KQ8wy3xCeKWR4cajHS3FtUF1/Jb4CpQyIl xw0n8zr8MlGrPIzsaLYZUoXjxnNXH7GUd0KiiHZw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406882AbfJPWEu (ORCPT ); Wed, 16 Oct 2019 18:04:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:53048 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438344AbfJPV66 (ORCPT ); Wed, 16 Oct 2019 17:58:58 -0400 Received: from localhost (unknown [192.55.54.58]) (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 E3E2821925; Wed, 16 Oct 2019 21:58:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571263138; bh=y7sgHoGnXAsezDdMfpycMHUY/pshOqLcSCc0e5fWPhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lqKaL00wTSY1xsmYWqKFVqeNIa1lzcFXyaF3t4jknZEqi94wG5CgcuoGsjgq3pD0f ER/gtGCW+9If+ZppLhSybvcc9hoIEcicmWYDOjvoek2+aDhOTQI1Rj7MYQN+B1P2xp OqKsg0hft5swCOsLCHnFDdFEy0gcYvYxBnCAd6wQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stefan Popa , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.3 061/112] iio: accel: adxl372: Perform a reset at start up Date: Wed, 16 Oct 2019 14:50:53 -0700 Message-Id: <20191016214900.706636626@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191016214844.038848564@linuxfoundation.org> References: <20191016214844.038848564@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefan Popa commit d9a997bd4d762d5bd8cc548d762902f58b5e0a74 upstream. 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: Greg Kroah-Hartman --- drivers/iio/accel/adxl372.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -575,6 +575,14 @@ static int adxl372_setup(struct adxl372_ 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;