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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D255CC433EF for ; Mon, 28 Feb 2022 17:56:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239120AbiB1R4v (ORCPT ); Mon, 28 Feb 2022 12:56:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239674AbiB1RxS (ORCPT ); Mon, 28 Feb 2022 12:53:18 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A5A60AA2E6; Mon, 28 Feb 2022 09:40:47 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DB149614CC; Mon, 28 Feb 2022 17:40:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F386DC340F0; Mon, 28 Feb 2022 17:40:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1646070031; bh=STnS/3RRWhsPBmCHC2DlFKfKbvwnvLdEGavJaXHMJJA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JHSaXV7XlX9crxCqcveNAqBz5n9iXkmcJyoWmRYb0028oyYbC4RxnulQ9FioRuoyn ogrN766rVv+JSOFYCmmbsUjfXbCidS0T7JaaXmQfAlKt8e4Mb362Zz6hDYbCH9EyGO 8HdRVkneeH9ceEWsDIF2xx4iilmByY3GJ/VWQ6x4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mario Tesi , Lorenzo Bianconi , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.15 101/139] iio: imu: st_lsm6dsx: wait for settling time in st_lsm6dsx_read_oneshot Date: Mon, 28 Feb 2022 18:24:35 +0100 Message-Id: <20220228172358.298857577@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220228172347.614588246@linuxfoundation.org> References: <20220228172347.614588246@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lorenzo Bianconi commit ea85bf906466191b58532bb19f4fbb4591f0a77e upstream. We need to wait for sensor settling time (~ 3/ODR) before reading data in st_lsm6dsx_read_oneshot routine in order to avoid corrupted samples. Fixes: 290a6ce11d93 ("iio: imu: add support to lsm6dsx driver") Reported-by: Mario Tesi Tested-by: Mario Tesi Signed-off-by: Lorenzo Bianconi Link: https://lore.kernel.org/r/b41ebda5535895298716c76d939f9f165fcd2d13.1644098120.git.lorenzo@kernel.org Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -1372,8 +1372,12 @@ static int st_lsm6dsx_read_oneshot(struc if (err < 0) return err; + /* + * we need to wait for sensor settling time before + * reading data in order to avoid corrupted samples + */ delay = 1000000000 / sensor->odr; - usleep_range(delay, 2 * delay); + usleep_range(3 * delay, 4 * delay); err = st_lsm6dsx_read_locked(hw, addr, &data, sizeof(data)); if (err < 0)