From patchwork Tue Feb 25 12:09:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Tachici X-Patchwork-Id: 11403421 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C651417E0 for ; Tue, 25 Feb 2020 12:09:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B16BD24670 for ; Tue, 25 Feb 2020 12:09:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729066AbgBYMJa (ORCPT ); Tue, 25 Feb 2020 07:09:30 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:6628 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729458AbgBYMJa (ORCPT ); Tue, 25 Feb 2020 07:09:30 -0500 Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01PC71q6010543; Tue, 25 Feb 2020 07:09:29 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 2yb23agfxh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Feb 2020 07:09:29 -0500 Received: from SCSQMBX11.ad.analog.com (scsqmbx11.ad.analog.com [10.77.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 01PC9Run058798 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Tue, 25 Feb 2020 07:09:28 -0500 Received: from SCSQMBX10.ad.analog.com (10.77.17.5) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 25 Feb 2020 04:09:26 -0800 Received: from zeus.spd.analog.com (10.64.82.11) by SCSQMBX10.ad.analog.com (10.77.17.5) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Tue, 25 Feb 2020 04:09:26 -0800 Received: from tachici-Precision-5530.ad.analog.com ([10.48.65.175]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 01PC9N1D003238; Tue, 25 Feb 2020 07:09:25 -0500 From: Alexandru Tachici To: , CC: Subject: [PATCH v2 1/6] iio: accel: adxl372: Add support for FIFO peak mode Date: Tue, 25 Feb 2020 14:09:04 +0200 Message-ID: <20200225120909.12629-2-alexandru.tachici@analog.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200225120909.12629-1-alexandru.tachici@analog.com> References: <20200225120909.12629-1-alexandru.tachici@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-25_03:2020-02-21,2020-02-25 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 impostorscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002250098 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Stefan Popa By default, if all three channels (x, y, z) are enabled, sample sets of concurrent 3-axis data is stored in the FIFO. This patch adds the option to configure the FIFO to store peak acceleration (x, y and z) of every over-threshold event. Since we cannot store 1 or 2 axis peak acceleration data in the FIFO, then all three axis need to be enabled in order for this mode to work. Signed-off-by: Stefan Popa --- drivers/iio/accel/adxl372.c | 46 +++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c index 67b8817995c0..ed93534f8dba 100644 --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -264,6 +264,7 @@ struct adxl372_state { u8 int2_bitmask; u16 watermark; __be16 fifo_buf[ADXL372_FIFO_SIZE]; + bool peak_fifo_mode_en; }; static const unsigned long adxl372_channel_masks[] = { @@ -722,6 +723,40 @@ static int adxl372_write_raw(struct iio_dev *indio_dev, } } +static ssize_t adxl372_peak_fifo_en_get(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct adxl372_state *st = iio_priv(dev_to_iio_dev(dev)); + + return sprintf(buf, "%d\n", st->peak_fifo_mode_en); +} + +static ssize_t adxl372_peak_fifo_en_set(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adxl372_state *st = iio_priv(indio_dev); + bool val; + int ret; + + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + + ret = kstrtobool(buf, &val); + if (ret) + return ret; + + st->peak_fifo_mode_en = val; + + return len; +} + +static IIO_DEVICE_ATTR(buffer_peak_mode_enable, 0644, + adxl372_peak_fifo_en_get, + adxl372_peak_fifo_en_set, 0); + static ssize_t adxl372_show_filter_freq_avail(struct device *dev, struct device_attribute *attr, char *buf) @@ -817,11 +852,21 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev) st->fifo_format = adxl372_axis_lookup_table[i].fifo_format; st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask, indio_dev->masklength); + + /* Configure the FIFO to store sets of impact event peak. */ + if (st->peak_fifo_mode_en) { + st->fifo_format = ADXL372_XYZ_PEAK_FIFO; + if (st->fifo_set_size != 3) + dev_warn(&indio_dev->dev, + "All axis must be enabled in peak mode."); + } + /* * The 512 FIFO samples can be allotted in several ways, such as: * 170 sample sets of concurrent 3-axis data * 256 sample sets of concurrent 2-axis data (user selectable) * 512 sample sets of single-axis data + * 170 sets of impact event peak (x, y, z) */ if ((st->watermark * st->fifo_set_size) > ADXL372_FIFO_SIZE) st->watermark = (ADXL372_FIFO_SIZE / st->fifo_set_size); @@ -894,6 +939,7 @@ static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, static struct attribute *adxl372_attributes[] = { &iio_const_attr_sampling_frequency_available.dev_attr.attr, &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr, + &iio_dev_attr_buffer_peak_mode_enable.dev_attr.attr, NULL, };