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[23.128.96.18]) by mx.google.com with ESMTP id n8si1851845eda.580.2020.08.29.10.44.38; Sat, 29 Aug 2020 10:45:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=GJK10xbC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728320AbgH2Rn4 (ORCPT + 99 others); Sat, 29 Aug 2020 13:43:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:43018 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728203AbgH2Rn4 (ORCPT ); Sat, 29 Aug 2020 13:43:56 -0400 Received: from archlinux (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (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 B252C20757; Sat, 29 Aug 2020 17:43:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598723034; bh=34xobfX3qoz2hhxnasUyN/BjM4TN/ZfkSAfscHAVfac=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=GJK10xbC9VhN/z6vxOS7sb5TgWo9TkNhyuSQnjJE9MFimmhHuxTJBdK6p67hMyTNI v9/nWjn6BiDkqBLe09KTDspOmyDmNk5+RwCPEyEWC6WyI34zddWVojhKvc4eKMMT8n /7JrbAhbzka+7H/kJkD66caJfTPSwpYTT7s/ys58= Date: Sat, 29 Aug 2020 18:43:50 +0100 From: Jonathan Cameron To: Cc: , Subject: Re: [PATCH v5 1/2] iio: accel: adxl372: Add support for FIFO peak mode Message-ID: <20200829184350.5ee8c3db@archlinux> In-Reply-To: <20200810093257.65929-2-alexandru.tachici@analog.com> References: <20200810093257.65929-1-alexandru.tachici@analog.com> <20200810093257.65929-2-alexandru.tachici@analog.com> X-Mailer: Claws Mail 3.17.6 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 10 Aug 2020 12:32:56 +0300 wrote: > 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. When pushing to iio buffer we push only enabled > axis data. > > Currently the driver configures adxl372 to work in loop mode. > The inactivity and activity timings decide how fast the chip > will loop through the awake and waiting states and the > thresholds on x,y,z axis decide when activity or inactivity > will be detected. > > This patch adds standard events sysfs entries for the inactivity > and activity timings: thresh_falling_period/thresh_rising_period > and for the in_accel_x_thresh_falling/rising_value. > > Signed-off-by: Stefan Popa > Signed-off-by: Alexandru Tachici Hi Alexandru, This didn't go in remotely cleanly because of fuzz from moving the pollfunc attach / detach into the core which seems to have crossed with it. I think I have it correct, but please check and let me know if there are any problems. Pushed out as testing for the autobuilders to poke at it as well. thanks, Jonathan > --- > drivers/iio/accel/adxl372.c | 302 +++++++++++++++++++++++++++++++++++- > 1 file changed, 294 insertions(+), 8 deletions(-) > > diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c > index 67b8817995c0..4cad16e2f7b7 100644 > --- a/drivers/iio/accel/adxl372.c > +++ b/drivers/iio/accel/adxl372.c > @@ -5,6 +5,7 @@ > * Copyright 2018 Analog Devices Inc. > */ > > +#include > #include > #include > #include > @@ -113,6 +114,11 @@ > #define ADXL372_STATUS_1_AWAKE(x) (((x) >> 6) & 0x1) > #define ADXL372_STATUS_1_ERR_USR_REGS(x) (((x) >> 7) & 0x1) > > +/* ADXL372_STATUS_2 */ > +#define ADXL372_STATUS_2_INACT(x) (((x) >> 4) & 0x1) > +#define ADXL372_STATUS_2_ACT(x) (((x) >> 5) & 0x1) > +#define ADXL372_STATUS_2_AC2(x) (((x) >> 6) & 0x1) > + > /* ADXL372_INT1_MAP */ > #define ADXL372_INT1_MAP_DATA_RDY_MSK BIT(0) > #define ADXL372_INT1_MAP_DATA_RDY_MODE(x) (((x) & 0x1) << 0) > @@ -131,8 +137,17 @@ > #define ADXL372_INT1_MAP_LOW_MSK BIT(7) > #define ADXL372_INT1_MAP_LOW_MODE(x) (((x) & 0x1) << 7) > > +/* ADX372_THRESH */ > +#define ADXL372_THRESH_VAL_H_MSK GENMASK(10, 3) > +#define ADXL372_THRESH_VAL_H_SEL(x) FIELD_GET(ADXL372_THRESH_VAL_H_MSK, x) > +#define ADXL372_THRESH_VAL_L_MSK GENMASK(2, 0) > +#define ADXL372_THRESH_VAL_L_SEL(x) FIELD_GET(ADXL372_THRESH_VAL_L_MSK, x) > + > /* The ADXL372 includes a deep, 512 sample FIFO buffer */ > #define ADXL372_FIFO_SIZE 512 > +#define ADXL372_X_AXIS_EN(x) ((x) & BIT(0)) > +#define ADXL372_Y_AXIS_EN(x) ((x) & BIT(1)) > +#define ADXL372_Z_AXIS_EN(x) ((x) & BIT(2)) > > /* > * At +/- 200g with 12-bit resolution, scale is computed as: > @@ -222,6 +237,20 @@ static const struct adxl372_axis_lookup adxl372_axis_lookup_table[] = { > { BIT(0) | BIT(1) | BIT(2), ADXL372_XYZ_FIFO }, > }; > > +static const struct iio_event_spec adxl372_events[] = { > + { > + .type = IIO_EV_TYPE_THRESH, > + .dir = IIO_EV_DIR_RISING, > + .mask_separate = BIT(IIO_EV_INFO_VALUE), > + .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD) | BIT(IIO_EV_INFO_ENABLE), > + }, { > + .type = IIO_EV_TYPE_THRESH, > + .dir = IIO_EV_DIR_FALLING, > + .mask_separate = BIT(IIO_EV_INFO_VALUE), > + .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD) | BIT(IIO_EV_INFO_ENABLE), > + }, > +}; > + > #define ADXL372_ACCEL_CHANNEL(index, reg, axis) { \ > .type = IIO_ACCEL, \ > .address = reg, \ > @@ -238,6 +267,8 @@ static const struct adxl372_axis_lookup adxl372_axis_lookup_table[] = { > .storagebits = 16, \ > .shift = 4, \ > }, \ > + .event_spec = adxl372_events, \ > + .num_event_specs = ARRAY_SIZE(adxl372_events) \ > } > > static const struct iio_chan_spec adxl372_channels[] = { > @@ -251,8 +282,10 @@ struct adxl372_state { > struct device *dev; > struct regmap *regmap; > struct iio_trigger *dready_trig; > + struct iio_trigger *peak_datardy_trig; > enum adxl372_fifo_mode fifo_mode; > enum adxl372_fifo_format fifo_format; > + unsigned int fifo_axis_mask; > enum adxl372_op_mode op_mode; > enum adxl372_act_proc_mode act_proc_mode; > enum adxl372_odr odr; > @@ -264,6 +297,8 @@ struct adxl372_state { > u8 int2_bitmask; > u16 watermark; > __be16 fifo_buf[ADXL372_FIFO_SIZE]; > + bool peak_fifo_mode_en; > + struct mutex threshold_m; /* lock for threshold */ > }; > > static const unsigned long adxl372_channel_masks[] = { > @@ -275,6 +310,45 @@ static const unsigned long adxl372_channel_masks[] = { > 0 > }; > > +static ssize_t adxl372_read_threshold_value(struct iio_dev *indio_dev, unsigned int addr, > + u16 *threshold) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + __be16 raw_regval; > + u16 regval; > + int ret; > + > + ret = regmap_bulk_read(st->regmap, addr, &raw_regval, sizeof(raw_regval)); > + if (ret < 0) > + return ret; > + > + regval = be16_to_cpu(raw_regval); > + regval >>= 5; > + > + *threshold = regval; > + > + return 0; > +} > + > +static ssize_t adxl372_write_threshold_value(struct iio_dev *indio_dev, unsigned int addr, > + u16 threshold) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + int ret; > + > + mutex_lock(&st->threshold_m); > + ret = regmap_write(st->regmap, addr, ADXL372_THRESH_VAL_H_SEL(threshold)); > + if (ret < 0) > + return ret; > + > + ret = regmap_update_bits(st->regmap, addr + 1, GENMASK(7, 5), > + ADXL372_THRESH_VAL_L_SEL(threshold) << 5); > + > + mutex_unlock(&st->threshold_m); > + > + return ret; > +} > + > static int adxl372_read_axis(struct adxl372_state *st, u8 addr) > { > __be16 regval; > @@ -522,6 +596,39 @@ static int adxl372_get_status(struct adxl372_state *st, > return ret; > } > > +static void adxl372_arrange_axis_data(struct adxl372_state *st, __be16 *sample) > +{ > + __be16 axis_sample[3]; > + int i = 0; > + > + memset(axis_sample, 0, 3 * sizeof(__be16)); > + if (ADXL372_X_AXIS_EN(st->fifo_axis_mask)) > + axis_sample[i++] = sample[0]; > + if (ADXL372_Y_AXIS_EN(st->fifo_axis_mask)) > + axis_sample[i++] = sample[1]; > + if (ADXL372_Z_AXIS_EN(st->fifo_axis_mask)) > + axis_sample[i++] = sample[2]; > + > + memcpy(sample, axis_sample, 3 * sizeof(__be16)); > +} > + > +static void adxl372_push_event(struct iio_dev *indio_dev, s64 timestamp, u8 status2) > +{ > + unsigned int ev_dir = IIO_EV_DIR_NONE; > + > + if (ADXL372_STATUS_2_ACT(status2)) > + ev_dir = IIO_EV_DIR_RISING; > + > + if (ADXL372_STATUS_2_INACT(status2)) > + ev_dir = IIO_EV_DIR_FALLING; > + > + if (ev_dir != IIO_EV_DIR_NONE) > + iio_push_event(indio_dev, > + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z, > + IIO_EV_TYPE_THRESH, ev_dir), > + timestamp); > +} > + > static irqreturn_t adxl372_trigger_handler(int irq, void *p) > { > struct iio_poll_func *pf = p; > @@ -535,6 +642,8 @@ static irqreturn_t adxl372_trigger_handler(int irq, void *p) > if (ret < 0) > goto err; > > + adxl372_push_event(indio_dev, iio_get_time_ns(indio_dev), status2); > + > if (st->fifo_mode != ADXL372_FIFO_BYPASSED && > ADXL372_STATUS_1_FIFO_FULL(status1)) { > /* > @@ -553,8 +662,12 @@ static irqreturn_t adxl372_trigger_handler(int irq, void *p) > goto err; > > /* Each sample is 2 bytes */ > - for (i = 0; i < fifo_entries; i += st->fifo_set_size) > + for (i = 0; i < fifo_entries; i += st->fifo_set_size) { > + /* filter peak detection data */ > + if (st->peak_fifo_mode_en) > + adxl372_arrange_axis_data(st, &st->fifo_buf[i]); > iio_push_to_buffers(indio_dev, &st->fifo_buf[i]); > + } > } > err: > iio_trigger_notify_done(indio_dev->trig); > @@ -722,6 +835,129 @@ static int adxl372_write_raw(struct iio_dev *indio_dev, > } > } > > +static int adxl372_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, > + enum iio_event_type type, enum iio_event_direction dir, > + enum iio_event_info info, int *val, int *val2) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + unsigned int addr; > + u16 raw_value; > + int ret; > + > + switch (info) { > + case IIO_EV_INFO_VALUE: > + switch (dir) { > + case IIO_EV_DIR_RISING: > + addr = ADXL372_X_THRESH_ACT_H + 2 * chan->scan_index; > + ret = adxl372_read_threshold_value(indio_dev, addr, &raw_value); > + if (ret < 0) > + return ret; > + *val = raw_value * ADXL372_USCALE; > + *val2 = 1000000; > + return IIO_VAL_FRACTIONAL; > + case IIO_EV_DIR_FALLING: > + addr = ADXL372_X_THRESH_INACT_H + 2 * chan->scan_index; > + ret = adxl372_read_threshold_value(indio_dev, addr, &raw_value); > + if (ret < 0) > + return ret; > + *val = raw_value * ADXL372_USCALE; > + *val2 = 1000000; > + return IIO_VAL_FRACTIONAL; > + default: > + return -EINVAL; > + } > + case IIO_EV_INFO_PERIOD: > + switch (dir) { > + case IIO_EV_DIR_RISING: > + *val = st->act_time_ms; > + *val2 = 1000; > + return IIO_VAL_FRACTIONAL; > + case IIO_EV_DIR_FALLING: > + *val = st->inact_time_ms; > + *val2 = 1000; > + return IIO_VAL_FRACTIONAL; > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +static int adxl372_write_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, > + enum iio_event_type type, enum iio_event_direction dir, > + enum iio_event_info info, int val, int val2) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + unsigned int val_ms; > + unsigned int addr; > + u16 raw_val; > + > + switch (info) { > + case IIO_EV_INFO_VALUE: > + raw_val = DIV_ROUND_UP(val * 1000000, ADXL372_USCALE); > + switch (dir) { > + case IIO_EV_DIR_RISING: > + addr = ADXL372_X_THRESH_ACT_H + 2 * chan->scan_index; > + return adxl372_write_threshold_value(indio_dev, addr, raw_val); > + case IIO_EV_DIR_FALLING: > + addr = ADXL372_X_THRESH_INACT_H + 2 * chan->scan_index; > + return adxl372_write_threshold_value(indio_dev, addr, raw_val); > + default: > + return -EINVAL; > + } > + case IIO_EV_INFO_PERIOD: > + val_ms = val * 1000 + DIV_ROUND_UP(val2, 1000); > + switch (dir) { > + case IIO_EV_DIR_RISING: > + return adxl372_set_activity_time_ms(st, val_ms); > + case IIO_EV_DIR_FALLING: > + return adxl372_set_inactivity_time_ms(st, val_ms); > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +static int adxl372_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, > + enum iio_event_type type, enum iio_event_direction dir) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + > + switch (dir) { > + case IIO_EV_DIR_RISING: > + return FIELD_GET(ADXL372_INT1_MAP_ACT_MSK, st->int1_bitmask); > + case IIO_EV_DIR_FALLING: > + return FIELD_GET(ADXL372_INT1_MAP_INACT_MSK, st->int1_bitmask); > + default: > + return -EINVAL; > + } > +} > + > +static int adxl372_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, > + enum iio_event_type type, enum iio_event_direction dir, > + int state) > +{ > + struct adxl372_state *st = iio_priv(indio_dev); > + > + switch (dir) { > + case IIO_EV_DIR_RISING: > + set_mask_bits(&st->int1_bitmask, ADXL372_INT1_MAP_ACT_MSK, > + ADXL372_INT1_MAP_ACT_MODE(state)); > + break; > + case IIO_EV_DIR_FALLING: > + set_mask_bits(&st->int1_bitmask, ADXL372_INT1_MAP_INACT_MSK, > + ADXL372_INT1_MAP_INACT_MODE(state)); > + break; > + default: > + return -EINVAL; > + } > + > + return adxl372_set_interrupts(st, st->int1_bitmask, 0); > +} > + > static ssize_t adxl372_show_filter_freq_avail(struct device *dev, > struct device_attribute *attr, > char *buf) > @@ -798,7 +1034,8 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev) > if (ret < 0) > return ret; > > - ret = adxl372_set_interrupts(st, ADXL372_INT1_MAP_FIFO_FULL_MSK, 0); > + st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK; > + ret = adxl372_set_interrupts(st, st->int1_bitmask, 0); > if (ret < 0) > goto err; > > @@ -815,13 +1052,22 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev) > } > > st->fifo_format = adxl372_axis_lookup_table[i].fifo_format; > + st->fifo_axis_mask = adxl372_axis_lookup_table[i].bits; > 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_set_size = 3; > + st->fifo_format = ADXL372_XYZ_PEAK_FIFO; > + } > + > /* > * 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); > @@ -831,7 +1077,8 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev) > ret = adxl372_configure_fifo(st); > if (ret < 0) { > st->fifo_mode = ADXL372_FIFO_BYPASSED; > - adxl372_set_interrupts(st, 0, 0); > + st->int1_bitmask &= ~ADXL372_INT1_MAP_FIFO_FULL_MSK; > + adxl372_set_interrupts(st, st->int1_bitmask, 0); > goto err; > } > > @@ -846,7 +1093,8 @@ static int adxl372_buffer_predisable(struct iio_dev *indio_dev) > { > struct adxl372_state *st = iio_priv(indio_dev); > > - adxl372_set_interrupts(st, 0, 0); > + st->int1_bitmask &= ~ADXL372_INT1_MAP_FIFO_FULL_MSK; > + adxl372_set_interrupts(st, st->int1_bitmask, 0); > st->fifo_mode = ADXL372_FIFO_BYPASSED; > adxl372_configure_fifo(st); > > @@ -863,12 +1111,11 @@ static int adxl372_dready_trig_set_state(struct iio_trigger *trig, > { > struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); > struct adxl372_state *st = iio_priv(indio_dev); > - unsigned long int mask = 0; > > if (state) > - mask = ADXL372_INT1_MAP_FIFO_FULL_MSK; > + st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK; > > - return adxl372_set_interrupts(st, mask, 0); > + return adxl372_set_interrupts(st, st->int1_bitmask, 0); > } > > static int adxl372_validate_trigger(struct iio_dev *indio_dev, > @@ -876,7 +1123,7 @@ static int adxl372_validate_trigger(struct iio_dev *indio_dev, > { > struct adxl372_state *st = iio_priv(indio_dev); > > - if (st->dready_trig != trig) > + if (st->dready_trig != trig && st->peak_datardy_trig != trig) > return -EINVAL; > > return 0; > @@ -887,6 +1134,25 @@ static const struct iio_trigger_ops adxl372_trigger_ops = { > .set_trigger_state = adxl372_dready_trig_set_state, > }; > > +static int adxl372_peak_dready_trig_set_state(struct iio_trigger *trig, > + bool state) > +{ > + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); > + struct adxl372_state *st = iio_priv(indio_dev); > + > + if (state) > + st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK; > + > + st->peak_fifo_mode_en = state; > + > + return adxl372_set_interrupts(st, st->int1_bitmask, 0); > +} > + > +static const struct iio_trigger_ops adxl372_peak_data_trigger_ops = { > + .validate_device = &iio_trigger_validate_own_device, > + .set_trigger_state = adxl372_peak_dready_trig_set_state, > +}; > + > static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("400 800 1600 3200 6400"); > static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, > 0444, adxl372_show_filter_freq_avail, NULL, 0); > @@ -906,6 +1172,10 @@ static const struct iio_info adxl372_info = { > .attrs = &adxl372_attrs_group, > .read_raw = adxl372_read_raw, > .write_raw = adxl372_write_raw, > + .read_event_config = adxl372_read_event_config, > + .write_event_config = adxl372_write_event_config, > + .read_event_value = adxl372_read_event_value, > + .write_event_value = adxl372_write_event_value, > .debugfs_reg_access = &adxl372_reg_access, > .hwfifo_set_watermark = adxl372_set_watermark, > }; > @@ -934,6 +1204,8 @@ int adxl372_probe(struct device *dev, struct regmap *regmap, > st->regmap = regmap; > st->irq = irq; > > + mutex_init(&st->threshold_m); > + > indio_dev->channels = adxl372_channels; > indio_dev->num_channels = ARRAY_SIZE(adxl372_channels); > indio_dev->available_scan_masks = adxl372_channel_masks; > @@ -965,13 +1237,27 @@ int adxl372_probe(struct device *dev, struct regmap *regmap, > if (st->dready_trig == NULL) > return -ENOMEM; > > + st->peak_datardy_trig = devm_iio_trigger_alloc(dev, > + "%s-dev%d-peak", > + indio_dev->name, > + indio_dev->id); > + if (!st->peak_datardy_trig) > + return -ENOMEM; > + > st->dready_trig->ops = &adxl372_trigger_ops; > + st->peak_datardy_trig->ops = &adxl372_peak_data_trigger_ops; > st->dready_trig->dev.parent = dev; > + st->peak_datardy_trig->dev.parent = dev; > iio_trigger_set_drvdata(st->dready_trig, indio_dev); > + iio_trigger_set_drvdata(st->peak_datardy_trig, indio_dev); > ret = devm_iio_trigger_register(dev, st->dready_trig); > if (ret < 0) > return ret; > > + ret = devm_iio_trigger_register(dev, st->peak_datardy_trig); > + if (ret < 0) > + return ret; > + > indio_dev->trig = iio_trigger_get(st->dready_trig); > > ret = devm_request_threaded_irq(dev, st->irq,