From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Sean Nyekjaer <sean@geanix.com>
Cc: linux-iio@vger.kernel.org, jic23@kernel.org,
lorenzo.bianconi83@gmail.com, martin@geanix.com
Subject: Re: [PATCH 2/5] iio: imu: st_lsm6dsx: add motion events
Date: Tue, 18 Jun 2019 17:49:29 +0200 [thread overview]
Message-ID: <20190618154928.GB20044@localhost.localdomain> (raw)
In-Reply-To: <20190618125939.105903-3-sean@geanix.com>
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> Add event channels that controls the creation of motion events.
>
> Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> ---
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 2 +
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 148 ++++++++++++++++++-
> 2 files changed, 144 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> index a5e373680e9c..966cc6e91c7f 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> @@ -155,6 +155,8 @@ struct st_lsm6dsx_hw {
> u8 enable_mask;
> u8 ts_sip;
> u8 sip;
> + u8 event_threshold;
> + bool enable_event;
>
> u8 *buff;
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index b5d3fa354de7..351c46f01662 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -78,6 +78,17 @@
> #define ST_LSM6DSX_REG_GYRO_OUT_Y_L_ADDR 0x24
> #define ST_LSM6DSX_REG_GYRO_OUT_Z_L_ADDR 0x26
>
> +#define ST_LSM6DSX_REG_TAP_CFG_ADDR 0x58
> +#define ST_LSM6DSX_REG_TAP_CFG_INT_EN_MASK BIT(7)
> +#define ST_LSM6DSX_REG_TAP_CFG_INACT_EN_MASK GENMASK(6, 5)
> +
> +#define ST_LSM6DSX_DEFAULT_WAKE_THRESH 0
> +#define ST_LSM6DSX_REG_WAKE_UP_THS_ADDR 0x5B
> +#define ST_LSM6DSX_REG_WAKE_UP_THS_THRES_MASK GENMASK(5, 0)
Could you please verify this registermap is used for all supported devices?
(e.g. LSM6DS3 or LSM6DS3H)
> +
> +#define ST_LSM6DSX_REG_MD1_CFG_ADDR 0x5E
> +#define ST_LSM6DSX_REG_MD1_CFG_INT1_WU_MASK BIT(5)
> +
> #define ST_LSM6DSX_ACC_FS_2G_GAIN IIO_G_TO_M_S_2(61)
> #define ST_LSM6DSX_ACC_FS_4G_GAIN IIO_G_TO_M_S_2(122)
> #define ST_LSM6DSX_ACC_FS_8G_GAIN IIO_G_TO_M_S_2(244)
> @@ -303,6 +314,13 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> },
> };
>
> +static const struct iio_event_spec st_lsm6dsx_event = {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_EITHER,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE)
> +};
> +
> #define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx) \
> { \
> .type = chan_type, \
> @@ -319,6 +337,8 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .storagebits = 16, \
> .endianness = IIO_LE, \
> }, \
> + .event_spec = &st_lsm6dsx_event, \
> + .num_event_specs = 1, \
> }
ST_LSM6DSX_CHANNEL is used even for sensor-hub so I do not think you can use in
this way
>
> static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
> @@ -435,6 +455,20 @@ static int st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u16 odr)
> ST_LSM6DSX_SHIFT_VAL(val, reg->mask));
> }
>
> +static int st_lsm6dsx_set_event_threshold(struct st_lsm6dsx_hw *hw, u8 threshold)
> +{
> + int err = 0;
> +
> + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_WAKE_UP_THS_ADDR,
> + ST_LSM6DSX_REG_WAKE_UP_THS_THRES_MASK,
> + threshold);
> +
> + if (!err)
> + hw->event_threshold = threshold;
> +
> + return err;
I think we can just move this configuration in st_lsm6dsx_write_event()
> +}
> +
> int st_lsm6dsx_sensor_enable(struct st_lsm6dsx_sensor *sensor)
> {
> int err;
> @@ -472,18 +506,21 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
> int err, delay;
> __le16 data;
>
> - err = st_lsm6dsx_sensor_enable(sensor);
> - if (err < 0)
> - return err;
> + if (!hw->enable_event) {
> + err = st_lsm6dsx_sensor_enable(sensor);
> + if (err < 0)
> + return err;
>
> - delay = 1000000 / sensor->odr;
> - usleep_range(delay, 2 * delay);
> + delay = 1000000 / sensor->odr;
> + usleep_range(delay, 2 * delay);
> + }
>
> err = regmap_bulk_read(hw->regmap, addr, &data, sizeof(data));
> if (err < 0)
> return err;
>
> - st_lsm6dsx_sensor_disable(sensor);
> + if (!hw->enable_event)
> + st_lsm6dsx_sensor_disable(sensor);
>
> *val = (s16)le16_to_cpu(data);
>
> @@ -556,6 +593,75 @@ static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
> return err;
> }
>
> +static int st_lsm6dsx_read_event(struct iio_dev *iio_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 st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> +
> + *val2 = 0;
> + *val = sensor->hw->event_threshold;
> +
> + return IIO_VAL_INT;
> +}
> +
> +static int st_lsm6dsx_write_event(struct iio_dev *iio_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 st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> + struct st_lsm6dsx_hw *hw = sensor->hw;
> +
> + if (!hw->enable_event)
> + return -EBUSY;
> +
> + if ((val < 0) || (val > 31))
unnecessary brackets
> + return -EINVAL;
> +
> + if (st_lsm6dsx_set_event_threshold(sensor->hw, val))
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static int st_lsm6dsx_read_event_config(struct iio_dev *iio_dev,
> + const struct iio_chan_spec *chan,
> + enum iio_event_type type,
> + enum iio_event_direction dir)
> +{
> + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> + struct st_lsm6dsx_hw *hw = sensor->hw;
> +
> + return hw->enable_event;
> +}
> +
> +static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev,
> + const struct iio_chan_spec *chan,
> + enum iio_event_type type,
> + enum iio_event_direction dir,
> + int state)
> +{
> + struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> + struct st_lsm6dsx_hw *hw = sensor->hw;
> +
> + if (state && hw->enable_event)
> + return 0;
> +
> + hw->enable_event = state;
> + if (state)
> + st_lsm6dsx_sensor_enable(sensor);
please correct me if I am wrong but in this way we break normal operation (e.g.
if we are reading acc data from the FIFO). You need to check enabled_mask.
Moreover we should check event type
> + else
> + st_lsm6dsx_sensor_disable(sensor);
> +
> + return 0;
> +}
> +
> static int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val)
> {
> struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> @@ -632,6 +738,10 @@ static const struct iio_info st_lsm6dsx_acc_info = {
> .attrs = &st_lsm6dsx_acc_attribute_group,
> .read_raw = st_lsm6dsx_read_raw,
> .write_raw = st_lsm6dsx_write_raw,
> + .read_event_value = st_lsm6dsx_read_event,
> + .write_event_value = st_lsm6dsx_write_event,
> + .read_event_config = st_lsm6dsx_read_event_config,
> + .write_event_config = st_lsm6dsx_write_event_config,
> .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
> };
>
> @@ -761,6 +871,8 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw)
> if (err < 0)
> return err;
>
> + st_lsm6dsx_set_event_threshold(hw, ST_LSM6DSX_DEFAULT_WAKE_THRESH);
we do not need this since default value is already 0
> +
> return st_lsm6dsx_init_hw_timer(hw);
> }
>
> @@ -811,6 +923,27 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
> return iio_dev;
> }
>
> +int st_lsm6dsx_event_setup(struct st_lsm6dsx_hw *hw)
> +{
> + int err;
> +
> + /* Enable inactivity function - low power ACC, GYRO powered-down */
> + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_TAP_CFG_ADDR,
> + ST_LSM6DSX_REG_TAP_CFG_INT_EN_MASK |
> + ST_LSM6DSX_REG_TAP_CFG_INACT_EN_MASK,
> + ST_LSM6DSX_REG_TAP_CFG_INT_EN_MASK |
> + ST_LSM6DSX_REG_TAP_CFG_INACT_EN_MASK);
> + if (err < 0)
> + return err;
> +
> + /* Enable wakeup interrupt */
> + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_MD1_CFG_ADDR,
> + ST_LSM6DSX_REG_MD1_CFG_INT1_WU_MASK,
> + ST_LSM6DSX_REG_MD1_CFG_INT1_WU_MASK);
> +
> + return err;
> +}
> +
> static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
> {
> struct st_lsm6dsx_hw *hw = private;
> @@ -932,6 +1065,9 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, const char *name,
> err = st_lsm6dsx_fifo_setup(hw);
> if (err < 0)
> return err;
> + err = st_lsm6dsx_event_setup(hw);
> + if (err < 0)
> + return err;
> }
>
> for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
> --
> 2.22.0
>
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next prev parent reply other threads:[~2019-06-18 15:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-18 12:59 [PATCH 0/5] iio: imu: st_lsm6dsx: add event reporting and wakeup Sean Nyekjaer
2019-06-18 12:59 ` [PATCH 1/5] iio: imu: st_lsm6dsx: move interrupt thread to core Sean Nyekjaer
2019-06-18 15:57 ` Lorenzo Bianconi
2019-06-18 16:56 ` Sean Nyekjær
2019-06-19 5:58 ` Lorenzo Bianconi
2019-06-19 6:01 ` Sean Nyekjaer
2019-06-18 12:59 ` [PATCH 2/5] iio: imu: st_lsm6dsx: add motion events Sean Nyekjaer
2019-06-18 15:49 ` Lorenzo Bianconi [this message]
2019-06-18 19:14 ` Sean Nyekjaer
2019-06-18 20:21 ` Lorenzo Bianconi
2019-06-19 6:30 ` Sean Nyekjaer
2019-06-18 12:59 ` [PATCH 3/5] iio: imu: st_lsm6dsx: add wakeup-source option Sean Nyekjaer
2019-06-18 15:51 ` Lorenzo Bianconi
2019-06-18 19:19 ` Sean Nyekjaer
2019-06-18 20:27 ` Lorenzo Bianconi
2019-07-01 11:06 ` Sean Nyekjaer
2019-06-18 12:59 ` [PATCH 4/5] iio: imu: st_lsm6dsx: always enter interrupt thread Sean Nyekjaer
2019-06-18 15:55 ` Lorenzo Bianconi
2019-06-18 19:31 ` Sean Nyekjaer
2019-06-18 20:24 ` Lorenzo Bianconi
2019-06-22 9:55 ` Jonathan Cameron
2019-06-22 12:23 ` Lorenzo Bianconi
2019-06-18 12:59 ` [PATCH 5/5] iio: imu: st_lsm6dsx: add motion report function and call from interrupt Sean Nyekjaer
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