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iio: imu: st_lsm6dsx: add tap event detection

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In order to allow sensors to advertise tap event capability and report tap
events, define a new struct iio_event_spec array that includes a tap event
spec, and a new struct iio_chan_spec array that references the new
iio_event_spec array; for the LSM6DSV chip family, use the new
iio_chan_spec array and define an event source for tap events.
Tested on LSMDSV16X.

Signed-off-by: Francesco Lavra <flavra@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Francesco Lavra 2025-12-01 11:00:18 +01:00 committed by Jonathan Cameron
parent 317c9bef82
commit ce40e01d7c
2 changed files with 56 additions and 2 deletions
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1
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
View File

@ -263,6 +263,7 @@ struct st_lsm6dsx_shub_settings {
enum st_lsm6dsx_event_id {
ST_LSM6DSX_EVENT_WAKEUP,
ST_LSM6DSX_EVENT_TAP,
ST_LSM6DSX_EVENT_MAX
};

57
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
View File

@ -103,6 +103,21 @@ static const struct iio_event_spec st_lsm6dsx_ev_motion[] = {
},
};
static const struct iio_event_spec st_lsm6dsx_ev_motion_tap[] = {
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_EITHER,
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_ENABLE),
},
{
.type = IIO_EV_TYPE_GESTURE,
.dir = IIO_EV_DIR_SINGLETAP,
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_ENABLE),
},
};
static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
ST_LSM6DSX_CHANNEL_ACC(0x28, IIO_MOD_X, 0, st_lsm6dsx_ev_motion),
ST_LSM6DSX_CHANNEL_ACC(0x2a, IIO_MOD_Y, 1, st_lsm6dsx_ev_motion),
@ -110,6 +125,13 @@ static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(3),
};
static const struct iio_chan_spec st_lsm6dsx_acc_tap_channels[] = {
ST_LSM6DSX_CHANNEL_ACC(0x28, IIO_MOD_X, 0, st_lsm6dsx_ev_motion_tap),
ST_LSM6DSX_CHANNEL_ACC(0x2a, IIO_MOD_Y, 1, st_lsm6dsx_ev_motion_tap),
ST_LSM6DSX_CHANNEL_ACC(0x2c, IIO_MOD_Z, 2, st_lsm6dsx_ev_motion_tap),
IIO_CHAN_SOFT_TIMESTAMP(3),
};
static const struct iio_chan_spec st_lsm6dsx_gyro_channels[] = {
ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x22, IIO_MOD_X, 0),
ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x24, IIO_MOD_Y, 1),
@ -1255,8 +1277,8 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
.channels = {
[ST_LSM6DSX_ID_ACC] = {
.chan = st_lsm6dsx_acc_channels,
.len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
.chan = st_lsm6dsx_acc_tap_channels,
.len = ARRAY_SIZE(st_lsm6dsx_acc_tap_channels),
},
[ST_LSM6DSX_ID_GYRO] = {
.chan = st_lsm6dsx_gyro_channels,
@ -1435,6 +1457,32 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.status_y_mask = BIT(1),
.status_x_mask = BIT(2),
},
[ST_LSM6DSX_EVENT_TAP] = {
.x_value = {
.addr = 0x57,
.mask = GENMASK(4, 0),
},
.y_value = {
.addr = 0x58,
.mask = GENMASK(4, 0),
},
.z_value = {
.addr = 0x59,
.mask = GENMASK(4, 0),
},
.enable_mask = BIT(6),
.enable_axis_reg = 0x56,
.enable_x_mask = BIT(3),
.enable_y_mask = BIT(2),
.enable_z_mask = BIT(1),
.status = {
.addr = 0x46,
.mask = BIT(5),
},
.status_x_mask = BIT(2),
.status_y_mask = BIT(1),
.status_z_mask = BIT(0),
},
},
},
},
@ -1949,6 +1997,8 @@ st_lsm6dsx_get_event_id(enum iio_event_type type)
switch (type) {
case IIO_EV_TYPE_THRESH:
return ST_LSM6DSX_EVENT_WAKEUP;
case IIO_EV_TYPE_GESTURE:
return ST_LSM6DSX_EVENT_TAP;
default:
return ST_LSM6DSX_EVENT_MAX;
}
@ -2610,6 +2660,9 @@ static bool st_lsm6dsx_report_motion_event(struct st_lsm6dsx_hw *hw)
events_found = st_lsm6dsx_report_events(hw, ST_LSM6DSX_EVENT_WAKEUP,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_EITHER);
events_found |= st_lsm6dsx_report_events(hw, ST_LSM6DSX_EVENT_TAP,
IIO_EV_TYPE_GESTURE,
IIO_EV_DIR_SINGLETAP);
return events_found;
}