[PATCH v4 0/9] st_lsm6dsx: add tap event detection

[Francesco Lavra <flavra@baylibre.com>]

The bulk of this patch set consists of reworking the existing code for
event detection (which supports IIO_EV_TYPE_THRESH events only) in order to
make it generic to accommodate different event types. Actual support for
tap events is implemented in the last patch.
Tested on LSMDSV16X.

Changes from v3 [3]:
- replaced double negation with single negation in 
  st_lsm6dsx_event_setup() (Andy)

Changes from v2 [2]:
- replaced status_reg and status_mask in struct st_lsm6dsx_event_src with a
  struct st_lsm6dsx_reg field (Lorenzo)
- dropped new local variables in favor of directly using fields of existing
  struct variables (Lorenzo)
- added blank line after return statements (Lorenzo)
- added Andy's Reviewed-by tag to patches 1-6,8-9
- added Lorenzo's Acked-by tag to patches 1-3,6,9

Changes from v1 [1]:
- added Fixes tag to patch 1/9 (Andy, Lorenzo)
- added st_lsm6dsx_field_get() temporary macro, to be removed once the
  generic FIELD_GET() macro lands (Andy)
- refactored st_lsm6dsx_write_event_config() with the addition of two
  helper functions st_lsm6dsx_check_other_events() and
  st_lsm6dsx_events_enable() (Andy)
- replaced dynamic allocation of iio_chan_spec and iio_event_spec arrays
  with the addition of new static arrays (Jonathan)
- changed line wrapping to 80 characters (Lorenzo, Andy)
- changed line wrapping for commit messages to 75 characters (Jonathan)
- added comments to st_lsm6dsx_event_setup() and st_lsm6dsx_get_event_reg()
  (Andy)
- miscellaneous stylistic changes (Andy)

[1] https://lore.kernel.org/linux-iio/20251030072752.349633-1-flavra@baylibre.com/T/
[2] https://lore.kernel.org/linux-iio/20251120082615.3263892-1-flavra@baylibre.com/T/
[3] https://lore.kernel.org/linux-iio/20251125202307.4033346-1-flavra@baylibre.com/T/

Francesco Lavra (9):
  iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event
    detection
  iio: imu: st_lsm6dsx: make event_settings more generic
  iio: imu: st_lsm6dsx: move wakeup event enable mask to event_src
  iio: imu: st_lsm6dsx: rework code to check for enabled events
  iio: imu: st_lsm6dsx: remove event_threshold field from hw struct
  iio: imu: st_lsm6dsx: make event management functions generic
  iio: imu: st_lsm6dsx: add event configurability on a per axis basis
  iio: imu: st_lsm6dsx: add event spec parameter to iio_chan_spec
    initializer
  iio: imu: st_lsm6dsx: add tap event detection

 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h      |  56 +-
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 538 +++++++++++++------
 2 files changed, 395 insertions(+), 199 deletions(-)

-- 
2.39.5