[PATCH v3 0/3] imu: st_lsm6dsx: Add support for rotation sensor

[Francesco Lavra <flavra@baylibre.com>]

This series adds support for the rotation sensor functionality present in
some chips from the ST LSM6DSX IMU family.
The second commit is a fix to a previous commit of mine [*] which made it
to 6.19-rcX; the fix technically changes userspace, but this should be OK
as long as it goes in during this release cycle.
Tested on LSM6DSV16X.

Changes from v2 [2]:
- amended description of patch 2 to point out that there are no supported
  gyro events (Jonathan)
- removed superfluous parentheses in st_lsm6dsx_fifo_setup (Lorenzo)
- added Lorenzo's acked-by tag to patch 3
- added missing checks of st_lsm6dsx_sf_set_page() return value (Jonathan)
- added comment in st_lsm6dsx_sf_write_raw (Jonathan)

Changes from v1 [1]:
- swapped patches 1 and 2 (Jonathan)
- miscellaneous stylistic changes (Andy)
- fixed usage of MICRO and MILLI constants in st_lsm6dsx_sf_read_raw and
  st_lsm6dsx_sf_write_raw (Andy)
- replaced scnprintf() with sysfs_emit_at() in
  st_lsm6dsx_sf_sampling_freq_avail (Andy)
- replaced scnprintf() with snprintf() in st_lsm6dsx_sf_probe (Andy)
- clarified in a comment in st_lsm6dsx_set_fifo_odr() that only internal
  sensors have a FIFO ODR configuration register (Jonathan)
- modified patch 3 description to explain justification for the extra IIO
  device (Jonathan)
- moved page lock from st_lsm6dsx_sf_set_page() to the callers (Jonathan)
- s/magnetometer/gyroscope/ in patch 2 description

[*] https://lore.kernel.org/linux-iio/20251017164255.1251060-3-flavra@baylibre.com/
[1] https://lore.kernel.org/linux-iio/20260109181528.154127-1-flavra@baylibre.com/T/
[2] https://lore.kernel.org/linux-iio/20260115122431.1014630-1-flavra@baylibre.com/T/

Francesco Lavra (3):
  iio: imu: st_lsm6dsx: set FIFO ODR for accelerometer and gyroscope
    only
  iio: imu: st_lsm6dsx: set buffer sampling frequency for accelerometer
    only
  iio: imu: st_lsm6dsx: add support for rotation sensor

 drivers/iio/imu/st_lsm6dsx/Makefile           |   2 +-
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h       |  26 ++-
 .../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c    |  29 ++-
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c  |  58 +++++
 .../iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c    | 220 ++++++++++++++++++
 5 files changed, 328 insertions(+), 7 deletions(-)
 create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_fusion.c

-- 
2.39.5