[PATCH v6 0/6] iio: pressure: dps310: FIFO and triggered buffer support

[Rupesh Majhi <zoone.rupert@gmail.com>]

dps310 has no buffer support today. This series adds it, hardware FIFO
when no external trigger is attached, FIFO left disabled in favor of the
trigger when one is.

Patch 1 fixes CFG_REG bit definitions. It replaces the standalone fix I
sent 27 July, which Jonathan asked to fold in here instead:

  Link: https://lore.kernel.org/linux-iio/20260728223009.0cb86996@jic23-huawei/

FIFO_EN is needed by patch 5.

Patches 2 and 3 are precursors Jonathan asked for on v5, so the buffer
patches carry only buffer work. Patch 4 adds the triggered buffer, patch
5 the FIFO and selection between the two. Patch 6 turns on clang context
analysis for this driver, so the lock markings are checked and not just
documented. It is last, drop it if IIO would rather not opt in yet.

Tested on an Infineon DPS310 wired to a BeagleBone Black. Lock markings
clean under clang 23.1.0.

Changes since v5:
- split probe device pointer and read path rework into their own patches
- __must_hold() markings instead of comments saying a lock is held, plus
  a last patch opting the driver into the analysis that checks them
- get_unaligned_be24() for the 24 bit results
- scan is a structure now, not a byte buffer with memcpys
- timestamp taken in the trigger handler, not iio_pollfunc_store_time,
  which works with nested triggers too
- plain mutex_lock() where the guard hurt readability
- clamp() instead of clamp_t()
- commit messages cut down, Assisted-by tags added

Rupesh Majhi (6):
  iio: pressure: dps310: fix CFG_REG bit definitions
  iio: pressure: dps310: use a local device pointer in probe
  iio: pressure: dps310: rework the raw read paths
  iio: pressure: dps310: add triggered buffer support
  iio: pressure: dps310: add hardware FIFO support
  iio: pressure: dps310: check the lock markings with context analysis

 drivers/iio/pressure/Kconfig  |   2 +
 drivers/iio/pressure/Makefile |   2 +
 drivers/iio/pressure/dps310.c | 738 ++++++++++++++++++++++++++++++----
 3 files changed, 654 insertions(+), 88 deletions(-)

-- 
2.43.0