[PATCH v3 0/3] iio: flow: Sensirion SLF3S liquid flow sensor

[Wadim Mueller]

Hi all,

v3 addresses the per-patch review feedback from Jonathan (driver +
cover, https://lore.kernel.org/linux-iio/20260528124413.6c91e1bb@jic23-huawei/)
and Krzysztof (dt-binding,
https://lore.kernel.org/linux-iio/20260528-transparent-adventurous-python-af8f69@quoll/).
As requested this is sent as a fresh thread, not in-reply-to v2.

The IIO_VOLUMEFLOW patch (1/3) is unchanged from v2.

Changes since v2:

  * dt-bindings: drop the generic-only "sensirion,slf3s" compatible;
    the per-variant compatibles stay (-0600F, -1300F, -4000B)
  * dt-bindings: drop the optional interrupts property -- the driver
    is polled-only and the binding should not advertise something we
    do not consume
  * dt-bindings: drop the sensirion,medium property and move medium
    selection to the IIO sysfs in_volumeflow_medium ext_info enum;
    the sensor starts in water mode after probe and IPA is selected
    at runtime via that attribute
  * dt-bindings: MAINTAINERS no longer claims drivers/iio/flow/
  * driver: includes cleaned up per IWYU (drop property.h since no
    DT property is read any more, add array_size.h / dev_printk.h /
    device.h / errno.h / types.h / units.h)
  * driver: drop the SLF3S_MEAS_LEN define in favour of ARRAY_SIZE()
  * driver: inline SLF3S_TEMP_SCALE_MILLIC at the call site with a
    short comment that explains the 1000/200 ratio
  * driver: use 600 * MICRO / 30 * MICRO / 1920 * MILLI from
    linux/units.h for the per-variant scale denominators
  * driver: slf3s_send_cmd() takes cmd[at_least 2] (kernel idiom)
    rather than cmd[static 2]
  * driver: detection wins over the DT-supplied compatible; a
    mismatch is reported with dev_info and the sensor-reported
    variant is used
  * driver: SLF3S_MEAS_START_DELAY_US bumped to 60 ms (datasheet
    section 2.2, tw) and a 25 ms tPU power-up delay is observed
    between regulator enable and the first I2C command
  * driver: blank line before plain return statements; minor reflow
    to 80 columns
  * commit messages: drop the manual Cc trailers (get_maintainer.pl
    handles those) and move Signed-off-by to the end of the trailer
    block

Patches:

  1/3  iio: types: add IIO_VOLUMEFLOW channel type (unchanged)
  2/3  dt-bindings: iio: flow: add Sensirion SLF3S binding
  3/3  iio: flow: add Sensirion SLF3S liquid flow sensor driver

Tested with an SLF3S-0600F on a TI AM64x platform; W=1 build clean,
checkpatch --strict clean, dt_binding_check clean.

Thanks,
Wadim

Wadim Mueller (3):
  iio: types: add IIO_VOLUMEFLOW channel type
  dt-bindings: iio: flow: add Sensirion SLF3S liquid flow sensor
  iio: flow: add Sensirion SLF3S liquid flow sensor driver

 Documentation/ABI/testing/sysfs-bus-iio       |  11 +
 .../bindings/iio/flow/sensirion,slf3s.yaml    |  49 +++
 MAINTAINERS                                   |   8 +
 drivers/iio/Kconfig                           |   1 +
 drivers/iio/Makefile                          |   1 +
 drivers/iio/flow/Kconfig                      |  27 ++
 drivers/iio/flow/Makefile                     |   7 +
 drivers/iio/flow/slf3s.c                      | 406 ++++++++++++++++++
 drivers/iio/industrialio-core.c               |   1 +
 include/uapi/linux/iio/types.h                |   1 +
 tools/iio/iio_event_monitor.c                 |   2 +
 11 files changed, 514 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/flow/sensirion,slf3s.yaml
 create mode 100644 drivers/iio/flow/Kconfig
 create mode 100644 drivers/iio/flow/Makefile
 create mode 100644 drivers/iio/flow/slf3s.c

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2.52.0