Add driver for Murata IRS-D200

Murata IRS-D200 is a PIR sensor for human detection. In this series we add devicetree bindings and an IIO driver with support for triggered buffer and events. Link to the datasheet should be added to the devicetree bindings, when that is available.

Changes in v4:

[iio]
* Use iio_trigger_poll_nested() instead of iio_trigger_poll_chained(). (Remnant from old tree... Sorry!)

Link to v3: https://lore.kernel.org/lkml/[email protected]/

Changes in v3:

[dt-bindings]
* Add "Reviewed-by" footer in commit message.

[iio]
* Use __le16 for buffers in regmap_bulk_read/write().
* Use 8 instead of BIT(3) in irsd200_write_nr_count().
* Rename val to tmp in irsd200_write_event_config().
* Return 0 on success in irsd200_write_event_config().
* Return IRQ_HANDLED instead of IRQ_NONE in error paths.
* Return IRQ_NONE when not clearing anything in irsd200_irq_thread().
* Use devm_regulator_get_enable() in probe.

Link to v2: https://lore.kernel.org/lkml/[email protected]/

Changes in v2:

[dt-bindings]
* Remove "bindings for" in commit subject.
* Remove superfluous yaml block style indicator ('|') for description:.
* Change node name in example from pir to proximity.
* Add required vdd-supply property.

[iio]
* Add event enums for running period and count.
* Use set_trigger_state callback instead of iio_buffer_setup_ops's predisable and postenable.
* Use regmap_bulk_read() in irsd200_read_data() and irsd200_read_timer().
* Use regmap_bulk_write() in irsd200_write_timer().
* Remove comment for macro IRS_UPPER_COUNT().
* Move IIO_EV_INFO_LOW/HIGH_PASS_FILTER_3DB from iio_event_spec to iio_chan_spec.
* Ignore timer (IRS_INTR_TIMER) interrupts.
* Clarify comment on ssleep(3) in irsd200_write_data_rate().
* Only check for non-zero return values from regmap functions (as opposed to ret < 0).
* Add macro defines for operation states.
* Remove fix size in static const array declarations.
* Remove unnecessary ret variable in irsd200_write_raw().
* Remove comments in irsd200_event_spec[].
* Remove unnecessary call to i2c_set_clientdata() in probe.
* Use dev_err_probe() everywhere in probe.
* Remove unnecessary braces around if statement in probe.
* Get and enable regulator in probe.

Link to v1: https://lore.kernel.org/lkml/[email protected]/

Waqar Hameed (3):
dt-bindings: iio: proximity: Add Murata IRS-D200
iio: Add event enums for running period and count
iio: Add driver for Murata IRS-D200

 Documentation/ABI/testing/sysfs-bus-iio       |  16 +
 .../iio/proximity/murata,irsd200.yaml         |  60 ++
 drivers/iio/industrialio-event.c              |   2 +
 drivers/iio/proximity/Kconfig                 |  12 +
 drivers/iio/proximity/Makefile                |   1 +
 drivers/iio/proximity/irsd200.c               | 962 ++++++++++++++++++
 include/linux/iio/types.h                     |   2 +
 7 files changed, 1055 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/proximity/murata,irsd200.yaml
 create mode 100644 drivers/iio/proximity/irsd200.c

base-commit: 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c

2.30.2