Merge tag 'iio-for-7.2a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into work-testing

IIO: New device support, features and cleanup for the 7.2 cycle.

Like many areas of the kernel IIO has seen a lot of new contributors
though in this case that is not all AI driven, but also reflects and annual
surge of student contributions from usp.br. We also have several new
regular reviewers who are helping with the surge (thanks to all our
active reviewers!)

Given there was a lot of cases of similar improvements applied to
different drivers, I have grouped those into a special section (various
drivers) to avoid mass duplication.

New device support
------------------

adi,ad4130
- Add support for AD4129-4, AD4129-8, AD4130-4, AD4131-4 and AD4131-8
  after reworking the driver to be suitable for multiple device support.
adi,ad4080
- Support the AD4880 and AD4884 dual-channel parts. Interesting parts
  as have two separate data pipelines (including SPI buses interfaces),
  but the only current backend IP combines the two so they cannot be
  treated as independent devices.
adi,ad5706r
- New driver for this 4 channel current output DAC.
adi,ad4691
- New driver supporting this family of ADCs. Support for AD4691, AD4692,
  AD4693 and AD4694 which support either 8 or 16 channels with different
  max sampling rates. Feature rich driver including SPI offload support.
adi,ltc2983
- Add support for the ADT7604 in which the same sensor die as the
  LTC2984 is used for leak detection (liquid coverage of a sense area).
allwinner,adc
- Support for A523 SoCs. Similar to existing parts but with an additional
  clock.  Includes adding support for non contiguous channel lookup
  for in kernel use (fwnode_xlate callback).
broadcomm,apds9999
- New driver for the APDS9999 Ambient Light, RGB and proximity sensor.
memsic,mmc5983
- New driver for this 3-axis magnetometer.
taos,tsl2772
- Add support for the AVAGO APDS9900 and APDS9901 Ambient Light and
  Proximity sensors. which are very similar to existing part with slightly
  different integration time choices.  Includes removal of driver for these
  parts from drivers/misc.
vishay,veml3328
- New driver for this RGB+IR light sensor.

Features
--------

IIO Core
- Support for IEEE 754 floating point values in buffer scan elements.
- Support quaternion axis representation (missing the scaler part)
microchip,mcp4821
- Add configurable gain control
qcom,pm8xxx-xoadc
- Add per channel labels.
st,lsm6dsx
- Support for rotation sensing on the LSM6DSV and LSM6DSV16X using
  both floating point and new quaterionaxis rotation modifier.

MAINTAINERS update
------------------

IIO top level entry
- Include Documentation/driver-api/iio/
adi,*
- Top level ADI entry maintainer switch from Lars-Peter Clausen to Nuno Sá
  reflecting what has been the reality for some time. Thanks to Lars-Peter
  who was very active for many years, but has moved on to other things.
  Also add the linux@analog.com email list to ensure we don't get a gap
  in future.
- Maintainer updates to reflect Cosmin Tanislav having moved on - thanks
  to Marcelo Schmitt for taking these over.
sensiron,scd30
- Replace maintainer (Tomasz Duszynski) with Maxwell Doose.

Cleanups, minor fixes and hardening.
------------------------------------

Documentation
- Add missing powerdown modes to ABI docs.
- Use modern helpers for buffer definition in the examples.
core
- Rework of the handling of timestamps so that the offset is cached at
  buffer resize time (during enabling) rather than based on assumption
  that relied in the timestamp being last and the largest element and
  so always 8 bytes before end of the scan. Underlying problem was
  triggered by scans with repeated type elements such as quaternions
  with each element more than 2 bytes - Giving a 16 byte+ aligned channel
  with result that a following timestamp may be 16 bytes from end of scan,
  rather than 8. Note that for the bosch,bno55 a compatibility hack means
  that it will duplicate the timestamp putting  a second copy at previously
  incorrect location.
- Tidy up use of kernel types in buffer code to not use int64_t given all
  calls use s64.
various drivers
- Drop unused driver_data in device id tables - includes cleanup of various
  drivers that had only one choice where it can be hard coded elsewhere.
- Move to named initializers for many i2c_device_id and platform_device_id
  tables (I have no idea how we go into habit of using named initializers
  for only a subset of the table types - e.g. of_device_id).
- Make IIO_CHAN_SOFT_TIMESTAMP() macro a compound literal allowing simple
  use in various drivers that do dynamic channel definitions. Use it in
  all such cases.
- Use dev_err_probe() and local dev variables to tidy up older drivers.
- Switch more drivers to devm_mutex_init() to provide minor debug benefits.
- Reorder code to put MODULE_DEVICE_TABLE() next to the tables.
- Lots of use of cleanup.h magic to improve code flow, often including
  related refactors such as introducing helpers.
- Replacement of usleep_range() with fsleep()
- Reduce logging noise where functions either provide their own extensive
  reports on error, or where a clear error code is returned to userspace.
- Minor spelling and style fixes (improving bracket usage, not using
  __packed etc)
hid-sensors-*
- Drop helpers for setting channel bit masks in favor of a compound
  literal at the call site.  Also general cleanup of surrounding code.
hid-sensors-magn
- Use u32 rather than bare unsigned for types.
hid-sensors-rotation
- Make sue of ext_scan_type handling for static case rather than duplicate
  chan_info structures.
adi,ad3552r
- Use field_get() to replace open coded equivalent.
adi,ad4170
- Switch from switch to table lookup for GPIO modes.
adi,ad5686
- Apply IWYU principal to included a consistent set of headers.
- Deduplicate regmaps for AD5684 and AD5693 as identical.
- Switch from an enum value in driver data and array look up to pointers
  to separate structures, improving readabilty and avoiding issues with
  0 value when using helpers to deal with different firmware types.
- Add of_match_id table to SPI driver rather than relying on fallback to
  spi_device_id table.
- Introduce some helpers for powerdown mask control.
- Add helpers for control sync simplifying a couple of corner cases.
- Docs fixes.
- Add an ops structure to simplify future addition of operations beyond
  read and write.
adi,ad7191
- Switch to best practice of using device_property_present() to detect
  if an optional property is there rather than error values on querying
  the property.
adi,ad7280a
- Use local variables to improve readability of breaking up chan-address.
adi,ad7825
- Cleanup a type mismatch in clamp() call.
adi,ad799x
- Include improvements
- Local dev variable to shorten code lines.
- Cache regulator voltage at probe (these never change in practice)
- Convert to devm for all unwind handling.
adi,ad9832
- Improve include relevance including replacing kernel.h with more specific
  headers.
- Simplify some maths.
adi,ad9834
- Improve include relevance including replacing kernel.h with more specific
  headers.
adi,adt7316
- Add a comment to avoid future 'fixes' for error handling during the
  odd sequence used to flip from I2C mode to SPI mode.
adi,adxl*
- Documentation consistency improvements.
asahi-kasei,ak8975
- Fix missing runtime pm calls for buffered capture.
- Fix missing pm_runtime_put_autosuspend() in an error path that would leave
  the device stuck on.
- Close a potential uninitialized kernel stack leak.
- Extensive driver modernization including: header relevance, fsleep()
  various minor bugs, dropping duplicate error messages and avoiding
  magic lengths for buffers.
- Replace opencoded polling with iopoll().
- Add error checking to gpio reads.
avia,hx711
- Move scale computation from global data to per device avoiding problems
  if multiple devices present.
- General binding text cleanup.
bosch,bmg160
- Add missing mount-matrix entry to binding.
bosch,bno55
- Terminate error strings with newlines.
devantech,srf08
- Replace sprintf() with sysfs_emit() and sysfs_emit_at() to make intent
  clearer.
freescale,mma8452
- Add missing return value check.
- Fix potential probe ordering issue by switching to non devm irq request.
linear,ltc2309
- Add chip specific read delays.
- Improve chip_info structure, adding __counted_by_ptr marking and
  reorganizing to improve packing.
linear,ltc2983
- Fix a firmware combination where default n_wires of 2 bypasses exclusion
  of adi,current-rotate whereas explicitly setting it to 2 does not.
- Fix potential race with completion reinit.
- Improve error message wording consistency.
- Use fwnode_property_present() to detect optional properties rather
  than fragile return value checking.
microchip,mcp3422
- Use of GENMASK(), FIELD_GET(), FIELD_PREP() to improve readability and
  generally modernize driver.
microchip,mcp47feb02
- Fix binding example to use a possible I2C address.
- Fix binding bounds on channel number.
- Standardize binding example indentation
nxp,saradc
- Increase chances of recovering from a failure in the interrupt handler
  by notifying the trigger that it can reenable even when the read failed.
- Use field_get() to replace opencoded equivalent.
qualcomm,*
- Standardize on Qualcomm company naming in Kconfig.
richtek,rtq6056
- Add i2c_device_id table for legacy instantiation.
samsung,ssp
- Replace custom timestamp channel macro with main one.
sciosense,ens210
- Now scoped_guard() has been reworked, no need for a return
  that can never be reached.
sensiron,scd30
- Constify command lookup table.
- Sanity check for NULL buffer of non zero size being provided to
  sc30_i2c_command()
sensortek,stk3310
- Include  more appropriate headers.
- Ensure interrupt in appropriate mode after resume.
- Structure definition improvements.
- Use size_of() to replace opencoded sizes.
siliconimage,si1133
- Resolve counter related issues on timeout error paths.
- Unused macro removal, improved macro definitions,.
- Include relevance improvements.
st,lsm6dsx
- Fix an issue with applying invalid data check to wrong type of sample.
taos,tcs3472
- Try to powerdown chip on probe failure.
- Devm usage and dropping of remove() callback.
- Various other minor cleanup.
taos,tsl2591
- Dead code removal.
- Simplify tsl2591_persist functions using a look up table.
ti,ads1298
- Fix wrong comment on timeout (and minor code improvement)
- Drop unnecessary CONFIG2 write during init.
ti,ads7950
- Check ret rather that ret < 0 for spi_setup() call.
- Use fully devm managed resources including moving to
  devm_regulator_get_enable_read_voltage() at probe time rather than
  querying evey time.
- Using spi_optimize_message() to reduce CPU usage.
ti,ads8688
- User read_avail() callback rather than open coding handling of
  available attributes.
ti,opt3001
- Header relevance improvements
- Use GENMASK for field definitions to improve readability.
vishay,vcnl4000
- Switch from enum in device_data to individual names structures
  impmroving code readabililty.
- Move to devm handling for remainder of probe.
vishay,veml6030
- Drop pointless read of current Iteration Time index as it is not used.
xilinx,ams
- Fix potential out of bound channel lookup.
- Replace some large switch statements with table lookups.
yamaha,yas530
- Put label in chip info structure to avoid look up in i2c_device_id table.

Drop
----

iio-trig-interrupt.
- Not used for some time and no support for modern firmware bindings or
  in kernel users. So drop it.

* tag 'iio-for-7.2a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (266 commits)
  iio: adc: nxp-sar-adc: harden buffer ISR against per-channel read failure
  iio: chemical: scd30: Replace manual locking with RAII locking
  iio: light: tsl2591: remove unneeded tsl2591_compatible_als_persist_cycle()
  iio: dac: ad5686: create bus ops struct
  iio: dac: ad5686: cleanup doc header of local structs
  iio: dac: ad5686: add control_sync() for single-channel devices
  iio: dac: ad5686: add helpers to handle powerdown masks
  iio: dac: ad5686: add of_match table to the spi driver
  iio: dac: ad5686: drop enum id
  iio: dac: ad5686: remove redundant register definition
  iio: dac: ad5686: refactor include headers
  iio: adc: ad4080: fix AD4880 chip ID
  iio: light: veml3328: add support for new device
  dt-bindings: iio: light: veml6030: add veml3328
  docs: iio: adc: ad4691: add driver documentation
  iio: adc: ad4691: add oversampling support
  iio: adc: ad4691: add SPI offload support
  iio: adc: ad4691: add triggered buffer support
  iio: adc: ad4691: add initial driver for AD4691 family
  dt-bindings: iio: adc: add AD4691 family
  ...

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