linux.git/Documentation/iio, branch v6.15

Merge tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2025-04-01T18:26:08+00:00

Pull char / misc / IIO driver updates from Greg KH:
 "Here is the big set of char, misc, iio, and other smaller driver
  subsystems for 6.15-rc1. Lots of stuff in here, including:

   - loads of IIO changes and driver updates

   - counter driver updates

   - w1 driver updates

   - faux conversions for some drivers that were abusing the platform
     bus interface

   - coresight driver updates

   - rust miscdevice binding updates based on real-world-use

   - other minor driver updates

  All of these have been in linux-next with no reported issues for quite
  a while"

* tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  samples: rust_misc_device: fix markup in top-level docs
  Coresight: Fix a NULL vs IS_ERR() bug in probe
  misc: lis3lv02d: convert to use faux_device
  tlclk: convert to use faux_device
  regulator: dummy: convert to use the faux device interface
  bus: mhi: host: Fix race between unprepare and queue_buf
  coresight: configfs: Constify struct config_item_type
  doc: iio: ad7380: describe offload support
  iio: ad7380: add support for SPI offload
  iio: light: Add check for array bounds in veml6075_read_int_time_ms
  iio: adc: ti-ads7924 Drop unnecessary function parameters
  staging: iio: ad9834: Use devm_regulator_get_enable()
  staging: iio: ad9832: Use devm_regulator_get_enable()
  iio: gyro: bmg160_spi: add of_match_table
  dt-bindings: iio: adc: Add i.MX94 and i.MX95 support
  iio: adc: ad7768-1: remove unnecessary locking
  Documentation: ABI: add wideband filter type to sysfs-bus-iio
  iio: adc: ad7768-1: set MOSI idle state to prevent accidental reset
  iio: adc: ad7768-1: Fix conversion result sign
  iio: adc: ad7124: Benefit of dev = indio_dev->dev.parent in ad7124_parse_channel_config()
  ...

doc: iio: ad7380: describe offload support

2025-03-11T19:09:17+00:00

Add a section to the ad7380 documentation describing how to use the
driver with SPI offloading.

Signed-off-by: Angelo Dureghello 
Link: https://patch.msgid.link/20250310-wip-bl-spi-offload-ad7380-v4-2-b184b37b7c72@baylibre.com
Signed-off-by: Jonathan Cameron

docs: iio: add AD7191

2025-03-11T19:09:05+00:00

Add documentation for AD7191 driver.

Signed-off-by: Alisa-Dariana Roman 
Reviewed-by: David Lechner
Link: https://patch.msgid.link/20250228141327.262488-4-alisa.roman@analog.com
Signed-off-by: Jonathan Cameron

docs: iio: ad7380: add adaq4381-4

2025-03-04T15:05:50+00:00

adaq4381-4 is the 14 bits version of adaq4380-1 chip. Add it to the
documentation.

Signed-off-by: Julien Stephan 
Reviewed-by: David Lechner 
Link: https://patch.msgid.link/20250226-ad7380-add-adaq4381-4-support-v1-3-f350ab872d37@baylibre.com
Signed-off-by: Jonathan Cameron

Documentation: iio: Add ADC documentation

2025-03-04T13:17:51+00:00

ADC inputs can be classified into a few different types according to how
they measure the input signal, how restrained the signal is, and number of
input pins. Even though datasheets tend to provide many details about their
inputs and measurement procedures, it may not always be clear how to model
those inputs into IIO channels.

For example, some differential ADCs can have their inputs configured into
pseudo-differential channels. In that configuration, only one input
connects to the signal of interest as opposed to using two inputs of a
differential input configuration. Datasheets sometimes also refer to
pseudo-differential inputs as single-ended inputs even though they have
distinct physical configuration and measurement procedure.

Document consolidated ADC input types and how they are usually described
and supported in device tree and IIO, respectively.

Signed-off-by: Marcelo Schmitt 
Reviewed-by: David Lechner 
Link: https://patch.msgid.link/e6ac2a595f06ba2d5ff0eb86e5895479c9dd797f.1739998491.git.marcelo.schmitt@analog.com
Signed-off-by: Jonathan Cameron

docs: iio: fix wrong driver name in documentation

2025-03-04T13:17:51+00:00

The ADXL380/382 documentation uses in one place a wrong driver name.
Adds no functional change.

Signed-off-by: Lothar Rubusch 
Link: https://patch.msgid.link/20250221194658.41358-1-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron

docs: iio: add documentation for adis16550 driver

2025-03-04T13:17:47+00:00

Add documentation for adis16550 driver which describes the driver device
files and shows how the user may use the ABI for various scenarios
(configuration, measurement, etc.).

Co-developed-by: Antoniu Miclaus 
Signed-off-by: Antoniu Miclaus 
Co-developed-by: Ramona Gradinariu 
Signed-off-by: Ramona Gradinariu 
Signed-off-by: Robert Budai 
Link: https://patch.msgid.link/20250217105753.605465-7-robert.budai@analog.com
Signed-off-by: Jonathan Cameron

docs: iio: Allow creating cross-references ABI

2025-02-18T20:42:46+00:00

Now that Documentation/ABI is processed by automarkup, let it
generate cross-references for the corresponding ABI file.

Signed-off-by: Mauro Carvalho Chehab 
Acked-by: Jonathan Cameron 
Signed-off-by: Jonathan Corbet 
Link: https://lore.kernel.org/r/10e7d46360b5e5782d5c09e2706ba47c2315df4f.1739254867.git.mchehab+huawei@kernel.org

docs: iio: ad4030: add documentation

2025-02-16T15:40:51+00:00

This adds a new page to document how to use the ad4030 ADC driver

Signed-off-by: Esteban Blanc 
Link: https://patch.msgid.link/20250214-eblanc-ad4630_v1-v4-6-135dd66cab6a@baylibre.com
Signed-off-by: Jonathan Cameron

doc: iio: ad4695: describe oversampling support

2025-02-11T19:32:31+00:00

Add a section to the ad4695 documentation describing how to use the
oversampling feature. Also add some clarification on how the
oversampling ratio influences effective sample rate in the offload
section.

Signed-off-by: Trevor Gamblin 
Tested-by: David Lechner 
Link: https://patch.msgid.link/20250109-ad4695-oversampling-v2-2-a46ac487082c@baylibre.com
Signed-off-by: Jonathan Cameron