linux.git/include/linux/iio/types.h, branch v6.1

iio: Add new event type gesture and use direction for single and double tap

2022-09-05T17:08:42+00:00

Add new event type for tap called gesture and the direction can be used
to differentiate single and double tap. This may be used by accelerometer
sensors to express single and double tap events. For directional tap,
modifiers like IIO_MOD_(X/Y/Z) can be used along with singletap and
doubletap direction.

Signed-off-by: Jagath Jog J 
Link: https://lore.kernel.org/r/20220831063117.4141-2-jagathjog1996@gmail.com
Signed-off-by: Jonathan Cameron

iio: core: Introduce _zeropoint for differential channels

2022-08-15T21:30:01+00:00

Address an ABI gap for device where the offset of both lines in a
differential pair may be controlled so as to allow a wider range of
inputs, but without having any direct effect of the differential
measurement.

_offset cannot be used as to remain in line with existing usage,
userspace would be expected to apply it as (_raw + _offset) * _scale
whereas _zeropoint is not. i.e. If we were computing the differential
in software it would be.
((postive_raw + _zeropoint) - (negative_raw + zeropoint) + _offset) * _scale
= ((postive_raw - negative_raw) + _offset) * _scale
= (differential_raw + _offset) * _scale

Similarly calibbias is expected to tweak the measurement seen, not
the adjust the two lines of the differential pair.

Needed for in_capacitanceX-capacitanceY_zeropoint for the
AD7746 CDC driver.

Signed-off-by: Jonathan Cameron 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20220626122938.582107-12-jic23@kernel.org

iio: core: Introduce IIO_VAL_INT_64.

2021-11-17T17:51:34+00:00

Introduce IIO_VAL_INT_64 to read 64-bit value for
channel attribute. Val is used as lower 32 bits.

Signed-off-by: Andriy Tryshnivskyy 
Link: https://lore.kernel.org/r/20211024091627.28031-2-andriy.tryshnivskyy@opensynergy.com
Signed-off-by: Jonathan Cameron

iio:event: Add timeout event info type

2021-04-07T07:36:36+00:00

For adaptive threshold events, the current value is compared with a
(typically) low pass filtered version of the same signal that slowly
tracks large scale changes.  However, sometimes a step change can
result in a large lag before the low pass filtered version begins
to track the signal again.  Timeouts can be used to made an
instantaneous 'correction'.  Documentation of this attribute
is added in a later patch.

Signed-off-by: Jonathan Cameron 
Reviewed-by: Alexandru Ardelean 
Link: https://lore.kernel.org/r/20210314181511.531414-11-jic23@kernel.org

iio: Add relative sensitivity support

2021-03-11T20:47:09+00:00

Some hid sensors may use relative sensitivity such as als sensor.
This patch adds relative sensitivity checking for all hid sensors.

Signed-off-by: Ye Xiang 
Acked-by: Jiri Kosina 
Link: https://lore.kernel.org/r/20210207070048.23935-2-xiang.ye@intel.com
Signed-off-by: Jonathan Cameron

iio: temperature: mlx90632: Interface to change object ambient temperature

2020-09-13T09:21:37+00:00

Since object temperature might be different than the sensor temperature
the infrared sensors should provide an interface to inject ambient
temperature. This was in past done via write to ambient temperature
interface (in_temp_ambient_raw), but I think most people did not know
about it. This solution introduces a new iio type of the CALIBAMBIENT
which is hopefully more descriptive and more explicit about the purpose
and capabilities of the sensors.

Signed-off-by: Crt Mori 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20200906210231.383976-1-cmo@melexis.com
Signed-off-by: Jonathan Cameron

iio: core: add thermocouple_type standard attribute

2019-11-23T12:35:19+00:00

We have a couple of thermocouple IIO drivers, supporting several chips.
Some of them support only one specific thermocouple type (e.g. "K", "J"),
one of them can be configured to work with several different thermocouple
types.

In certain applications thermocouples could be externally connected to the
chip by the user.

This patch introduces a new IIO standard attribute to report the supported
thermocouple type and, where applicable, to allow it to be dynamically set
using sysfs.

Cc: Hartmut Knaack 
Cc: Lars-Peter Clausen 
Cc: Peter Meerwald-Stadler 
Cc: Colin Ian King 
Cc: Patrick Havelange 
Cc: Matt Weber 
Cc: Matt Ranostay 
Cc: Chuhong Yuan 
Cc: Daniel Gomez 
Cc: linux-iio@vger.kernel.org
Signed-off-by: Andrea Merello 
Signed-off-by: Jonathan Cameron

iio: core: add char type for sysfs attributes

2019-11-23T12:33:07+00:00

This patch introduces IIO_VAL_CHAR type for standard IIO attributes to
allow for attributes that needs to be represented by character rather
than a number. This is preparatory for introducing a new attribute whose
purpose is to describe thermocouple type, that can be i.e. "J", "K", etc..

The char-type value is stored in the first "value" integer that is passed
to the .[read/write]_raw() callbacks.

Note that in order to make it possible for the IIO core to correctly parse
this type (actually, to avoid integer parsing), it became mandatory for
any driver that wish to use IIO_VAL_CHAR on a writable attribute to
implement .write_raw_get_fmt().

Cc: Hartmut Knaack 
Cc: Lars-Peter Clausen 
Cc: Peter Meerwald-Stadler 
Cc: Colin Ian King 
Cc: Patrick Havelange 
Cc: Matt Weber 
Cc: Matt Ranostay 
Cc: Chuhong Yuan 
Cc: Daniel Gomez 
Cc: linux-iio@vger.kernel.org
Signed-off-by: Andrea Merello 
Signed-off-by: Jonathan Cameron

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

IIO: inkern: API for manipulating channel attributes

2018-01-10T10:30:08+00:00

Extend the inkern API with functions for reading and writing
attribute of iio channels.

Signed-off-by: Arnaud Pouliquen 
Reviewed-by: Jonathan Cameron 
Signed-off-by: Mark Brown