iio: events: make IIO_EVENT_CODE macro private

Make IIO_EVENT_CODE "private" by adding a leading underscore.

There are no more users of this macro in the kernel so we can make it
"private" and enco

iio: events: make IIO_EVENT_CODE macro private

Make IIO_EVENT_CODE "private" by adding a leading underscore.

There are no more users of this macro in the kernel so we can make it
"private" and encourage developers to use the specialized versions of
the macro instead.

Signed-off-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

iio: events.h: add event identifier macros for differential channel

Currently, there are 3 helper macros in iio/events.h to create event
identifiers:
- IIO_EVENT_CODE : create generic event identifi

iio: events.h: add event identifier macros for differential channel

Currently, there are 3 helper macros in iio/events.h to create event
identifiers:
- IIO_EVENT_CODE : create generic event identifier for differential and non
differential channels
- IIO_MOD_EVENT_CODE : create event identifier for modified (non
differential) channels
- IIO_UNMOD_EVENT_CODE : create event identifier for unmodified (non
differential) channels

For differential channels, drivers are expected to use IIO_EVENT_CODE.
However, only one driver in drivers/iio currently uses it correctly,
leading to inconsistent event identifiers for differential channels that
don’t match the intended attributes (such as max1363.c that supports
differential channels, but only uses IIO_UNMOD_EVENT_CODE).

To prevent such issues in future drivers, a new helper macro,
IIO_DIFF_EVENT_CODE, is introduced to specifically create event identifiers
for differential channels. Only one helper is needed for differential
channels since they cannot have modifiers.

Additionally, the descriptions for IIO_MOD_EVENT_CODE and
IIO_UNMOD_EVENT_CODE have been updated to clarify that they are intended
for non-differential channels,

Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20241028-iio-add-macro-for-even-identifier-for-differential-channels-v1-1-b452c90f7ea6@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

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

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

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

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 <[email protected]>
Reviewed-by: Enrico Weigelt <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

iio: Export userspace IIO headers

After UAPI header file split [1] all user-kernel interfaces were
placed under include/uapi/.

This patch moves IIO user specific API from:
* include/linux/iio/even

iio: Export userspace IIO headers

After UAPI header file split [1] all user-kernel interfaces were
placed under include/uapi/.

This patch moves IIO user specific API from:
* include/linux/iio/events.h => include/uapi/linux/iio/events.h
* include/linux/types.h => include/uapi/linux/types.h

Now there is no need for nasty tricks to compile userspace programs
(e.g iio_event_monitor). Just installing the kernel headers with
make headers_install command does the job.

[1] http://lwn.net/Articles/507794/

Signed-off-by: Daniel Baluta <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask

The direction field is set on 7 bits, thus we need to AND it with 0111 111 mask
in order to retrieve it, that is 0x7F, not 0xCF as it is now.

Fixes: ade

iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask

The direction field is set on 7 bits, thus we need to AND it with 0111 111 mask
in order to retrieve it, that is 0x7F, not 0xCF as it is now.

Fixes: ade7ef7ba (staging:iio: Differential channel handling)
Signed-off-by: Cristina Ciocan <[email protected]>
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

iio: Remove support for the legacy event config interface

Now that all drivers have been converted to the new event config interface we
can remove for the legacy event config interface. Also drop th

iio: Remove support for the legacy event config interface

Now that all drivers have been converted to the new event config interface we
can remove for the legacy event config interface. Also drop the '_new' suffix
for the event config interface callbacks, since those are the only callbacks
now.

Signed-off-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

iio: Extend the event config interface

The event configuration interface of the IIO framework has not been getting the
same attention as other parts. As a result it has not seen the same improvement

iio: Extend the event config interface

The event configuration interface of the IIO framework has not been getting the
same attention as other parts. As a result it has not seen the same improvements
as e.g. the channel interface has seen with the introduction of the channel spec
struct. Currently all the event config callbacks take a u64 (the so called event
code) to pass all the different information about for which event the callback
is invoked. The callback function then has to extract the information it is
interested in using some macros with rather long names. Most information encoded
in the event code comes straight from the iio_chan_spec struct the event was
registered for. Since we always have a handle to the channel spec when we call
the event callbacks the first step is to add the channel spec as a parameter to
the event callbacks. The two remaining things encoded in the event code are the
type and direction of the event. Instead of passing them in one parameter, add
one parameter for each of them and remove the eventcode from the event
callbacks. The patch also adds a new iio_event_info parameter to the
{read,write}_event_value callbacks. This makes it possible, similar to the
iio_chan_info_enum for channels, to specify additional properties other than
just the value for an event. Furthermore the new interface will allow to
register shared events. This is e.g. useful if a device allows configuring a
threshold event, but the threshold setting is the same for all channels.

To implement this the patch adds a new iio_event_spec struct which is similar to
the iio_chan_spec struct. It as two field to specify the type and the direction
of the event. Furthermore it has a mask field for each one of the different
iio_shared_by types. These mask fields holds which kind of attributes should be
registered for the event. Creation of the attributes follows the same rules as
the for the channel attributes. E.g. for the separate_mask there will be a
attribute for each channel with this event, for the shared_by_type there will
only be one attribute per channel type. The iio_chan_spec struct gets two new
fields, 'event_spec' and 'num_event_specs', which is used to specify which the
events for this channel. These two fields are going to replace the channel's
event_mask field.

For now both the old and the new event config interface coexist, but over the
few patches all drivers will be converted from the old to the new interface.
Once that is done all code for supporting the old interface will be removed.

Signed-off-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

show more ...

iio: iio/events.h typos

Signed-off-by: Peter Meerwald <[email protected]>
Acked-by: Jonathan Cameron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

IIO: Move core headers to include/linux/iio

Step 1 in moving the IIO core out of staging.

Signed-off-by: Jonathan Cameron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundatio

IIO: Move core headers to include/linux/iio

Step 1 in moving the IIO core out of staging.

Signed-off-by: Jonathan Cameron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...