linux-toradex.git/include/linux/iio, branch v3.14.26

iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask

2014-12-06T23:55:36+00:00

commit ccf54555da9a5e91e454b909ca6a5303c7d6b910 upstream.

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 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio:trigger: modify return value for iio_trigger_get

2014-10-05T21:52:17+00:00

commit f153566570fb9e32c2f59182883f4f66048788fb upstream.

Instead of a void function, return the trigger pointer.

Whilst not in of itself a fix, this makes the following set of
7 fixes cleaner than they would otherwise be.

Signed-off-by: Srinivas Pandruvada 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: Remove support for the legacy event config interface

2013-12-08T13:13:52+00:00

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 
Signed-off-by: Jonathan Cameron

iio: Add support for humidity sensors

2013-12-03T20:22:29+00:00

There are already humidity sensors in the hwmon subsystem,
so we use their unit (milli percent) here as well.

Signed-off-by: Harald Geyer 
Signed-off-by: Jonathan Cameron

iio: Add data_available callback for buffers

2013-12-03T20:22:28+00:00

This patch adds a new data_available() callback to the iio_buffer_access_funcs
struct. The callback is used to indicate whether data is available in the buffer
for reading. It is meant to replace the stufftoread flag from the iio_buffer
struct. The reasoning for this is that the buffer implementation usually can
determine whether data is available rather easily based on its state, on the
other hand it can be rather tricky to update the stufftoread flag in a race free
way.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: core: Move kernel doc to the right location

2013-11-24T21:07:11+00:00

Documentation related to function should be placed above
its implementation. Move it accordingly.

Signed-off-by: Sachin Kamat 
Cc: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: core: Implement devm_iio_device_{register,unregister}

2013-11-24T21:07:09+00:00

Add device managed devm_iio_device_{register,unregister}()
to automatically unregister IIO drivers thus leading to
simplified IIO driver code.

Signed-off-by: Sachin Kamat 
Cc: Lars-Peter Clausen 
Tested-by: Lars-Peter Clausen 
Reviewed-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Remove unused iio_sw_buffer_preenable()

2013-10-16T18:17:06+00:00

The functionality implemented by iio_sw_buffer_preenable() is now done directly
in the IIO core and previous users of iio_sw_buffer_preenable() have all been
updated to not use it anymore. It is unused now and can be remove.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Add a hysteresis event info attribute

2013-10-12T11:51:35+00:00

For some devices it is possible to configure a hysteresis for threshold (or
similar) events. This patch adds a new hysteresis event info type which allows
for easy creation and read/write handling of the sysfs attribute.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Extend the event config interface

2013-10-12T11:32:19+00:00

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 
Signed-off-by: Jonathan Cameron