linux-stable.git/include/linux/iio/iio.h, branch linux-4.0.y

iio: core: Introduce IIO_CHAN_INFO_DEBOUNCE_COUNT and _TIME

2015-01-29T18:49:57+00:00

The pedometer needs to filter out false steps that might be generated by
tapping the foot, sitting, etc. To do that it computes the number of
steps that occur in a given time and decides the user is moving only
if this value is over a threshold. E.g.: the user starts moving only
if he takes 4 steps in 3 seconds. This filter is applied only when
the user starts moving.

A device that has such pedometer functionality is Freescale's MMA9553L:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf.

To export this feature, this patch introduces IIO_CHAN_INFO_DEBOUNCE_COUNT
and IIO_CHAN_INFO_DEBOUNCE_TIME. For the pedometer, in_steps_debounce_count
will specify the number of steps that need to occur in
in_steps_debounce_time seconds so that the pedometer decides the user is
moving.

Signed-off-by: Irina Tirdea 
Signed-off-by: Jonathan Cameron

iio: core: Introduce IIO_CHAN_INFO_CALIBWEIGHT

2015-01-27T18:49:54+00:00

Some devices need the weight of the user to compute other
parameters. One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that needs the weight of the user to compute the number of calories burnt.

Signed-off-by: Irina Tirdea 
Signed-off-by: Jonathan Cameron

iio: Add new operating mode for non triggered sw buffers

2015-01-25T22:53:38+00:00

There was a need for non triggered software buffer type.  It can be used when
triggered model does not fit and INDIO_BUFFER_HARDWARE causes confusion because
the data stream can be obtained not directly form hardware backend.

Suggested-by: Jonathan Cameron 
Signed-off-by: Karol Wrona 
Reviewed-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: core: Introduce IIO_CHAN_INFO_CALIBHEIGHT

2014-11-22T11:05:56+00:00

Some devices need the height of the user to compute various
parameters. One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that needs the height of the user to compute the stride length which
is used further to determine distance, speed and activity type.

Signed-off-by: Irina Tirdea 
Signed-off-by: Daniel Baluta 
Signed-off-by: Jonathan Cameron

iio: core: Introduce STEPS channel, ENABLE mask and INSTANCE event

2014-11-22T11:05:51+00:00

These changes are needed to support the functionality of a pedometer.
A pedometer has two basic functionalities: step counter and step detector.

The step counter needs to be enabled and then it will count the steps
in its hardware register. Whenever the application needs to check
the step count, it will read the step counter register. To support the
step counter a new channel type STEPS is added. Since the pedometer needs
to be enabled first so that the hardware can count and store the steps,
we need a specific ENABLE channel info mask.

The step detector will generate an interrupt each time a step is detected.
To support this functionality we add a new event type INSTANCE.

For more information on the Android requirements for step counter and step
detector see:
http://source.android.com/devices/sensors/composite_sensors.html#counter
and http://source.android.com/devices/sensors/composite_sensors.html#detector.

A device that has the pedometer functionality this interface needs to
support is Freescale's MMA9553L:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf

Signed-off-by: Irina Tirdea 
Signed-off-by: Daniel Baluta 
Signed-off-by: Jonathan Cameron

iio: inkern: Add of_xlate function to struct iio_info

2014-10-25T10:03:40+00:00

When #iio-cells is greater than '0', the driver could provide
a custom of_xlate function that reads the *args* and returns
the appropriate index in registered IIO channels array.

Add simple translation function, suitable for the most 1:1
mapped channels in IIO chips, and use it when driver did not
provide custom implementation.

Signed-off-by: Ivan T. Ivanov 
Reviewed-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Use ktime_get_real_ns()

2014-07-23T22:01:45+00:00

No idea why iio needs wall clock based time stamps, but we can avoid
the timespec conversion dance by using the new interfaces.

Signed-off-by: Thomas Gleixner 
Acked-by: Jonathan Cameron 
Signed-off-by: John Stultz

IIO: core: Modify scan element type

2014-04-29T21:07:11+00:00

The current scan element type uses the following format:
  [be|le]:[s|u]bits/storagebits[>>shift].
To specify multiple elements in this type, added a repeat value.
So new format is:
  [be|le]:[s|u]bits/storagebitsXr[>>shift].
Here r is specifying how may times, real/storage bits are repeating.

When X is value is 0 or 1, then repeat value is not used in the format,
and it will be same as existing format.

Signed-off-by: Srinivas Pandruvada 
Signed-off-by: Jonathan Cameron

IIO: core: Introduce read_raw_multi

2014-04-29T21:05:32+00:00

This callback is introduced to overcome some limitations of existing
read_raw callback. The functionality of both existing read_raw and
read_raw_multi is similar, both are used to request values from the
device. The current read_raw callback allows only two return values.
The new read_raw_multi allows returning multiple values. Instead of
passing just address of val and val2, it passes length and pointer
to values. Depending on the type and length of passed buffer, iio
client drivers can return multiple values.

Signed-off-by: Srinivas Pandruvada 
Signed-off-by: Jonathan Cameron

iio:drop IIO_ST macro

2014-02-15T10:58:17+00:00

This macro no longer allows all the elements of the scan_type structure
to be set.  Missinterpretation of the parameters also caused a couple of
recent bugs.  No mainline drivers now use this macro so drop it.

Signed-off-by: Jonathan Cameron