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: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds gyroscope iio driver which uses sensorhub as data
provider.
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds accelerometer iio driver which uses sensorhub as data
provider.
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds common library for sensorhub iio drivers.
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add sensorhub bindings for sensorhub on Galaxy Gear 2.
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Sensorhub  is MCU dedicated to collect data and manage several sensors.
Sensorhub is a spi device which provides a layer for IIO devices. It provides
some data parsing and common mechanism for sensorhub sensors.

Adds common sensorhub library for sensorhub driver and iio drivers
which uses sensorhub MCU to communicate with sensors.
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This commit adds support for Cosmic Circuits 10001 10-bit ADC device.
Reviewed-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NPhani Movva <Phani.Movva@imgtec.com>
Signed-off-by: NNaidu Tellapati <Naidu.Tellapati@imgtec.com>
[ezequiel: code style cleaning]
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The voltage ADC is peripheral of Qualcomm SPMI PMIC chips. It has
15bits resolution and register space inside PMIC accessible across
SPMI bus.

The vadc driver registers itself through IIO interface.
Signed-off-by: NStanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Document DT binding for Qualcomm SPMI PMIC voltage ADC
driver.
Signed-off-by: NStanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Added AK8963 in the id table. Unfortunately some commercial devices
using caps version ak8963.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch use the devres API for requesting an IRQ.
Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Freescale has the MMA955xL family of devices that use the
same communication protocol (based on i2c messages):
http://www.freescale.com/files/sensors/doc/data_sheet/MMA955xL.pdf.

To support more devices from this family, we need to split the
mma9551 driver so we can export the common functions that will
be used by other mma955x drivers.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Reviewed-by: NVlad Dogaru <vlad.dogaru@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add support for runtime pm to reduce the power consumed by the device
when not used.

If CONFIG_PM is not enabled, the device will be powered on at
init and only powered off on system suspend.

If CONFIG_PM is enabled, runtime pm autosuspend is used:
- for raw reads will keep the device on for a specified time
- for events it will keep the device on as long as we have at least
one event active
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Reviewed-by: NVlad Dogaru <vlad.dogaru@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

By introducing IIO_EV_TYPE_CHANGE, IIO_EV_TYPE_INSTANCE becomes redundant.
The effect of IIO_EV_TYPE_INSTANCE can be obtained by using IIO_EV_TYPE_CHANGE
with IIO_EV_INFO_VALUE set to 1.

Remove all instances of IIO_EV_TYPE_INSTANCE and replace them with
IIO_EV_TYPE_CHANGE where needed.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

A step detector will generate an interrupt each time N step are detected.
A device that has such pedometer functionality is Freescale's MMA9553L:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf.

Introduce IIO_EV_TYPE_CHANGE event type for events that are generated
when the channel passes a threshold on the absolute change in value.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

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: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some devices export the current speed value of the user.

One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the speed of the user based on the number of steps and
stride length.

Introduce a new channel type VELOCITY and a modifier for the magniture or
norm of the velocity vector, IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some devices export an estimation of the distance the user has covered
since the last reset.

One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the distance based on the stride length and step rate.

Introduce a new channel type DISTANCE to export these values.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Human activity sensors report the energy burnt by the user.
One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the number of calories based on weight and step rate.

Introduce a new channel type ENERGY to export these values.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Switch from the legacy suspend/resume callbacks to device pm ops.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

CM3232 is an advanced ambient light sensor with I2C protocol interface.
The I2C slave address is internally hardwired as 0x10 (7-bit).  Writing
to configure register is byte mode, but reading ALS register requests to
use word mode for 16-bit resolution.
Signed-off-by: NKevin Tsai <ktsai@capellamicro.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use common hid sensor iio pm functions. Also the poll time read and
wait is part of power up function of hid sensor iio pm function, so
remove from the client drivers.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

To improvement power and performance, both regular and run time callbacks
are introduced. Because of auto suspend delay, two consecutive read
don't have to go through full power on/off procedure. The auto suspend
time can be adjusted using regular power attributes of PM sysfs.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixed the following warnings (reported by cppcheck):
[drivers/staging/iio/light/tsl2x7x_core.c:1150]: (warning) %d in format string (no. 1)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/light/tsl2x7x_core.c:1150]: (warning) %d in format string (no. 2)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/light/tsl2x7x_core.c:1150]: (warning) %d in format string (no. 3)
requires 'int' but the argument type is 'unsigned int'.
Signed-off-by: NAsaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixed the following warnings (reported by cppcheck):
[drivers/staging/iio/impedance-analyzer/ad5933.c:363]: (warning) %d in format string (no. 1)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/impedance-analyzer/ad5933.c:367]: (warning) %d in format string (no. 1)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/impedance-analyzer/ad5933.c:367]: (warning) %d in format string (no. 2)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/impedance-analyzer/ad5933.c:367]: (warning) %d in format string (no. 3)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/impedance-analyzer/ad5933.c:367]: (warning) %d in format string (no. 4)
requires 'int' but the argument type is 'unsigned int'.
Signed-off-by: NAsaf Vertz <asaf.vertz@tandemg.com>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixed the following warnings (reported by cppcheck):
[drivers/staging/iio/light/tsl2583.c:695]: (warning) %d in format string (no. 1)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/light/tsl2583.c:695]: (warning) %d in format string (no. 2)
requires 'int' but the argument type is 'unsigned int'.
[drivers/staging/iio/light/tsl2583.c:695]: (warning) %d in format string (no. 3)
requires 'int' but the argument type is 'unsigned int'.
Signed-off-by: NAsaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Reviewed-by: NAndrew Bresticker <abrestic@chromium.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add the devicetree binding document for Cosmic Circuits 10001 ADC device.
Reviewed-by: NAndrew Bresticker <abrestic@chromium.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NPhani Movva <Phani.Movva@imgtec.com>
Signed-off-by: NNaidu Tellapati <Naidu.Tellapati@imgtec.com>
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NRoberta Dobrescu <roberta.dobrescu@gmail.com>
Reviewed-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NRoberta Dobrescu <roberta.dobrescu@gmail.com>
Reviewed-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NRoberta Dobrescu <roberta.dobrescu@gmail.com>
Reviewed-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

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: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NKarol Wrona <k.wrona@samsung.com>
Reviewed-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>