This is a necessary step in taking the buffer implementation
opaque.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
This should make it easier to see how the structure is split into
public and private parts - reflected in the generated documentation.
Deliberately use /* instead of /** for the private elements to avoid
warnings when kernel-doc script runs.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Nothing outside of indiustrialio-buffer.c should be using this.
Requires a large amount of juggling of functions to avoid a
forward definition.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
The earlier deployed LIS3LV02DL driver had already defined a few
DT bindings that need to be supported by the new more generic
driver and listed as compatible but deprecated bindings in the
documentation.
After this we can start to activate the new driver with the old
systems where applicable.
As part of this enablement: make us depend on the old drivers
not being in use so we don't get a kernel with two competing
drivers.
Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Eliminate the non-standard attributes in_voltage_range and
in_voltage_range_available. Implement in_voltage_scale_available in place
of these attributes and update the SCALE accordingly. The array
scale_avail is introduced to hold the available scale values.
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Gravity sensor is a soft sensor, which derives value from
standard accelerometer device by filtering out the acceleration
which is not caused by gravity.
Gravity sensor provides a three dimensional vector indicating
the direction and magnitude of gravity. Typically, this sensor
is used to determine the device's relative orientation in space.
The units and the coordinate system is the same as the one used by
the acceleration sensor.
When a device is at rest, the output of the gravity sensor should
be identical to that of the accelerometer.
More information can be found in:
http://www.usb.org/developers/hidpage/HUTRR59_-_Usages_for_Wearables.pdf
Gravity sensor and accelerometer have similar channels and
share channel usage ids. So the most of the code for accel_3d
can be reused.
Signed-off-by: Song Hongyan <hongyan.song@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
trivial fix to spelling mistake in iio documentation
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This patch adds the ACPI/PNP ID. The AD5592/3 driver core is already
designed around the unified device property API.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This patch adds the ACPI/PNP ID. The AD5592/3 driver core is already
designed around the unified device property API.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This adds a driver for the Capella Microsystems CM3605 Ambient
Light Sensor and proximity sensor. This is a pretty simple entirely
analog device that is interfaced with the target system using
the POUT (proximity out) and AOUT (ambient light out) signals.
The POUT signal is a simple high/low signal that indicates whether
an object is in proximity, most typically used to detect a face
in front of a mobile device. The signal requires that an infrared
LED is mounted next to the device, making IR light reflect off
the object in proximity and triggering the POUT signal. We grab
a GPIO pin to handle the POUT signal as an interrupt line and
register this as an event channel for the sensor.
Since the proximity sensor requires an IR LED, we add a LED trigger
named "cm3605" so that the infrared LED can just associate with
this trigger to be sure it is always on when the proximity sensor
needs it.
The AOUT is an analog voltage between 0 and 1550 mV that indicate
the LUX value in the ambient light: this is orthogonal to the
proximity sensor functionality. Since this analog voltage needs
to be converted into a digital value, the driver grabs an IIO
channel named "aout" associated with the device.
This patch created a combined ALS and proximity sensor driver.
The former supports raw reads of the LUX value and the latter
will generate proximity events.
To integrate this properly with Linux we also add a supply
regulator for the VDD pin (driving both functions) and add device
tree bindings to define the RSET resistor that in turn configures
the luminosity range of the ALS sensor.
Since the sensor needs to be on more or less constantly, we
restrict the power management to system suspend/resume: we
disable the IR LED and disable the regulator for VDD on suspend
and take them back up on resume.
Tests:
cd /sys/bus/iio/devices/iio:device1
cat in_illuminance_raw
304
(hold hand over sensor)
cat in_illuminance_raw
17
iio_event_monitor cm3605
Found IIO device with name cm3605 with device number 1
(hold hand over sensor)
Event: time: 2444842301447, type: proximity, channel: 0,
evtype: thresh, direction: falling
(remove hand over sensor)
Event: time: 2445583440706, type: proximity, channel: 0,
evtype: thresh, direction: rising
Cc: Capella Microsystems <capellamicro@gmail.com>
Cc: Kevin Tsai <ktsai@capellamicro.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
There is one light sensor type defined in the sensor hub specification,
which has one Illuminance field. It doesn't distinguish between ambient
light sensor or color sensor. Currently it is presented as IIO_INTENSITY
channel. There are some user spaces specifically looking for IIO_LIGHT
channel.
To satisfy such user spaces this change also add a duplicate IIO_LIGHT
channel. The units of measurement of Illuminance field is Lux, so it is
still compatible to IIO ABI.
Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Both devices are using the same iio_chan_spec to define which settings
are exported with sysfs. Both are properly configured to set/get
sampling frequency for pressure and temperature. They also properly
export available sampling frequencies. The only missing thing is
sampling_frequency sysfs file, which allows to set/get this property
from userspace.
Add sampling frequency to iio channel info mask, so sampling_frequency
file is properly exported using sysfs.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Datasheet of each device (lps331ap, lps25h, lps001wp, lps22hb) says that
the pressure and temperature data is a 2's complement.
I'm sending this the slow way, as negative pressures on these are pretty
unusual and the nature of the fixing of multiple device introduction patches
will make it hard to apply to older kernels - Jonathan.
Fixes: 217494e5b7 ("iio:pressure: Add STMicroelectronics pressures driver")
Fixes: 2f5effcbd0 ("iio: pressure-core: st: Expand and rename LPS331AP's channel descriptor")
Fixes: 7885a8ce68 ("iio: pressure: st: Add support for new LPS001WP pressure sensor")
Fixes: e039e2f5b4 ("iio:st_pressure:initial lps22hb sensor support")
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This adds documentation for Bosch BMI160 Inertial Measurement Unit
device-tree bindings.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
From now on we can add bmi160 device to device-tree by specifying
compatible string.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
From now on we can add bmi160 device to device-tree by specifying
compatible string.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Jonathan Cameron
Linus Walleij
Eva Rachel Retuya
rishabh hardas
Song Hongyan
Matt Ranostay
Colin Ian King
Scott Matheina
Peter Meerwald-Stadler
Michael Hennerich
Kweh, Hock Leong
Marcin Niestroj
Nizam Haider