This is a reimplementation of the old misc device driver for the
ROHM BH1780 ambient light sensor (drivers/misc/bh1780gli.c).

Differences from the old driver:
- Uses the IIO framework
- Uses runtime PM to idle the hardware after 5 seconds
- No weird custom power management from userspace
- No homebrewn values in sysfs

This uses the same (undocumented) device tree compatible-string
as the old driver ("rohm,bh1780gli").

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Indent lines inside if statement.
Signed-off-by: NKsenija Stanojevic <ksenija.stanojevic@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some variants of the devices from the ADIS family don't auto-clear the
self-test bit after the self-test has completed. Instead we have to
manually clear. Add support for this to the ADIS library.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the errors reported by checkpatch.pl:

ERROR: code indent should use tabs where possible
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: else should follow close brace '}'
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: code indent should use tabs where possible
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: code indent should use tabs where possible
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: space prohibited before that ',' (ctx:WxW)
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the errors reported by checkpatch.pl:

ERROR: space prohibited before that ',' (ctx:WxW)
ERROR: code indent should use tabs where possible
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: space prohibited before that ',' (ctx:WxW)
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: switch and case should be at the same indent
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: space required before the open parenthesis '('
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This fixes the error reported by checkpatch.pl:

ERROR: that open brace { should be on the previous line
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

BMI160 is an Inertial Measurement Unit (IMU) which provides acceleration
and angular rate measurement. It also offers a secondary I2C interface
for connecting a magnetometer sensor (usually BMM160).

Current driver offers support for accelerometer and gyroscope readings
via sysfs or via buffer interface using an external trigger (e.g.
hrtimer). Data is retrieved from IMU via I2C or SPI interface.

Datasheet is at:
	http://www.mouser.com/ds/2/783/BST-BMI160-DS000-07-786474.pdfSigned-off-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

* Unify log messages
* Add more DEBUG messages

Apparently this driver is working unreliably on some platforms that I can't
test. Therefore I want an easy way for bug reporters to provide useful
information without making the driver too chatty by default.
Signed-off-by: NHarald Geyer <harald@ccbib.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Driver includes struct regmap and struct device in its global data.
Remove the struct device and use regmap API to retrieve device info.

Patch created using Coccinelle plus manual edits.
Signed-off-by: NAlison Schofield <amsfield22@gmail.com>
Acked-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for the AD5592R (spi) and AD5593R (i2c)
ADC/DAC/GPIO devices.
Signed-off-by: NPaul Cercueil <paul.cercueil@analog.com>
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This will be used together with an external trigger (e.g hrtimer based
software trigger).
Signed-off-by: NGregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The following functions are supported:
 - write, read potentiometer value
 - potentiometer scale

Datasheet: https://datasheets.maximintegrated.com/en/ds/DS1803.pdfSigned-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

bmc150_i2c_regmap_conf is defined three times (in bmc150-accel-core.c,
bmc150-accel-i2c.c and and bmc150-accel-spi.c), although the
definition is the same.

Use one common definition for bmc150_i2c_regmap_conf in all
included files.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NCrestez Dan Leonard <leonard.crestez@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

UV index indicating strength of sunburn-producing ultraviolet (UV) radiation
Signed-off-by: NPeter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NPeter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The scale would result in uV instead of expected mV.
Mostly cosmetic, since the value of 'Power' was computed OK.
Signed-off-by: NMarc Titinger <marc.titinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add signed differential channels and update the voltage scale for
differential conversions.
Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Do not erase previous configuration of the mode register when setting
the sampling frequency.
Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The following functionalities are supported:
 - write, read from volatile memory

Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22060b.pdfSigned-off-by: NSlawomir Stepien <sst@poczta.fm>
Reviewed-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Commit 845c8770 ("i2c / ACPI: Assign IRQ for devices that have
GpioInt automatically") automatically assigns the first ACPI GPIO
interrupt in client->irq, so we can remove the probing code from
drivers that use only one interrupt.

Commit 0f079650 ("iio: remove gpio interrupt probing from drivers
that use a single interrupt") removes gpio interrupt probing from most
drivers. This patch cleans the remaining ones.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

GPIO handling code has been removed from the drivers (since
this is now handled by the ACPI core) in commit 0f079650 ("iio:
remove gpio interrupt probing from drivers that use a single interrupt").

Remove the include for linux/gpio/consumer.h since it is no longer
used.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some i2c busses (e.g.: Synopsys DesignWare I2C adapter) need to
enable/disable the bus at each i2c transfer and must wait for
the enable/disable to happen before sending the data.

When reading data in the trigger handler, the kxcjk-1013 accel driver
does one i2c transfer for each axis. This has an impact on the
frequency of the accelerometer at high sample rates due to additional
delays introduced by the i2c bus at each transfer.

Reading all axis values in one i2c transfer reduces the delays
introduced by the i2c bus. Uses i2c_smbus_read_i2c_block_data_or_emulated
that will fallback to reading each axis as a separate word in case i2c
block read is not supported.
Signed-off-by: NAdriana Reus <adriana.reus@intel.com>
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Acked-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use available_scan_masks to allow the iio core to select
the data to send to userspace depending on which axes are
enabled, instead of doing this in the driver's interrupt
handler.
Signed-off-by: NAdriana Reus <adriana.reus@intel.com>
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Acked-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some i2c busses (e.g.: Synopsys DesignWare I2C adapter) need to
enable/disable the bus at each i2c transfer and must wait for
the enable/disable to happen before sending the data.

When reading data in the trigger handler, the bmg160 gyro driver does
one bus transfer for each axis. This has an impact on the frequency
of the accelerometer at high sample rates due to additional delays
introduced by the bus at each transfer.

Reading all axis values in one bus transfer reduces the delays
introduced by the bus.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use available_scan_masks to allow the iio core to select
the data to send to userspace depending on which axes are
enabled, instead of doing this in the driver's interrupt
handler.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Some i2c busses (e.g.: Synopsys DesignWare I2C adapter) need to
enable/disable the bus at each i2c transfer and must wait for
the enable/disable to happen before sending the data.

When reading data in the trigger handler, the bmc150 accel driver does
one bus transfer for each axis. This has an impact on the frequency
of the accelerometer at high sample rates due to additional delays
introduced by the bus at each transfer.

Reading all axis values in one bus transfer reduces the delays
introduced by the bus.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use available_scan_masks to allow the iio core to select
the data to send to userspace depending on which axes are
enabled, instead of doing this in the driver's interrupt
handler.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use const pointer to element from model configuration array rather then array
index, as it will not change anyway.
Signed-off-by: NSlawomir Stepien <sst@poczta.fm>
Signed-off-by: NPeter Rosin <peda@axentia.se>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The driver goes to some length to dynamically allocate an array
to hold the channel addresses. However no ST sensor has more than
three channels (x, y, z at most). Instead of kmalloc():ing and
kfree():in the address array, just use a fixed array of three
elements.

Cc: Giuseppe Barba <giuseppe.barba@st.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NDenis Ciocca <denis.ciocca@st.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The user (or an init script) may setup RShunt via sysfs after the
driver was initialized, for instance based on the EEPROM contents
of a modular probe. The calibration register must be set accordingly.
Signed-off-by: NMarc Titinger <marc.titinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Ensure optional regulator is properly disabled when present.

Fixes: 63d5d525 ("iio:magnetometer:ak8975: power regulator support")
Signed-off-by: NGregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

flush_scheduled_work is scheduled for deprecation.
Replace cancel_delayed_work and flush_scheduled_work with
cancel_delayed_work_sync instead to ensure there is no pending or
running work item.

Since there is only one work item, chip->poweroff_work, there are
no further dependencies of flush_scheduled_work().
Acked-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NAmitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>