val2 is responsible for the floating part of the number to be
written to the device. We don't need the floating part
while writing the oversampling ratio for BME680 since the
available oversampling ratios are pure natural numbers.
So, add a sanity check to make sure val2 is 0.
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
MCP3911 is a dual channel Analog Front End (AFE) containing two
synchronous sampling delta-sigma Analog-to-Digital Converters (ADC).
Co-developed-by: Kent Gustavsson <kent@minoris.se>
Signed-off-by: Kent Gustavsson <kent@minoris.se>
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes ef89f4b96a ("iio: adxl345: Add support for the ADXL375").
This was found via static checker.
After looking into the code a bit, it's unlikely that there will be a NULL
dereference if the `id` object in that specific code path.
However, it's safe to add a NULL (paranoid) check just to make sure and
remove any uncertainties.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Variable max44000_alstim_shift is defined but is never used hence it is
redundant and can be removed. This variable has been like this since
the driver was added back in 2016.
Cleans up clang warning:
warning: 'max44000_alstim_shift' defined but not used [-Wunused-const-variable=]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds support for the adxl372 FIFO. In order to accomplish this,
triggered buffers were used.
The number of FIFO samples which trigger the watermark interrupt can be
configured by using the buffer watermark. The FIFO format is determined by
configuring the scan elements for each axis. The FIFO data is pushed to the
IIO device's buffer.
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds basic support for Analog Devices ADXL372 SPI-Bus
Three-Axis Digital Accelerometer.
The device is probed and configured the with some initial default
values. With this basic driver, it is possible to read raw acceleration
data.
Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL372.pdf
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add ADC5_AMUX_THM2_100K_PU and ADC5_AMUX_THM4_100K_PU to the list of
rev2 ADC channels.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
After finding a reasonable gain, the function converts the configured
gain to a gain configuration option selector enum max9611_csa_gain.
Make the conversion clearly visible by using an explicit cast. This
also avoids a warning seen with clang:
drivers/iio/adc/max9611.c:292:16: warning: implicit conversion from
enumeration type 'enum max9611_conf_ids' to different enumeration
type 'enum max9611_csa_gain' [-Wenum-conversion]
*csa_gain = gain_selectors[i];
~ ^~~~~~~~~~~~~~~~~
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This is already handled by SIMPLE_DEV_PM_OPS().
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This is already handled by SIMPLE_DEV_PM_OPS().
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This is already handled by SIMPLE_DEV_PM_OPS().
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Notice that in this particular case, I placed the "fall through"
annotation at the bottom of the case, which is what GCC is expecting
to find.
Addresses-Coverity-ID: 1458342 ("Missing break in switch")
Addresses-Coverity-ID: 1458345 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Compatible strings tend to follow manufacturer,model format.
In case one wants to do a matching with manufacturer stripped
off he can still do so since SPI/I2C core will try id_table
based matching anyway.
Signed-off-by: Tomasz Duszynski <tduszyns@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Temperature, pressure and humidity all expose and oversampling setting
that works in the same way. Provide common handling for the
oversampling sysfs attributes.
Signed-off-by: David Frey <dpfrey@gmail.com>
Reviewed-by: Himanshu Jha <himanshujha199640@gmail.com>
Tested-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use the FIELD_GET macro instead of explicit mask and shift.
Signed-off-by: David Frey <dpfrey@gmail.com>
Reviewed-by: Himanshu Jha <himanshujha199640@gmail.com>
Tested-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Convert all defines to use "MASK" instead of a mix of "MSK" and "MASK"
Signed-off-by: David Frey <dpfrey@gmail.com>
Reviewed-by: Himanshu Jha <himanshujha199640@gmail.com>
Tested-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use the full 80 char width to reduce the number of lines taken
by function calls.
Remove blank lines where it aids clarity by bringing together related
code blocks (such as read hi and low bytes and then combine them into
one value).
Signed-off-by: David Frey <dpfrey@gmail.com>
Reviewed-by: Himanshu Jha <himanshujha199640@gmail.com>
Tested-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds support for the regulator framework to the tsl2772
driver. Driver was tested using a LG Nexus 5 (hammerhead) phone with
the two regulators and on a Raspberry Pi 2 without any regulators
controlling the power to the sensor.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds support for optionally reading the proximity led diode
and current settings from device tree. This was tested using a LG
Nexus 5 (hammerhead) which requires a different diode than the driver
default for the IR LED.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds support for the regulator framework to the mpu6050
driver.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds support for QCOM SPMI PMIC5 family
of ADC driver that supports hardware based offset and
gain compensation. The ADC peripheral can measure both
voltage and current channels whose input signal is
connected to the PMIC ADC AMUX.
The register set and configuration has been refreshed
compared to the prior QCOM PMIC ADC family. Register
ADC5 as part of the IIO framework.
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
fix spelling mistake in dev_err error message text
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Read response register to detect any error.
Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@gmail.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The current check on val always results in true and so the
call to sii1133_update_adcsens never gets called. Fix this check
so it returns with -EINVAL only when val is not zero and not one.
Detected by CoverityScan, CID#1472099 ("Logically dead code")
Fixes: e01e7eaf37 ("iio: light: introduce si1133")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Enabling the Interrupts before registering the irq handler is a bad
idea. This patch corrects the same for XADC driver.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch avoids getting irq number in xadc_remove function. Instead
store 'irq' in xadc struct and use xadc->irq wherever needed.
This patch also resolves a warning reported by coverity where it asks to
check return value of platform_get_irq() for any errors in xadc_remove.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch limits the xadc pcap clock frequency value to be less than
200MHz. This fixes the issue when zynq is booted at higher frequency
values, pcap crosses the maximum limit of 200MHz(Fmax) as it is derived
from IOPLL.
If this limit is crossed it is required to alter the WEDGE and REDGE
bits of XADC_CFG register to make timings better in the interface. So to
avoid alteration of these bits every time, the pcap value should not
cross the Fmax limit.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This patch adds check for return values from clock related functions.
This was reported by static code analysis tool.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
VCNL4200 is an integrated long distance (up to 1500mm) proximity and
ambient light sensor.
The support is very basic. There is no configuration of proximity and
ambient light sensing yet. Only the reading of both measured values is
done.
The reading of ambient light and proximity values is blocking. If you
request a new value too early, the driver waits for new value to be
ready.
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
We can detect incorrectly specified device id for some chips, so warn
user in that case.
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The driver already supports VCNL4010/20 devices. The currently supported
features and detectable product id are the same, so add shared id for
them.
This is a groundwork to extend the driver by detecting incorrectly
specified device id.
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
There are similar chips in the vcnl4xxx family. The initialization and
communication is a bit different for members of the family, so this
patch makes the driver extendable for different chips.
There is no functional change.
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
wait_for_completion_timeout returns unsigned long not int so an appropriate
variable is declared and the assignment and check fixed up.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Bosch BME680 is a 4-in-1 sensor with temperature, pressure, humidity
and gas sensing capability. It supports both I2C and SPI communication
protocol for effective data communication.
The device supports two modes:
1. Sleep mode
2. Forced mode
The measurements only takes place when forced mode is triggered and a
single TPHG cycle is performed by the sensor. The sensor automatically
goes to sleep after afterwards.
The device has various calibration constants/parameters programmed into
devices' non-volatile memory(NVM) during production and can't be altered
by the user. These constants are used in the compensation functions to
get the required compensated readings along with the raw data. The
compensation functions/algorithms are provided by Bosch Sensortec GmbH
via their API[1]. As these don't change during the measurement cycle,
therefore we read and store them at the probe. The default configs
supplied by Bosch are also set at probe.
0-day tested with build success.
GSoC-2018: https://summerofcode.withgoogle.com/projects/#6691473790074880
Mentor: Daniel Baluta
[1] https://github.com/BoschSensortec/BME680_driver
Datasheet:
https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME680-DS001-00.pdf
Note from Jonathan: The compensation functions are 'interesting' and
could do with a tidy up in future. However, they work so we can leave that
for another day.
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The AD9523 supports external signals for power-down mode, resetting the
device and sync timing.
This change add support for specifying values for these signals via the
gpios and initializing them default values.
For the reset signal, the GPIO is toggled during probing to re-initialize
the device to a known state.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
A sysfs write callback function needs to either return the number of
consumed characters or an error.
The ad952x_store() function currently returns 0 if the input value was "0",
this will signal that no characters have been consumed and the function
will be called repeatedly in a loop indefinitely. Fix this by returning
number of supplied characters to indicate that the whole input string has
been consumed.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes: cd1678f963 ("iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
There are also a couple of fixes that can wait for the coming merge
window.
Core new features
* Support for phase channels (used in time of flight sensors amongst
other things)
* Support for deep UV light channel modifier.
New Device Support
* AD4758 DAC
- New driver and dt bindings.
* adxl345
- Support the adxl375 +-200g part which is register compatible.
* isl29501 Time of flight sensor.
- New driver
* meson-saradc
- Support the Meson8m2 Socs - right now this is just an ID, but there will
be additional difference in future.
* mpu6050
- New ID for 6515 variant.
* si1133 UV sensor.
- New driver
* Spreadtrum SC27xx PMIC ADC
- New driver and dt bindings.
Features
* adxl345
- Add calibration offset readback and writing.
- Add sampling frequency control.
Fixes and Cleanups
* ad5933
- Use a macro for the channel definition to reduce duplication.
* ad9523
- Replace use of core mlock with a local lock. Part of ongoing efforts
to avoid confusing the purpose of mlock which is only about iio core
state changes.
- Fix displayed phase which was out by a factor of 10.
* adxl345
- Add a link to the datasheet.
- Rework the use of the address field in the chan_spec structures to
allow addition of more per channel information.
* adis imu
- Mark switch fall throughs.
* at91-sama5d2
- Fix some casting on big endian systems.
* bmp280
- Drop some DT elements that aren't used and should mostly be done from
userspace rather than in DT.
* hx711
- add clock-frequency dt binding and resulting delay to deal with capacitance
issue on some boards.
- fix a spurious unit-address in the example.
* ina2xx
- Avoid a possible kthread_stop with a stale task_struct.
* ltc2632
- Remove some unused local variables (assigned but value never used).
* max1363
- Use device_get_match_data to remove some boilerplate.
* mma8452
- Mark switch fall throughs.
* sca3000
- Fix a missing return in a switch statement (a bad fallthrough
previously!)
* sigma-delta-modulator
- Drop incorrect unit address from the DT example.
* st_accel
- Use device_get_match_data to drop some boiler plate.
- Move to probe_new for i2c driver as second parameter not used.
* st_sensors library
- Use a strlcpy (safe in this case).
* st_lsm6dsx
- Add some error logging.
* ti-ads7950
- SPDX
- Allow simultaneous buffered and polled reads. Needed on a Lego Mindstorms
EV3 where some channels are used for power supply monitoring at a very low
rate.
* ti-dac5571
- Remove an unused variable.
* xadc
- Drop some dead code.
-----BEGIN PGP SIGNATURE-----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=T+hS
-----END PGP SIGNATURE-----
Merge tag 'iio-for-4.19b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next
Jonathan writes:
Second set of IIO new device support, features and cleanups.
There are also a couple of fixes that can wait for the coming merge
window.
Core new features
* Support for phase channels (used in time of flight sensors amongst
other things)
* Support for deep UV light channel modifier.
New Device Support
* AD4758 DAC
- New driver and dt bindings.
* adxl345
- Support the adxl375 +-200g part which is register compatible.
* isl29501 Time of flight sensor.
- New driver
* meson-saradc
- Support the Meson8m2 Socs - right now this is just an ID, but there will
be additional difference in future.
* mpu6050
- New ID for 6515 variant.
* si1133 UV sensor.
- New driver
* Spreadtrum SC27xx PMIC ADC
- New driver and dt bindings.
Features
* adxl345
- Add calibration offset readback and writing.
- Add sampling frequency control.
Fixes and Cleanups
* ad5933
- Use a macro for the channel definition to reduce duplication.
* ad9523
- Replace use of core mlock with a local lock. Part of ongoing efforts
to avoid confusing the purpose of mlock which is only about iio core
state changes.
- Fix displayed phase which was out by a factor of 10.
* adxl345
- Add a link to the datasheet.
- Rework the use of the address field in the chan_spec structures to
allow addition of more per channel information.
* adis imu
- Mark switch fall throughs.
* at91-sama5d2
- Fix some casting on big endian systems.
* bmp280
- Drop some DT elements that aren't used and should mostly be done from
userspace rather than in DT.
* hx711
- add clock-frequency dt binding and resulting delay to deal with capacitance
issue on some boards.
- fix a spurious unit-address in the example.
* ina2xx
- Avoid a possible kthread_stop with a stale task_struct.
* ltc2632
- Remove some unused local variables (assigned but value never used).
* max1363
- Use device_get_match_data to remove some boilerplate.
* mma8452
- Mark switch fall throughs.
* sca3000
- Fix a missing return in a switch statement (a bad fallthrough
previously!)
* sigma-delta-modulator
- Drop incorrect unit address from the DT example.
* st_accel
- Use device_get_match_data to drop some boiler plate.
- Move to probe_new for i2c driver as second parameter not used.
* st_sensors library
- Use a strlcpy (safe in this case).
* st_lsm6dsx
- Add some error logging.
* ti-ads7950
- SPDX
- Allow simultaneous buffered and polled reads. Needed on a Lego Mindstorms
EV3 where some channels are used for power supply monitoring at a very low
rate.
* ti-dac5571
- Remove an unused variable.
* xadc
- Drop some dead code.
The IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY case is missing a
return and will fall through to the default case and errorenously
return -EINVAL.
Fix this by adding in missing *return ret*.
Fixes: 626f971b5b ("staging:iio:accel:sca3000 Add write support to the low pass filter control")
Reported-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fix the displayed phase for the ad9523 driver. Currently the most
significant decimal place is dropped and all other digits are shifted one
to the left. This is due to a multiplication by 10, which is not necessary,
so remove it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Fixes: cd1678f963 ("iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The SAR ADC on Meson8m2 behaves identical to the one found in the
Meson8b SoCs. Add a separate compatible string because the temperature
sensor logic (not supported yet) differs between Meson8 and Meson8m2
(however, it's the same for Meson8b and Meson8m2).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This modifies the TI ADS7950 A/DC driver to allow the simultaneous use
of both the triggered buffer and reading channels directly (via in-
kernel API or sysfs).
The use case for this is on LEGO MINDSTORMS EV3. Two of the voltage
channels are used in-kernel by a power supply driver, which reads the
values using iio_read_channel_processed(). These channels are only read
at a slow rate (<= 1Hz). However, we want to be able to read 12 other
channels at the same time using the triggered buffer at a high rate (>=
100Hz).
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This updates the ti-ads7950.c file to use SPDX-License-Identifier
instead of more verbose license text.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This code is problematic because we're supposed to be writing an int but
we instead write to only the high 16 bits. This doesn't work on big
endian systems, and there is a potential that the bottom 16 bits are
used without being initialized.
Fixes: 23ec2774f1 ("iio: adc: at91-sama5d2_adc: add support for position and pressure channels")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This is also part of a long term effort to make the use of mlock opaque and
single purpose.
This lock is required for accessing device registers. The device may be
accessed by multiple processes at the same time, and this can result in
inconsistent data, where one device reads data before the other one has
finished writing.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Himanshu Jha