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Currently the for-loop that scans for the optimial adc_period iterates
through all the possible adc_period levels because the exit logic in
the loop is inverted. I believe the comparison should be swapped and
the continue replaced with a break to exit the loop at the correct
point.
Addresses-Coverity: ("Continue has no effect")
Fixes: e08e19c331fb ("iio:adc: add iio driver for Palmas (twl6035/7) gpadc")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210730071651.17394-1-colin.king@canonical.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The ADS7950 requires that CS is deasserted after each SPI word. Before
commit e2540da86ef8 ("iio: adc: ti-ads7950: use SPI_CS_WORD to reduce
CPU usage") the driver used a message with one spi transfer per channel
where each but the last one had .cs_change set to enforce a CS toggle.
This was wrongly translated into a message with a single transfer and
.cs_change set which results in a CS toggle after each word but the
last which corrupts the first adc conversion of all readouts after the
first readout.
Fixes: e2540da86ef8 ("iio: adc: ti-ads7950: use SPI_CS_WORD to reduce CPU usage")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: David Lechner <david@lechnology.com>
Tested-by: David Lechner <david@lechnology.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210709101110.1814294-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The call to pm_runtime_put_noidle() in remove() is not balancing a
counter increment. Note this doesn't matter as the runtime pm core
will not allow the counter to go negative. However, it is confusing
to the reader so let's remove it.
The pm_runtime_resume_and_get() replacement was found using coccicheck
script under review at:
https://lore.kernel.org/lkml/20210427141946.2478411-1-Julia.Lawall@inria.fr/
This is a prequel to taking a closer look at the runtime pm in IIO drivers
in general.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20210516162103.1332291-3-jic23@kernel.org
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iio_push_to_buffers_with_timestamp()
Add __aligned(8) to ensure the buffer passed to
iio_push_to_buffers_with_timestamp() is suitable for the naturally
aligned timestamp that will be inserted.
Fixes: f214ff521fb1 ("iio: ti-ads8688: Update buffer allocation for timestamps")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210613152301.571002-5-jic23@kernel.org
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iio_push_to_buffers_with_timestamp()
To make code more readable, use a structure to express the channel
layout and ensure the timestamp is 8 byte aligned.
Add a comment on why the buffer is the size it is as not immediately
obvious.
Found during an audit of all calls of this function.
Fixes: 6dd112b9f85e ("iio: adc: mxs-lradc: Add support for ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Andreas Klinger <ak@it-klinger.de>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210613152301.571002-4-jic23@kernel.org
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To make code more readable, use a structure to express the channel
layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of this function.
Fixes: d3bf60450d47 ("iio: hx711: add triggered buffer support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Andreas Klinger <ak@it-klinger.de>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210613152301.571002-3-jic23@kernel.org
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iio_push_to_buffers_with_timestamp()
To make code more readable, use a structure to express the channel
layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of this function.
Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210613152301.571002-2-jic23@kernel.org
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These were usually used before the conversion to devm_ functions, so that
the remove hook would be able to retrieve the pointer and do cleanups on
remove.
When the conversion happened, they should have been removed, but were
omitted.
Some drivers were copied from drivers that fit the criteria described
above. In any case, in order to prevent more drivers from being used as
example (and have spi_set_drvdata() needlessly set), this change removes it
from the IIO ADC group.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513111035.77950-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Since all AD Sigma-Delta drivers now use the
devm_ad_sd_setup_buffer_and_trigger() function, we can remove the old
ad_sd_{setup,cleanup}_buffer_and_trigger() functions.
This way we can discourage new drivers that use the ad_sigma_delta
lib-driver to use these (older functions).
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-13-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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As not many steps were not already devm_ managed, use
devm_add_action_or_reset() to handle the rest.
This also uses the new devm_ad_sd_setup_buffer_and_trigger() function.
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-12-aardelean@deviqon.com
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With the devm_ad_sd_setup_buffer_and_trigger() helper, it's a bit easier
now to convert the probe of the AD7192 driver to use device-managed
functions.
The regulators and the mclk requires devm_add_action_or_reset() callbacks
though.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-11-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The devm_clk_get_optional() helper returns NULL when devm_clk_get() returns
-ENOENT.
This makes things slightly cleaner. The added benefit is mostly cosmetic.
Also, a minor detail with this call, is that the reference for the parent
device is taken as `spi->dev` instead of `&st->sd.spi->dev` (which looks a
little quirky).
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-10-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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With the devm_ad_sd_setup_buffer_and_trigger() helper, it's a bit easier
now to convert the probe of the AD7780 driver to use device-managed
functions.
Only the regulator disable requires a devm_add_action_or_reset() callback.
This change does that, cleaning up the driver a bit.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-9-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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With the devm_ad_sd_setup_buffer_and_trigger() helper, it's a bit easier
now to convert the probe of the AD7791 driver to use device-managed
functions.
Only the regulator disable requires a devm_add_action_or_reset() callback.
This change does that, cleaning up the driver a bit.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-8-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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With the devm_ad_sd_setup_buffer_and_trigger() helper, it's a bit easier
now to convert the probe of the AD7793 driver to use device-managed
functions.
Only the regulator disable requires a devm_add_action_or_reset() callback.
This change does that, cleaning up the driver a bit.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-7-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This is a version of ad_sd_setup_buffer_and_trigger() with all underlying
functions (that are used) being replaced with their device-managed
variants.
One thing to take care here is with {devm_}iio_trigger_alloc(), where both
functions take a parent-device object as the first parameter.
To make sure nothing quirky is happening, the devm_ad_sd_probe_trigger()
function is checking that the provided 'dev' reference is the same as the
one stored on the 'struct ad_sigma_delta' driver data.
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-6-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next
Jonathan writes:
1st set of new IIO/counter device support, features and cleanup for 5.14
There are a couple of large cleanup sets in here alongside a number of new
drivers.
Note an immutable branch merged to add a stub for i2c_verify_client()
as needed to avoid a build issue in the fxls8962af driver as a result of a
workaround for a device errata that only applies when i2c interface is used.
Counters
========
New device support
* intel,quadrature encoder peripheral found on Elkhart Lake platforms.
- New driver.
IIO
===
New device support
* amstaos,tsl2591 ambient light sensor.
- New driver + bindings
- Follow up fix to ensure some local variables are suitable for error
handling.
* fsl,fxls8962af + fsl,fxls8964af accelerometers
- New driver + bindings
- Includes an errata work around that cause a build bot failure fixed
by adding a stub to i2c.
* kionix,kxcjk-1013
- Add support for KX023-1025 device. Mostly a different register map
that needed to be supported.
* murata,sca3300 accelerometer
- New driver + bindings
* st,lsm9ds0 IMU
- Rework of st,sensors driver to cleanly support this new glue driver
that enables the two parts of the LSM9DS0.
* ti,tsc2046 touchscreen controller ADC.
- New driver. Intent here is to use this with existing IIO consumer
drivers such as resistive-adc-touch.
- Follow up fix to avoid an issue with unsigned subtraction in error
check.
* ti,tmp117 digital temperature sensor
- New driver + bindings
Features
* adi,ad5755
- Add missing dt-binding doc
* adi,ad7298
- Add ACPI ID used on Intel Galileo Gen 1 boards.
- Add missing dt-binding doc
* adi,ad7476
- Add missing dt-binding doc
* adi,ad7746
- Add missing dt-binding doc for this driver that will hopefully move out
of staging shortly. Update staging driver to use the binding instead of
platform data.
* adi,adis16201 + adis16209
- Add missing dt-binding doc
* adi,adis16480
- Support burst mode for adis16495 and adis16497 parts.
* bosch,bma220
- Add missing dt-binding doc
* fsl,mma7455
- Add missing dt-binding doc
* iio-rescale
- Support handling of processed channels from provider. Some ADCs
require (typically non linear) calibration functions to be applied,
and so provide only IIO_CHAN_INFO_PROCESSED read back. They can be
used as providers to the iio-rescale driver which needs to handle them
somewhat differently from IIO_CHAN_INFO_RAW
* sensiron,sps30
- Support the serial interface. Note this required significant
refactoring of existing driver.
* st,st-sensors
- Add mount matrix support for normal dt-binding whilst continuing to
support the odd ACPI approach for accelerometers.
* ti,dac082s085 + similar
- Add missing dt-binding doc
* trivial-devices - add entries for
- memsic,mx4005, memsic,mx6255 and memsic,mxc6655
- sensortek,stk8312 and sensortek,stk8ba50
Cleanup / minor fixes
* core
- Use devm_add_action_or_reset() to replace boilerplate in several
driver and core IIO devm_* functions.
- Fix an error path issue introduced by above, that could return an
error pointer rather than the expected null from dev_iio_device_alloc()
- Move more IIO internals related fields from struct iio_dev to
struct iio_dev_opaque.
- Drop unused final update of in_loc in demux setup.
* Docs
- Move some docs from driver specific to core dos to avoid replication
of names which the documentation builder does not allow.
Note this means adding a few device specific notes to the general docs
to cover the more unusual uses of the ABI.
- ABI: Move old buffer/* and scan_elements/* docs to obsolete as now we
have the bufferX/* variant. Not we are not getting rid of these
interfaces, just encouraging new code to use the new interface.
* IIO wide:
- Tidy up new cases of dev.parent etc being set in drivers as the core
now does it.
- Fix more cases of possible miss-aligned buffers when passed to
iio_push_to_buffers_with_timestamp(). Note we only have one known
instance of anyone seeing this bug actually happening, so this has been
a low priority cleanup effort for several cycles.
- sysfs_emit() used in more drivers.
- Runtime pm tidy up and use of pm_runtime_resume_and_get()
- Buffer alignment fixes as iio_push_to_buffers_with_timestamp requires
that the timestamp when inserted by naturally aligned + consumers can
assume that all fields are naturally aligned. Part of a long running
effort, with at least 2 more series to come tackling additional
variants.
- Stop specifying "mount-matrix" property name in every lookup of the
mount matrix from firmware by hard coding it in the core.
* adi,ad7476
- Handle the variety of different regulators used by the parts supported
by this driver (came up in dt-binding review)
* adi,ad7746
- Trivial drop of if (ret) return ret; return 0; pattern
- Tidy up comments
- Pull capdac setup out to own function.
* adi,ad7766
- Trivial drop of if (ret) return ret; return 0; pattern
* adi,adis
- Avoid returning error codes in interrupt handlers.
- Handle a failure in spi_write in the trigger handler.
- Rework to add updating of device page after changing it.
- Don't push data to IIO buffers when read failed.
- Add configuration of burst max speed to core avoid handling this in
each driver.
- Use the adis_dev_lock() helper in adis16260 and adis16136 drivers.
- Excessive includes cleanup via include-what-you-use static checker
after zero day highlighted that these needed updating.
* afe
- Amend binding to add #io-channel-cells, thus allowing this IIO
consumer to also be an IIO provider.
* aosong,am2315
- Drop ACPI id. Unlikely this one is in the wild and it isn't valid
ACPI naming.
* bosch,bma180
- Adding missing bandwidth settings (500, 1000 Hz)
* bosch,bme680
- Drop ACPI id. Unlikely this one is in the wild and it isn't valid
ACPI naming.
* ep93xx_adc,
- Drop a redundant error print.
* maxim,max118
- Convert remainder of probe() to devm_ managed functions.
- Avoid some repeated jumping back and forth between iio_dev and
spi structures.
* maxim,max11100
- Use get_unaligned_be16() instead of open coding.
- Convert remainder of probe() to devm_ managed functions.
* samsung,exynos_adc
- Unused error value dropped.
* sensiron,sgp30
- Drop use of %hx in favor of %x and letting the normal type conversion
work.
* sensortek,stk8312
- Add lowercase device id and note uppercase version deprecated.
- Drop ACPI id. Unlikely this one is in the wild and it isn't valid
ACPI naming.
* sprx,sc72xx_adc
- add MODULE_DEVICE_TABLE
* st,lsm6dsx
- Fix docs of valid ODRs
* st,sensors
- dt-binding rework. Two efforts on this crossed in a previous cycle
so this update cherry picks the best of the two yaml conversions.
- Don't copy the channel spec array as now ext_info is no longer modified.
* st,stm32-adc
- tidy up some docs that were marked as kernel-doc but aren't.
* ti,adc081c, ti,adc0832, ti,adc108s102 and ti,adc161s626
- Convert remainder of probe() functions to devm_ managed functions
to simplify error handing and remove paths.
* tag 'iio-for-5.14a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (171 commits)
i2c: core: Add stub for i2c_verify_client() if !CONFIG_I2C
iio: adis: Cleanout unused headers
iio: accel: bma180: Add missing 500 Hz / 1000 Hz bandwidth
counter: Add support for Intel Quadrature Encoder Peripheral
staging: iio: cdc: ad7746: extract capac setup to own function
staging: iio: cdc: ad7746: clean up probe return
staging: iio: cdc: ad7746: remove ordinary comments
iio: adc: ti-adc161s626: Use devm managed functions for all of probe.
iio: adc: ti-adc108s102: Use devm managed functions for all of probe()
iio: adc: ti-adc0832: Use devm managed functions for all of probe()
iio: adc: ti-adc081c: Use devm managed functions for all of probe()
iio: adc: max1118: Avoid jumping back and forth between spi and iio structures
iio: adc: max1118: Use devm_ managed functions for all of probe
iio: adc: max11100: Use devm_ functions for rest of probe()
iio: adc: max11100: Use get_unaligned_be16() rather than opencoding.
iio: chemical: sgp30: Drop use of %hx in format string.
iio: gyro: st_gyro: Support mount matrix
iio: magnetometer: st_magn: Support mount matrix
iio: accel: st_sensors: Stop copying channels
iio: accel: st_sensors: Support generic mounting matrix
...
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Simplifies error handling and allows us to drop remove entirely.
The regulator handling in this driver was unusual as it would try to
acquire the regulator, but if that failed with an error would continue.
We should get a stub regulator if one isn't provided in DT and an error
could indicate an actual problem preventing the device being powered
(perhaps a need to defer). So this handling is cleaned up (arguably
that might be a fix but given no one has run into it, I haven't broken
it out separately.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <matt.ranostay@konsulko.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-9-jic23@kernel.org
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Simplifies error handling and lets us drop remove() entirely.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Bogdan Pricop <bogdan.pricop@emutex.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-8-jic23@kernel.org
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Simplifies error handling, plus allows us to drop the remove()
function entirely.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-7-jic23@kernel.org
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Simplifies error handling and allows us to drop remove() entirely.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-6-jic23@kernel.org
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Changing from passing the spi structure into various functions to
passing struct iio_dev avoids use of spi_get_drvdata and lets us
stop setting that at all. Previous code was unnecessarily complex.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-5-jic23@kernel.org
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This simplifies error handling and allows us to drop the remove
function entirely.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-4-jic23@kernel.org
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By using devm_add_action_or_reset() to manage the regulator disable,
it becomes simple to use managed functions for all of remove.
This simplifies error handling and allows us to drop the remove()
function entirely.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-3-jic23@kernel.org
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The function is more explicit in showing the intent + quicker on some
platforms.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210516172520.1398835-2-jic23@kernel.org
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These variables are unsigned so the condition can't be less than zero
and the warning message will never be printed.
Fixes: 9374e8f5a38d ("iio: adc: add ADC driver for the TI TSC2046 controller")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YJ+ZuO43TnguY5vq@mwanda
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Set error code while device ID query failed.
Fixes: 88bc30548aae ("IIO: ADC: New driver for AD7792/AD7793 3 Channel SPI ADC")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Fixes tag is where the max channels became 8, but timestamp space was missing
before that.
Fixes: 851644a60d20 ("iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Daniel Junho <djunho@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501165314.511954-3-jic23@kernel.org
Cc: <Stable@vger.kernel.org>
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iio_push_to_buffers_with_timestamp()
Add space for the timestamp to be inserted. Also ensure correct
alignment for passing to iio_push_to_buffers_with_timestamp()
Fixes: a5f8c7da3dbe ("iio: adc: Add AD7768-1 ADC basic support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501165314.511954-2-jic23@kernel.org
Cc: <Stable@vger.kernel.org>
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In the function ad7766_probe(), the return value of
devm_iio_device_register() can be zero or ret, Thus it
is unnecessary to repeated check here.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Co-developed-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20210511134739.948-1-tangbin@cmss.chinamobile.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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To make code more readable, use a structure to express the channel
layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of uses of
iio_push_to_buffers_with_timestamp()
Fixes: 0010d6b44406 ("iio: adc: vf610: Add IIO buffer support for Vybrid ADC")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Stefan-Gabriel Mirea <stefan-gabriel.mirea@nxp.com>
Cc: Sanchayan Maity <maitysanchayan@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501170121.512209-10-jic23@kernel.org
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iio_push_to_buffers_with_timestamp()
To make code more readable, use a structure to express the channel
layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of this function.
Fixes: ecc24e72f437 ("iio: adc: Add TI ADS1015 ADC driver support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501170121.512209-9-jic23@kernel.org
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1 instance found using coccicheck script under review at:
https://lore.kernel.org/lkml/20210427141946.2478411-1-Julia.Lawall@inria.fr/
The other instance changed did not check for failure of the
pm_runtime_get_sync() so that is added.
Note the remaining pm_runtime_get_sync() call is left alone because it
is not obvious what to do on failure to power up in remove()
This is a prequel to taking a closer look at the runtime pm in IIO drivers
in general.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20210509113354.660190-29-jic23@kernel.org
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Found using coccicheck script under review at:
https://lore.kernel.org/lkml/20210427141946.2478411-1-Julia.Lawall@inria.fr/
This is a prequel to taking a closer look at the runtime pm in IIO drivers
in general.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20210509113354.660190-16-jic23@kernel.org
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Found using coccicheck script under review at:
https://lore.kernel.org/lkml/20210427141946.2478411-1-Julia.Lawall@inria.fr/
This is a prequel to taking a closer look at the runtime pm in IIO drivers
in general.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20210509113354.660190-15-jic23@kernel.org
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MODULE_DEVICE_TABLE is used to extract the device information out of the
driver and builds a table when being compiled. If using this macro,
kernel can find the driver if available when the device is plugged in,
and then loads that driver and initializes the device.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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When devm_ioremap_resource() fails, a clear enough error message will be
printed by its subfunction __devm_ioremap_resource(). The error
information contains the device name, failure cause, and possibly resource
information.
Therefore, remove the error printing here to simplify code and reduce the
binary size.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Continuing from Alexandru Ardelean's introduction of the split between
driver modifiable fields and those that should only be set by the core.
This could have been done in two steps to make the actual move after
introducing iio_device_id() but there seemed limited point to that
given how mechanical the majority of the patch is.
Includes fixup from Alex for missing mxs-lradc-adc conversion.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210426174911.397061-2-jic23@kernel.org
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Already set to same value in devm_iio_device_alloc()
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210426170251.351957-6-jic23@kernel.org
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Already set to the same value in devm_iio_device_alloc()
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Gene Chen <gene_chen@richtek.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210426170251.351957-5-jic23@kernel.org
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This is already set to the same value in devm_iio_device_alloc()
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Saravanan Sekar <sravanhome@gmail.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210426170251.351957-4-jic23@kernel.org
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Basically the TI TSC2046 touchscreen controller is 8 channel ADC optimized for
the touchscreen use case. By implementing it as an IIO ADC device, we can
make use of resistive-adc-touch and iio-hwmon drivers.
Polled readings are currently not implemented to keep this patch small, so
iio-hwmon will not work out of the box for now.
So far, this driver was tested with a custom version of resistive-adc-touch driver,
since it needs to be extended to make use of Z1 and Z2 channels. The X/Y
are working without additional changes.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210428073208.19570-4-o.rempel@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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W=1 highlights these two cases that are obviously not in kernel-doc
format.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
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Not all of the parts supported by this driver use single supply.
Hence we add chip_info fields to say what additional supplies exist
and in the case of vref, ensure that is used for the reference voltage
rather than vcc.
One corner case is the ad7091r which has an internal reference that
can be over-driven by an external reference connected on the vref pin.
To handle that force_ext_vref is introduced and set if an optional
vref regulator is present.
Tested using really simple QEMU model and some fixed regulators.
The devm_add_action_or_reset() callback is changed to take the
regulator as it's parameter so we can use one callback for all the
different regulators without having to store pointers to them in
the iio_priv() structure.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210425163154.73209-2-jic23@kernel.org
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Use devm_add_action_or_reset() instead of devres_alloc() and
devres_add(), which works the same. This will simplify the
code. There is no functional changes.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/1617881896-3164-2-git-send-email-yangyicong@hisilicon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Enable ADC on Intel Galileo Gen 1 board.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210412131835.70212-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The initialization of 'ret' variable in probe function is shortly after
overwritten. This initialization is simply not used.
Addresses-Coverity: Unused value
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20210410164728.8096-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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This change fixes a corner-case, where for a zero regulator value, the
driver would exit early, initializing the driver only partially.
The driver would be in an unknown state.
This change reworks the code to check regulator_voltage() return value
for negative (error) first, and return early. This is the more common
idiom.
Also, this change is removing the 'voltage_uv' variable and using the 'ret'
value directly. The only place where 'voltage_uv' is being used is to
compute the internal reference voltage, and the type of this variable is
'int' (same are for 'ret'). Using only 'ret' avoids having to assign it on
the error path.
Fixes: ab0afa65bbc7 ("staging: iio: adc: ad7192: fail probe on get_voltage")
Cc: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <Stable@vger.kernel.org>
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Found by inspection.
If the internal clock source is being used, the driver doesn't
call clk_prepare_enable() and as such we should not call
clk_disable_unprepare()
Use the same condition to protect the disable path as is used
on the enable one. Note this will all get simplified when
the driver moves over to a full devm_ flow, but that would make
backporting the fix harder.
Fix obviously predates move out of staging, but backporting will
become more complex (and is unlikely to happen), hence that patch
is given in the fixes tag.
Alexandru's sign off is here because he added this patch into
a larger series that Jonathan then applied.
Fixes: b581f748cce0 ("staging: iio: adc: ad7192: move out of staging")
Cc: Alexandru Tachici <alexandru.tachici@analog.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Cc: <Stable@vger.kernel.org>
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Channel numbering must start at 0 and then not have any holes, or
it is possible to overflow the available storage. Note this bug was
introduced as part of a fix to ensure we didn't rely on the ordering
of child nodes. So we need to support arbitrary ordering but they all
need to be there somewhere.
Note I hit this when using qemu to test the rest of this series.
Arguably this isn't the best fix, but it is probably the most minimal
option for backporting etc.
Alexandru's sign-off is here because he carried this patch in a larger
set that Jonathan then applied.
Fixes: d7857e4ee1ba6 ("iio: adc: ad7124: Fix DT channel configuration")
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Cc: <Stable@vger.kernel.org>
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