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Author SHA1 Message Date
Lars-Peter Clausen
2906867da4 iio: ad7768-1: Call iio_trigger_notify_done() on error 
commit 6661146427 upstream.

IIO trigger handlers must call iio_trigger_notify_done() when done. This
must be done even when an error occurred. Otherwise the trigger will be
seen as busy indefinitely and the trigger handler will never be called
again.

The ad7768-1 driver neglects to call iio_trigger_notify_done() when there
is an error reading the converter data. Fix this by making sure that
iio_trigger_notify_done() is included in the error exit path.

Fixes: a5f8c7da3d ("iio: adc: Add AD7768-1 ADC basic support")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101144055.13858-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2021-12-14 10:57:21 +01:00
Alexandru Ardelean
49bd77560f iio: adc: remove unused private data assigned with spi_set_drvdata() 
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>
 2021-06-13 17:00:17 +01:00
Greg Kroah-Hartman
6771fb0b94 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.
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Merge tag 'iio-for-5.14a' of 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
  ...
 2021-06-09 12:11:49 +02:00
Jonathan Cameron
a1caeebab0 iio: adc: ad7768-1: Fix too small buffer passed to 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: a5f8c7da3d ("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>
 2021-05-22 08:32:36 +01:00
Jonathan Cameron
15ea2878bf iio: core: move @id from struct iio_dev to struct iio_dev_opaque 
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
 2021-05-17 13:49:13 +01:00
Gwendal Grignou
8a22522016 iio: fix devm_iio_trigger_alloc with parent.cocci 
Use cocci semantic patch:
@@
expression trigger, P;
@@
   trigger = devm_iio_trigger_alloc(P, ...);
   ...
-  trigger->dev.parent = P;

To remove trigger->dev.parent, since it is set by default.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210309193620.2176163-3-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2021-03-25 19:13:50 +00:00
Cristian Pop
75ed0be720 iio: adc: ad7768-1: Add channel labels. 
For better identification of the channels.

Signed-off-by: Cristian Pop <cristian.pop@analog.com>
Link: https://lore.kernel.org/r/20200928090959.88842-3-cristian.pop@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2020-11-08 16:07:39 +00:00
Lars-Peter Clausen
f11d59d87b iio: Move attach/detach of the poll func to the core 
All devices using a triggered buffer need to attach and detach the trigger
to the device in order to properly work. Instead of doing this in each and
every driver by hand move this into the core.

At this point in time, all drivers should have been resolved to
attach/detach the poll-function in the same order.

This patch removes all explicit calls of iio_triggered_buffer_postenable()
& iio_triggered_buffer_predisable() in all drivers, since the core handles
now the pollfunc attach/detach.

The more peculiar change is for the 'at91-sama5d2_adc' driver, since it's
not immediately obvious that removing the hooks doesn't break anything.
Eugen was able to test on at91-sama5d2-adc driver, sama5d2-xplained board.
All seems to be fine.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Tested-by: Eugen Hristev <eugen.hristev@microchip.com> #for at91-sama5d2-adc
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2020-06-20 17:34:44 +01:00
Alexandru Ardelean
d3be83244c iio: remove explicit IIO device parent assignment 
This patch applies the semantic patch:
@@
expression I, P, SP;
@@
   I = devm_iio_device_alloc(P, SP);
   ...
-  I->dev.parent = P;

It updates 302 files and does 307 deletions.
This semantic patch also removes some comments like
'/* Establish that the iio_dev is a child of the i2c device */'

But this is is only done in case where the block is left empty.

The patch does not seem to cover all cases. It looks like in some cases a
different variable is used in some cases to assign the parent, but it
points to the same reference.
In other cases, the block covered by ... may be just too big to be covered
by the semantic patch.

However, this looks pretty good as well, as it does cover a big bulk of the
drivers that should remove the parent assignment.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2020-06-14 11:49:59 +01:00
Stefan Popa
e9517dffd1 iio: adc: ad7768-1: Add support for setting the sampling frequency 
The AD7768-1 core ADC receives a master clock signal (MCLK). The MCLK
frequency combined with the MCLK division and the digital filter
decimation rates, determines the sampling frequency. Along with
MCLK_DIV, the power mode is also configured according to datasheet
recommendations.

From user space, available sampling frequencies can be read. However,
it is not required for an exact value to be entered, since the driver
will look for the closest available match.

When the device configuration changes (for example, if the filter
decimation rate changes), a SYNC_IN pulse is required.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2019-02-09 18:46:01 +00:00
Stefan Popa
a5f8c7da3d iio: adc: Add AD7768-1 ADC basic support 
The ad7768-1 is a single channel, precision 24-bit analog to digital
converter (ADC).

This basic patch configures the device in fast mode, with 32 kSPS and
leaves the default sinc5 filter.

Two data conversion modes are made available. When data is retrieved by
using the read_raw attribute, one shot single conversion mode is set.
The continuous conversion mode is enabled when the triggered buffer
mechanism is used. To assure correct data retrieval, the driver waits
for the interrupt triggered by the low to high transition of the DRDY
pin.

Datasheets:
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7768-1.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2019-02-02 10:28:56 +00:00