iio: adc: da9150-gpadc: convert probe to full-device managed

This change converts the probe of this driver to use device-managed
functions only, which means that the remove hook can be removed.
The remove hook has only 2 calls to iio_device_unregister() and
iio_map_array_unregister(). Both these can now be done via devm register
functions, now that there's also a devm_iio_map_array_register() function.

The platform_set_drvdata() can also be removed now.

This change also removes the error print for when the iio_device_register()
call fails. This isn't required now.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210903072917.45769-6-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: lp8788_adc: convert probe to full-device managed

This change converts the probe of this driver to use device-managed
functions only, which means that the remove hook can be removed.
The remove hook has only 2 calls to iio_device_unregister() and
iio_map_array_unregister(). Both these can now be done via devm register
functions, now that there's also a devm_iio_map_array_register() function.

The platform_set_drvdata() can also be removed now.

This change also removes the error print for when the iio_device_register()
call fails. This isn't required now.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210903072917.45769-5-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: axp288_adc: convert probe to full device-managed

This change converts the probe of this driver to use device-managed
functions only, which means that the remove hook can be removed.
The remove hook has only 2 calls to iio_device_unregister() and
iio_map_array_unregister(). Both these can now be done via devm register
functions, now that there's also a devm_iio_map_array_register() function.

The platform_set_drvdata() can also be removed now.

This change also removes the error print for when the iio_device_register()
call fails. This isn't required now.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210903072917.45769-4-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: intel_mrfld_adc: convert probe to full device-managed

The only call in the remove hook is the iio_map_array_unregister() call.
Since we have a devm_iio_map_array_register() function now, we can use that
and remove the remove hook entirely.
The IIO device was registered with the devm_iio_device_register() prior to
this change.

Also, the platform_set_drvdata() can be removed now, since it was used only
in the remove hook.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210903072917.45769-3-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: inkern: introduce devm_iio_map_array_register() short-hand function

This change introduces a device-managed variant to the
iio_map_array_register() function. It's a simple implementation of calling
iio_map_array_register() and registering a callback to
iio_map_array_unregister() with the devm_add_action_or_reset().

The function uses an explicit 'dev' parameter to bind the unwinding to. It
could have been implemented to implicitly use the parent of the IIO device,
however it shouldn't be too expensive to callers to just specify to which
device object to bind this unwind call.
It would make the API a bit more flexible.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210903072917.45769-2-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: fsl-imx25-gcq: initialize regulators as needed

The driver tries to initialize all possible regulators from the DT, then
match the external regulators with each channel and then release all unused
regulators.

We can change the logic a bit to initialize regulators only when at least
one channel needs them.

This change creates a mx25_gcq_ext_regulator_setup() function that is
called only for the external regulators. If there's already a reference to
an external regulator, the function will just exit early with no error.

This way, the driver doesn't need to keep any track of these regulators
during init.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210625074325.9237-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: imu: st_lsm6dsx: move max_fifo_size in st_lsm6dsx_fifo_ops

Move max_fifo_size in st_lsm6dsx_fifo_ops in order to have all
FIFO configuration parameters in st_lsm6dsx_fifo_ops structure.
This patch does not introduce any logic change, just small code
rearrangement.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/3262ad9d9d1497e19ea1bab208c495c2b9a98994.1632664866.git.lorenzo@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Don't reject external triggers when there is no IRQ

External triggers do not necessarily need the EOC interrupt to be
populated to work properly. The end of conversion status may either come
from an interrupt or from a sufficient enough extra delay. IRQs are not
mandatory so move the triggered buffer setup out of the IRQ condition
and add the logic to wait enough time for all the requested conversions
to be in the device's FIFO.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-17-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Allow all kind of triggers to be used

There is no reason to limit this driver to its internal trigger. The
only difference being, when using an external trigger, the sample
conversion must be manually started.

Drop the ->validate_trigger() hook in order to allow other triggers to
be bound.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-16-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Use the EOC IRQ when populated for single reads

So far the End-Of-Conversion interrupt was only used in conjunction with
the internal trigger to process the data. Let's extend the use of this
interrupt handler to support regular single-shot conversions as well.

Doing so requires writing our own hard IRQ handler. This handler has to
check if buffers are enabled or not:

*** Buffers disabled condition ***

  This means the user requested a single conversion and the sample is
  ready to be retrieved.

    -> This implies adding the relevant completion boilerplate.

*** Buffers enabled condition ***

  Triggers are used. So far there is only support for the internal
  trigger but this trigger might soon be attached to another device as
  well so it is the core duty to decide which handler to call in order
  to process the data. The core will decide to either:

  * Call the internal trigger handler which will extract the data that
    is already present in the ADC FIFOs

  or

  * Call the trigger handler of another driver when using this trigger
    with another device, even though this call will be slightly delayed
    by the fact that the max1027 IRQ is a data-ready interrupt rather
    than a real trigger:

  -> The new handler will manually inform the core about the trigger
     having transitioned by directly calling iio_trigger_poll() (which
     iio_trigger_generic_data_rdy_poll() initially did).

In order for the handler to be "source" agnostic, we also need to change
the private pointer and provide the IIO device instead of the trigger
object.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-15-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Stop requesting a threaded IRQ

The threaded handler is not populated, this means there is nothing
running in process context so let's switch to the regular
devm_request_irq() call instead.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-14-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Introduce an end of conversion helper

For now this helper only waits for the maximum duration of a single
conversion.

In practice, a "temperature measurement" will take twice this
time because it will also carry another analog conversion but as here we
will only care about the temperature conversion which happens first, we
can still only wait for a single sample and get the right data.

This helper will soon be improved to properly handle the end of
conversion interrupt as well as a higher number of samples.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-13-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Separate the IRQ handler from the read logic

Create a max1027_read_scan() helper which will make clearer the future IRQ
handler updates (no functional change).

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-12-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Prevent single channel accesses during buffer reads

When hardware buffers are enabled (the cnvst pin being the trigger), one
should not mess with the device state by requesting a single channel
read.

There is already a iio_buffer_enabled() check in *_read_single_value()
to merely prevent this situation but the check is inconsistent since
buffers can be enabled after the if clause anyway. Instead, use the core
mutex by calling iio_device_claim/release_direct_mode().

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-11-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Create a helper to configure the channels to scan

These bits are meant to be reused for triggered buffers setup.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-10-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Ensure a default cnvst trigger configuration

We don't expect the (hardware) cnvst trigger to be enabled at boot time,
this is a user choice made in sysfs and there is a dedicated callback to
enable/disable this trigger. Hence, we can just ensure it is disabled in
the probe at initialization time and then assume that whenever a
->read_raw() call happens, the trigger has been disabled and conversions
will start on register write.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-9-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Simplify the _set_trigger_state() helper

The call to max1027_enable_trigger() is the same in both cases thanks to
the 'state' variable, so factorize a little bit to simplify the code and
explain why we call this helper.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-8-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Create a helper to enable/disable the cnvst trigger

There are two ways to physically trigger a conversion:
- A falling edge on the cnvst pin
- A write operation on the conversion register

Let's create a helper for this.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210921115408.66711-7-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Rename a helper

Make it clear that the *_set_trigger_state() hook is responsible for
cnvst based conversions by renaming the helper. This may avoid
confusions with software trigger support that is going to be
introduced.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210921115408.66711-6-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Minimize the number of converted channels

Provide a list of ->available_scan_masks which match the device's
capabilities. Basically, these devices are able to scan from 0 to N, N
being the highest voltage channel requested by the user. The temperature
can be included or not, but cannot be retrieved alone.

The consequence is, instead of reading and pushing to the IIO buffers
all channels each time, the "minimum" number of channels will be scanned
and pushed based on the ->active_scan_mask.

For example, if the user wants channels 1, 4 and 5, all channels from
0 to 5 will be scanned and pushed to the IIO buffers. The core will then
filter out the unneeded samples based on the ->active_scan_mask that has
been selected and only channels 1, 4 and 5 will be available to the user
in the shared buffer.

Provide a comment in the code explaining this logic.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-5-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Drop useless debug messages

These two debug messages bring absolutely no value, let's drop them.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-4-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Drop extra warning message

Memory allocation errors automatically trigger the right logs, no need
to have our own.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210921115408.66711-3-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: max1027: Fix style

Follow checkpatch.pl's main advices before hacking into the driver, mainly:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
WARNING: Prefer 'unsigned int *' to bare use of 'unsigned *'
CHECK: Comparison to NULL could be written "!foo"
CHECK: Alignment should match open parenthesis

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-2-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

MAINTAINERS: Add the driver info of the NXP IMX8QXP

The NXP i.MX 8QuadXPlus SOC has a new ADC IP. After adding
the driver support for it, I add the driver info of the
NXP IMX8QXP ADC to MAINTAINERS file.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210925020555.129-4-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: adc: Add binding documentation for NXP IMX8QXP ADC

The NXP i.MX 8QuadXPlus SOC a new ADC IP, so add
binding documentation for NXP IMX8QXP ADC.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210925020555.129-3-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: imx8qxp-adc: Add driver support for NXP IMX8QXP ADC

The NXP i.MX 8QuadXPlus SOC has a new ADC IP, so add
driver support for this ADC.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210925020555.129-2-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: fxls8962af: add wake on event

This adds ways for the SoC to wake from accelerometer wake events.

In the suspend function we skip disabling the sensor if wakeup-source
and events are activated.

If buffered reads are enabled they will be deactivated before suspend.
As the onboard buffer is only holding up to 32 12-bit X/Y/Z data
triplets.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210920114221.1595543-2-sean@geanix.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: fxls8962af: add threshold event handling

Add event channels that control the creation of motion events.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Link: https://lore.kernel.org/r/20210920114221.1595543-1-sean@geanix.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Get and set trimming data.

The ADC controller has a trimming register for fine-tune the reference
voltage. The trimming value comes from the OTP register which will be
written during chip production. This patch will read this OTP value and
configure it to the ADC register when the ADC controller probes and using
dts property "aspeed,trim-data-valid" to determine whether to execute this
flow.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-12-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Support battery sensing.

In ast2600, ADC integrate dividing circuit at last input channel for
battery sensing. This patch use the dts property "battery-sensing" to
enable this feature makes the last channel of each adc can tolerance
higher voltage than reference voltage. The offset interface of ch7 will
be separated when enabling the battery sensing mode.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-11-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Add compensation phase.

This patch adds a compensation phase to improve the accuracy of ADC
measurement. This is the built-in function through input half of the
reference voltage to get the ADC offset.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-10-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Add func to set sampling rate.

Add the function to set the sampling rate and keep the sampling period
for a driver used to wait the fresh value.
In addition, since the ADC clock is required when initializing the ADC
device, move clk_prepare_enable ahead of the initialization phase.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-9-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Fix the calculate error of clock.

The ADC clock formula is
ast2400/2500:
ADC clock period = PCLK * 2 * (ADC0C[31:17] + 1) * (ADC0C[9:0] + 1)
ast2600:
ADC clock period = PCLK * 2 * (ADC0C[15:0] + 1)
They all have one fixed divided 2 and the legacy driver didn't handle it.
This patch register the fixed factory clock device as the parent of ADC
clock scaler to fix this issue.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-8-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Support ast2600 adc.

Make driver to support ast2600 adc device.
- Use shared reset controller
- Complete the vref configure function
- Add the model data for ast2600 adc

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-7-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Use devm_add_action_or_reset.

This patch use devm_add_action_or_reset to handle the error in probe
phase.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-6-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Use model_data to set clk scaler.

This patch uses need_prescaler and scaler_bit_width to set the ADC clock
scaler.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-5-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Add vref config function

Add the function to check the vref_fixed_mv and set the value to driver
data.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-4-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Restructure the model data

This patch refactors the model data structure to distinguish the
function form different versions of aspeed ADC.
- Rename the vref_voltage to vref_fixed_mv and add vref_mv driver data
When driver probe will check vref_fixed_mv value and store it to vref_mv
which isn't const value.
- Add num_channels
Make num_channles of iio device can be changed by different model_data
- Add need_prescaler flag and scaler_bit_width
The need_prescaler flag is used to tell the driver the clock divider needs
another Prescaler and the scaler_bit_width to set the clock divider
bitfield width.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-3-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: Keep model data to driver data.

Keep the model data pointer to driver data for reducing the usage of
of_device_get_match_data().

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-2-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ABI: Document in_concentration_co2_scale

Document the 'in_concentration_co2_scale' standard IIO attribute.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Link: https://lore.kernel.org/r/20210920135413.140310-5-jacopo+renesas@jmondi.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: chemical: Add Senseair Sunrise 006-0-007 driver

Add support for the Senseair Sunrise 006-0-0007 driver through the
IIO subsystem.

Datasheet: https://rmtplusstoragesenseair.blob.core.windows.net/docs/Dev/publicerat/TDE5531.pdf
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Link: https://lore.kernel.org/r/20210920135413.140310-4-jacopo+renesas@jmondi.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ABI: docs: Document Senseair Sunrise ABI

Add documentation for the sysfs attributes of the sunrise_co2 driver.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Link: https://lore.kernel.org/r/20210920135413.140310-3-jacopo+renesas@jmondi.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: chemical: Document senseair,sunrise CO2 sensor

Add documentation for the Senseair Sunrise 006-0-0007 CO2 NDIR sensor.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210920135413.140310-2-jacopo+renesas@jmondi.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: magnetometer: asahi-kasei,ak8975 add vid reg

Driver and device-tree also use vid-supply regulator.

Fixes: 7e000fbff7a0 ("dt-bindings: iio: magnetometer: ak8975: convert format to yaml, add maintainer")
Signed-off-by: David Heidelberg <david@ixit.cz>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210913181949.83179-1-david@ixit.cz
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: kionix,kxcjk1013: driver support interrupts

Device has interrupts support, which description was missing in the bindings.

Signed-off-by: David Heidelberg <david@ixit.cz>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210919203656.119742-1-david@ixit.cz
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: exynos: describe drivers in KConfig

Describe better which driver applies to which SoC, to make configuring
kernel for Samsung SoC easier.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210924133515.112357-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: rockchip_saradc: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210908105631.1474-1-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: dac: stm32-dac: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210908105638.1525-1-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: mma7660: Mark acpi match table as maybe unused

When building kernels without ACPI support the table is declared
but is not used because ACPI_PTR() turns it into a NULL.

Add the __maybe_unused attribute to stop the compiler whining.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Link: https://lore.kernel.org/r/20210919072616.3849723-1-daniel@0x0f.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: light: max44000: use device-managed functions in probe

This is a simple conversion. Both iio_device_register() and
iio_triggered_buffer_setup() functions have device-managed variants.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210913120002.306280-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: gyro: adis16080: use devm_iio_device_register() in probe

There is nothing else that needs to be done for this driver. The remove
hook calls only the iio_device_unregister() hook.

So this driver can use devm_iio_device_register() directly.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210913115308.301877-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: dac: ad5064: convert probe to full device-managed

This change converts the probe of the AD5064 driver to use only
device-managed functions.

The regulator_bulk_disable() is passed on a devm_add_action_or_reset() hook
and the devm_iio_device_register() can be used to register the IIO device.

The driver has both I2C and SPI hooks inside, so all these can be removed.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210913115237.301310-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

staging: iio: ad9832: convert probe to device-managed

This change does a conversion of the driver to use device-managed init
functions. The 2 regulators and the clock inits are converted to use
devm_add_action_or_reset() callbacks for de-initializing them when the
driver unloads.

And finally the devm_iio_device_register() function can be use to register
the device.

The remove hook can finally be removed and the spi_set_drvdata() call can
also be removed as the private data is no longer used.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210913115209.300665-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: dac: ad7303: convert probe to full device-managed

For this conversion, the regulators need to have some cleanup hooks
registered with devm_add_action_or_reset() and then the
devm_io_device_register() call can be used.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210913115121.300082-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: imu: inv_mpu6050: Mark acpi match table as maybe unused

When building kernels without ACPI support the table is declared
but is not used because ACPI_PTR() turns it into a NULL.

Add the __maybe_unused attribute to stop the compiler whining.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Acked-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Link: https://lore.kernel.org/r/20210913112913.2148026-1-daniel@0x0f.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ep93xx: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210908105646.1576-1-caihuoqing@baidu.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: adxl355: Add triggered buffer support

Provide a way for continuous data capture by setting up buffer support. The
data ready signal exposed at the DRDY pin of the ADXL355 is exploited as
a hardware interrupt which triggers to fill the buffer.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20210903184312.21009-3-puranjay12@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: adxl355: use if(ret) in place of ret < 0

Replace if(ret < 0) with if(ret) for consistency.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20210903184312.21009-2-puranjay12@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: Add driver support for ADXL313

ADXL313 is a small, thin, low power, 3-axis accelerometer with high
resolution measurement up to +/-4g. It includes an integrated 32-level
FIFO and has activity and inactivity sensing capabilities.

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/d16e2d1967e46bb2b1024b6d23bc4889da77dc6b.1630523106.git.lucas.p.stankus@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: accel: Add binding documentation for ADXL313

Add device tree binding documentation for ADXL313 3-axis accelerometer.

Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/2eff22d1d22f7e72efdabdc681d02e922682c434.1630523106.git.lucas.p.stankus@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: aspeed: completes the bitfield declare.

This patch completes the declare of ADC register bitfields and uses the
same prefix ASPEED_ADC_* for these bitfields. In addition, tidy up space
alignment of the codes.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210831071458.2334-4-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: adc: Add ast2600-adc bindings

Add device tree bindings document for the aspeed ast2600 adc device
driver.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210831071458.2334-3-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: ti-ads8344: convert probe to device-managed

This change converts the driver to register via devm_iio_device_register().
The regulator disable is moved on a devm_add_action_or_reset() hook.

And the spi_set_drvdata() isn't required anymore.
And finally, the ads8344_remove() can be removed as well.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210903073707.46892-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: update copyright and authors information

Update copyright and authors information (corrected e-mail address), and
add myself as one of the authors.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-9-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: add support for sama7g5 device

Add support to sama7g5 ADC which is similar with sama5d2/sam9x60 device.
Differences are highlighted by compatible.
Main differences include 16 channels instead of 12 and missing
resistive touchscreen.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-8-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: add helper for COR register

Add helper for the COR register. This helper allows to modify the COR
register, removes duplicate code and improves readability.
The COR offset is now part of the register layout. This will allow
different platform with a different offset to use the same helper.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-7-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: add support for separate end of conversion registers

Some platforms have separated the end-of-conversion information from the
usual ISR/IMR/IER/IDR registers, into EOC_ISR/EOC_IMR/EOC_IER/EOC_IDR.
To cope with both variants, helpers are being added, that will make
code more clear and more easy to read.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-6-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: convert to platform specific data structures

Convert the driver to platform specific structures. This means:
- create a register layout struct that will hold offsets for registers
- create a platform struct that will hold platform information (number of
channels, indexes for different channels and pointer to layout struct)
- convert specific macros that are platform dependent into platform variables

This step is in fact a no-op, but allows the driver to be more flexible
and for future enhancement including adding new platforms that are partly
compatible with the current driver and differ slightly in register layout
or capabilities for example.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-5-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: remove unused definition

Remove unused register definition

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-4-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: at91-sama5d2_adc: initialize hardware after clock is started

The hw_init hardware init call must happen after the clock is prepared and
enabled. Otherwise, writing to the registers might lead to a block or
external abort.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-3-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: adc: at91-sama5d2: add compatible for sama7g5-adc

Add compatible for microchip,sama7g5-adc device.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-2-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: magnetometer: ak8975: add AK09116 support

Add additional AK09116 to the magnetometer driver which has the same
register mapping and scaling as the AK09112 device.

Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20210825020738.35877-1-matt.ranostay@konsulko.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: temperature: add MAXIM max31865 support

Add DT bindings for MAXIM max31865 RTD sensor.

Signed-off-by: Navin Sankar Velliangiri <navin@linumiz.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210824050650.72619-1-navin@linumiz.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: temperature: Add MAX31865 RTD Support

This patch adds support for Maxim MAX31865 RTD temperature
sensor support.

More information can be found in:
https://datasheets.maximintegrated.com/en/ds/MAX31865.pdf

Signed-off-by: Navin Sankar Velliangiri <navin@linumiz.com>
Link: https://lore.kernel.org/r/20210824050123.71289-1-navin@linumiz.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: twl6030-gpadc: Use the defined variable to clean code

Use the defined variable "dev" to make the code cleaner.

Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20210823095921.16828-1-tangbin@cmss.chinamobile.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

staging: iio: cdc: remove braces from single line if blocks

Remove braces from single line if blocks to clear checkpatch warnings.
WARNING: braces {} are not necessary for single statement blocks

Signed-off-by: Alexander Vorwerk <alec@vc-celle.de>
Link: https://lore.kernel.org/r/20210820224914.1260-1-alec@vc-celle.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ltc2983: fail probe if no channels are given

If there are no channels defined in the devicetree, there's no point in
probing the device. We were actually requesting a zero sized 'kmalloc'
array but since we were not touching the ZERO_SIZE_PTR afterwards,
nothing bad was actually happening. Hence this is not really a fix but
rather an improvement.

Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210825084149.11587-2-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ltc2983: add support for optional reset gpio

Check if an optional reset gpio is present and if so, make sure to reset
the device.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210825084149.11587-1-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: ad5770r: make devicetree property reading consistent

The bindings file for this driver is defining the property as 'reg' but
the driver was reading it with the 'num' name. The bindings actually had
the 'num' property when added in
commit ea52c21268e6 ("dt-bindings: iio: dac: Add docs for AD5770R DAC")
and then changed it to 'reg' in
commit 2cf3818f18b2 ("dt-bindings: iio: dac: AD5570R fix bindings errors").
However, both these commits landed in v5.7 so the assumption is
that either 'num' is not being used or if it is, the validations were not
done.

Anyways, if someone comes back yelling about this, we might just support
both of the properties in the future. Not ideal, but that's life...

Fixes: 2cf3818f18b2 ("dt-bindings: iio: dac: AD5570R fix bindings errors")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210818080525.62790-1-nuno.sa@analog.com
Cc: Stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: gyro: remove dead config dependencies on INPUT_MPU3050

Commit b1fe0cf06f92 ("Input: delete MPU3050 driver") deletes the superseded
MPU3050 driver and its corresponding config INPUT_MPU3050.

The dependencies on the superseding driver in ./drivers/iio/gyro/Kconfig
to ensure that the two drivers are not built into the same kernel is a dead
dependency and not required anymore.

So, remove those config dependencies on INPUT_MPU3050 for MPU3050_I2C.

This issue was detected with ./scripts/checkkconfigsymbols.py.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210817081330.9645-1-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: st_sensors: remove reference to parent device object on st_sensor_data

The idea behind it, is that all devm_ calls in ST sensors are bound to the
parent device object.

However, the reference to that object is kept on both the st_sensor_data
struct and the IIO object parent (indio_dev->dev.parent).

This change only adds a bit consistency and uses the reference stored on
indio_dev->dev.parent, to enforce the assumption that all ST sensors' devm_
calls are bound to the same reference as the one store on st_sensor_data.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210823112204.243255-6-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: st_sensors: remove all driver remove functions

At this point all ST driver remove functions do iio_device_unregister().
This change removes them from them and replaces all iio_device_register()
with devm_iio_device_register().

This can be done in a single change relatively easy, since all these remove
functions are define in st_sensors.h.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210823112204.243255-5-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: st_sensors: remove st_sensors_power_disable() function

This change converts the st_sensors_power_enable() function to use
devm_add_action_or_reset() handlers to register regulator_disable hooks for
when the drivers get unloaded.

The parent device of the IIO device object is used. This is based on the
assumption that all other devm_ calls in the ST sensors use this reference.

This makes the st_sensors_power_disable() un-needed.
Removing this also changes unload order a bit, as all ST drivers would call
st_sensors_power_disable() first and iio_device_unregister() after that.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210823112204.243255-4-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: st_sensors: remove st_sensors_deallocate_trigger() function

This change converts the st_sensors_allocate_trigger() to use
device-managed functions.

The parent device of the IIO device object is used. This is based on the
assumption that all other devm_ calls in the ST sensors use this reference.

That makes the st_sensors_deallocate_trigger() function un-needed, so it
can be removed.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210823112204.243255-3-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: st_sensors: disable regulators after device unregistration

Up until commit ea7e586bdd331 ("iio: st_sensors: move regulator retrieveal
to core") only the ST pressure driver seems to have had any regulator
disable. After that commit, the regulator handling was moved into the
common st_sensors logic.

In all instances of this regulator handling, the regulators were disabled
before unregistering the IIO device.
This can cause issues where the device would be powered down and still be
available to userspace, allowing it to send invalid/garbage data.

This change moves the st_sensors_power_disable() after the common probe
functions. These common probe functions also handle unregistering the IIO
device.

Fixes: 774487611c949 ("iio: pressure-core: st: Provide support for the Vdd power supply")
Fixes: ea7e586bdd331 ("iio: st_sensors: move regulator retrieveal to core")
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Denis CIOCCA <denis.ciocca@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210823112204.243255-2-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: ad7949: use devm managed functions

Switch to devm_iio_device_register to finalize devm migration.
This removes the use for iio_device_unregister() and since
mutex_destroy() is not necessary here, remove it altogether.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Link: https://lore.kernel.org/r/20210815213309.2847711-6-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: adc: ad7949: update voltage reference bindings

Update bindings to describe support for buffered and unbuffered external
voltage references selection, and add adi,internal-ref-microvolt for
internal voltage reference selection.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210815213309.2847711-5-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: ad7949: add vref selection support

Add support for selecting the voltage reference from the devicetree.

This change is required to get valid readings with all three
vref hardware configurations supported by the ADC.

For instance if the ADC isn't provided with an external reference,
the sample request must specify an internal voltage reference to get a
valid reading.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Link: https://lore.kernel.org/r/20210815213309.2847711-4-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: ad7949: enable use with non 14/16-bit controllers

This driver supports devices with 14-bit and 16-bit sample sizes.
This implies different SPI transfer lengths which are not always handled
properly by some SPI controllers.

To work around this limitation, define a big endian buffer used to split
the buffer into two 8-bit messages in the event that the controller
doesn't support 14-bit or 16-bit transfers.
A separate buffer is introduced here to avoid performing operations on
types of different endianness.

Since all transfers use the same bits_per_word value, move that logic to
the probe function, and let transfers default to the value defined in
the struct spi_device.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Link: https://lore.kernel.org/r/20210815213309.2847711-3-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: adc: ad7949: define and use bitfield names

Replace raw configuration register values by using FIELD_PREP and
defines to improve readability.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Link: https://lore.kernel.org/r/20210815213309.2847711-2-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio: Remove all strcpy() uses

strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors. So, remove all the uses and add
devm_kstrdup() or devm_kasprintf() instead.

Also, modify the "for" loop conditions to clarify the access to the
st->orientation.rotation buffer.

This patch is an effort to clean up the proliferation of str*()
functions in the kernel and a previous step in the path to remove
the strcpy function from the kernel entirely [1].

[1] https://github.com/KSPP/linux/issues/88

Signed-off-by: Len Baker <len.baker@gmx.com>
Link: https://lore.kernel.org/r/20210815174204.126593-1-len.baker@gmx.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: Add driver support for ADXL355

ADXL355 is a 3-axis MEMS Accelerometer. It offers low noise density,
low 0g offset drift, low power with selectable measurement ranges.
It also features programmable high-pass and low-pass filters.

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adxl354_adxl355.pdf
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20210811073027.124619-3-puranjay12@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

dt-bindings: iio: accel: Add DT binding doc for ADXL355

Add devicetree binding document for ADXL355, a 3-Axis MEMS Accelerometer.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210811073027.124619-2-puranjay12@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Linux 5.15-rc1

Merge tag 'perf-tools-for-v5.15-2021-09-11' of git://git./linux/kernel/git/acme/linux

Pull more perf tools updates from Arnaldo Carvalho de Melo:

 - Add missing fields and remove some duplicate fields when printing a
   perf_event_attr.

 - Fix hybrid config terms list corruption.

 - Update kernel header copies, some resulted in new kernel features
   being automagically added to 'perf trace' syscall/tracepoint argument
   id->string translators.

 - Add a file generated during the documentation build to .gitignore.

 - Add an option to build without libbfd, as some distros, like Debian
   consider its ABI unstable.

 - Add support to print a textual representation of IBS raw sample data
   in 'perf report'.

 - Fix bpf 'perf test' sample mismatch reporting

 - Fix passing arguments to stackcollapse report in a 'perf script'
   python script.

 - Allow build-id with trailing zeros.

 - Look for ImageBase in PE file to compute .text offset.

* tag 'perf-tools-for-v5.15-2021-09-11' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (25 commits)
  tools headers UAPI: Update tools's copy of drm.h headers
  tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
  tools headers UAPI: Sync linux/fs.h with the kernel sources
  tools headers UAPI: Sync linux/in.h copy with the kernel sources
  perf tools: Add an option to build without libbfd
  perf tools: Allow build-id with trailing zeros
  perf tools: Fix hybrid config terms list corruption
  perf tools: Factor out copy_config_terms() and free_config_terms()
  perf tools: Fix perf_event_attr__fprintf() missing/dupl. fields
  perf tools: Ignore Documentation dependency file
  perf bpf: Provide a weak btf__load_from_kernel_by_id() for older libbpf versions
  tools include UAPI: Update linux/mount.h copy
  perf beauty: Cover more flags in the  move_mount syscall argument beautifier
  tools headers UAPI: Sync linux/prctl.h with the kernel sources
  tools include UAPI: Sync sound/asound.h copy with the kernel sources
  tools headers UAPI: Sync linux/kvm.h with the kernel sources
  tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
  perf report: Add support to print a textual representation of IBS raw sample data
  perf report: Add tools/arch/x86/include/asm/amd-ibs.h
  perf env: Add perf_env__cpuid, perf_env__{nr_}pmu_mappings
  ...

Merge tag 'compiler-attributes-for-linus-v5.15-rc1-v2' of git://github.com/ojeda/linux

Pull compiler attributes updates from Miguel Ojeda:

 - Fix __has_attribute(__no_sanitize_coverage__) for GCC 4 (Marco Elver)

 - Add Nick as Reviewer for compiler_attributes.h (Nick Desaulniers)

 - Move __compiletime_{error|warning} (Nick Desaulniers)

* tag 'compiler-attributes-for-linus-v5.15-rc1-v2' of git://github.com/ojeda/linux:
  compiler_attributes.h: move __compiletime_{error|warning}
  MAINTAINERS: add Nick as Reviewer for compiler_attributes.h
  Compiler Attributes: fix __has_attribute(__no_sanitize_coverage__) for GCC 4

Merge tag 'auxdisplay-for-linus-v5.15-rc1' of git://github.com/ojeda/linux

Pull auxdisplay updates from Miguel Ojeda:
 "An assortment of improvements for auxdisplay:

   - Replace symbolic permissions with octal permissions (Jinchao Wang)

   - ks0108: Switch to use module_parport_driver() (Andy Shevchenko)

   - charlcd: Drop unneeded initializers and switch to C99 style (Andy
     Shevchenko)

   - hd44780: Fix oops on module unloading (Lars Poeschel)

   - Add I2C gpio expander example (Ralf Schlatterbeck)"

* tag 'auxdisplay-for-linus-v5.15-rc1' of git://github.com/ojeda/linux:
  auxdisplay: Replace symbolic permissions with octal permissions
  auxdisplay: ks0108: Switch to use module_parport_driver()
  auxdisplay: charlcd: Drop unneeded initializers and switch to C99 style
  auxdisplay: hd44780: Fix oops on module unloading
  auxdisplay: Add I2C gpio expander example

Merge tag 'smp-urgent-2021-09-12' of git://git./linux/kernel/git/tip/tip

Pull CPU hotplug updates from Thomas Gleixner:
 "Updates for the SMP and CPU hotplug:

   - Remove DEFINE_SMP_CALL_CACHE_FUNCTION() which is a left over of the
     original hotplug code and now causing trouble with the ARM64 cache
     topology setup due to the pointless SMP function call.

     It's not longer required as the hotplug callbacks are guaranteed to
     be invoked on the upcoming CPU.

   - Remove the deprecated and now unused CPU hotplug functions

   - Rewrite the CPU hotplug API documentation"

* tag 'smp-urgent-2021-09-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Documentation: core-api/cpuhotplug: Rewrite the API section
  cpu/hotplug: Remove deprecated CPU-hotplug functions.
  thermal: Replace deprecated CPU-hotplug functions.
  drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()

Merge tag 'char-misc-5.15-rc1-lkdtm' of git://git./linux/kernel/git/gregkh/char-misc

Pull misc driver fix from Greg KH:
 "Here is a single patch for 5.15-rc1, for the lkdtm misc driver.

  It resolves a build issue that many people were hitting with your
  current tree, and Kees and others felt would be good to get merged
  before -rc1 comes out, to prevent them from having to constantly hit
  it as many development trees restart on -rc1, not older -rc releases.

  It has NOT been in linux-next, but has passed 0-day testing and looks
  'obviously correct' when reviewing it locally :)"

* tag 'char-misc-5.15-rc1-lkdtm' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  lkdtm: Use init_uts_ns.name instead of macros

Merge tag 'for-linus-5.15-1' of git://github.com/cminyard/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "A couple of very minor fixes for style and rate limiting.

  Nothing big, but probably needs to go in"

* tag 'for-linus-5.15-1' of git://github.com/cminyard/linux-ipmi:
  char: ipmi: use DEVICE_ATTR helper macro
  ipmi: rate limit ipmi smi_event failure message