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This loop definition automatically releases the handle on early exit
reducing the chance of bugs that cause resource leaks.
Co-developed-by: Briza Mel Dias de Sousa <brizamel.dias@usp.br>
Signed-off-by: Briza Mel Dias de Sousa <brizamel.dias@usp.br>
Signed-off-by: Lorenzo Bertin Salvador <lorenzobs@usp.br>
Link: https://lore.kernel.org/r/20240420182744.153184-2-lorenzobs@usp.br
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The IP core only has breaking changes when there major version changes.
Hence, only match the major number. This is also in line with the other
core ADI has upstream. The current check for erroring out
'expected_version > current_version"' is then wrong as we could just
increase the core major with breaking changes and that would go
unnoticed.
Fixes: ef04070692a2 ("iio: adc: adi-axi-adc: add support for AXI ADC IP core")
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-ad9467-new-features-v1-2-3e7628ff6d5e@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The AD9739A is a 14-bit, 2.5 GSPS high performance RF DACs that are capable
of synthesizing wideband signals from DC up to 3 GHz.
A dual-port, source synchronous, LVDS interface simplifies the digital
interface with existing FGPA/ASIC technology. On-chip controllers are used
to manage external and internal clock domain variations over temperature to
ensure reliable data transfer from the host to the DAC core.
Co-developed-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-10-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Support the Analog Devices Generic AXI DAC IP core. The IP core is used
for interfacing with digital-to-analog (DAC) converters that require either
a high-speed serial interface (JESD204B/C) or a source synchronous parallel
interface (LVDS/CMOS). Typically (for such devices) SPI will be used for
configuration only, while this IP core handles the streaming of data into
memory via DMA.
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-9-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This adds the needed backend ops for supporting a backend inerfacing
with an high speed dac. The new ops are:
* data_source_set();
* set_sampling_freq();
* extend_chan_spec();
* ext_info_set();
* ext_info_get().
Also to note the new helpers that are meant to be used by the backends
when extending an IIO channel (adding extended info):
* iio_backend_ext_info_set();
* iio_backend_ext_info_get().
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-8-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use the iio_dma_buffer_write() and iio_dma_buffer_space_available()
functions provided by the buffer-dma core, to enable write support in
the buffer-dmaengine code.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-5-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Update the devm_iio_dmaengine_buffer_setup() function to support
specifying the buffer direction.
Update the iio_dmaengine_buffer_submit() function to handle input
buffers as well as output buffers.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-4-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Adding write support to the buffer-dma code is easy - the write()
function basically needs to do the exact same thing as the read()
function: dequeue a block, read or write the data, enqueue the block
when entirely processed.
Therefore, the iio_buffer_dma_read() and the new iio_buffer_dma_write()
now both call a function iio_buffer_dma_io(), which will perform this
task.
Note that we preemptively reset block->bytes_used to the buffer's size
in iio_dma_buffer_request_update(), as in the future the
iio_dma_buffer_enqueue() function won't reset it.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-3-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Change its name to iio_dma_buffer_usage(), as this function can be used
both for the .data_available and the .space_available callbacks.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-2-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This brings the DMA buffer API more in line with what we have in the
triggered buffer. There's no need of having both
devm_iio_dmaengine_buffer_setup() and devm_iio_dmaengine_buffer_alloc().
Hence we introduce the new iio_dmaengine_buffer_setup() that together
with devm_iio_dmaengine_buffer_setup() should be all we need.
Note that as part of this change iio_dmaengine_buffer_alloc() is again
static and the axi-adc was updated accordingly.
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240419-iio-backend-axi-dac-v4-1-5ca45b4de294@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Both functions `dps310_get_pres_precision` and
`dps310_get_temp_precision` provide the oversampling rate by calling the
`BIT()` macro. However, to look up the corresponding scale factor, we
need the register value itself. Currently, this is achieved by undoing
the calculation of the oversampling rate with `ilog2()`.
Simplify the two functions for getting the scale factor and directly
use the register content for the lookup.
Signed-off-by: Thomas Haemmerle <thomas.haemmerle@leica-geosystems.com>
Link: https://lore.kernel.org/r/20240415105030.1161770-5-thomas.haemmerle@leica-geosystems.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Align error handling with `dps310_calculate_temp`, where it's not
possible to differentiate between errors and valid calculations by
checking if the returned value is negative.
Signed-off-by: Thomas Haemmerle <thomas.haemmerle@leica-geosystems.com>
Link: https://lore.kernel.org/r/20240415105030.1161770-3-thomas.haemmerle@leica-geosystems.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The current implementation interprets negative values returned from
`dps310_calculate_temp` as error codes.
This has a side effect that when negative temperature values are
calculated, they are interpreted as error.
Fix this by using the return value only for error handling and passing a
pointer for the value.
Fixes: ba6ec48e76bc ("iio: Add driver for Infineon DPS310")
Signed-off-by: Thomas Haemmerle <thomas.haemmerle@leica-geosystems.com>
Link: https://lore.kernel.org/r/20240415105030.1161770-2-thomas.haemmerle@leica-geosystems.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add support for the GPADC for the Allwinner H616. It is identical to
the existing ADC for the D1/T113s/R329/T507 SoCs.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240417170423.20640-3-macroalpha82@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Store pointers to chip info (struct ad5755_chip_info) in driver match
data, instead of enum, so every value will be != 0, populate the
of_device_id table and use it in driver. Even though it is one change,
it gives multiple benefits:
1. Allows to use spi_get_device_match_data() dropping local 'type'
variable.
2. Makes both ID tables usable, so kernel can match via any of these
methods.
3. Code is more obvious as both tables are properly filled.
4. Fixes W=1 warning:
ad5755.c:866:34: error: unused variable 'ad5755_of_match' [-Werror,-Wunused-const-variable]
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240413154511.52576-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Since commit 6020ca4de8e5 ("iio: adc: ad7944: use spi_optimize_message()"),
The helper functions wrapping spi_sync() for 3-wire and 4-wire modes are
virtually identical. Since gpiod_set_value_cansleep() does a NULL check
internally, we can consolidate the two functions into one and avoid
switch statements at the call sites.
The default cases of the removed switch statement were just to make the
compiler happy and are not reachable since the mode is validated in the
probe function. So removing those should be safe.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240412-ad7944-consolidate-msg-v1-1-7fdeff89172f@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Before all supported sensors except for MPU{9150,9250,9255} were not
allowed to use i2c-gate in the bindings which excluded quite a few
supported sensors where this functionality is supported.
Switch the list of sensors to ones where the Linux driver explicitly
disallows support for the auxiliary bus ("inv_mpu_i2c_aux_bus"). Since
the driver is also based on "default: return true" this should scale
better into the future.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20240408-mpu6050-i2c-gate-v1-1-621f051ce7de@z3ntu.xyz
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Switching to the _scoped() version removes the need for manual
calling of fwnode_handle_put() in the paths where the code
exits the loop early. In this case that's all in error paths.
A slightly less convincing usecase than many as all the failure paths
are wrapped up in a call to a per fwnode_handle utility function.
The complexity in that function is sufficient that it makes sense to
factor it out even if it this new auto cleanup would enable simpler
returns if the code was inline at the call site. Hence I've left it alone.
Cc: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240330185305.1319844-3-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Switching to the _scoped() version removes the need for manual
calling of fwnode_handle_put() in the paths where the code
exits the loop early. In this case that's all in error paths.
Note this would have made the bug fixed in the previous path much
less likely as it allows for direct returns.
Took advantage of dev_err_probe() to futher simplify things given no
longer a need for the goto err.
Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Tested-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Acked-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20240330185305.1319844-5-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This path would result in returning 0 / success on an error path.
Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Fixes: 95bc818404b2 ("iio: adc: stm32-adc: add support of generic channels binding")
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20240330185305.1319844-4-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
For example the BMP280 barometric pressure sensor on Qualcomm
MSM8974-based Nexus 5 smartphone exposes such file in sysfs.
Document it.
Whilst here, fix up incorrect repeated use of X as a wildcard
for in_tempY_input.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20240406-in_temp_input-v1-1-a1744a4a49e3@z3ntu.xyz
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This was obviously supposed to be a bitwise negate instead of logical.
Fixes: 76a1e6a42802 ("iio: adc: ad7173: add AD7173 driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/5401c681-c4aa-4fab-8c8c-8f0a379e2687@moroto.mountain
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The > comparison needs to be >= to prevent an out of bounds access.
Fixes: 620d1e6c7a3f ("iio: light: Add support for APDS9306 Light Sensor")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Subhajit Ghosh <subhajit.ghosh@tweaklogic.com>
Link: https://lore.kernel.org/r/69c5cb83-0209-40ff-a276-a0ae5e81c528@moroto.mountain
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add a setup function implementation to the spi module to enable spi-3wire
when specified in the device-tree. If spi-3wire is not specified in the
device-tree, NULL is returned as bus pre-initialization. This behavior
is identical to the i2c initialization, hence the default initialization.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-9-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add a comment to the probe() function to describe the passed function
pointer argument in particular.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-8-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Bring indio_dev, setup() and data initialization to begin of the probe()
function to increase readability. Access members through data
pointer to assure implicitely the driver's data instance is correctly
initialized and functional.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-7-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Provide a way for bus specific pre-configuration by adding a function
pointer argument to the driver core's probe() function, and keep
the driver core implementation bus independent.
In case NULL was passed, a regmap_write() shall initialize all bits of
the data_format register, else regmap_update() is used. In this way
spi and i2c are covered.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-6-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add spi-3wire because the device allows to be configured for spi 3-wire
communication.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240401194906.56810-5-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Move defines from core to the header file. Keep the defines block together
in one location.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-4-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Replace write() data_format by regmap_update_bits() to keep bus specific
pre-configuration which might have happened before on the same register.
The bus specific bits in data_format register then need to be masked out,
Remove the data_range field from the struct adxl345_data, because it is
not used anymore.
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-2-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Also change both firmware parsing functions to return meaningful errors.
Whilst for the ACPI case this isn't that useful, for the generic fwnode
case we can return the errors coming from the property parsing instead
of just whether we succeeded or not.
Cc: Marius Cristea <marius.cristea@microchip.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-9-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
By using this scoped based cleanup direct returns on errors are enabled
simplifying the code.
Cc: Mihail Chindris <mihail.chindris@analog.com>
Cc: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-8-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This loop definition automatically release the fwnode_handle on early exit
simplifying error handling paths.
Cc: Kim Seer Paller <kimseer.paller@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-7-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This loop definition automatically releases the fwnode_handle on early
exit such as the error cases seen here. This reducing boilerplate and
the chance of a resource leak being introduced in future.
Cc: Dumitru Ceclan <mitrutzceclan@gmail.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-6-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This loop definition removes the need for manual releasing of the fwnode_handle
in early exit paths (here an error path) allow simplfication of the code
and reducing the chance of future modificiations not releasing
fwnode_handle correctly.
Cc: Cosmin Tanislav <demonsingur@gmail.com>
Cc: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-5-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This new loop definition automatically releases the handle on early exit
reducing the chance of bugs that cause resource leaks.
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-4-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Seems these got renamed at somepoint but the documentation wasn't
updated to match.
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-3-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Switching to the _scoped() version removes the need for manual
calling of fwnode_handle_put() in the paths where the code
exits the loop early. In this case that's all in error paths.
Cc: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330185305.1319844-9-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Switching to the _scoped() version removes the need for manual
calling of fwnode_handle_put() in the paths where the code
exits the loop early. In this case that's all in error paths.
Removing the goto err; statements also allows more extensive use of
dev_err_probe() further simplifying the code.
Cc: Mihail Chindris <mihail.chindris@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330185305.1319844-8-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This modifies the ad7944 driver to use spi_optimize_message() to reduce
CPU usage and increase the max sample rate by avoiding repeating
validation of the spi message on each transfer.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240328-ad7944-spi-optimize-message-v2-1-a142b2576379@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This simplifies the adi,spi-mode property parsing by using
device_property_match_property_string() instead of two separate
functions. Also, the error return value is now more informative
in cases where there was a problem parsing the property.
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240325-ad7944-cleanups-v3-1-3a19120cdd06@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
