- 28 Mar, 2024 2 commits
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David Lechner authored
This adds a new page to document how to use the ad7944 ADC driver. Signed-off-by:
David Lechner <dlechner@baylibre.com> Link: https://lore.kernel.org/r/20240322-mainline-ad7944-doc-v2-2-0923d35d5596@baylibre.com Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com>
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David Lechner authored
Patches touching the IIO subsystem documentation should also be sent to the IIO mailing list. Signed-off-by:
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- 25 Mar, 2024 38 commits
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David Lechner authored
This adds support for AD7944 ADCs wired in "3-wire mode". (NOTE: 3-wire is the datasheet name for this wiring configuration and has nothing to do with SPI_3WIRE.) In the 3-wire mode, the SPI controller CS line can be wired to the CNV line on the ADC and used to trigger conversions rather that using a separate GPIO line. The turbo/chain mode compatibility check at the end of the probe function is technically can't be triggered right now but adding it now anyway so that we don't forget to add it later when support for daisy-chaining is added. Reviewed-by:
Nuno Sa <nuno.sa@analog.com> Signed-off-by:
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Colin Ian King authored
There is a statement with two semicolons. Remove the second one, it is redundant. Signed-off-by:
Colin Ian King <colin.i.king@gmail.com> Reviewed-by:
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Nuno Sa authored
Use the new cleanup magic for handling mutexes in IIO. This allows us to greatly simplify some code paths. While at it, also use __free(kfree) where allocations are done and drop obvious comment in iio_channel_read_min(). Signed-off-by:
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Nuno Sa authored
Use the new cleanup magic for handling mutexes in IIO. This allows us to greatly simplify some code paths. Signed-off-by:
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Nuno Sa authored
Use the new cleanup magic for handling mutexes in IIO. This allows us to greatly simplify some code paths. Signed-off-by:
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Nuno Sa authored
Use the new cleanup magic for handling mutexes in IIO. This allows us to greatly simplify some code paths. Note that we keep the plain mutex calls in the iio_device_release|acquire() APIs since in there the macros would likely not help much (as we want to keep the lock acquired when he leave the APIs). Signed-off-by:
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Jean-Baptiste Maneyrol authored
Add wakeup from suspend for WoM when enabled and put accel in low-power mode when suspended. Requires rewriting pwr_mgmt_1 register handling and factorize out accel LPF settings. Use a low-power rate similar to the chip sampling rate but always lower for a best match of the sampling rate while saving power and adjust threshold to follow the required roc value. Signed-off-by:
Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> Link: https://lore.kernel.org/r/20240311160557.437337-5-inv.git-commit@tdk.com Signed-off-by:
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Jean-Baptiste Maneyrol authored
Add new interrupt handler for generating WoM event from int status register bits. Launch from interrupt the trigger poll function for data buffer. Signed-off-by:
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Jean-Baptiste Maneyrol authored
Add WoM (roc rising) event as accel x_or_y_or_z event for all chips >= MPU-6500. This requires to create new MPU-6500 channels as default and MPU-6050 channels for older chips. Signed-off-by:
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Jean-Baptiste Maneyrol authored
WoM is a threshold test on accel value comparing actual sample with previous one. It maps best to roc rising event. Add support of a new WOM sensor and functions for handling the associated roc_rising event. The event value is in SI units. Ensure WOM is stopped and restarted at suspend-resume, handle usage with buffer data ready interrupt, and handle change in sampling rate impacting already set roc value. Signed-off-by:
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Javier Carrasco authored
The HDC3020 provides an active low reset signal that must be handled if connected. Asserting this signal turns the device into Trigger-on Demand measurement mode, reducing its power consumption when no measurements are required like in low-power modes. According to the datasheet, the longest "Reset Ready" is 3 ms, which is only taken into account if the reset signal is defined. Signed-off-by:
Javier Carrasco <javier.carrasco.cruz@gmail.com> Link: https://lore.kernel.org/r/20240303-hdc3020-pm-v3-3-48bc02b5241b@gmail.com Signed-off-by:
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Javier Carrasco authored
The HDC3020 provides an active low reset signal that is still not described in the bindings. Add reset-gpios to the bindings and the example. Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by:
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Javier Carrasco authored
The HDC3020 sensor carries out periodic measurements during normal operation, but as long as the power supply is enabled, it will carry on in low-power modes. In order to avoid that and reduce power consumption, the device can be switched to Trigger-on Demand mode, and if possible, turn off its regulator. According to the datasheet, the maximum "Power Up Ready" is 5 ms. Add resume/suspend pm operations to manage measurement mode and regulator state. Signed-off-by:
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David Lechner authored
This adds a driver for the Analog Devices Inc. AD7944, AD7985, and AD7986 ADCs. These are a family of pin-compatible ADCs that can sample at rates up to 2.5 MSPS. The initial driver adds support for sampling at lower rates using the usual IIO triggered buffer and can handle all 3 possible reference voltage configurations. Signed-off-by:
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David Lechner authored
This adds a new binding for the Analog Devices, Inc. AD7944, AD7985, and AD7986 ADCs. Reviewed-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Andy Shevchenko authored
Convert the module to be property provider agnostic and allow it to be used on non-OF platforms. Include mod_devicetable.h explicitly to replace the dropped of.h which included mod_devicetable.h indirectly. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20240304144037.1036390-1-andriy.shevchenko@linux.intel.com Signed-off-by:
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Dumitru Ceclan authored
Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2. Signed-off-by:
Dumitru Ceclan <mitrutzceclan@gmail.com> Link: https://lore.kernel.org/r/20240306110956.13167-4-mitrutzceclan@gmail.com Signed-off-by:
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Dumitru Ceclan authored
Rename to AD7172_2_ID to avoid confusion with _4 model. Reorder id's by reg value. Signed-off-by:
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Dumitru Ceclan authored
Add support for: AD7172-2, AD7175-8, AD7177-2. AD7172-4 does not feature an internal reference, check for external reference presence. Signed-off-by:
Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240306110956.13167-2-mitrutzceclan@gmail.com Signed-off-by:
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Subhajit Ghosh authored
Driver support for Avago (Broadcom) APDS9306 Ambient Light Sensor. It has two channels - ALS and CLEAR. The ALS (Ambient Light Sensor) channel approximates the response of the human-eye providing direct read out where the output count is proportional to ambient light levels. It is internally temperature compensated and rejects 50Hz and 60Hz flicker caused by artificial light sources. Hardware interrupt configuration is optional. It is a low power device with 20 bit resolution and has configurable adaptive interrupt mode and interrupt persistence mode. The device also features inbuilt hardware gain, multiple integration time selection options and sampling frequency selection options. This driver also uses the IIO GTS (Gain Time Scale) Helpers Namespace for Scales, Gains and Integration time implementation. Signed-off-by:
Subhajit Ghosh <subhajit.ghosh@tweaklogic.com> Link: https://lore.kernel.org/r/20240309105031.10313-6-subhajit.ghosh@tweaklogic.com Signed-off-by:
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Subhajit Ghosh authored
Extend avago,apds9300.yaml schema file to support apds9306 device. Acked-by:
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Subhajit Ghosh authored
Include irq.h and irq level macro in the example for readability Acked-by:
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Subhajit Ghosh authored
All devices covered by the binding have a vdd supply. Acked-by:
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Subhajit Ghosh authored
Merge very similar schemas for APDS9300 and APDS9960. Suggested-by:
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Andy Shevchenko authored
No need to rewrite the value, instead use 'else' branch. This will also help further refactoring the code later on. Signed-off-by:
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Andy Shevchenko authored
In iio_device_alloc() when size of the private data is 0, the private pointer is calculated to point behind the valid data. Leave it NULL when no private data supplied. Fixes: 6d4ebd56 ("iio: core: wrap IIO device into an iio_dev_opaque object") Signed-off-by:
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Javier Carrasco authored
The C standard specifies that there is no need to cast from a pointer to void [1]. Therefore, it can be safely dropped. [1] C Standard Committee: https://c0x.shape-of-code.com/6.3.2.3.html Signed-off-by:
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Javier Carrasco authored
The C standard specifies that there is no need to cast from a pointer to void [1]. Therefore, it can be safely dropped. [1] C Standard Committee: https://c0x.shape-of-code.com/6.3.2.3.html Signed-off-by:
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Javier Carrasco authored
The C standard specifies that there is no need to cast from a pointer to void [1]. Therefore, it can be safely dropped. [1] C Standard Committee: https://c0x.shape-of-code.com/6.3.2.3.html Signed-off-by:
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Dumitru Ceclan authored
The AD7173 family offer a complete integrated Sigma-Delta ADC solution which can be used in high precision, low noise single channel applications or higher speed multiplexed applications. The Sigma-Delta ADC is intended primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz. Reviewed-by:
Andy Shevchenko <andy@kernel.org> Reviewed-by: Michael Walle <michael@walle.cc> # for gpio-regmap Signed-off-by:
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Dumitru Ceclan authored
Add optional irq_num attribute to ad_sigma_delta_info structure for selecting the used interrupt line for ADC's conversion completion. Signed-off-by:
Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20240228110622.25114-2-mitrutzceclan@gmail.com Signed-off-by:
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Dumitru Ceclan authored
The AD7173 family offer a complete integrated Sigma-Delta ADC solution which can be used in high precision, low noise single channel applications or higher speed multiplexed applications. The Sigma-Delta ADC is intended primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz. Reviewed-by:
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Andy Shevchenko authored
Convert the module to be property provider agnostic and allow it to be used on non-OF platforms. Include mod_devicetable.h explicitly to replace the dropped of.h which included mod_devicetable.h indirectly. Signed-off-by:
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Jonathan Cameron authored
Using automated cleanup to replace of_node_put() handling allows for a simplfied flow by enabling direct returns on errors. Non available child nodes should never have been considered; that is ones where status != okay and was defined. Reviewed-by:
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Jonathan Cameron authored
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: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by:
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20240224123215.161469-5-jic23@kernel.org Signed-off-by:
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Jonathan Cameron authored
This use of the new cleanup.h scope based freeing infrastructure allows us to exit directly from error conditions and in the good path with the reference obtained from fwnode_find_reference() (which may be an error pointer) automatically released. Similarly the _scoped() version of device_for_each_child_node() removes the need for the manual calling of fwnode_handl_put() in paths where the code exits the loop early. Tidy up some unusual indentation in a dev_dbg() whilst here. Reviewed-by:
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Jonathan Cameron authored
Allows driver to be used with other firmware types and removes an example that might be copied into new IIO drivers. Cc: Andreas Klinger <ak@it-klinger.de> Reviewed-by:
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Jonathan Cameron authored
Only the irq was retrieved using an of specific accessor. Switch to the fwnode equivalent and adjust headers. Also include missing mod_devicetable.h and irq.h. Cc: Sean Nyekjaer <sean@geanix.com> Reviewed-by:
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