- 11 Oct, 2023 10 commits
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David Lechner authored
Selecting the resolution was implemented as the `bits` sysfs attribute. However, the selection of the resolution depends on how the hardware is wired and the specific application, so this is rather a job for devicetree to describe. A new devicetree property `assigned-resolution-bits` to specify the resolution required for each chip is added and the `bits` sysfs attribute is removed. Since the resolution is now supplied by a devicetree property, the resolution-gpios are now optional and we can allow for the case where the resolution pins on the AD2S1210 are hard-wired instead of requiring them to be connected to gpios. Signed-off-by:
David Lechner <dlechner@baylibre.com> Link: https://lore.kernel.org/r/20231005-ad2s1210-mainline-v4-4-ec00746840fc@baylibre.comSigned-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com>
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David Lechner authored
The ad2s1210 driver has a device-specific attribute `fexcit` for setting the frequency of the excitation output. This converts it to a channel in order to use standard IIO ABI. The excitation frequency is an analog output that generates a sine wave. Only the frequency is configurable. According to the datasheet, the specified range of the excitation frequency is from 2 kHz to 20 kHz and can be set in increments of 250 Hz. Signed-off-by:
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David Lechner authored
The AD2S1210 resolver has a hysteresis feature that can be used to prevent flicker in the LSB of the position register. This can be either enabled or disabled. Disabling hysteresis is useful for increasing precision by oversampling. Signed-off-by:
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David Lechner authored
When reading registers on the AD2S1210 chip, we have to supply a "dummy" address for the second SPI tx byte so that we don't accidentally write to a register. This register will be read and the value discarded on the next regmap read or write call. Reading the fault register has a side-effect of clearing the faults so we should not use this register for the dummy read. Signed-off-by:
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AngeloGioacchino Del Regno authored
Commit a2d518fb ("iio: adc: mt6577_auxadc: Simplify with device managed function") simplified the driver with devm hooks, but wrongly states that the platform_set_drvdata(), platform_get_drvdata() are unused after the simplification: the driver data is infact used in .suspend() and .resume() PM callbacks, currently producing a kernel panic. Reintroduce the call to platform_set_drvdata() in the probe function Fixes: a2d518fb ("iio: adc: mt6577_auxadc: Simplify with device managed function") Signed-off-by:
AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by:
Markus Schneider-Pargmann <msp@baylibre.com> Reviewed-by:
Alexandre Mergnat <amergnat@baylibre.com> Link: https://lore.kernel.org/r/20231010121940.159696-1-angelogioacchino.delregno@collabora.comSigned-off-by:
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Alisa-Dariana Roman authored
Add fast settling mode support for AD7193. Add two new device specific attributes: oversampling_ratio and oversampling_ratio_available. For AD7193 the user can set the average factor by writing to oversampling_ratio. The possible values are exposed when reading oversampling_ratio_available. Signed-off-by:
Alisa-Dariana Roman <alisa.roman@analog.com> Link: https://lore.kernel.org/r/20231010124927.143343-4-alisadariana@gmail.comSigned-off-by:
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Alisa-Dariana Roman authored
Remove extend_name from channel macro since it is not used anywhere. Signed-off-by:
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Alisa-Dariana Roman authored
Move all chip specific data into chip_info structure. Signed-off-by:
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Jonathan Cameron authored
Reverted as Rob Herring is tracking undocumented compatibles and as per discussion in the thread, we can not remove this deprecated compatibles from the driver without potential/likely regressions. So keep it around as it's not that painful anyway. This reverts commit 711fb79a. Signed-off-by:
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Luca Ceresoli authored
Add OF device table with compatible strings to allow automatic module loading. Signed-off-by:
Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20231004-mxc4005-device-tree-support-v1-2-e7c0faea72e4@bootlin.comSigned-off-by:
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- 05 Oct, 2023 20 commits
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Matti Vaittinen authored
The iio_generic_buffer can return garbage values when the total size of scan data is not a multiple of the largest element in the scan. This can be demonstrated by reading a scan, consisting, for example of one 4-byte and one 2-byte element, where the 4-byte element is first in the buffer. The IIO generic buffer code does not take into account the last two padding bytes that are needed to ensure that the 4-byte data for next scan is correctly aligned. Add the padding bytes required to align the next sample with the scan size. Signed-off-by:
Matti Vaittinen <mazziesaccount@gmail.com> Fixes: e58537cc ("staging: iio: update example application.") Link: https://lore.kernel.org/r/ZRvlm4ktNLu+qmlf@dc78bmyyyyyyyyyyyyydt-3.rev.dnainternet.fiSigned-off-by:
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André Apitzsch authored
Explicity specify array indices to fix mapping between asahi_compass_chipset and ak_def_array. While at it, remove unneeded AKXXXX. Fixes: 4f9ea93a ("iio: magnetometer: ak8975: Convert enum->pointer for data in the match tables") Signed-off-by:
André Apitzsch <git@apitzsch.eu> Reviewed-by:
Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20231001-ak_magnetometer-v1-1-09bf3b8798a3@apitzsch.euSigned-off-by:
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David Lechner authored
This adds new DeviceTree bindings for the Analog Devices, Inc. AD2S1210 resolver-to-digital converter. Co-developed-by:
Apelete Seketeli <aseketeli@baylibre.com> Signed-off-by:
Michael Hennerich <michael.hennerich@analog.com> Reviewed-by:
Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230929-ad2s1210-mainline-v3-1-fa4364281745@baylibre.comSigned-off-by:
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Justin Stitt authored
strncpy() is deprecated for use on NUL-terminated destination strings [1]. We should prefer more robust and less ambiguous string interfaces. We expect adc->chan_name[val] to be NUL-terminated based on ch_name's use within functions that expect NUL-terminated strings like strncmp and printf-likes: | if (!strncmp(stm32_adc_ic[i].name, ch_name, STM32_ADC_CH_SZ)) { | /* Check internal channel availability */ | switch (i) { | case STM32_ADC_INT_CH_VDDCORE: | if (!adc->cfg->regs->or_vddcore.reg) | dev_warn(&indio_dev->dev, | "%s channel not available\n", ch_name); ... There is no evidence that NUL-padding is needed either. Considering the above, a suitable replacement is strscpy() [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. If, for any reason, NUL-padding _is_ required we should go for `strscpy_pad`. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2] Link: https://github.com/KSPP/linux/issues/90 Cc: linux-hardening@vger.kernel.org Signed-off-by:Justin Stitt <justinstitt@google.com> Reviewed-by:
Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230921-strncpy-drivers-iio-adc-stm32-adc-c-v1-1-c50eca098597@google.comSigned-off-by:
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George Stark authored
Add log messages for errors that may occur at the probe stage Signed-off-by:
George Stark <gnstark@sberdevices.ru> Link: https://lore.kernel.org/r/20230721102413.255726-3-gnstark@sberdevices.ruSigned-off-by:
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Matti Vaittinen authored
dt-bindings: iio: Add KX132ACR-LBZ accelerometer ROHM KX132ACR-LBZ is an accelerometer for industrial applications. It has a subset of KX022A functionalities, dropping support for tap, free fall and tilt detection engines. Also, the register interface is an exact subset of what is found on KX022A (except the WHO_AM_I register value). Add support for KX132ACR-LBZ. Signed-off-by:
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Matti Vaittinen authored
ROHM KX132ACR-LBZ is an accelerometer for industrial applications. It has a subset of KX022A functionalities, dropping support for tap, free fall and tilt detection engines. Also, the register interface is an exact subset of what is found on KX022A. Extend the kionix,kx022a.yaml file to support the KX132ACR-LBZ device Signed-off-by:
Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/5c9e03ffad5e6e5970d6e71fb02eab4b652e109f.1695879676.git.mazziesaccount@gmail.comSigned-off-by:
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Alisa-Dariana Roman authored
Instead of using the f_order member of ad7192_state, a function that computes the f_order coefficient makes more sense. This coefficient is a function of the sinc filter and chop filter states. Remove f_order member of ad7192_state structure. Instead use ad7192_compute_f_order function to compute the f_order coefficient according to the sinc filter and chop filter states passed as parameters. Add ad7192_get_f_order function that returns the current f_order coefficient of the device. Add ad7192_compute_f_adc function that computes the f_adc value according to the sinc filter and chop filter states passed as parameters. Add ad7192_get_f_adc function that returns the current f_adc value of the device. Signed-off-by:
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Alisa-Dariana Roman authored
Include bitfield.h and update driver to use bitfield access macros GENMASK, FIELD_PREP and FIELD_GET. Remove old macros in favor of using FIELD_PREP and masks. Change %d to %ld to match the type of FIELD_GET(). Signed-off-by:
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Matti Vaittinen authored
Add myself as a maintainer for ROHM BM1390 pressure sensor driver. Signed-off-by:
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Matti Vaittinen authored
Support for the ROHM BM1390 pressure sensor. The BM1390GLV-Z can measure pressures ranging from 300 hPa to 1300 hPa with configurable measurement averaging and internal FIFO. The sensor does also provide temperature measurements. Sensor does also contain IIR filter implemented in HW. The data-sheet says the IIR filter can be configured to be "weak", "middle" or "strong". Some RMS noise figures are provided in data sheet but no accurate maths for the filter configurations is provided. Hence, the IIR filter configuration is not supported by this driver and the filter is configured to the "middle" setting (at least not for now). The FIFO measurement mode is only measuring the pressure and not the temperature. The driver measures temperature when FIFO is flushed and simply uses the same measured temperature value to all reported temperatures. This should not be a problem when temperature is not changing very rapidly (several degrees C / second) but allows users to get the temperature measurements from sensor without any additional logic. This driver allows the sensor to be used in two muitually exclusive ways, 1. With trigger (data-ready IRQ). In this case the FIFO is not used as we get data ready for each collected sample. Instead, for each data-ready IRQ we read the sample from sensor and push it to the IIO buffer. 2. With hardware FIFO and watermark IRQ. In this case the data-ready is not used but we enable watermark IRQ. At each watermark IRQ we go and read all samples in FIFO and push them to the IIO buffer. Signed-off-by:
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Matti Vaittinen authored
BM1390GLV-Z is a pressure sensor which performs internal temperature compensation for the MEMS. Pressure range is from 300 hPa to 1300 hPa and sample averaging and IIR filtering is built in sensor. Temperature measurement is also supported. Add dt-bindings for the sensor. Signed-off-by:
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Matti Vaittinen authored
The available_scan_mask is an array of bitmaps representing the channels which can be simultaneously enabled by the driver. In many cases, the hardware can offer more channels than what the user is interested in obtaining. In such cases, it may be preferred that only a subset of channels are enabled, and the driver reads only a subset of the channels from the hardware. Some devices can't support all channel combinations. For example, the BM1390 pressure sensor must always read the pressure data in order to acknowledge the watermark IRQ, while reading temperature can be omitted. So, the available scan masks would be 'pressure and temperature' and 'pressure only'. When IIO searches for the scan mask it asks the driver to use, it will pick the first suitable one from the 'available_scan_mask' array. Hence, ordering the masks in the array makes a difference. We should 'prefer' reading just the pressure from the hardware (as it is a cheaper operation than reading both pressure and temperature) over reading both pressure and temperature. Hence, we should set the 'only pressure' as the first scan mask in available_scan_mask array. If we set the 'pressure and temperature' as first in the array, then the 'only temperature' will never get used as 'pressure and temperature' can always serve the user's needs. Add (minimal) kerneldoc to the 'available_scan_mask' to hint the user that the ordering of masks matters. Signed-off-by:
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Andreas Kemnade authored
Some boards fail in magnetometer probe if level shifter flag is not set, definition was found in the vendor Linux kernel v3.0. Signed-off-by:
Andreas Kemnade <andreas@kemnade.info> Reviewed-by:
Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by:
Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> Link: https://lore.kernel.org/r/20230927173245.2151083-3-andreas@kemnade.infoSigned-off-by:
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Andreas Kemnade authored
Add a level shifter flag as found in ancient platform data struct: level_shifter: 0: VLogic, 1: VDD Signed-off-by:
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Antoniu Miclaus authored
The http://ez.analog.com/community/linux-device-drivers link is broken. Update website link to the new available one: https://ez.analog.com/linux-software-driversSigned-off-by:
Antoniu Miclaus <antoniu.miclaus@analog.com> Link: https://lore.kernel.org/r/20230926100149.4611-1-antoniu.miclaus@analog.comSigned-off-by:
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Ramona Gradinariu authored
The temperature channel has 16-bit storage size. We need to perform the padding to have the buffer elements naturally aligned in case the temperature channel is enabled and there are any 32-bit storage size channels enabled which have a scan index higher than the temperature channel scan index. Fixes: 8f6bc87d ("iio: imu: adis16475.c: Add delta angle and delta velocity channels") Signed-off-by:
Ramona Gradinariu <ramona.gradinariu@analog.com> Reviewed-by:
Nuno Sa <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20230926085721.645687-2-ramona.gradinariu@analog.comSigned-off-by:
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David Lechner authored
This modifies the ad2s1210_show_fexcit() function to read the excitation frequency from the control register. This way we don't have to keep track of the value and don't risk returning a stale value. Signed-off-by:
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David Lechner authored
This combines the ad2s1210_update_frequency_control_word() and ad2s1210_soft_reset() functions into a single function since they both have to be called together. (The software reset does not reset any configuration registers, it only updates the excitation output and resets the tracking loop.) Also clean up a few things while touching this: - move AD2S1210_DEF_EXCIT macro with similar macros - remove unnecessary dev_err() calls Signed-off-by:
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David Lechner authored
- Remove "adi," prefix from gpio names. - Sample gpio is now expected to be active low. - Convert A0 and A1 gpios to "mode-gpios" gpio array. - Convert RES0 and RES1 gpios to "resolution-gpios" gpio array. - Remove extraneous lookup tables. - Remove unused mode field from state struct. - Swap argument order of ad2s1210_set_mode() while we are touching this. Signed-off-by:
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- 30 Sep, 2023 10 commits
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David Lechner authored
This removes the config register sysfs attribute. Writing to the config register directly can be dangerous and userspace should not need to have to know the register layout. This register can still be accessed though debugfs if needed. We can add new attributes to set specific flags in the config register in the future if needed (e.g. `enable_hysterisis` and `phase_lock_range`). Signed-off-by:
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David Lechner authored
This add an implementation of debugfs_reg_access for the AD2S1210 driver. Signed-off-by:
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David Lechner authored
This makes use of the regmap API to read and write the configuration registers. This simplifies code quite a bit and makes it safer (previously, it was easy to write a bad value to the config registers which causes the chip to lock up and need to be reset). This chip has multiple modes of operation. In normal mode, we do not use regmap since there is no addressing - data is just bitshifted out during the SPI read. In config mode, we use regmap since it requires writing the address (with read/write flag) before reading and writing. We don't use the lock provided by the regmap because we need to also synchronize with the normal mode SPI reads and with the various GPIOs. There is also a quirk when reading registers (other than the fault register). If the address/data bit is set in the value read, then it indicates there is a configuration parity error and the data is not valid. Previously, this was checked in a few places, but not consistently. Now, we always check it in the regmap read function. Signed-off-by:
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David Lechner authored
This removes the fclkin sysfs attribute and replaces it with getting the CLKIN clock rate using the clk subsystem (i.e. from the devicetree). CLKIN comes from an external oscillator that is connected directly to the AD2S1210 chip, so users of the sysfs attributes should not need to be concerned with this. The fclkin field (the datasheet name) is renamed to clkin_hz to be more obvious that it is a frequency in Hz. Signed-off-by:
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David Lechner authored
This adds an implementation of IIO_CHAN_INFO_SCALE to the ad2s1210 resolver driver. This allows userspace to get the scale factor for the raw values. Signed-off-by:
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David Lechner authored
This removes the special handling for resolutions lower than 16 bits. This will allow us to use a fixed scale independent of the resolution. A new sample field is added to store the raw data instead of reusing the config mode rx buffer so that we don't have to do a cast or worry about unaligned access. Also, for the record, according to the datasheet, the logic for the special handling based on hysteresis that was removed was incorrect. Signed-off-by:
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David Lechner authored
There are quite a few imports and we will be adding more so it will make it easier to read if they are sorted. Signed-off-by:
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David Lechner authored
Since we never call spi_get_drvdata(), we can remove spi_set_drvdata(). Signed-off-by:
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David Lechner authored
This adds a check to the return value of ad2s1210_initial() since it can fail. The call is also moved before devm_iio_device_register() so that we don't have to unregister the device if it fails. Signed-off-by:
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David Lechner authored
This removes the call to spi_setup() in the ad2s1210 driver. Setting MODE_3 was incorrect. It should be MODE_1 but we can let the device tree select this and avoid the need to call spi_setup(). Signed-off-by:
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