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13 daysiio: accel: adxl313: add missing error check in predisableAntoniu Miclaus1-0/+2
commit 9d3fa23d5d55a137fd4396d3d4799102587a7f2b upstream. Check the return value of the FIFO bypass regmap_write() before proceeding to disable interrupts. Fixes: ff8093fa6ba4 ("iio: accel: adxl313: add buffered FIFO watermark with interrupt handling") Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
13 daysiio: accel: adxl380: fix FIFO watermark bit 8 always written as 0Antoniu Miclaus1-1/+1
commit bd66aa1c8b8cabf459064a46d3430a5ec5138418 upstream. FIELD_PREP(BIT(0), fifo_samples & BIT(8)) produces either 0 or 256, and since FIELD_PREP masks to bit 0, 256 & 1 evaluates to 0. Use !! to convert the result to a proper 0-or-1 value. Fixes: df36de13677a ("iio: accel: add ADXL380 driver") Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
13 daysiio: accel: fix ADXL355 temperature signature valueValek Andrej1-1/+1
commit 4f51e6c0baae80e52bd013092e82a55678be31fc upstream. Temperature was wrongly represented as 12-bit signed, confirmed by checking the datasheet. Even if the temperature is negative, the value in the register stays unsigned. Fixes: 12ed27863ea3 iio: accel: Add driver support for ADXL355 Signed-off-by: Valek Andrej <andrej.v@skyrain.eu> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-03-04iio: accel: adxl380: Avoid reading more entries than present in FIFOFrancesco Lavra1-0/+1
[ Upstream commit c1b14015224cfcccd5356333763f2f4f401bd810 ] The interrupt handler reads FIFO entries in batches of N samples, where N is the number of scan elements that have been enabled. However, the sensor fills the FIFO one sample at a time, even when more than one channel is enabled. Therefore,the number of entries reported by the FIFO status registers may not be a multiple of N; if this number is not a multiple, the number of entries read from the FIFO may exceed the number of entries actually present. To fix the above issue, round down the number of FIFO entries read from the status registers so that it is always a multiple of N. Fixes: df36de13677a ("iio: accel: add ADXL380 driver") Signed-off-by: Francesco Lavra <flavra@baylibre.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-03-04iio: Use IRQF_NO_THREADSebastian Andrzej Siewior1-2/+3
[ Upstream commit 04d390af97f2c28166f7ddfe1a6bda622e3a4766 ] The interrupt handler iio_trigger_generic_data_rdy_poll() will invoke other interrupt handler and this supposed to happen from within the hardirq. Use IRQF_NO_THREAD to forbid forced-threading. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-02-27iio: sca3000: Fix a resource leak in sca3000_probe()Harshit Mogalapalli1-1/+5
[ Upstream commit 62b44ebc1f2c71db3ca2d4737c52e433f6f03038 ] spi->irq from request_threaded_irq() not released when iio_device_register() fails. Add an return value check and jump to a common error handler when iio_device_register() fails. Fixes: 9a4936dc89a3 ("staging:iio:accel:sca3000 Tidy up probe order to avoid a race.") Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-01-11iio: accel: iis328dq: fix gain valuesMarkus Koeniger1-1/+71
The sensors IIS328DQ and H3LIS331DL share one configuration but H3LIS331DL has different gain parameters, configs therefore need to be split up. The gain parameters for the IIS328DQ are 0.98, 1.95 and 3.91, depending on the selected measurement range. See sensor manuals, chapter 2.1 "mechanical characteristics", parameter "Sensitivity". Datasheet: https://www.st.com/resource/en/datasheet/iis328dq.pdf Datasheet: https://www.st.com/resource/en/datasheet/h3lis331dl.pdf Fixes: 46e33707fe95 ("iio: accel: add support for IIS328DQ variant") Reviewed-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com> Signed-off-by: Markus Koeniger <markus.koeniger@liebherr.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-21iio: accel: adxl380: fix handling of unavailable "INT1" interruptFrancesco Lavra1-3/+3
fwnode_irq_get_byname() returns a negative value on failure; if a negative value is returned, use it as `err` argument for dev_err_probe(). While at it, add a missing trailing newline to the dev_err_probe() error message. Fixes: df36de13677a ("iio: accel: add ADXL380 driver") Signed-off-by: Francesco Lavra <flavra@baylibre.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-07Merge tag 'char-misc-6.19-rc1' of ↵Linus Torvalds12-548/+1125
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc/IIO driver updates from Greg KH: "Here is the big set of char/misc/iio driver updates for 6.19-rc1. Lots of stuff in here including: - lots of IIO driver updates, cleanups, and additions - large interconnect driver changes as they get converted over to a dynamic system of ids - coresight driver updates - mwave driver updates - binder driver updates and changes - comedi driver fixes now that the fuzzers are being set loose on them - nvmem driver updates - new uio driver addition - lots of other small char/misc driver updates, full details in the shortlog All of these have been in linux-next for a while now" * tag 'char-misc-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (304 commits) char: applicom: fix NULL pointer dereference in ac_ioctl hangcheck-timer: fix coding style spacing hangcheck-timer: Replace %Ld with %lld hangcheck-timer: replace printk(KERN_CRIT) with pr_crit uio: Add SVA support for PCI devices via uio_pci_generic_sva.c dt-bindings: slimbus: fix warning from example intel_th: Fix error handling in intel_th_output_open misc: rp1: Fix an error handling path in rp1_probe() char: xillybus: add WQ_UNBOUND to alloc_workqueue users misc: bh1770glc: use pm_runtime_resume_and_get() in power_state_store misc: cb710: Fix a NULL vs IS_ERR() check in probe() mux: mmio: Add suspend and resume support virt: acrn: split acrn_mmio_dev_res out of acrn_mmiodev greybus: gb-beagleplay: Fix timeout handling in bootloader functions greybus: add WQ_PERCPU to alloc_workqueue users char/mwave: drop typedefs char/mwave: drop printk wrapper char/mwave: remove printk tracing char/mwave: remove unneeded fops char/mwave: remove MWAVE_FUTZ_WITH_OTHER_DEVICES ifdeffery ...
2025-11-15iio: accel: adxl380: add support for ADXL318 and ADXL319Jonathan Santos4-39/+107
The ADXL318 and ADXL319 are low noise density, low power, 3-axis accelerometers based on ADXL380 and ADXL382, respectively. The main difference between the new parts and the existing ones are the absence of interrupts and events like tap detection, activity/inactivity, and free-fall detection. Other differences in the new parts are fewer power modes, basically allowing only idle and measurement modes, and the removal of the 12-bit SAR ADC path for the 3-axis signals (known as lower signal chain), being excluisive for the temperature sensor in the ADXL318/319. Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-11iio: accel: bmc150: Fix irq assumption regressionLinus Walleij2-0/+6
The code in bmc150-accel-core.c unconditionally calls bmc150_accel_set_interrupt() in the iio_buffer_setup_ops, such as on the runtime PM resume path giving a kernel splat like this if the device has no interrupts: Unable to handle kernel NULL pointer dereference at virtual address 00000001 when read PC is at bmc150_accel_set_interrupt+0x98/0x194 LR is at __pm_runtime_resume+0x5c/0x64 (...) Call trace: bmc150_accel_set_interrupt from bmc150_accel_buffer_postenable+0x40/0x108 bmc150_accel_buffer_postenable from __iio_update_buffers+0xbe0/0xcbc __iio_update_buffers from enable_store+0x84/0xc8 enable_store from kernfs_fop_write_iter+0x154/0x1b4 This bug seems to have been in the driver since the beginning, but it only manifests recently, I do not know why. Store the IRQ number in the state struct, as this is a common pattern in other drivers, then use this to determine if we have IRQ support or not. Cc: stable@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: accel: bma220: move set_wdt() out of bma220_corePetre Rodan3-20/+19
Move bma220_set_wdt() into bma220_i2c.c instead of using a conditional based on i2c_verify_client() in bma220_core.c that would make core always depend on the i2c module. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202510102117.Jqxrw1vF-lkp@intel.com/ Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: remove useless includePetre Rodan1-1/+0
Remove errno.h include from bma220_i2c.c since error codes are generated within bma220_core.c instead. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: white space cleanupPetre Rodan2-3/+3
Clean up white space inconsistencies from the last patch series as requested by Jonathan. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Add detail to comments in GEN INTR configurationAkshay Jindal1-2/+8
Append additional information to existing comments in the generic interrupt configuration code to provide more context. Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Rename activity_event_en() to generic_event_en()Akshay Jindal1-4/+4
The function activity_event_en() configures the generic interrupts GEN1 and GEN2, which are used for activity and inactivity detection as per the datasheet. The existing name is misleading, since the device also provides activity change and activity recognition interrupts. Activity change interrupt is not supported yet whereas Activity recognition interrupt is configured in a different function. Rename activity_event_en() to generic_event_en() to better reflect its actual purpose. No functional changes intended. Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Replace bit shifts with FIELD_PREP() and FIELD_GET()Akshay Jindal2-9/+6
set_* functions involve left shift of param values into respective register fields before writing to register. Similarly get_* functions involve right shift to extract values from the respective bit fields. Replace these explicit shifting statements with standard kernel style macros FIELD_GET() and FIELD_PREP(). Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Use index-based register addressing and lookupAkshay Jindal2-60/+88
Introduce formula-based macros to compute GEN INTR configuration register addresses from the interrupt number and register index. This reduces the need for 22 explicit register macros to three base definitions. Add a centralized lookup table keyed by IIO event direction and replace get_gen_config_reg() with a helper integrated with this table. Apply these changes across the affected callbacks to ensure consistent access to generic interrupt registers. No functional changes are intended. Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Use macros for generic event configuration valuesAkshay Jindal2-3/+41
Add macros and enums for configuration values used in generic event handling for activity and inactivity detection. Replace hard-coded values in activity_event_en() with the new definitions to make the configuration explicit. No functional changes are intended. Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma400: Reorganize and rename register and field macrosAkshay Jindal2-159/+170
Reorganize register and field macros to improve consistency with the datasheet and naming style: - Move field macros next to their corresponding register macros - Reorder register macros to follow address order from the datasheet - Rename field macros to include the register name in the macro name - Add a _REG suffix to register macros where missing - Add INT_STAT register fields corresponding to used INT_CONFIG fields No functional changes are intended. Signed-off-by: Akshay Jindal <akshayaj.lkd@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add debugfs reg accessPetre Rodan1-0/+11
Allow read/write access to sensor registers for use in unit-tests. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add LPF cut-off frequency mappingPetre Rodan1-1/+58
Add mapping for the low pass filter cut-off frequency. Make valid values visible for both the cut-off frequency and the scale. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add interrupt triggerPetre Rodan1-0/+58
Add interrupt trigger. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add i2c watchdog featurePetre Rodan1-0/+14
Sometimes the sensor gets stuck and enters a condition in which it pulls SDA low, thus making the entire i2c bus unusable. This problem is mitigated by activating a 1ms watchdog implemented in the sensor. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add i2c modulePetre Rodan5-2/+87
Add the bma220_i2c module. Note that this kernel module transparently shifts all register addresses 1 bit to the left, so all functions will operate based on the SPI memory map. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: use find_match_table fctPetre Rodan1-7/+16
Clean up the code a bit by using a find_match_table function. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: populate buffer ts in trigger handlerPetre Rodan1-3/+2
Populate buffer timestamps in trigger handler since not all triggers can run the top half handler that provides pf->timestamp. Fixes failing unit test that triggers based on the INT signal. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: migrate to regmap APIPetre Rodan4-77/+172
Switch to regmap API. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: reset registers during init stagePetre Rodan1-8/+36
Bring all configuration registers to default values during device probe(). Remove trivial code duplication regarding bma220_power() in _init() Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: turn power supplies onPetre Rodan1-0/+7
Add devm_regulator_bulk_get_enable() to device probe(). Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: add open firmware tablePetre Rodan1-0/+7
Add open firmware entry to the spi driver. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: split original driverPetre Rodan5-304/+356
In preparation for the i2c module, move the original code into multiple source files without any other functional change. Create the additional bma220_core module which currently is not providing an abstracted bus type (this will change with the regmap patch). Fix a few includes in the context of this patch. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: cleanup includesPetre Rodan1-1/+3
Tweak includes based on requirements. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #added linux/errno.h
2025-10-19iio: accel: bma220: move bma220_power functionPetre Rodan1-24/+25
Move bma220_power() before bma220_init() as a precursor to a patch that removes code duplication. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: shorten spi->dev callsPetre Rodan1-5/+6
Provide functions easier access to device struct. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: cleanup license stringPetre Rodan1-1/+1
Fix checkpatch warning about use of "GPL v2" license: Prefer "GPL" over "GPL v2" - see commit bf7fbeeae6db ("module: Cure the MODULE_LICENSE "GPL" vs. "GPL v2" bogosity") Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: relax constraints during probe()Petre Rodan1-1/+6
Do not return error if the chip id being read is not the expected one. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: accel: bma220: remove incorrect kernel-doc markingPetre Rodan1-1/+1
Remove incorrect use of kernel-doc marking. Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-18iio: accel: fix ADXL355 startup race conditionValek Andrej1-5/+39
There is an race-condition where device is not full working after SW reset. Therefore it's necessary to wait some time after reset and verify shadow registers values by reading and comparing the values before/after reset. This mechanism is described in datasheet at least from revision D. Fixes: 12ed27863ea3 ("iio: accel: Add driver support for ADXL355") Signed-off-by: Valek Andrej <andrej.v@skyrain.eu> Signed-off-by: Kessler Markus <markus.kessler@hilti.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-09-13Merge tag 'v6.17-rc3' into togregJonathan Cameron1-1/+1
Linux 6.17-rc3
2025-08-25iio: accel: Remove redundant pm_runtime_mark_last_busy() callsSakari Ailus8-30/+6
pm_runtime_put_autosuspend(), pm_runtime_put_sync_autosuspend(), pm_runtime_autosuspend() and pm_request_autosuspend() now include a call to pm_runtime_mark_last_busy(). Remove the now-reduntant explicit call to pm_runtime_mark_last_busy(). Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Link: https://patch.msgid.link/20250825135401.1765847-2-sakari.ailus@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-25iio: accel: Drop unnecessary -ENOMEM messagesDixit Parmar8-24/+8
The drivers do not require their own error messages for error -ENOMEM, memory allocation failures. So remove the dev_err() messages from the probe(). Signed-off-by: Dixit Parmar <dixitparmar19@gmail.com> Link: https://patch.msgid.link/20250822-enomam_logs-v1-1-db87f2974552@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-25iio: accel: msa311: Remove dev_err_probe() if error is -ENOMEMXichao Zhao1-5/+3
The dev_err_probe() doesn't do anything when the error is '-ENOMEM'. Therefore, remove the useless call to dev_err_probe(), and just return the value instead. Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Link: https://patch.msgid.link/20250821080723.525379-2-zhao.xichao@vivo.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: Remove error prints for devm_add_action_or_reset()Waqar Hameed1-1/+1
When `devm_add_action_or_reset()` fails, it is due to a failed memory allocation and will thus return `-ENOMEM`. `dev_err_probe()` doesn't do anything when error is `-ENOMEM`. Therefore, remove the useless call to `dev_err_probe()` when `devm_add_action_or_reset()` fails, and just return the value instead. Signed-off-by: Waqar Hameed <waqar.hameed@axis.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Link: https://patch.msgid.link/pndectqm7te.a.out@axis.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: adxl345: extend inactivity time for less than 1sLothar Rubusch1-62/+138
Inactivity and free-fall events are essentially the same type of sensor events. Therefore, inactivity detection (normally set for periods between 1 and 255 seconds) can be extended for shorter durations to support free-fall detection. For periods shorter than 1 second, the driver automatically configures the threshold and duration using the free-fall register. For periods longer than 1 second, it uses the inactivity threshold and duration using the inactivity registers. When using the free-fall register, the link bit is not set, which means auto-sleep cannot be enabled if activity detection is also active. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://patch.msgid.link/20250727210014.27766-6-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: adxl345: add coupling detection for activity/inactivityLothar Rubusch1-14/+240
Enable AC/DC coupling configuration for activity and inactivity detection by setting the AC/DC bit. Extend existing magnitude-based detection with adaptive AC-coupled mode. Use DC-coupled mode to compare acceleration samples directly against configured thresholds. Use AC-coupled mode to compare samples against a reference taken at the start of activity detection. Implement DC-coupled events using MAG, and AC-coupled events using MAG_ADAPTIVE. Expose configuration of thresholds and periods via separate sysfs handles. Note that both coupling modes share the same sensor registers, so activity or inactivity detection cannot be configured for both AC and DC simultaneously. Apply the most recently configured mode. Simplify event handling and support adaptive AC-coupling. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://patch.msgid.link/20250727210014.27766-5-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: adxl345: add inactivity featureLothar Rubusch1-4/+237
Add support for the sensor’s inactivity feature in the driver. When both activity and inactivity detection are enabled, the sensor sets a link bit that ties the two functions together. This also enables auto-sleep mode, allowing the sensor to automatically enter sleep state upon detecting inactivity. Inactivity detection relies on a configurable threshold and a specified time period. If sensor measurements remain below the threshold for the defined duration, the sensor transitions to the inactivity state. When an Output Data Rate (ODR) is set, the inactivity time period is automatically adjusted to a sensible default. Higher ODRs result in shorter inactivity timeouts, while lower ODRs allow longer durations-within reasonable upper and lower bounds. This is important because features like auto-sleep operate effectively only between 12.5 Hz and 400 Hz. These defaults are applied when the sample rate is modified, but users can override them by explicitly setting a custom inactivity timeout. Similarly, configuring the g-range provides default threshold values for both activity and inactivity detection. These are implicit defaults meant to simplify configuration, but they can also be manually overridden as needed. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://patch.msgid.link/20250727210014.27766-4-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: adxl345: add activity event featureLothar Rubusch1-2/+238
Enable the sensor to detect activity and trigger interrupts accordingly. Activity events are determined based on a threshold, which is initialized to a sensible default during probe. This default value is adopted from the legacy ADXL345 input driver to maintain consistent behavior. The combination of activity detection, ODR configuration, and range settings lays the groundwork for the activity/inactivity hysteresis mechanism, which will be implemented in a subsequent patch. As such, portions of this patch prepare switch-case structures to support those upcoming changes. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://patch.msgid.link/20250727210014.27766-3-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: adxl345: simplify tap suppress bitLothar Rubusch1-6/+3
Simplify setting the tap suppress bit by applying regmap_assign_bit(). As a result, the defines can be reorganized for better clarity. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://patch.msgid.link/20250727210014.27766-2-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-08-16iio: accel: bma180: use stack allocated buffer for scanDavid Lechner1-7/+6
Move the scan struct to the stack instead of being in the driver state struct. The buffer is only used in a single function and does not need to be DMA-safe so it does not need to exist outside of that function's scope. Signed-off-by: David Lechner <dlechner@baylibre.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Link: https://patch.msgid.link/20250721-iio-use-more-iio_declare_buffer_with_ts-v2-1-f8fb11b8add8@baylibre.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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