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path: root/drivers/iio/dac
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2026-04-06Merge tag 'v7.0-rc7' into char-misc-nextGreg Kroah-Hartman
We need the char/misc/iio/comedi fixes in here as well for testing Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-03-22iio: dac: ds4424: add Rfs-based scale and per-variant limitsOleksij Rempel
Parse optional maxim,rfs-ohms values to derive the per-channel output current scale (mA per step) for the IIO current ABI. Behavior changes: - If maxim,rfs-ohms is present, IIO_CHAN_INFO_SCALE becomes available and reports mA/step derived from Rfs. - If maxim,rfs-ohms is missing, SCALE is not exposed to keep older DTs working without requiring updates. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: convert to regmapOleksij Rempel
Refactor the driver to use the regmap API. Replace the driver-specific mutex and manual shadow buffers with the standard regmap infrastructure for locking and caching. This ensures the cache is populated from hardware at probe, preventing state desynchronization (e.g. across suspend/resume). Define access tables to validate the different register maps of DS44x2 and DS44x4. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Sander Vanheule <sander@svanheule.net> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: support per-variant output range limitsOleksij Rempel
The DS4402/DS4404 variants operate with a 5-bit resolution (31 steps), whereas the DS4422/DS4424 support 7-bit (127 steps). Previously, the driver enforced a hardcoded 7-bit mask (DS4424_DAC_MASK) for all variants. This allowed users to write values exceeding the 5-bit range to DS4402/DS4404 devices, resulting in silent truncation or undefined behavior. Add a `result_mask` field to the chip_info structure to define the valid data range for each variant. Use this mask to: 1. Correctly mask register values in read_raw(). 2. Return -EINVAL in write_raw() if the input value exceeds the variant's capabilities. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: add DS4402/DS4404 device IDsDavid Jander
Add I2C/OF IDs for DS4402 and DS4404 and set the correct channel count. Follow-up changes add per-variant scaling based on external Rfs. Co-developed-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: David Jander <david@protonic.nl> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: use fsleep() instead of usleep_range()Oleksij Rempel
The DS4422/DS4424 and DS4402/DS4404 datasheets do not specify a minimum delay between power-up (POR) and the availability of the I2C interface. The driver previously used `usleep_range(1000, 1200)` to enforce a ~1ms delay. Replace this with `fsleep(1000)` to allow the kernel to select the most efficient sleep mechanism while retaining the existing conservative delay to ensure device readiness. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: use device match data for chip infoOleksij Rempel
Refactor the driver to use device match data instead of checking ID enums in a switch statement. Define a `ds4424_chip_info` structure to hold variant-specific attributes (currently just the channel count) and attach it directly to the I2C and OF device ID tables. This simplifies the probe function and makes it easier to add support for new variants like DS4402/DS4404. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: rename iio_info struct to avoid ambiguityOleksij Rempel
Rename the static `ds4424_info` structure to `ds4424_iio_info`. The previous name was generic and could be confused with chip-specific data structures (like the upcoming `ds4424_chip_info`). The new name explicitly indicates that this structure holds the IIO framework callbacks. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: sort headers alphabeticallyOleksij Rempel
Sort the header inclusions alphabetically. This improves readability and simplifies adding new includes in the future. Group subsystem-specific headers (linux/iio/*) separately at the end to clarify subsystem context. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: ratelimit read errors and use device contextOleksij Rempel
Replace pr_err() with dev_err_ratelimited() in the RAW read path to avoid log spam on repeated I2C failures and to include the device context. Use %pe to print errno names for faster debugging. Use the parent device context to identify the physical hardware causing the error. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22iio: dac: ds4424: refactor raw access to use bitwise operationsOleksij Rempel
Refactor the raw access logic to use standard GENMASK() and BIT() macros. Use abs() for magnitude calculation to simplify the logic and make the data flow clearer. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-22Merge tag 'v7.0-rc4' into togregJonathan Cameron
Linux 7.0-rc4 Required for the ds4422 series which is build upon; 5187e03b817c ("iio: dac: ds4424: reject -128 RAW value")
2026-03-22iio: dac: ad5770r: fix error return in ad5770r_read_raw()Antoniu Miclaus
Return the error code from regmap_bulk_read() instead of 0 so that I/O failures are properly propagated. Fixes: cbbb819837f6 ("iio: dac: ad5770r: Add AD5770R support") Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Cc: <stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-21iio: dac: ltc2632: add support for LTC2654 DAC familyDavid Marinovic
Add support for the Linear Technology LTC2654 quad DAC family. The LTC2654 is a 4-channel, 16-/12-bit DAC with SPI interface, sharing the same 24-bit SPI protocol as the existing LTC2632/ LTC2634/LTC2636 devices supported by this driver. The 12-bit variants of LTC2654 reuse existing LTC2634 chip_info structs as they are register-compatible. Add support for the following variants: - LTC2654L-16: 16-bit, 2.5V internal reference - LTC2654L-12: 12-bit, 2.5V internal reference - LTC2654H-16: 16-bit, 4.096V internal reference - LTC2654H-12: 12-bit, 4.096V internal reference Signed-off-by: David Marinovic <david.marinovic@pupin.rs> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-21iio: dac: ltc2632: drop enum and use individual chip_info objectsDavid Marinovic
Remove the ltc2632_chip_info_tbl[] array and related ltc2632_supported_device_ids enum used for looking up chip-specific information. Instead, use separate static const struct ltc2632_chip_info objects for each supported chip variant. Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: David Marinovic <david.marinovic@pupin.rs> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-15iio: dac: mcp47feb02: Fix Vref validation [1-999] caseAriana Lazar
Store reference voltages in uV instead of mV to avoid invalid error code in dev_err_probe() call. Vref variables store the actual value returned by devm_regulator_get_enable_read_voltage() function instead of the results of dividing it by MILLI. The corner case [1-999] divided by MILLI of the voltage reference variable value would become 0 is covered too. Fixes: bf394cc80369 ("iio: dac: adding support for Microchip MCP47FEB02") Link: https://lore.kernel.org/all/aYXvP5FLA5BvkoVX@stanley.mountain/ Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-03iio: dac: ti-dac5571: remove unused id fieldAntoniu Miclaus
Remove unused id field from dac5571_data struct. The field is declared but never accessed in the driver. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-03iio: dac: adi-axi-dac: remove unused int_tone fieldAntoniu Miclaus
Remove unused int_tone field from axi_dac_state struct. The field is declared but never accessed in the driver. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-03iio: dac: ad5360: converting to guard(mutex)Menderes Sabaz
Converting mutex_lock and mutex_unlock to guard(mutex) Signed-off-by: Menderes Sabaz <sabazmenderes@gmail.com> Reviewed-by: David Lechner <dlechner@baylibre.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-03-01iio: dac: mcp47feb02: Fix mutex used before initializationFelix Gu
The mcp47feb02_parse_fw() function uses data->lock, but the mutex was initialized after this function in probe path. Since mcp47feb02_parse_fw() is only called from probe(), remove the lock. Fixes: bf394cc80369 ("iio: dac: adding support for Microchip MCP47FEB02") Signed-off-by: Felix Gu <ustc.gu@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-28iio: dac: ad7293: use dev_err_probe()Antoniu Miclaus
Use dev_err_probe() consistently in the probe path to simplify error handling and ensure deferred probes are logged correctly. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-28iio: dac: ad7293: add dev variableAntoniu Miclaus
Introduce a local struct device pointer in functions that reference &spi->dev for device-managed resource calls and device property reads, improving code readability. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-23iio: dac: ds4424: reject -128 RAW valueOleksij Rempel
The DS442x DAC uses sign-magnitude encoding, so -128 cannot be represented in hardware (7-bit magnitude). Previously, passing -128 resulted in a truncated value that programmed 0mA (magnitude 0) instead of the expected maximum negative current, effectively failing silently. Reject -128 to avoid producing the wrong current. Fixes: d632a2bd8ffc ("iio: dac: ds4422/ds4424 dac driver") Cc: stable@vger.kernel.org Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-23iio: dac: max5522: simplify probe with devm_regulator_get_enable_read_voltage()Antoniu Miclaus
Simplify probe by using devm_regulator_get_enable_read_voltage() to get, enable and read the regulator voltage in a single call, caching the value at probe time. The reference voltage for this DAC is a fixed hardware configuration that is not expected to change at runtime, so reading it once during probe and caching the millivolt value is sufficient. Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-23iio: dac: adi-axi-dac: define supported iio-backend capabilitiesTomas Melin
Backends support the buffer/enable capabilities so advertise it while registering in case a frontend makes checks for it. Reviewed-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: David Lechner <dlechner@baylibre.com> Signed-off-by: Tomas Melin <tomas.melin@vaisala.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-02-22Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL usesKees Cook
Conversion performed via this Coccinelle script: // SPDX-License-Identifier: GPL-2.0-only // Options: --include-headers-for-types --all-includes --include-headers --keep-comments virtual patch @gfp depends on patch && !(file in "tools") && !(file in "samples")@ identifier ALLOC = {kmalloc_obj,kmalloc_objs,kmalloc_flex, kzalloc_obj,kzalloc_objs,kzalloc_flex, kvmalloc_obj,kvmalloc_objs,kvmalloc_flex, kvzalloc_obj,kvzalloc_objs,kvzalloc_flex}; @@ ALLOC(... - , GFP_KERNEL ) $ make coccicheck MODE=patch COCCI=gfp.cocci Build and boot tested x86_64 with Fedora 42's GCC and Clang: Linux version 6.19.0+ (user@host) (gcc (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7), GNU ld version 2.44-12.fc42) #1 SMP PREEMPT_DYNAMIC 1970-01-01 Linux version 6.19.0+ (user@host) (clang version 20.1.8 (Fedora 20.1.8-4.fc42), LLD 20.1.8) #1 SMP PREEMPT_DYNAMIC 1970-01-01 Signed-off-by: Kees Cook <kees@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21treewide: Replace kmalloc with kmalloc_obj for non-scalar typesKees Cook
This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-02Merge tag 'iio-for-7.0a' of ↵Greg Kroah-Hartman
ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next Jonathan writes: IIO: New device support, features and cleanup for the 6.20/7.0 cycle. Slightly messier than normal unfortunately due to some conflicts and build config bugs related to I3C drivers. One last minute Kconfig fix right at the top after a linux-next report. I've simplified the Kconfig and made it match other instances in the kernel so that should be safe enough despite short soak time in front of build bots. Merge of an immutable branch from I3C to get some stubs that were missing and caused build issues with dual I2C / I3C drivers. This also brought in a drop of some deprecated interfaces so there is also one patch to update a new driver to not use those. We are having another go at using cleanup.h magic with the IIO mode claim functions after backing out last try at this. This time we have wrappers around the new ACQUIRE() and ACQUIRE_ERR() macros. Having been burnt once, we will be taking it a bit more slowly this time wrt to wide adoption of these! Thanks in particular to Kurt for taking on this core IIO work. New Device Support ================== adi,ad18113 - New driver to support the AD18113 amplifier - an interesting device due to the external bypass paths where we need to describe what gain those paths have in DT. Longer term it will be interesting to see if this simplistic description is enough for real deployments. adi,ad4062 - New driver for the AD4060 and AD4052 SAR ADCs including trigger, event and GPIO controller support. Follow up patch replaced use of some deprecated I3C interfaces prior to the I3C immutable branch merge as that includes dropping them. adi,ad4134 - New driver for the AD4134 24bit 4 channel simultaneous sampling ADC. adi,ad7768-1, - Add support for the ADAQ767-1, ADAQ7768-1 and ADAQ7769-1 ADCs after some rework to enable the driver to support multiple device types. adi,ad9467 - Add support for the similar ad9211 ADC to this existing driver. - Make the selection of 2s comp mode explicit for normal operation and switch to offset binary when entering calibration mode. honeywell,abp2 - New driver to support this huge family (100+) of board mount pressure and temperature sensors. maxim,max22007 - New drier for this 4 channel DAC. memsic,mmc5633 - New driver for this I2C/I3C magnetometer. Follow on patches fixed up issues related to single driver supporting both bus types. microchip,mcp747feb02 - New driver for the Microchip MCP47F(E/V)B(0/1/2)1, MCP47F(E/V)B(0/1/2)2, MCP47F(E/V)B(0/1/2)4 and MCP47F(E/V)B(0/1/2)8 buffered voltage output DACs. nxp,sar-adc - New driver support ADCs found on s32g2 and s32g3 platforms. ti,ads1018 - New drier for the ADS1018 and ADS1118 SPI ADCs. ti,ads131m02 - New driver supporting ADS131M(02/03/04/06/08)24-bit simultaneous sampling ADCs. Features ======== iio-core - New IIO_DEV_ACQUIRE_DIRECT_MODE() / IIO_DEV_ACQUIRE_FAILED() + equivalents for the much rarer case where the mode needs pinning whether or not it is in direct mode. These use the ACQUIRE() / ACQUIRE_ERR() infrastructure underneath to provide both simple checks on whether we got the requested mode and to provide scope based release. Applied in a few initial drivers. adi,ad9467 - Support calibbias control adi,adf4377 - Add support to act as a clock provider. adi,adxl380 - Support low power 1KHz sampling frequency mode. Required rework of how events and filters were configured, plus applying of constraints when in this mode. rf-digital,rfd77402 - Add interrupt support as alternative to polling for completion. st,lsm6dsx - Tap event detection (after considerable driver rework) Cleanup and Minor Fixes ======================= More minor cleanup such as typos, white space etc not called out except where they were applied to a lot of drivers. Various drivers. - Use of dev_err_probe() to cleanup error handling. - Introduce local struct device and struct device_node variables to reduce duplication of getting them from containing structs. - Ensure uses of iio_trigger_generic_data_rdy_poll() set IRQF_NO_THREAD as that function calls non threaded child interrupt handlers. - Replace IRQF_ONESHOT in not thread interrupt handlers with IRQF_NO_THREAD to ensure they run as intended. Drop one unnecessary case. iio-sw-device/trigger. - Constify configs_group_operations structures. iio-buffer-dma / buffer-dma-engine - Use lockdep_assert_held() to replace WARN_ON() to check lock is correctly held. - Make use of cleanup.h magic to simplify various code paths. - Make iio_dma_buffer_init() return void rather than always success. adi,ad7766 - Replace custom interrupt handler with iio_trigger_generic_data_rdy_poll() adi,ad9832 - Drop legacy platform_data support. adi,ade9000 - Add a maintainer entry. adi,adt7316 - Move to EXPORT_GPL_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() so the compiler can cleanly drop unused pm structures and callbacks. adi,adxl345 - Relax build constraint vs the driver that is in input so both may be built as modules and selection made at runtime. adi,adxl380 - Make sure we don't read tail entries in the hardware fifo if a partial new scan has been written. - Move to a single larger regmap_noinc_read() to read the hardware fifo. aspeed,ast2600 - Add missing interrupts property to DT binding. bosch,bmi270_i2c - Add missing MODULE_DEVICE_TABLE() macros so auto probing of modules can work. bosch,smi330 - Drop duplicate assignment of IIO_TYPE in smi330_read_avail() - Use new common field_get() and field_prep() helpers to replace local version. honeywell,mprls0025pa Fixes delayed to merge window as late in cycle and we didn't want to delay the rest of the series. - Allow Kconfig selection of specific bus sub-drivers rather than tying that to the buses themselves being supported. - Zero spi_transfer structure to avoid chance of unintentionally set fields effecting transfer. - Fix a potential timing violation wrt to the chip select to first clock edge timing. - As recent driver, take risk inherent in dropping interrupt direction from driver as that should be set by firmware. - Fix wrong reported number of data bits for channel. - Fix a pressure channel calculation bug. - Rework to allow embedding the tx buffer in the iio_priv() structure rather than requiring separate allocation. - Move the buffer clearing to the shared core bringing it into affect for SPI as well as I2C. - Stricter checks for status byte. - Greatly simplify the measurement sequence. - Add a copyright entry to reflect Petre's continued work on this driver. intersil,isl29018 - Switch from spritnf to sysfs_emit_at() to make it clear overflow can't occur. invensense,icm42600 - Allow sysfs access to temperature when buffered capture in use as it does not impact other sensor data paths. invensense,itg3200 - Check unused return value in read_raw() callback. men,z188 - Drop now duplicated module alias. rf-digital,rfd77402 - Add DT binding doc and explicit of_device_id table. - Poll for timeout with times as on datasheet, then replace opencoded version with read_poll_timeout(). sensiron,scd4x - Add missing timestamp channel. The code to push it to the buffer was there but there was no way to turn it on. vti,sca3000 - Fix resource leak if iio_device_register() fails. * tag 'iio-for-7.0a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (144 commits) iio: magn: mmc5633: Fix Kconfig for combination of I3C as module and driver builtin iio: sca3000: Fix a resource leak in sca3000_probe() iio: proximity: rfd77402: Add interrupt handling support iio: proximity: rfd77402: Document device private data structure iio: proximity: rfd77402: Use devm-managed mutex initialization iio: proximity: rfd77402: Use kernel helper for result polling iio: proximity: rfd77402: Align polling timeout with datasheet iio: cros_ec: Allow enabling/disabling calibration mode iio: frequency: ad9523: correct kernel-doc bad line warning iio: buffer: buffer_impl.h: fix kernel-doc warnings iio: gyro: itg3200: Fix unchecked return value in read_raw MAINTAINERS: add entry for ADE9000 driver iio: accel: sca3000: remove unused last_timestamp field iio: accel: adxl372: remove unused int2_bitmask field iio: adc: ad7766: Use iio_trigger_generic_data_rdy_poll() iio: magnetometer: Remove IRQF_ONESHOT iio: Replace IRQF_ONESHOT with IRQF_NO_THREAD iio: Use IRQF_NO_THREAD iio: dac: Add MAX22007 DAC driver support dt-bindings: iio: dac: Add max22007 ...
2026-01-23iio: dac: Add MAX22007 DAC driver supportJanani Sunil
Add support for the MAX22007 4 channel DAC that drives a voltage or current output on each channel. Signed-off-by: Janani Sunil <janani.sunil@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-01-11iio: dac: ds4424: drop unused include IIO consumer headerRomain Gantois
To prepare for the introduction of namespaced exports for the IIO consumer API, remove this include directive which isn't actually used by the driver. Signed-off-by: Romain Gantois <romain.gantois@bootlin.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2026-01-11iio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_sourceMiaoqian Lin
When simple_write_to_buffer() succeeds, it returns the number of bytes actually copied to the buffer. The code incorrectly uses 'count' as the index for null termination instead of the actual bytes copied. If count exceeds the buffer size, this leads to out-of-bounds write. Add a check for the count and use the return value as the index. The bug was validated using a demo module that mirrors the original code and was tested under QEMU. Pattern of the bug: - A fixed 64-byte stack buffer is filled using count. - If count > 64, the code still does buf[count] = '\0', causing an - out-of-bounds write on the stack. Steps for reproduce: - Opens the device node. - Writes 128 bytes of A to it. - This overflows the 64-byte stack buffer and KASAN reports the OOB. Found via static analysis. This is similar to the commit da9374819eb3 ("iio: backend: fix out-of-bound write") Fixes: b1c5d68ea66e ("iio: dac: ad3552r-hs: add support for internal ramp") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: David Lechner <dlechner@baylibre.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-31iio: dac: adi-axi-dac: Make use of dev_err_probe()Nuno Sá
Be consistent and use dev_err_probe() as in all other places in the .probe() path. While at it, remove the line break in the version condition. Yes, it goes over the 80 column limit but I do think the line break hurts readability in this case. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-31iio: dac: adi-axi-dac: Make use of a local struct device variableNuno Sá
Use a local struct device variable to improve readability in some code paths during probe. While at it, fix some line breaks not properly aligned to the open parenthesis. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-31iio: dac: adding support for Microchip MCP47FEB02Ariana Lazar
This is the iio driver for Microchip MCP47F(E/V)B(0/1/2)1, MCP47F(E/V)B(0/1/2)2, MCP47F(E/V)B(0/1/2)4 and MCP47F(E/V)B(0/1/2)8 series of buffered voltage output Digital-to-Analog Converters with nonvolatile or volatile memory and an I2C Interface. The families support up to 8 output channels. The devices can be 8-bit, 10-bit and 12-bit. Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-21iio: dac: ad5686: add AD5695R to ad5686_chip_info_tblKübrich, Andreas
The chip info for this variant (I2C, four channels, 14 bit, internal reference) seems to have been left out due to oversight, so ad5686_chip_info_tbl[ID_AD5695R] is all zeroes. Initialisation of an AD5695R still succeeds, but the resulting IIO device has no channels and no /dev/iio:device* node. Add the missing chip info to the table. Fixes: 4177381b4401 ("iio:dac:ad5686: Add AD5671R/75R/94/94R/95R/96/96R support") Signed-off-by: Andreas Kübrich <andreas.kuebrich@spektra-dresden.de> Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-12-06Merge tag 'char-misc-6.19-rc1' of ↵Linus Torvalds
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 ...
2025-11-24iio: dac: Convert to common field_prep() helperGeert Uytterhoeven
Drop the driver-specific field_prep() macro, in favor of the globally available variant from <linux/bitfield.h>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
2025-11-24iio: dac: ad3530r: #undef field_prep() before local definitionGeert Uytterhoeven
Prepare for the advent of a globally available common field_prep() macro by undefining the symbol before defining a local variant. This prevents redefinition warnings from the C preprocessor when introducing the common macro later. Suggested-by: Yury Norov <yury.norov@gmail.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com> Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
2025-11-09iio: dac: ad5446: Add AD5542 to the spi id tableMichael Hennerich
This adds support for the AD5542 single channel Current Source and Voltage Output DACs. It is similar to the AD5542A model so just use the same id. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Co-developed-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Fix coding style issuesNuno Sá
Fix style issues as reported by checkpatch. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Refactor header inclusionNuno Sá
Make sure include files are given in alphabetical order and that we include the ones that were missing and remove the ones we don't really use. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Make use of the cleanup helpersNuno Sá
Use the auto unlocking helpers from cleanup.h. Allows for some code simplification. While at it, don't use the ternary operator in ad5446_write_dac_powerdown() and add an helper function to write the DAC code. The reason for the function was purely to avoid having to use unreachable(). Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Make use of devm_mutex_init()Nuno Sá
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Separate I2C/SPI into different driversNuno Sá
Properly separate the I2C and SPI drivers into two different drivers living in their own source file (as usual). So that no need for the hacky ifdefery. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5456: Add missing DT compatiblesNuno Sá
Add missing of_device_id compatibles for the i2c and spi drivers. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Move to single chip_info structuresNuno Sá
Do not use an array with an enum id kind of thing. Use the more maintainable chip_info variable per chip. Adapt the probe functions to use the proper helpers (for SPI and I2c). Note that in a following patch we'll also add the chip_info variables to the of_device_id tables. Hence already use the helpers that internally use device_get_match_data(). Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Don't ignore missing regulatorNuno Sá
If the chip does not have an internal reference, do not ignore a missing regulator as we won't be able to actually provide a proper scale for the DAC. Since it's now seen as an error, flip the if() logic so errors are treated first (which is the typical pattern). Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Drop duplicated spi_id entryNuno Sá
AD5600 and AD5541A are compatible so there's no need to have a dedicated entry for ID_AD5600. Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-11-09iio: dac: ad5446: Use DMA safe buffer for transfersNuno Sá
Make sure to use DMA safe buffer. While for i2c we could be fine without them, we need it for spi anyways. As we now have DMA safe buffers, use i2c_master_send_dmasafe(). Signed-off-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2025-10-19iio: dac: ltc2688: use the auto lock APINuno Sá
Make use of the cleanup API so that we can simplify some code paths. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
generated by cgit v1.2.3 (git 2.25.1) at 2026-05-21 11:39:23 +0000