Changes in Kconfig

67f8bc848ee31831336bd478e57d2f993551902e - Merge drm/drm-fixes into drm-misc-fixes

Tue, 01 Sep 2026 09:38:51 +0200

Merge drm/drm-fixes into drm-misc-fixesLet's start the 7.3 drm-misc-fixes cycle.Signed-off-by: Maxime Ripard List of files: /linux/drivers/iio/Kconfig

93e4b3076b5f2d853462b9777d083c77fc0b7b23 - Merge tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Tue, 25 Aug 2026 18:38:50 +0200

Merge tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscPull char/misc/IIO/etc driver updates from Greg KH: "Here is the big set of char, misc, iio, counter, fpga, and other small driver subsystems for 7.3-rc1. Overall, due to some driver removals we only added a bit more code than removed, which was a nice change. Highlights in this merge request are: - Loads of IIO driver updates and additions - binder driver updates (more on that below...) - Removal of the SGI XP and GRU drivers as they are not used anymore and turn out to be pretty insecure overall - Removal of the obsolete ibmasm driver as it's not being used anymore - Coresight driver updates and additions - Mei driver udpates - Counter driver updates - FPGA driver updates - ICC driver updates - lots and lots of other tiny driver updates to resolve reported issues All of these have been in linux-next for a while"* tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (513 commits) iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF iio: adc: pac1921: fix wrong channel used in trigger handler read iio: light: gp2ap002: re-enable irq if runtime suspend fails iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes iio: light: apds9306: fix PM reference leak in apds9306_read_data() iio: gyro: mpu3050: fix sign of raw angular velocity readings iio: srf04: fix pm_runtime handling on probe error path iio: adc: ad4080: configure backend data size iio: adc: adi-axi-adc: add data size support for AD408X backend iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable iio: dac: ad5446: fix OF module device table iio: light: opt4001: Fix reversed GENMASK() arguments in fault count mask iio: light: opt4001: Reject integration times with a non-zero seconds part iio: light: opt4001: Fix incompatible pointer type passed to div_u64_rem() iio: light: opt4001: Fix power down clearing bits of the wrong register iio: light: opt4060: Fix incorrect register name in threshold read error message iio: light: opt4060: Fix pointer type passed to div_u64_rem() iio: light: opt4060: Reject integration times with a non-zero seconds part iio: light: ltrf216a: fix runtime PM reference leak in error path iio: pressure: dps310: fix NULL pointer dereference on ACPI probe ... List of files: /linux/drivers/iio/Kconfig

258ad625930ff4535ba6b438c8b49509e9a1c2dd - Merge tag 'iio-for-7.3a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Wed, 19 Aug 2026 09:45:01 +0200

Merge tag 'iio-for-7.3a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-nextJonathan writes:IIO new device support, features, cleanup for 7.3Includes a merge of 7.2-rc2 to pick up the changes aroundmod_devicetable.h and reduce resulting conflicts around includes.New device support------------------adi,ad3530R- Add support for the AD3532R and AD3532 16 channel DACs.adi,ad4080- Add support for the AD4883 ADC.adi,ad5686- Add support for AD5313R, AD5317R, AD5674, AD5687R, AD5689, AD5689R DACs over SPI- Add support for AD5316R, AD5674, AD5697R and AD5696 DACs over I2C- Significant driver refactoring prior to these additions, partly to reduce bus traffic and to add triggered buffer and gain control support. An earlier set added support for missing supplies, reset and LDAC GPIO.adi,adf41513- New driver to support this PLL frequency synthesizer that runs up to 26.5 GHz.- Included infrastructure to handle higher precision attributes with extensive testsadi,ltc2378-20- New driver supporting LTC2338, LTC2364, LTC2367, LTC2368, LT2369, LTC2370 LTC2376, LTC2377, LTC2378, LTC2379 and LTC23980 ADCs with both high speed capture via appropriate backend and conventional triggered buffer SPI capture.invensense,icm42607- New driver for this IMU.mediateck,mt6323- New driver for this PMIC ADC.microchip,mcp47a1- New driver for this I2C 6 bit DAC.nxp,mcf54415-dac- New driver for this DAC found in NXP SoCs.qst,qmc5884l- New driver for this 3 axis magnetometer. Included dt vendor entry for qst.qst,qmc6308- New driver for this 3 axis magnetometer.sensiron,slf3s- New driver for this liquid flow sensor. Includes adding IIO_VOLUMEFLOW channel type.st,vl53l1x- Refactors to improve readability.ti,ads112c14- New driver supporting the ADS112C14 and ADS122C14 ADCs. These bring some new ABI for input chopping, particular useful for resistive sensors like thermocouples or Wheatstone bridges.- Support CRC8 detection of corruption on the bus.- Support buffered reads.ti,tmp117- (trivial) Add support for the tmp119 temperature sensor.xilinx,versal-sysmon- New ADC driver for this block found on various FPGAs including various bus interfaces, threshold and oversampling support.dt binding updates------------------new shared bindings- excitation-channels and excitation-current-nanoamp allow per channel specification of currents used for resistive sensor measurement.- reference-sources property to allow selection of a per channel reference.rockchip,saradc- Add RV1106 which is compatible with the RV3588.Features--------buffer-dmaengine- Allow cyclic buffers, useful for repeating sequence generation with DACs.devantech,dmard09- Implement read back of channel scale - previously interface always returned an error.hid,sensors-als- Enable separate channel scaling for hardware that supports it.invensense,timestamp library- Various precision improvements.invensense,icm42600- Add support for hwfifo watermark interfaces.taos,tcs3472- Support wait time and sampling frequency control.Cleanups, minor fixes---------------------Minor cleanups not mentioned at all in this summary suchas white space fixes or typos.Affecting various drivers- Cleanup of conditionals that had no affect.- Drop some runtime pm local wrappers as now runtime_pm does the mark_last_busy part inside the put, these provide no useful code deduplication or readability advantages over directly calling the runtime_pm functions.- Return 0 from write_raw() on success.- Use of dev_err_probe() to simplify code and sometimes provide useful info for deferred probe debugging.- Drop some redundant error prints where the called function already provides information on errors.- Make some read only arrays in functions static.- Fix up missing handling of regcache_sync() errors.- Drop some false kernel-doc markings.- Add missing MODULE_DEVICE_TABLE for some of_match_id tables.- Use local variables for things like the struct device to shorten and improve readability of code.- Drop some unused structure elements.- Reorder dds.h macro parameters to be inline with others.- Header reorders and IWYU. Often part of a more significant series.- Remove abstractions designed to allow a driver to support multiple device types, when they have been around a long time and only the original part showed up.- Initialize spi_device_id arrays using member names following dropping of driver data from drivers that didn't actually use it.- Catch up with i2c_device_id tables added since previous effort to use named initializers for all those.- Use kernel types in a few places instead of standard C ones or bare unsigned.Misc- Update Xilinx AMS maintainer.- Update email address for Maxwell Doose.- Update email address for Siratul Islam.- Update email address for Tomasz Duszynski and re-add Tomasz to various maintainer entries.Docs- Encourage use of differential channel naming even when there is no flexibility in input to differential pair mapping. Intended to provide a strong signal to userspace that a channel is differential.adi,ad_sigma_delta- Allow COMPILE_TEST without any users.adi,ad2s1201- Refactor trigger handler to avoid mix of guard() and goto.adi,ad5686- Avoid potential NULL dereference is user forces a driver bind.adi,ad5696- Add a couple of missing entries to the of_match_id table and update binding to match.atmel,ad91_adc- Use const char * for DT string property allowing a cast to be dropped.avia,hx711- Various refactors and cleanup to enable support of additional parts (to come)- Add missing supply and gpio dt-bindings.bosch,bmc150- Harden against device reporting too large a FIFO sample count.- Use FIELD_PREP() / FIELD_GET() to improve readability.freescale,fxls8962af- Harden against device reporting too large a FIFO sample count.hid-sensors-*- Reorder probe to not expose userspace interfaces until the rest of the setup is done to avoid potentially dropping data.honeywell,abp2030pa- Drop an unreachable return.invensens,icm45600- Harden against bad value of FIFO sample count from device.- Use i2c_match_data if firmware table sourced match data isn't available.nxp,mpl1115- Ensure runtime_pm is balanced on error in probe.rohm,bm1390- Make the driver slightly more likely to recover from transient errors.sensiron,sgp30- Handle thread creation errors.st,lsm6dsx- Update the enable mask when doing sensor fusion to avoid incorrect fifo data handling.st,stm32-dfsdm- Treat dt flags as booleans.ti,ads1015- Switch to devm helpers which simplified code and closed a resource leak.ti,opt3001- Split complicated opt3001_get_processed() logic into irq an no irq helper functions.- Use devm to simplify code.- Use guard() to simplify code.- Reorder probe so final call exposes userspace interfaces.- Various other more minor cleanuptaos,tsl2772- Fix calibscale readback to check right channel type.taos,tsl2583- Use sysfs_emit() and sysfs_emit_at() to replace open coded equivalents.* tag 'iio-for-7.3a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (232 commits) iio: dac: mcp47a1: add support for new device dt-bindings: iio: dac: add support for mcp47a1 iio: Update email for Maxwell Doose iio: imu: st_lsm6dsx: Update enable mask when using sensor fusion iio: light: cm32181: return zero after writing calibscale iio: flow: add Sensirion SLF3S liquid flow sensor driver iio: core: add IIO_VAL_DECIMAL64_FEMTO format type dt-bindings: iio: flow: add Sensirion SLF3S liquid flow sensor iio: types: add IIO_VOLUMEFLOW channel type iio: ABI: Encourage differential voltage ABI usage iio: adc: ltc2378: Add support for LTC2338-18 iio: adc: ltc2378: Enable triggered buffer data capture iio: adc: ltc2378: Enable high-speed data capture iio: adc: ltc2378: Add support for LTC2378-20 and similar ADCs dt-bindings: iio: adc: Add ltc2378 iio: magnetometer: ak8974: remove conditional return with no effect iio: light: tsl2583: remove conditional return with no effect iio: adc: rcar-gyroadc: remove rcar_gyroadc_set_power() helper iio: light: vcnl4000: remove vcnl4000_set_pm_runtime_state() helper iio: light: vcnl4035: remove vcnl4035_set_pm_runtime_state() helper ... List of files: /linux/drivers/iio/Kconfig

d240b0b8a1ceeacc618890de971d9f4e40661c27 - iio: flow: add Sensirion SLF3S liquid flow sensor driver

Tue, 28 Jul 2026 23:49:43 +0200

iio: flow: add Sensirion SLF3S liquid flow sensor driverAdd a driver for the Sensirion SLF3S family of digitalliquid-flow sensors on I2C. Currently supported variants areSLF3S-0600F, SLF3S-1300F and SLF3S-4000B; they share the sameregister map and differ only in flow-scale factor and calibratedmeasurement range. The variant (and therefore the scale) isauto-detected from the product-information register at probe time;a sensor reporting an unknown sub-type falls back to the variantnamed in the device tree / I2C table, so a drop-in replacement partkeeps working on a kernel that does not know its sub-type yet.Each measurement frame returns a 16-bit signed flow value, a16-bit signed temperature reading and a status word, eachprotected by a CRC-8 byte. The driver exposes the flow rate asIIO_VOLUMEFLOW and the temperature as IIO_TEMP via the standardIIO read_raw / read_scale interface.The volume-flow scale is reported in m^3/s. As the per-LSB scaleis on the order of 1e-12 m^3/s, it is emitted as a 64-bitfixed-point value with femto (1e-15) resolution(IIO_VAL_DECIMAL64_FEMTO) so the small SI value keeps fullprecision. This relies on the IIO_VAL_DECIMAL64_FEMTO format typeadded earlier in this series.The active calibration medium can be switched at runtime betweenthe factory-calibrated water and isopropyl-alcohol modes via thein_volumeflow_medium sysfs attribute; the sensor starts in watermode after probe.The sensor has no low-power state of its own, so system suspendstops the measurement and disables the vdd supply; resume powersthe sensor back up, waits out the power-up time and restarts themeasurement with the previously active medium, following thescd30/scd4x precedent.This driver also creates the drivers/iio/flow/ subdirectory andthe corresponding Kconfig/Makefile glue.Signed-off-by: Wadim Mueller Signed-off-by: Jonathan Cameron List of files: /linux/drivers/iio/Kconfig

c771600c6af14749609b49565ffb4cac2959710d - Merge drm/drm-next into drm-intel-gt-next

Wed, 05 Feb 2025 10:29:14 +0100

Merge drm/drm-next into drm-intel-gt-nextWe need4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope")in order to land a i915 PMU simplification and a fix. That landed in 6.12and we are stuck at 6.9 so lets bump things forward.Signed-off-by: Tvrtko Ursulin List of files: /linux/drivers/iio/Kconfig

36ec807b627b4c0a0a382f0ae48eac7187d14b2b - Merge branch 'next' into for-linus

Fri, 20 Sep 2024 10:24:24 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.12 merge window. List of files: /linux/drivers/iio/Kconfig

f057b57270c2a17d3f45c177e9434fa5745caa48 - Merge branch 'ib/6.11-rc6-matrix-keypad-spitz' into next

Fri, 06 Sep 2024 06:49:07 +0200

Merge branch 'ib/6.11-rc6-matrix-keypad-spitz' into nextBring in changes removing support for platform data from matrix-keypaddriver. List of files: /linux/drivers/iio/Kconfig

66e72a01b60ae6950ddbb3585fdc1424d303e14b - Merge tag 'v6.11-rc1' into clk-meson-next

Mon, 29 Jul 2024 16:32:02 +0200

Merge tag 'v6.11-rc1' into clk-meson-nextLinux 6.11-rc1 List of files: /linux/drivers/iio/Kconfig

ee057c8c194b9283f4137b253b70e292693a39f0 - Merge tag 'v6.11-rc3' into trace/ring-buffer/core

Wed, 14 Aug 2024 22:56:42 +0200

Merge tag 'v6.11-rc3' into trace/ring-buffer/coreThe "reserve_mem" kernel command line parameter has been pulled intov6.11. Merge the latest -rc3 to allow the persistent ring buffer memory tobe able to be mapped at the address specified by the "reserve_mem" commandline parameter.Signed-off-by: Steven Rostedt (Google) List of files: /linux/drivers/iio/Kconfig

c8faf11cd192214e231626c3ee973a35d8fc33f2 - Merge tag 'v6.11-rc1' into for-6.12

Tue, 30 Jul 2024 21:30:11 +0200

Merge tag 'v6.11-rc1' into for-6.12Linux 6.11-rc1 List of files: /linux/drivers/iio/Kconfig

ed7171ff9fabc49ae6ed42fbd082a576473836fc - Merge drm/drm-next into drm-xe-next

Fri, 16 Aug 2024 19:05:54 +0200

Merge drm/drm-next into drm-xe-nextGet drm-xe-next on v6.11-rc2 and synchronized with drm-intel-next forthe display side. This resolves the current conflict for theenable_display module parameter and allows further pending refactors.Signed-off-by: Lucas De Marchi List of files: /linux/drivers/iio/Kconfig

5c61f59824b5e46516ea5d0543ad7a8871567416 - Merge drm/drm-next into drm-misc-next

Mon, 12 Aug 2024 14:14:18 +0200

Merge drm/drm-next into drm-misc-nextGet drm-misc-next to the state of v6.11-rc2.Signed-off-by: Thomas Zimmermann List of files: /linux/drivers/iio/Kconfig

3663e2c4bc45fcdc71931fcbfcbfbf9b71f55c83 - Merge drm/drm-next into drm-intel-next

Thu, 01 Aug 2024 12:06:09 +0200

Merge drm/drm-next into drm-intel-nextSync with v6.11-rc1 in general, and specifically get the newBACKLIGHT_POWER_ constants for power states.Signed-off-by: Jani Nikula List of files: /linux/drivers/iio/Kconfig

4436e6da008fee87d54c038e983e5be9a6baf8fb - Merge branch 'linus' into x86/mm

Fri, 02 Aug 2024 14:10:55 +0200

Merge branch 'linus' into x86/mmBring x86 and selftests up to date List of files: /linux/drivers/iio/Kconfig

a1ff5a7d78a036d6c2178ee5acd6ba4946243800 - Merge drm/drm-fixes into drm-misc-fixes

Tue, 30 Jul 2024 09:09:23 +0200

Merge drm/drm-fixes into drm-misc-fixesLet's start the new drm-misc-fixes cycle by bringing in 6.11-rc1.Signed-off-by: Maxime Ripard List of files: /linux/drivers/iio/Kconfig

acc5965b9ff8a1889f5b51466562896d59c6e1b9 - Merge tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Sat, 20 Jul 2024 00:55:08 +0200

Merge tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscPull char / misc and other driver updates from Greg KH: "Here is the "big" set of char/misc and other driver subsystem changes for 6.11-rc1. Nothing major in here, just loads of new drivers and updates. Included in here are: - IIO api updates and new drivers added - wait_interruptable_timeout() api cleanups for some drivers - MODULE_DESCRIPTION() additions for loads of drivers - parport out-of-bounds fix - interconnect driver updates and additions - mhi driver updates and additions - w1 driver fixes - binder speedups and fixes - eeprom driver updates - coresight driver updates - counter driver update - new misc driver additions - other minor api updates All of these, EXCEPT for the final Kconfig build fix for 32bit systems, have been in linux-next for a while with no reported issues. The Kconfig fixup went in 29 hours ago, so might have missed the latest linux-next, but was acked by everyone involved"* tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (330 commits) misc: Kconfig: exclude mrvl-cn10k-dpi compilation for 32-bit systems misc: delete Makefile.rej binder: fix hang of unregistered readers misc: Kconfig: add a new dependency for MARVELL_CN10K_DPI virtio: add missing MODULE_DESCRIPTION() macro agp: uninorth: add missing MODULE_DESCRIPTION() macro spmi: add missing MODULE_DESCRIPTION() macros dev/parport: fix the array out-of-bounds risk samples: configfs: add missing MODULE_DESCRIPTION() macro misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver misc: keba: Fix missing AUXILIARY_BUS dependency slimbus: Fix struct and documentation alignment in stream.c MAINTAINERS: CC dri-devel list on Qualcomm FastRPC patches misc: fastrpc: use coherent pool for untranslated Compute Banks misc: fastrpc: support complete DMA pool access to the DSP misc: fastrpc: add missing MODULE_DESCRIPTION() macro misc: fastrpc: Add missing dev_err newlines misc: fastrpc: Use memdup_user() nvmem: core: Implement force_ro sysfs attribute nvmem: Use sysfs_emit() for type attribute ... List of files: /linux/drivers/iio/Kconfig

a23e1966932464e1c5226cb9ac4ce1d5fc10ba22 - Merge branch 'next' into for-linus

Mon, 15 Jul 2024 23:03:44 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.11 merge window. List of files: /linux/drivers/iio/Kconfig

14c4dc8bb620c4c75b06d267a542eb1ac44cdd29 - Merge tag 'iio-for-6.11b' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Thu, 04 Jul 2024 11:04:20 +0200

Merge tag 'iio-for-6.11b' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-nextJonathan writes:IIO: 2nd set of new device support, features and cleanup for 6.11The big one here is we finally have Paul Cercueil's (and others)DMA buffer support for IIO devices enabling high speed zerocopy transfer of data to and from sensors supported by IIO (and forexample USB). This should aid with upstream support of a range ofhigher performance ADCs and DACs.Two merges from other trees- spi/spi_devm_optimize used for simplification in ad7944.- dmaengine/topic_dma_vec to enable the DMABUF series.One feature with impact outside IIO.- Richer set of dev_err_probe() like helpers to cover ERR_PTR() cases.New device support==================adi,ad7173- Add support for AD4111, AD4112, AD4114, AD4115 and ADC4116 pseudo differential ADCs. Major driver rework was needed to enabled these.adi,ad7944- Use devm_spi_optimize_message() to avoid a local devm cleanup callback. This is the example case from the patch set, others will follow.mediatek,mt6359-auxadc- New driver for this ADC IP found in MT6357, MT6358 and MT6359 PMICs.st,accel- Add support for the LIS2DS12 accelerometerti,ads1119- New driver for this 16 bit 2-differential or 4-single ended channel ADC.Features========dt-bindings- Introduce new common-mode-channel property to help handle pseudo differential ADCs where we have something that looks like one side of differential input, but which is only suited for use with a slow moving reference.adi,adf4350- Support use as a clock provider.iio-hmwon- Support reading of labels from IIO devices by their consumers and use this in the hwmon bridge.Cleanup and minor fixes=======================Treewide- Use regmap_clear_bits() / regmap_set_bits() to simplify open coded equivalents.- Use devm_regulator_get_enable_read_voltage() to replace equivalent opencoded boilerplate. In some cases enabled complete conversion to devm handling and removal of explicit remove() callbacks.- Introduce dev_err_ptr_probe() and other variants and make use of of them in a couple of examples driver cleanups. Will find use in many more drivers soon.adi,ad7192- Introduce local struct device *dev and use dev_err_probe() to give more readable code.adi,adi-axi-adc/dac- Improved consistency of messages using dev_err_probe()adi,adis- Split the trigger handling into cases that needed paging and those that don't resulting in more readable code.- Use cleanup.h to simplify error paths via scoped cleanup.- Add adis specific lock helpers and make use of them in a number of drivers.adi,ad7192- Update maintainer (Alisa-Dariana Roman)adi,ad7606- dt-binding cleanup.avago,apds9306- Add a maintainer entry (Subhajit Ghosh)linear,ltc2309- Fix a wrong endian type.st,stm32-dfsdm- Fix a missing port property in the dt-binding.st,sensors- Relax whoami match failure to a warning print rather than probe failure. This enables fallback compatibles to existing parts from those that don't necessarily even exit yet.* tag 'iio-for-6.11b' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (112 commits) iio: adc: ad7173: Fix uninitialized symbol is_current_chan iio: adc: Add support for MediaTek MT6357/8/9 Auxiliary ADC math.h: Add unsigned 8 bits fractional numbers type dt-bindings: iio: adc: Add MediaTek MT6359 PMIC AUXADC iio: common: scmi_iio: convert to dev_err_probe() iio: backend: make use of dev_err_cast_probe() iio: temperature: ltc2983: convert to dev_err_probe() dev_printk: add new dev_err_probe() helpers iio: xilinx-ams: Add labels iio: adc: ad7944: use devm_spi_optimize_message() Documentation: iio: Document high-speed DMABUF based API iio: buffer-dmaengine: Support new DMABUF based userspace API iio: buffer-dma: Enable support for DMABUFs iio: core: Add new DMABUF interface infrastructure MAINTAINERS: Update AD7192 driver maintainer iio: adc: ad7192: use devm_regulator_get_enable_read_voltage iio: st_sensors: relax WhoAmI check in st_sensors_verify_id() MAINTAINERS: Add AVAGO APDS9306 dt-bindings: iio: adc: adi,ad7606: comment and sort the compatible names dt-bindings: iio: adc: adi,ad7606: add missing datasheet link ... List of files: /linux/drivers/iio/Kconfig

3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f - iio: core: Add new DMABUF interface infrastructure

Thu, 20 Jun 2024 14:27:22 +0200

iio: core: Add new DMABUF interface infrastructureAdd the necessary infrastructure to the IIO core to support a newoptional DMABUF based interface.With this new interface, DMABUF objects (externally created) can beattached to a IIO buffer, and subsequently used for data transfer.A userspace application can then use this interface to share DMABUFobjects between several interfaces, allowing it to transfer data in azero-copy fashion, for instance between IIO and the USB stack.The userspace application can also memory-map the DMABUF objects, andaccess the sample data directly. The advantage of doing this vs. theread() interface is that it avoids an extra copy of the data between thekernel and userspace. This is particularly userful for high-speeddevices which produce several megabytes or even gigabytes of data persecond.As part of the interface, 3 new IOCTLs have been added:IIO_BUFFER_DMABUF_ATTACH_IOCTL(int fd): Attach the DMABUF object identified by the given file descriptor to the buffer.IIO_BUFFER_DMABUF_DETACH_IOCTL(int fd): Detach the DMABUF object identified by the given file descriptor from the buffer. Note that closing the IIO buffer's file descriptor will automatically detach all previously attached DMABUF objects.IIO_BUFFER_DMABUF_ENQUEUE_IOCTL(struct iio_dmabuf *): Request a data transfer to/from the given DMABUF object. Its file descriptor, as well as the transfer size and flags are provided in the "iio_dmabuf" structure.These three IOCTLs have to be performed on the IIO buffer's filedescriptor, obtained using the IIO_BUFFER_GET_FD_IOCTL() ioctl.Signed-off-by: Paul Cercueil Co-developed-by: Nuno Sa Signed-off-by: Nuno Sa Link: https://patch.msgid.link/20240620122726.41232-4-paul@crapouillou.netSigned-off-by: Jonathan Cameron List of files: /linux/drivers/iio/Kconfig

6f47c7ae8c7afaf9ad291d39f0d3974f191a7946 - Merge tag 'v6.9' into next

Tue, 28 May 2024 06:37:18 +0200

Merge tag 'v6.9' into nextSync up with the mainline to bring in the new cleanup API. List of files: /linux/drivers/iio/Kconfig