iio:cdc:ad7150: Move driver out of staging.

This capacitance to digital converter (CDC) driver is compliant with
the IIO ABI. Note, not all features supported (e.g. window event modes)
but the driv

iio:cdc:ad7150: Move driver out of staging.

This capacitance to digital converter (CDC) driver is compliant with
the IIO ABI. Note, not all features supported (e.g. window event modes)
but the driver should be in a useful functional state.

The cleanup was done against QEMU emulation of the device rather than
actual hardware. Whilst this was a bit of an experiment, it made it
easy to confirm that the driver remained in a consistent working state
through the various refactors. If it worked in the first place, it
should still be working after this cleanup.

Given some IIO drivers require expensive hardware setups, (not particularly
true with this one) the use of QEMU may provide a viable way forward
for providing testing during code changes where previously we'd had
to rely on sharp eyes and crossed fingers.

Note, no explicit MAINTAINERS entry as it will be covered by the
generic catch-alls for ADI and IIO drivers which are sufficient.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210314181511.531414-25-jic23@kernel.org

show more ...

Merge tag 'iio-for-5.13a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

1st set of IIO/counter device support, features and cleanup in the 5.13 cyc

Merge tag 'iio-for-5.13a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

1st set of IIO/counter device support, features and cleanup in the 5.13 cycle

Big set in here from Alexandru Ardelean enabling multiple buffer support.
This includes providing a new directory per buffer that combines
what was previously in buffer/ and scan_elements/. Old interfaces still
in place for compatiblity.

Note immuatable branch for scmi patches to allow for some significant
rework going on in that subsystem. Merge required updating to reflect
some changes in IIO.

Late rebase to fix some wrong fixes tags due to some earlier rebases
made necessary by messing up the immutable branch.

IIO New Device Support
* adi,ad5686
- Add info to support AD5673R and AD5677R
* bosch,bmi088
- New driver supporting this accelerometer + gyroscope
* cros_ec_mkbp
- New driver for this proximity sensor that exposes a 'front'
sensor. Very simple switch like device, but driver allows it
to share interface with more sophisticated proximity sensors.
* iio_scmi
- New driver to support ARM SCMI protocol to expose underlying
accelerometers and gyroscopes via this firmware interface.
* st,st_magn
- Add ID for IISMDC magnetometer.
* ti,ads131e0
- New driver supporting ads131e04, ads131e06 and ads131e08 24 bit ADCs

Counter New Device Support
* IRQ or GPIO based counter
- New driver for a conceptually simple counter that uses interrupts
to perform the count.

Features
* core
- Dual buffer supprt including:
Various helpers to centralize handling of bufferer related elements.
Document existing and new IOCTLs
Register the IIO chrdev only if it can actually be used for anything.
Rework attribute group creation in the core (lots of patches)
Merge buffer/ and scan_elements/ entries into one list + maintain
backwards compatible set.
Introduce the internal logic and IOCTL to allow multiple buffers
+ access to an anon FD per buffer to actually read from it.
Tidy up tools/iio/iio_generic_buffer and switch to new interfaces.
Update ABI docs.
A few follow up fixes, unsuprising as this was a huge bit of rework.
- Move common case setting of trig->parent to the core.
- Provide an iio_read_channel_processed_scale() to avoid loss of
precision from iio_read_channel_processed() then applying integer
scale. Use it in ntc_thermistor driver in hwmon.
- Allow drivers to specify labels from elsewhere than DT. Use it for
bmc150 and kxcjk-1013 labels related to position on 2 in one tablets.
- Document label usage for proximity and accelerometer sensors.
- Some local variable renames for consistency
tools
- Add -a parameter to iio_event_monitor to allow autoenabling of events.
* acpi_als
- Add trigger support for devices that don't support notification method.
* adi,ad7124
- Allow more than 8 channels. This is a complex little device, but is
capable of supporting up to 16 channels if the share certain
configuration settings.
* hrtimer-trigger
- Support sampling frequency below 1Hz.
* mediatek,mt8195-auxadc
- Add compatible to binding docs (always also includes mt8173)
* st,stm32-adc
- Enable timetamps when not using DMA.
* vishay,vcnl3020
- Sampling frequency control.

Cleanup and minor fixes:
* treewide
- Use some getter and setter functions instead of opencoding.
- Set of fixes for pointless casts in various drivers.
- Avoid wrong kernel-doc marking on comment blocks.
- Fix various other minor kernel-doc issues shown by W=1
* core
- Use a signed temporary for IIO_VAL_FRACTIONAL_LOG2 to avoid odd casts.
- Fix IIO_VAL_FRACTIONAL_LOG2 for values between -1.0 and 0.0
- Add unit tests for iio_format_value()
* docs
- Fix formatting/typos in iio_configfs.rst and buffers.rst
- Add documentation of index in buffers.rst
- Fix scan element description
- Avoid some issues with HTML generation from ABI docs by moving
duplicated defintions to more generic files.
- Drop reference to long dead mailing list.
* 104-quad
- Remove left over deprecated IIO counter ABI.
* adi,adi-axi-adc
- Fix wrong bit of docs.
* adi,ad5791
- Typos
* adi,ad9834
- Switch to device managed functions in probe.
* adi,adis*
- Add and use helpers for locking to reduced duplication.
* adi,adis16480
- Fix calculation of sampling frequency when using pulse per second input.
* adi,adis16475
- Calculate the IMU scaled internal sampling rate and runtime depending
on sysfs based configuration rather than getting from DT. Drop now
unnecessary property from DT bindings doc.
* cros_ec
- Fix result of a series of recent changes that means extended buffer
attributes turn up in the wrong place. Too complex to revert the
various patches unfortunately so this is a bit messy.
* fsl,mma3452
- Indentation cleanup.
* hid-sensors
- Size of storage needs to increase for some parts when using quaternions.
- Move the get sensistivity attribute to hid-sensors-common to reduce
duplication. Enable it for more device types.
- Correctly handle relative sensitivity if reported that way including
documenting the new ABI.
* maxim,max517
- Use device managed functions in probe.
* mediatek,mt6360-adc
- Use asm/unaligned.h instead of directly including
unaligned/be_byteshift.h
* novuton,npcm-adc
- Local lock instead of missusing mlock.
* semtech,sx9500
- Typos
* st,sensor
- typo fix
* st,spear-adc
- Local lock instead of missusing mlock.
* st,stm32-adc
- Long standing HAS_IOMEM dependency fix.
* st,stm32-counter
- Remove left over deprecated IIO counter ABI.
* ti,palmas-adc
- Local lock instead of missusing mlock.
* ti,tmp007
- Switch to device managed functions in probe.

Other
* MAINTAINERS
- Move Peter Meerwald-Stadler to Credits at his request

* tag 'iio-for-5.13a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (119 commits)
iio: acpi_als: Add trigger support
iio: acpi_als: Add local variable dev in probe
iio: acpi_als: Add timestamp channel
iio: adc: ad7292: Modify the bool initialization assignment
iio: cros: unify hw fifo attributes without API changes
iio: kfifo: add devm_iio_triggered_buffer_setup_ext variant
iio: event_monitor: Enable events before monitoring
dt-bindings: iio: adc: Add compatible for Mediatek MT8195
iio:magnetometer: Add Support for ST IIS2MDC
dt-bindings: iio: st,st-sensors add IIS2MDC.
staging: iio: ad9832: kernel-doc fixes
iio:dac:max517.c: Use devm_iio_device_register()
iio:cros_ec_sensors: Fix a wrong function name in kernel doc.
iio: buffer: kfifo_buf: kernel-doc, typo in function name.
iio: accel: sca3000: kernel-doc fixes. Missing - and wrong function names.
iio: adc: adi-axi-adc: Drop false marking for kernel-doc
iio: adc: cpcap-adc: kernel-doc fix - that should be _ in structure name
iio: dac: ad5504: fix wrong part number in kernel-doc structure name.
iio: dac: ad5770r: kernel-doc fix case of letter R wrong in structure name
iio: adc: ti-adc084s021: kernel-doc fixes, missing function names
...

show more ...

iio: Add basic unit test for iio_format_value()

The IIO core provides a function to do formatting of fixedpoint numbers.

In the past there have been some issues with the implementation of the
funct

iio: Add basic unit test for iio_format_value()

The IIO core provides a function to do formatting of fixedpoint numbers.

In the past there have been some issues with the implementation of the
function where for example negative numbers were not handled correctly.

Introduce a basic unit test based on kunit that tests the function and
ensures that the generated output matches the expected output.

This gives us some confidence that future modifications to the function
implementation will not break ABI compatibility.

To run the unit tests follow the kunit documentation and add

CONFIG_IIO=y
CONFIG_IIO_TEST_FORMAT=y

to the .kunitconfig and run

> ./tools/testing/kunit/kunit.py run
Configuring KUnit Kernel ...
Building KUnit Kernel ...
Starting KUnit Kernel ...
============================================================
======== [PASSED] iio-format ========
[PASSED] iio_test_iio_format_value_integer
[PASSED] iio_test_iio_format_value_fixedpoint
[PASSED] iio_test_iio_format_value_fractional
[PASSED] iio_test_iio_format_value_fractional_log2
[PASSED] iio_test_iio_format_value_multiple
============================================================
Testing complete. 21 tests run. 0 failed. 0 crashed.
Elapsed time: 8.242s total, 0.001s configuring, 3.865s building, 0.000s running

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201215191743.2725-3-lars@metafoo.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 5.12 merge window.

Merge tag 'v5.11' into next

Merge with mainline to get latest APIs and device tree bindings.

Merge remote-tracking branch 'spi/for-5.10' into spi-linus

Merge remote-tracking branch 'asoc/for-5.10' into asoc-linus

Merge branches 'for-next/kvm-build-fix', 'for-next/va-refactor', 'for-next/lto', 'for-next/mem-hotplug', 'for-next/cppc-ffh', 'for-next/pad-image-header', 'for-next/zone-dma-default-32-bit', 'for-nex

Merge branches 'for-next/kvm-build-fix', 'for-next/va-refactor', 'for-next/lto', 'for-next/mem-hotplug', 'for-next/cppc-ffh', 'for-next/pad-image-header', 'for-next/zone-dma-default-32-bit', 'for-next/signal-tag-bits' and 'for-next/cmdline-extended' into for-next/core

* for-next/kvm-build-fix:
: Fix KVM build issues with 64K pages
KVM: arm64: Fix build error in user_mem_abort()

* for-next/va-refactor:
: VA layout changes
arm64: mm: don't assume struct page is always 64 bytes
Documentation/arm64: fix RST layout of memory.rst
arm64: mm: tidy up top of kernel VA space
arm64: mm: make vmemmap region a projection of the linear region
arm64: mm: extend linear region for 52-bit VA configurations

* for-next/lto:
: Upgrade READ_ONCE() to RCpc acquire on arm64 with LTO
arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y
arm64: alternatives: Remove READ_ONCE() usage during patch operation
arm64: cpufeatures: Add capability for LDAPR instruction
arm64: alternatives: Split up alternative.h
arm64: uaccess: move uao_* alternatives to asm-uaccess.h

* for-next/mem-hotplug:
: Memory hotplug improvements
arm64/mm/hotplug: Ensure early memory sections are all online
arm64/mm/hotplug: Enable MEM_OFFLINE event handling
arm64/mm/hotplug: Register boot memory hot remove notifier earlier
arm64: mm: account for hotplug memory when randomizing the linear region

* for-next/cppc-ffh:
: Add CPPC FFH support using arm64 AMU counters
arm64: abort counter_read_on_cpu() when irqs_disabled()
arm64: implement CPPC FFH support using AMUs
arm64: split counter validation function
arm64: wrap and generalise counter read functions

* for-next/pad-image-header:
: Pad Image header to 64KB and unmap it
arm64: head: tidy up the Image header definition
arm64/head: avoid symbol names pointing into first 64 KB of kernel image
arm64: omit [_text, _stext) from permanent kernel mapping

* for-next/zone-dma-default-32-bit:
: Default to 32-bit wide ZONE_DMA (previously reduced to 1GB for RPi4)
of: unittest: Fix build on architectures without CONFIG_OF_ADDRESS
mm: Remove examples from enum zone_type comment
arm64: mm: Set ZONE_DMA size based on early IORT scan
arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges
of: unittest: Add test for of_dma_get_max_cpu_address()
of/address: Introduce of_dma_get_max_cpu_address()
arm64: mm: Move zone_dma_bits initialization into zone_sizes_init()
arm64: mm: Move reserve_crashkernel() into mem_init()
arm64: Force NO_BLOCK_MAPPINGS if crashkernel reservation is required
arm64: Ignore any DMA offsets in the max_zone_phys() calculation

* for-next/signal-tag-bits:
: Expose the FAR_EL1 tag bits in siginfo
arm64: expose FAR_EL1 tag bits in siginfo
signal: define the SA_EXPOSE_TAGBITS bit in sa_flags
signal: define the SA_UNSUPPORTED bit in sa_flags
arch: provide better documentation for the arch-specific SA_* flags
signal: clear non-uapi flag bits when passing/returning sa_flags
arch: move SA_* definitions to generic headers
parisc: start using signal-defs.h
parisc: Drop parisc special case for __sighandler_t

* for-next/cmdline-extended:
: Add support for CONFIG_CMDLINE_EXTENDED
arm64: Extend the kernel command line from the bootloader
arm64: kaslr: Refactor early init command line parsing

show more ...

Merge remote-tracking branch 'origin/master' into perf/core

Further perf/core patches will depend on:

d3f7b1bb2040 ("mm/gup: fix gup_fast with dynamic page table folding")

which is already in Li

Merge remote-tracking branch 'origin/master' into perf/core

Further perf/core patches will depend on:

d3f7b1bb2040 ("mm/gup: fix gup_fast with dynamic page table folding")

which is already in Linus' tree.

show more ...

Merge branch 'linus' into perf/kprobes

Conflicts:
include/asm-generic/atomic-instrumented.h
kernel/kprobes.c

Use the upstream atomic-instrumented.h checksum, and pick
the kprobes version of kerne

Merge branch 'linus' into perf/kprobes

Conflicts:
include/asm-generic/atomic-instrumented.h
kernel/kprobes.c

Use the upstream atomic-instrumented.h checksum, and pick
the kprobes version of kernel/kprobes.c, which effectively
reverts this upstream workaround:

645f224e7ba2: ("kprobes: Tell lockdep about kprobe nesting")

Since the new code *should* be fine without nesting.

Knock on wood ...

Signed-off-by: Ingo Molnar <mingo@kernel.org>

show more ...

Merge drm/drm-next into drm-intel-next-queued

Catch up with v5.10-rc2 and drm-misc-next.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge branch 'core/urgent' into core/entry

Pick up the entry fix before further modifications.

Merge drm/drm-next into drm-misc-next

Daniel needs -rc2 in drm-misc-next to merge some patches

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Merge tag 'v5.10-rc1' into kvmarm-master/next

Linux 5.10-rc1

Signed-off-by: Marc Zyngier <maz@kernel.org>

Merge tag 'drm-intel-fixes-2020-10-29' into gvt-fixes

Backmerge for 5.10-rc1 to apply one extra APL fix.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

Merge tag 'v5.10-rc1' into regulator-5.10

Linux 5.10-rc1

Merge tag 'v5.10-rc1' into spi-5.10

Linux 5.10-rc1

Merge tag 'v5.10-rc1' into asoc-5.10

Linux 5.10-rc1

Merge tag 'staging-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / IIO driver updates from Greg KH:
"Here is the large set of staging and IIO driver updates

Merge tag 'staging-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / IIO driver updates from Greg KH:
"Here is the large set of staging and IIO driver updates for 5.10-rc1.

Included in here are:

- new IIO drivers

- new IIO driver frameworks

- various IIO driver fixes and updates

- IIO device tree conversions to yaml

- so many minor staging driver coding style cleanups

- most cdev driver moved out of staging

- no staging drivers added or removed

Full details are in the shortlog.

All of these have been in linux-next for a while with no reported
issues"

* tag 'staging-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (476 commits)
staging: comedi: check validity of wMaxPacketSize of usb endpoints found
staging: wfx: improve robustness of wfx_get_hw_rate()
staging: wfx: drop unicode characters from strings
staging: wfx: gpiod_get_value() can return an error
staging: wfx: increase robustness of hif_generic_confirm()
staging: wfx: wfx_init_common() returns NULL on error
staging: wfx: standardize the error when vif does not exist
staging: wfx: check memory allocation
staging: wfx: improve error handling of hif_join()
staging: dpaa2-switch: add a dpaa2_switch prefix to all functions in ethsw.c
staging: dpaa2-switch: add a dpaa2_switch_ prefix to all functions in ethsw-ethtool.c
staging: rtl8188eu: Fix long lines
dt-bindings: staging: wfx: silabs,wfx yaml conversion
staging: wfx: update copyrights dates
staging: wfx: fix QoS priority for slow buses
staging: wfx: fix BA sessions for older firmwares
staging: wfx: remove remaining code of 'secure link' feature
staging: wfx: fix handling of MMIC error
staging: vchiq: Fix list_for_each exit tests
staging: greybus: use __force when assigning __u8 value to snd_ctl_elem_type_t
...

show more ...

Merge tag 'iio-for-5.10c' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

3rd set of new device support features and cleanup for IIO in the 5.10 cycl

Merge tag 'iio-for-5.10c' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

3rd set of new device support features and cleanup for IIO in the 5.10 cycle.

A late set given it seems the 5.10 cycle is going to start a bit later
than expected and quite a bit came in. Includes some late breaking
fixes that can wait for the merge window.

New device support
* ad9467
- ad9434 support including dt bindings update
- ad9265 support including dt bindings update

Yaml conversion
* amlogic,meson-saradc

Core rework (heading towards multiple buffer support)
* refactor iio_device_register_eventset
* Null-ify IIO device's event_interface during unregister.

Features
* ad7291
- convert from platform_data to devicetree including bindings doc.
* core
- Add titles to a few IIO config symbols to allow simpler out of tree
building. It does little harm so why not enable it.

Fixes
* ad7292
- Fix missing of_node_put()
* at91-sama5d2
- Fix a crash due to missordering of dma enabling as a result of recent
IIO wide rework.
* gyro-adc
- Fix missing of_node_put()
* ltc2983
- Fix missing of_node_put()
* stm32-adc
- Fix an issue with runtime autosuspend related to parent autosuspending.

Cleanups
* counter/ti-eqep
- Tidy up a , instead of ;
* buffer-dmaengine
- Drop the unmanaged allocator functions as no one is using them.
* at91-sama5d2
- devm_platform_get_and_ioremap_resouce() replacing boilerplate.
* cros_ec
- move the hw fifo attributes setup into the cros_ec core.
* gp2ap002
- comment typo
* microchip-tcb-capture:
- consitifcation
* ssp
- Use PLATFORM_DEVID_NONE instead of -1 to convey true meaning.
* stm32-dfsdm
- devm_platform_get_and_ioremap_resouce() replacing boilerplate.

* tag 'iio-for-5.10c' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (25 commits)
iio: adc: gyroadc: fix leak of device node iterator
iio: adc: stm32-adc: fix runtime autosuspend delay when slow polling
iio: adc: at91-sama5d2_adc: fix DMA conversion crash
iio: ad7292: Fix of_node refcounting
iio: ltc2983: Fix of_node refcounting
counter: use semicolons rather than commas to separate statements
iio: buffer: Kconfig: add title for IIO_TRIGGERED_BUFFER symbol
iio: Kconfig: Provide title for IIO_TRIGGERED_EVENT symbol
iio: dma-buffer: Kconfig: Provide titles for IIO DMA Kconfig symbols
iio: cros_ec: unify hw fifo attributes into the core file
dt-bindings: iio: ad9467: add entries for for AD9434 & AD9265 ADCs
iio: adc: ad9467: add support for AD9265 high-speed ADC
iio: adc: ad9467: add support for AD9434 high-speed ADC
iio: adc: ad9467: wrap a axi-adc chip-info into a ad9467_chip_info type
iio: buffer-dmaengine: remove non managed alloc/free
iio: adc: stm32-dfsdm: Use devm_platform_get_and_ioremap_resource()
iio: adc: at91-sama5d2_adc: Use devm_platform_get_and_ioremap_resource()
iio: ssp: use PLATFORM_DEVID_NONE
dt-bindings: iio: adc: ad7291: add binding
iio: adc: ad7291: convert to device tree
...

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iio: Kconfig: Provide title for IIO_TRIGGERED_EVENT symbol

For some embedded systems, a workflow involving external kernel modules
that implement IIO devices is more practical than working with in-t

iio: Kconfig: Provide title for IIO_TRIGGERED_EVENT symbol

For some embedded systems, a workflow involving external kernel modules
that implement IIO devices is more practical than working with in-tree
sources.

Kconfig symbols without any titles do not show up in menuconfig, and as
such are more difficult to configure granularly, as they need to be
selected by potentially unused/un-needed drivers.

Albeit, the IIO_TRIGGERED_EVENT is used by a single mainline driver, this
could allow for some out-of-tree drivers to use this kmod.

This change adds a title to the IIO_TRIGGERED_EVENT Kconfig symbol.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200924111758.196367-3-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

show more ...

Merge branch 'master' into for-next

Sync with Linus' branch in order to be able to apply fixups
of more recent patches.

Merge branch 'next' into for-linus

Prepare input updates for 5.9 merge window.

Merge branch 'elan-i2c' into next

Bring in update to Elan touchpad driver to support newer touchpads with
higher resolution.

Merge branches 'for-5.7/upstream-fixes', 'for-5.8/apple', 'for-5.8/asus', 'for-5.8/core', 'for-5.8/intel-ish', 'for-5.8/logitech', 'for-5.8/mcp2221' and 'for-5.8/multitouch' into for-linus