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4538c18568
linux/drivers/iio
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Lars-Peter Clausen 4538c18568 iio: buffer-dmaengine: Report buffer length requirements 
The dmaengine buffer has some length alignment requirements that can differ
from platform to platform. If the length alignment requirements are not met
unexpected behavior like dropping of samples can occur.

Currently these requirements are not reported and applications need to know
the requirements of the platform by some out-of-band means.

Add a new buffer attribute that reports the length alignment requirements
called `length_align_bytes`. The reported length alignment is in bytes that
means the buffer length alignment in sample sets depends on the number of
enabled channels and the bytes per channel. Applications using this
attribute to determine the buffer size requirements need to consider this.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-12-29 15:20:09 +00:00
..
accel iio: accel: bma180: Use explicit member assignment 2019-12-29 15:20:08 +00:00
adc iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928 2019-12-29 15:20:03 +00:00
afe treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
amplifiers Second set of IIO device support, features, cleanups and minor fixes for 5.3. 2019-07-01 10:58:13 +02:00
buffer iio: buffer-dmaengine: Report buffer length requirements 2019-12-29 15:20:09 +00:00
chemical iio: chemical: atlas-ph-sensor: rename atlas-ph-sensor to atlas-sensor 2019-12-29 15:20:06 +00:00
common iio: st_sensors: Describe function parameters in kernel-doc 2019-12-29 15:20:05 +00:00
dac iio: ad5592r: Drop surplus GPIO header 2019-12-15 11:42:16 +00:00
dummy spi: docs: convert to ReST and add it to the kABI bookset 2019-07-31 14:13:13 -06:00
frequency iio: adf4350: Convert to use GPIO descriptor 2019-12-15 11:42:16 +00:00
gyro iio: gyro: st_gyro: Mark gyro_pdata with __maybe_unused 2019-12-29 15:20:05 +00:00
health treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
humidity iio: humidity: hts221: move register definitions to sensor structs 2019-12-15 11:42:17 +00:00
imu iio: imu: st_lsm6dsx: enable sensor-hub support for lsm6dsm 2019-12-29 15:20:07 +00:00
light iio: light: remove unneeded semicolon 2019-12-29 15:20:06 +00:00
magnetometer iio: ak8975: Convert to use GPIO descriptor 2019-12-15 11:42:14 +00:00
multiplexer treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
orientation treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 309 2019-06-05 17:37:04 +02:00
potentiometer iio: potentiometer: add a driver for Maxim 5432-5435 2019-08-05 14:25:08 +01:00
potentiostat treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
pressure iio: pressure: Add driver for DLH pressure sensors 2019-12-29 15:20:08 +00:00
proximity iio: as3935: Drop GPIO includes 2019-12-15 11:42:15 +00:00
resolver iio: ad2s1200: Drop legacy include 2019-12-15 11:42:15 +00:00
temperature iio: maxim_thermocouple: add thermocouple_type sysfs attribute 2019-11-23 14:25:02 +00:00
trigger iio: trigger: stm32-timer: remove unnecessary update event 2019-12-01 10:20:21 +00:00
iio_core_trigger.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
iio_core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-buffer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-configfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-core.c iio: core: add thermocouple_type standard attribute 2019-11-23 12:35:19 +00:00
industrialio-event.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-sw-device.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-sw-trigger.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-trigger.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-triggered-event.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
inkern.c Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
Kconfig Second set of IIO device support, features, cleanups and minor fixes for 5.3. 2019-07-01 10:58:13 +02:00
Makefile counter: stm32-lptimer: add counter device 2019-04-25 21:33:41 +02:00