[PATCH v2 0/5] iio: Add output buffer support

[Alexandru Ardelean]

This patchset is based on the new multibuffer set.
It doesn't require the high-speed/mmap interface.
That will come later on a v2.

Changelog v1 -> v2:
* https://lore.kernel.org/linux-iio/20210212102021.47276-4-alexandru.ardelean@xxxxxxxxxx/T/#u
* removed DMA patches for now
* in patch 'iio: Add output buffer support'
  - added /sys/bus/iio/devices/iio:deviceX/bufferY/direction attribute
  - thinking about this, an update to the new buffer infrastructure is
    required when adding ADDAC/MxFE/transceivers; right now there is no
    problem, because we have only ADCs and DACs; but when we get
    transceivers, a bufferY/ directory needs to filter in/out
    scan_elements/ ; this only occured to me recently (it's one of those
    things that pops up later in mind)
* added 'iio: Documentation: update definitions for bufferY and scan_elements'
  - seems I forgot this on the original multibuffer patchset
* added 'iio: triggered-buffer: extend support to configure output buffers'
  - basically output triggered buffer support
* added 'iio: dac: ad5686: Add PWM as a trigger source'
  - this is a first user of this infrastructure

Alexandru Ardelean (2):
  iio: Documentation: update definitions for bufferY and scan_elements
  iio: triggered-buffer: extend support to configure output buffers

Lars-Peter Clausen (2):
  iio: Add output buffer support
  iio: kfifo-buffer: Add output buffer support

Mircea Caprioru (1):
  iio: dac: ad5686: Add PWM as a trigger source

 Documentation/ABI/testing/sysfs-bus-iio       |  92 +++++++++++
 drivers/iio/accel/adxl372.c                   |   1 +
 drivers/iio/accel/bmc150-accel-core.c         |   1 +
 drivers/iio/adc/at91-sama5d2_adc.c            |   4 +-
 .../buffer/industrialio-triggered-buffer.c    |   8 +-
 drivers/iio/buffer/kfifo_buf.c                |  50 ++++++
 .../cros_ec_sensors/cros_ec_sensors_core.c    |   1 +
 .../common/hid-sensors/hid-sensor-trigger.c   |   5 +-
 drivers/iio/dac/ad5686-spi.c                  |   2 +-
 drivers/iio/dac/ad5686.c                      | 146 +++++++++++++++++-
 drivers/iio/dac/ad5686.h                      |   7 +-
 drivers/iio/dac/ad5696-i2c.c                  |   2 +-
 drivers/iio/industrialio-buffer.c             | 128 ++++++++++++++-
 include/linux/iio/buffer.h                    |   7 +
 include/linux/iio/buffer_impl.h               |  11 ++
 include/linux/iio/triggered_buffer.h          |  11 +-
 16 files changed, 459 insertions(+), 17 deletions(-)

-- 
2.17.1