[PATCH v9 0/4] iio: accel: adxl345: add FIFO operating with IRQ triggered watermark events

[Lothar Rubusch <l.rubusch@gmail.com>]

The adxl345 sensor offers several features. Most of them are based on
using the hardware FIFO and reacting on events coming in on an interrupt
line. Add access to configure and read out the FIFO, handling of interrupts
and configuration and application of the watermark feature on that FIFO.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
---
v8 -> v9:
- move FIELD_PREP() usage to a local usage in adxl345_core.c
- remove ADXL345_{SD}_TAP_MSK macros
v7 -> v8:
- remove dt-binding quotation marks
- add DMA alignment
- fix indention, formatting and text alignment
v6 -> v7:
- reorder dt-binding patches
- extracted FIFO specific from constants list
- reorder constants list in header patch to the end
- verify watermark input is within valid range
v5 -> v6:
- dropped justify patch, since unnecessary change to format mask
- added separate dt-bindings patch to remove required interrupts property
- merged FIFO watermark patches
- reworked bitfield handling
- group irq setup in probe()
- several type fixes by smatch and tools
v4 -> v5:
- fix dt-binding for enum array of INT1 and INT2
v3 -> v4:
- fix dt-binding indention 
v2 -> v3:
- reorganize commits, merge the watermark handling
- INT lines are defined by binding
- kfifo is prepared by devm_iio_kfifo_buffer_setup()
- event handler is registered w/ devm_request_threaded_irq()
v1 -> v2:
Fix comments according to Documentation/doc-guide/kernel-doc.rst
and missing static declaration of function.
---
Lothar Rubusch (4):
  iio: accel: adxl345: introduce interrupt handling
  iio: accel: adxl345: initialize FIFO delay value for SPI
  iio: accel: adxl345: add FIFO with watermark events
  iio: accel: adxl345: complete the list of defines

 drivers/iio/accel/adxl345.h      |  77 +++++--
 drivers/iio/accel/adxl345_core.c | 338 ++++++++++++++++++++++++++++++-
 drivers/iio/accel/adxl345_i2c.c  |   2 +-
 drivers/iio/accel/adxl345_spi.c  |   7 +-
 4 files changed, 404 insertions(+), 20 deletions(-)

-- 
2.39.5