Introduce the DATA_READY trigger and enable triggered buffering. Additional
changes include introduction of functions set_mode and data_ready, allow
either INT1/INT2 pin be used by specifying interrupt-names.
Triggered buffer was tested on both DATA_READY trigger and the hrtimer software
trigger.
~ # ls /sys/bus/iio/devices/
iio:device0 trigger0 trigger1
~ # ls /config/iio/triggers/hrtimer/
t1
~ # cat /sys/bus/iio/devices/trigger0/name
t1
~ # cat /sys/bus/iio/devices/trigger1/name
adxl345-dev0
~ # iio_generic_buffer -n adxl345 -t t1 -c 5 -l 20 -a
iio device number being used is 0
iio trigger number being used is 0
Enabling all channels
Enabling: in_accel_y_en
Enabling: in_accel_x_en
Enabling: in_timestamp_en
Enabling: in_accel_z_en
/sys/bus/iio/devices/iio:device0 t1
0.306400 0.880900 9.575000 1493432411145155964
0.306400 0.880900 9.575000 1493432411185154872
0.306400 0.919200 9.536700 1493432411225167667
0.306400 0.880900 9.536700 1493432411265157809
0.344700 0.919200 9.536700 1493432411295108767
Disabling: in_accel_y_en
Disabling: in_accel_x_en
Disabling: in_timestamp_en
Disabling: in_accel_z_en
~ # iio_generic_buffer -n adxl345 -t adxl345-dev0 -c 5 -l 20 -a
iio device number being used is 0
iio trigger number being used is 1
Enabling all channels
Enabling: in_accel_y_en
Enabling: in_accel_x_en
Enabling: in_timestamp_en
Enabling: in_accel_z_en
/sys/bus/iio/devices/iio:device0 adxl345-dev0
0.344700 0.919200 9.689900 1493432411336475189
0.344700 0.880900 9.575000 1493432411336475189
0.306400 0.957500 9.651600 1493432411336475189
0.306400 0.880900 9.575000 1493432411336475189
0.306400 0.919200 9.536700 1493432411336475189
Disabling: in_accel_y_en
Disabling: in_accel_x_en
Disabling: in_timestamp_en
Disabling: in_accel_z_en
~ #
Changes in v2:
* Provide a detailed commit message to those missing it
* Add Rob's Acked-by tag
* Make function naming more clear: drdy -> data_ready
* Switch from while to do..while
* Rename regval to val
* Switch to usleep_range() for shorter delay
* Add comment to justify delay
* Change error code -EIO to -EAGAIN
* Endianness issue: scrap the get_triple function entirely, make no
changes in terms of reading registers in read_raw
* Introduce mutex earlier rather than in succeeding patch
* Probe:
* Fix random whitespace omission
* Remove configuring to standby mode, the device powers on in standby
mode so this is not needed
* use variable 'regval' to hold value to be written to the register and call
regmap_write() unconditionally
* fix line splitting in devm_request_threaded_irq() and
devm_iio_trigger_alloc()
* Switch to devm_iio_trigger_register()
* Switch to devm_iio_triggered_buffer_setup()
* Move the of_irq_get_byname() check in core file in order to avoid
introducing another parameter in probe()
* adxl345_irq():
* return values directly
* switch from iio_trigger_poll() to iio_trigger_poll_chained(), the former
should only be called at the top-half not at the bottom-half.
* adxl345_drdy_trigger_set_state():
* move regmap_get_device() to definition block
* regmap_update_bits(): line splitting - one parameter per line, remove extra
parenthesis
* adxl345_trigger_handler()
* if using external trigger, place a adxl345_data_ready() call before
performing a bulk read
* Since get_triple() is scrapped, place a direct bulk read here
* Move mutex unlocking below goto label
* Remove i2c_check_functionality() that could introduce regression
Eva Rachel Retuya (4):
dt-bindings: iio: accel: adxl345: Add optional interrupt-names support
iio: accel: adxl345_core: Introduce set_mode and data_ready functions
iio: accel: adxl345: Setup DATA_READY trigger
iio: accel: adxl345: Add support for triggered buffer
.../devicetree/bindings/iio/accel/adxl345.txt | 4 +
drivers/iio/accel/Kconfig | 2 +
drivers/iio/accel/adxl345.h | 2 +-
drivers/iio/accel/adxl345_core.c | 281 ++++++++++++++++++++-
drivers/iio/accel/adxl345_i2c.c | 3 +-
drivers/iio/accel/adxl345_spi.c | 2 +-
6 files changed, 278 insertions(+), 16 deletions(-)
--
2.7.4
