[PATCH v5 0/4] iio: accel: adxl345: add calibration offset and sampling frequency support

[Akinobu Mita <akinobu.mita@gmail.com>]

This patchset adds calibration offset and sampling frequency support for
adxl345 driver with some preparatory changes.

* v5 (Suggested by Andy Shevchenko)
- Introduce constant for nHZ per HZ
- Find an register setting without looping over all available frequencies
- Allow all user supplied values and round to an available frequency

* v4 (Suggested by Jonathan Cameron)
- Stop abusing scan_index and keep using address field in iio_chan_spec

* v3 (Suggested by Andy Shevchenko)
- Define ADXL345_REG_DATA_AXIS(si) for cleaner register access
- Define ADXL345_REG_OSF_AXIS(si) for cleaner register access
- Calculate sampling frequency at runtime instead of having constant table

* v2
- Adjust the value for the calibbias to make the same scale as the _raw
  measurement, and remove misused calibscale.

Akinobu Mita (4):
  iio: accel: adxl345: add link to datasheet
  iio: accel: adxl345: convert address field usage in iio_chan_spec
  iio: accel: adxl345: add calibration offset support
  iio: accel: adxl345: add sampling frequency support

 drivers/iio/accel/adxl345_core.c | 121 +++++++++++++++++++++++++++++++++++----
 1 file changed, 110 insertions(+), 11 deletions(-)

Cc: Eva Rachel Retuya <eraretuya@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
-- 
2.7.4